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11698 10076 10734 11540 11897 10000 10000 11717.79585 10657 10657 10657 10657 11803 11169.47043 10500 10500 10500 11438 11688 11343 11343 10000 10000 11343 11803 11803 11803 11803 10087 10051 10051 10000 10547 10083 10649 11730 11730 10051 10582 11698 11730 11730 10721 10274 10473 10278 11698 10703 10768 12030 12542 10582 11985 12309 10705 10721 10274 10000 11072 11969 10703 10582 10000 10657 10000 10500 10083 11730 11343 10750 10204 11271 11730 11803 10000 10274 12542 10493 11036 11460 10014 10340 9836 11821 12030 10000 10493 10915 10400 10000 10000 10000 10000 11036 11000 10649 11821 12542 12225 10035 10781 10703 12030 10649 12955 10947 10077 10649 9972 11521 10915 11126 10083 10000 11262 11821 10495.9942 10083 10083 10083 10962 11352 11271 10203 11096 11730 11352 12542 12955 10000 11473 11271 10692 10000 10442 11352 10000 10273.15408 10692 11750 10357 10460 10410 11438 10414 10170 10051 10051 10051 10051 10051 10051 10340 11343 10318 11438 11343 11000 12542 10040 10657 10083 10491 10000 12168 10773 11036 11682 10026 10242 10582 10582 10582 10771 11698 12030 10686.75826 11438 10850 10000 9750 11000 11121 11247 11104 10000 10649 10427 12225 10340 11803 11821 12030 10000 10771 10128 11730 11730 11730 11730 11730 12225 10614 11030 11072 9575 10000 10743 12542 10771 11478 10410 10000 12090 10703 10340 12309 11271 10227 11000 10486 11987 12955 10070 9829.828419 11884 12955 11698 11698 11698 10315 10797 12225 10046 10135 11323 11036 10000 12542 10070 10274 11438 10818 10500 10051 10388 11267 11821 11816 10793 12309 12309 10135 10703 10703 10703 11343 10070 11352 10249 9977 11479 11072 11077 12361 10000 10500 10000 9999 10274 10925 11072 12955 10998.81103 9844 11234 10500 11352 11104 10263 9575 10703 10657 10070 10000 10514 10340 10651 10076 11408 10410 10925 11680 10051 10771 10150 11408 10925 10925 10411 10040 10051 11730 9859 10690 12309 10884 10410 11742 10703 11803 9995 10771 11698 10391 10925 11234 10657 11000 12429 10274 9895 10350 10170 10083 10051 10423 10076 10000 9950 10760 10410 10000 10391.24839 10211 10871.02137 11392 10340 10940 10216 10614 10994 10070 10076 10046 10657 10943 10000 10000 10000 11969 11698 10234 11271 9731 12030 10297 12377 11352 12955 10274 9925 10271 11438 10771 10421 11000 10298 10825 10204 10582 12309 11000 10000 11423 10582 10310 10000 11803 9979 0000063075 false Class A Class A Class I Class B Class B Class C Class R6 Class A Class R2 Class R1 Class R6 MLMRX Class C Class R1 Class R4 Class R3 Class R6 Class R2 Class R1 N-1A Class R4 Class I Class C Class I Class R4 Class B Class R6 Class A Class R3 MQLHX MRBBX MRBFX MTLRX Class R3 MFBHX Class I MRBCX MBDIX MRRRX MRBKX MQLFX MQLIX MFBCX MFBKX MFBFX MFBBX MTLBX MRBHX MTLFX MFBJX MBRRX MQLJX MQLKX MQLGX Class R2 MRBGX MRBIX MTLIX MRBJX MTLCX MFBGX Class B Class C MQLCX MQLBX N-CSR MFS SERIES TRUST IX 2026-04-30 MFS® Corporate Bond Fund This annual shareholder report contains important information about MFS Corporate Bond Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>78</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">0.76<span>%</span></td> </tr> </table> 78 0.0076 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div><div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class A shares of the MFS Corporate Bond Fund (fund) provided a total return of <span style="white-space: nowrap;">5.20%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06%</span> for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg U.S. Credit Index, generated a return of <span style="white-space: nowrap;">5.25%</span>.</div> </li> </ul> </div><div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div><div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg U.S. Credit Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's out-of-benchmark exposure to both the BB and B-rated credit quality segments, and its overweight exposure to BBB-rated bonds, supported relative performance.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Favorable security selection within both A and BBB-rated bonds, particularly within the communications sector, also contributed to the fund's relative returns.</div> </li> </ul> </li> </ul> </div><div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg U.S. Credit Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's underweight exposure to A-rated bonds held back relative performance.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Security selection within the energy sector also weakened relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class A over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. This graph includes the deduction of the maximum applicable sales charge.</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2363356.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">A without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">5.20<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.44<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.59<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">A with initial sales charge (4.25%)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.73<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">(0.42<span>)</span><span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.14<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Credit Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">5.25<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.65<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.62<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> A without sales charge 0.0520 0.0044 0.0259 A with initial sales charge (4.25%) 0.0073 -0.0042 0.0214 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 Bloomberg U.S. Credit Index 0.0525 0.0065 0.0262 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/a</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">4,394,650,297</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">9.3</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">427</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">6.6</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">16,745,757</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">41</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 4394650297 427 16745757 0.41 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">98.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit<br/>quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">32.1<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">50.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">7.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">D</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.1<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.982 0.018 0.032 0.027 0.321 0.500 0.070 0.019 0.002 0.011 0.000 0.018 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Corporate Bond Fund This annual shareholder report contains important information about MFS Corporate Bond Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>154</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">1.51<span>%</span></td> </tr> </table> 154 0.0151 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class B shares of the MFS Corporate Bond Fund (fund) provided a total return of <span style="white-space: nowrap;">4.42%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06%</span> for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg U.S. Credit Index, generated a return of <span style="white-space: nowrap;">5.25%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg U.S. Credit Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's out-of-benchmark exposure to both the BB and B-rated credit quality segments, and its overweight exposure to BBB-rated bonds, supported relative performance.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Favorable security selection within both A and BBB-rated bonds, particularly within the communications sector, also contributed to the fund's relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg U.S. Credit Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's underweight exposure to A-rated bonds held back relative performance.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Security selection within the energy sector also weakened relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class B over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2362595.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">B without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.42<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">(0.30<span>)</span><span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.83<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">B with CDSC (declining over six years from 4% to 0%)<sup style="font-size: smaller; vertical-align: super;">×</sup></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.42<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">(0.63<span>)</span><span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.83<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Credit Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">5.25<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.65<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.62<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">×</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Assuming redemption at the end of the applicable period.</div> </td> </tr> </table> B without sales charge 0.0442 -0.0030 0.0183 B with CDSC (declining over six years from 4% to 0%) 0.0042 -0.0063 0.0183 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 Bloomberg U.S. Credit Index 0.0525 0.0065 0.0262 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/b</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">4,394,650,297</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">9.3</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">427</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">6.6</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">16,745,757</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">41</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 4394650297 427 16745757 0.41 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">98.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit<br/>quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">32.1<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">50.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">7.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">D</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.1<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.982 0.018 0.032 0.027 0.321 0.500 0.070 0.019 0.002 0.011 0.000 0.018 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Corporate Bond Fund This annual shareholder report contains important information about MFS Corporate Bond Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">C</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>154</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">1.51<span>%</span></td> </tr> </table> 154 0.0151 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class C shares of the MFS Corporate Bond Fund (fund) provided a total return of <span style="white-space: nowrap;">4.42%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06%</span> for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg U.S. Credit Index, generated a return of <span style="white-space: nowrap;">5.25%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg U.S. Credit Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's out-of-benchmark exposure to both the BB and B-rated credit quality segments, and its overweight exposure to BBB-rated bonds, supported relative performance.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Favorable security selection within both A and BBB-rated bonds, particularly within the communications sector, also contributed to the fund's relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg U.S. Credit Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's underweight exposure to A-rated bonds held back relative performance.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Security selection within the energy sector also weakened relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class C over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2362698.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">C without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.42<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">(0.30<span>)</span><span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.83<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">C with CDSC (1% for 12 months)<sup style="font-size: smaller; vertical-align: super;">×</sup></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">3.42<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">(0.30<span>)</span><span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.83<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Credit Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">5.25<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.65<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.62<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">×</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Assuming redemption at the end of the applicable period.</div> </td> </tr> </table> C without sales charge 0.0442 -0.0030 0.0183 C with CDSC (1% for 12 months) 0.0342 -0.0030 0.0183 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 Bloomberg U.S. Credit Index 0.0525 0.0065 0.0262 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/c</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">4,394,650,297</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">9.3</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">427</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">6.6</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">16,745,757</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">41</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 4394650297 427 16745757 0.41 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">98.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit<br/>quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">32.1<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">50.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">7.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">D</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.1<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.982 0.018 0.032 0.027 0.321 0.500 0.070 0.019 0.002 0.011 0.000 0.018 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Corporate Bond Fund This annual shareholder report contains important information about MFS Corporate Bond Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">I</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>52</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">0.51<span>%</span></td> </tr> </table> 52 0.0051 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class I shares of the MFS Corporate Bond Fund (fund) provided a total return of <span style="white-space: nowrap;">5.55%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06%</span> for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg U.S. Credit Index, generated a return of <span style="white-space: nowrap;">5.25%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg U.S. Credit Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's out-of-benchmark exposure to both the BB and B-rated credit quality segments, and its overweight exposure to BBB-rated bonds, supported relative performance.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Favorable security selection within both A and BBB-rated bonds, particularly within the communications sector, also contributed to the fund's relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg U.S. Credit Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's underweight exposure to A-rated bonds held back relative performance.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Security selection within the energy sector also weakened relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class I over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2362792.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">I without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">5.55<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.71<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.84<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Credit Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">5.25<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.65<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.62<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> I without sales charge 0.0555 0.0071 0.0284 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 Bloomberg U.S. Credit Index 0.0525 0.0065 0.0262 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/i</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">4,394,650,297</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">9.3</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">427</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">6.6</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">16,745,757</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">41</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 4394650297 427 16745757 0.41 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">98.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">32.1<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">50.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">7.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">D</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.1<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.982 0.018 0.032 0.027 0.321 0.500 0.070 0.019 0.002 0.011 0.000 0.018 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Corporate Bond Fund This annual shareholder report contains important information about MFS Corporate Bond Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">R1</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>154</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">1.51<span>%</span></td> </tr> </table> 154 0.0151 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class R1 shares of the MFS Corporate Bond Fund (fund) provided a total return of <span style="white-space: nowrap;">4.51%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06%</span> for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg U.S. Credit Index, generated a return of <span style="white-space: nowrap;">5.25%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg U.S. Credit Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's out-of-benchmark exposure to both the BB and B-rated credit quality segments, and its overweight exposure to BBB-rated bonds, supported relative performance.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Favorable security selection within both A and BBB-rated bonds, particularly within the communications sector, also contributed to the fund's relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg U.S. Credit Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's underweight exposure to A-rated bonds held back relative performance.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Security selection within the energy sector also weakened relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class R1 over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2362886.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">R1 without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.51<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">(0.28<span>)</span><span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.84<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Credit Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">5.25<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.65<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.62<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> R1 without sales charge 0.0451 -0.0028 0.0184 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 Bloomberg U.S. Credit Index 0.0525 0.0065 0.0262 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/r1</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">4,394,650,297</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">9.3</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">427</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">6.6</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">16,745,757</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">41</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 4394650297 427 16745757 0.41 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">98.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">32.1<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">50.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">7.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">D</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.1<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.982 0.018 0.032 0.027 0.321 0.500 0.070 0.019 0.002 0.011 0.000 0.018 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Corporate Bond Fund This annual shareholder report contains important information about MFS Corporate Bond Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">R2</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>103</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">1.01<span>%</span></td> </tr> </table> 103 0.0101 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class R2 shares of the MFS Corporate Bond Fund (fund) provided a total return of <span style="white-space: nowrap;">4.94%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06%</span> for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg U.S. Credit Index, generated a return of <span style="white-space: nowrap;">5.25%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg U.S. Credit Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's out-of-benchmark exposure to both the BB and B-rated credit quality segments, and its overweight exposure to BBB-rated bonds, supported relative performance.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Favorable security selection within both A and BBB-rated bonds, particularly within the communications sector, also contributed to the fund's relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg U.S. Credit Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's underweight exposure to A-rated bonds held back relative performance.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Security selection within the energy sector also weakened relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class R2 over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2362980.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">R2 without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.94<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.21<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.34<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Credit Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">5.25<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.65<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.62<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> R2 without sales charge 0.0494 0.0021 0.0234 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 Bloomberg U.S. Credit Index 0.0525 0.0065 0.0262 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/r2</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">4,394,650,297</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">9.3</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">427</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">6.6</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">16,745,757</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">41</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 4394650297 427 16745757 0.41 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">98.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">32.1<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">50.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">7.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">D</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.1<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.982 0.018 0.032 0.027 0.321 0.500 0.070 0.019 0.002 0.011 0.000 0.018 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Corporate Bond Fund This annual shareholder report contains important information about MFS Corporate Bond Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">R3</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>78</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">0.76<span>%</span></td> </tr> </table> 78 0.0076 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class R3 shares of the MFS Corporate Bond Fund (fund) provided a total return of <span style="white-space: nowrap;">5.20%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06%</span> for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg U.S. Credit Index, generated a return of <span style="white-space: nowrap;">5.25%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg U.S. Credit Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's out-of-benchmark exposure to both the BB and B-rated credit quality segments, and its overweight exposure to BBB-rated bonds, supported relative performance.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Favorable security selection within both A and BBB-rated bonds, particularly within the communications sector, also contributed to the fund's relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg U.S. Credit Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's underweight exposure to A-rated bonds held back relative performance.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Security selection within the energy sector also weakened relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class R3 over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2363074.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">R3 without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">5.20<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.46<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.60<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Credit Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">5.25<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.65<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.62<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> R3 without sales charge 0.0520 0.0046 0.0260 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 Bloomberg U.S. Credit Index 0.0525 0.0065 0.0262 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/r3</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">4,394,650,297</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">9.3</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">427</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">6.6</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">16,745,757</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">41</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 4394650297 427 16745757 0.41 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">98.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">32.1<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">50.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">7.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">D</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.1<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.982 0.018 0.032 0.027 0.321 0.500 0.070 0.019 0.002 0.011 0.000 0.018 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Corporate Bond Fund This annual shareholder report contains important information about MFS Corporate Bond Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">R4</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>52</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">0.51<span>%</span></td> </tr> </table> 52 0.0051 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class R4 shares of the MFS Corporate Bond Fund (fund) provided a total return of <span style="white-space: nowrap;">5.63%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06%</span> for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg U.S. Credit Index, generated a return of <span style="white-space: nowrap;">5.25%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg U.S. Credit Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's out-of-benchmark exposure to both the BB and B-rated credit quality segments, and its overweight exposure to BBB-rated bonds, supported relative performance.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Favorable security selection within both A and BBB-rated bonds, particularly within the communications sector, also contributed to the fund's relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg U.S. Credit Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's underweight exposure to A-rated bonds held back relative performance.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Security selection within the energy sector also weakened relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class R4 over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2363168.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">R4 without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">5.63<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.74<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.87<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Credit Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">5.25<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.65<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.62<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> R4 without sales charge 0.0563 0.0074 0.0287 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 Bloomberg U.S. Credit Index 0.0525 0.0065 0.0262 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/r4</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">4,394,650,297</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">9.3</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">427</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">6.6</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">16,745,757</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">41</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 4394650297 427 16745757 0.41 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">98.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">32.1<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">50.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">7.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">D</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.1<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.982 0.018 0.032 0.027 0.321 0.500 0.070 0.019 0.002 0.011 0.000 0.018 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Corporate Bond Fund This annual shareholder report contains important information about MFS Corporate Bond Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">R6</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>42</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">0.41<span>%</span></td> </tr> </table> 42 0.0041 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class R6 shares of the MFS Corporate Bond Fund (fund) provided a total return of <span style="white-space: nowrap;">5.65%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06%</span> for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg U.S. Credit Index, generated a return of <span style="white-space: nowrap;">5.25%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg U.S. Credit Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's out-of-benchmark exposure to both the BB and B-rated credit quality segments, and its overweight exposure to BBB-rated bonds, supported relative performance.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Favorable security selection within both A and BBB-rated bonds, particularly within the communications sector, also contributed to the fund's relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg U.S. Credit Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's underweight exposure to A-rated bonds held back relative performance.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Security selection within the energy sector also weakened relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class R6 over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2363262.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">R6 without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">5.65<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.80<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.94<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Credit Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">5.25<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.65<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.62<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> R6 without sales charge 0.0565 0.0080 0.0294 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 Bloomberg U.S. Credit Index 0.0525 0.0065 0.0262 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/r6</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">4,394,650,297</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">9.3</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">427</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">6.6</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">16,745,757</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">41</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 4394650297 427 16745757 0.41 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">98.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">32.1<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">50.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">7.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">D</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.1<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.982 0.018 0.032 0.027 0.321 0.500 0.070 0.019 0.002 0.011 0.000 0.018 Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change. MFS® Limited Maturity Fund This annual shareholder report contains important information about MFS Limited Maturity Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>58</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">0.57<span>%</span></td> </tr> </table> 58 0.0057 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class A shares of the MFS Limited Maturity Fund (fund) provided a total return of <span style="white-space: nowrap;">4.04%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06%</span> for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg 1-3 Year U.S. Government/Credit Bond Index, generated a return of <span style="white-space: nowrap;">3.42%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg 1-3 Year U.S. Government/Credit Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's out-of-benchmark exposure to the collateralized mortgage obligation (CMO) sector strengthened relative performance. Security selection within the industrials sector also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, security selection within BBB-rated bonds benefited relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg 1-3 Year U.S. Government/Credit Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">There were no material detractors from relative performance during the reporting period.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class A over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. This graph includes the deduction of the maximum applicable sales charge.</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2363920.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">A without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.04<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.50<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.41<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">A with initial sales charge (2.50%)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.44<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.98<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.16<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg 1-3 Year U.S. Government/Credit Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">3.42<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.07<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.03<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> A without sales charge 0.0404 0.0250 0.0241 A with initial sales charge (2.50%) 0.0144 0.0198 0.0216 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 Bloomberg 1-3 Year U.S. Government/Credit Bond Index 0.0342 0.0207 0.0203 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/a</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">3,352,561,328</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">2.9</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">396</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">2.1</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">11,048,122</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">50</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 3352561328 396 11048122 0.50 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">97.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">12.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">11.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">18.6<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">31.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CCC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">22.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Federal Agencies</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.4<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.972 0.028 0.129 0.112 0.186 0.319 0.000 0.000 0.222 0.004 0.000 0.028 Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change. MFS® Limited Maturity Fund This annual shareholder report contains important information about MFS Limited Maturity Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>134</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">1.32<span>%</span></td> </tr> </table> 134 0.0132 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class B shares of the MFS Limited Maturity Fund (fund) provided a total return of <span style="white-space: nowrap;">3.44%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06%</span> for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg 1-3 Year U.S. Government/Credit Bond Index, generated a return of <span style="white-space: nowrap;">3.42%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg 1-3 Year U.S. Government/Credit Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's out-of-benchmark exposure to the collateralized mortgage obligation (CMO) sector strengthened relative performance. Security selection within the industrials sector also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, security selection within BBB-rated bonds benefited relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg 1-3 Year U.S. Government/Credit Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">There were no material detractors from relative performance during the reporting period.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class B over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2364014.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">B without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">3.44<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.77<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.68<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">B with CDSC (declining over six years from 4% to 0%)<sup style="font-size: smaller; vertical-align: super;">×</sup></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">(0.55<span>)</span><span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.41<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.68<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg 1-3 Year U.S. Government/Credit Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">3.42<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.07<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.03<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">×</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Assuming redemption at the end of the applicable period.</div> </td> </tr> </table> B without sales charge 0.0344 0.0177 0.0168 B with CDSC (declining over six years from 4% to 0%) -0.0055 0.0141 0.0168 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 Bloomberg 1-3 Year U.S. Government/Credit Bond Index 0.0342 0.0207 0.0203 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/b</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">3,352,561,328</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">2.9</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">396</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">2.1</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">11,048,122</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">50</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 3352561328 396 11048122 0.50 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">97.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">12.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">11.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">18.6<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">31.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CCC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">22.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Federal Agencies</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.4<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.972 0.028 0.129 0.112 0.186 0.319 0.000 0.000 0.222 0.004 0.000 0.028 Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change. MFS® Limited Maturity Fund This annual shareholder report contains important information about MFS Limited Maturity Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">C</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>144</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">1.42<span>%</span></td> </tr> </table> 144 0.0142 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class C shares of the MFS Limited Maturity Fund (fund) provided a total return of <span style="white-space: nowrap;">3.16%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06%</span> for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg 1-3 Year U.S. Government/Credit Bond Index, generated a return of <span style="white-space: nowrap;">3.42%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg 1-3 Year U.S. Government/Credit Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's out-of-benchmark exposure to the collateralized mortgage obligation (CMO) sector strengthened relative performance. Security selection within the industrials sector also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, security selection within BBB-rated bonds benefited relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg 1-3 Year U.S. Government/Credit Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">There were no material detractors from relative performance during the reporting period.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class C over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2364108.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">C without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">3.16<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.63<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.57<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">C with CDSC (1% for 12 months)<sup style="font-size: smaller; vertical-align: super;">×</sup></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.17<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.63<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.57<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg 1-3 Year U.S. Government/Credit Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">3.42<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.07<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.03<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">×</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Assuming redemption at the end of the applicable period.</div> </td> </tr> </table> C without sales charge 0.0316 0.0163 0.0157 C with CDSC (1% for 12 months) 0.0217 0.0163 0.0157 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 Bloomberg 1-3 Year U.S. Government/Credit Bond Index 0.0342 0.0207 0.0203 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/c</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">3,352,561,328</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">2.9</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">396</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">2.1</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">11,048,122</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">50</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 3352561328 396 11048122 0.50 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">97.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">12.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">11.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">18.6<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">31.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CCC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">22.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Federal Agencies</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.4<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.972 0.028 0.129 0.112 0.186 0.319 0.000 0.000 0.222 0.004 0.000 0.028 Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change. MFS® Limited Maturity Fund This annual shareholder report contains important information about MFS Limited Maturity Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">I</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>43</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">0.42<span>%</span></td> </tr> </table> 43 0.0042 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class I shares of the MFS Limited Maturity Fund (fund) provided a total return of <span style="white-space: nowrap;">4.37%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06%</span> for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg 1-3 Year U.S. Government/Credit Bond Index, generated a return of <span style="white-space: nowrap;">3.42%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg 1-3 Year U.S. Government/Credit Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's out-of-benchmark exposure to the collateralized mortgage obligation (CMO) sector strengthened relative performance. Security selection within the industrials sector also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, security selection within BBB-rated bonds benefited relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg 1-3 Year U.S. Government/Credit Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">There were no material detractors from relative performance during the reporting period.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class I over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2364202.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">I without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.37<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.65<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.58<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg 1-3 Year U.S. Government/Credit Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">3.42<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.07<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.03<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> I without sales charge 0.0437 0.0265 0.0258 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 Bloomberg 1-3 Year U.S. Government/Credit Bond Index 0.0342 0.0207 0.0203 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/i</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">3,352,561,328</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">2.9</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">396</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">2.1</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">11,048,122</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">50</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 3352561328 396 11048122 0.50 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">97.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit <br/>quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">12.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">11.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">18.6<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">31.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CCC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">22.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Federal Agencies</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.4<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.972 0.028 0.129 0.112 0.186 0.319 0.000 0.000 0.222 0.004 0.000 0.028 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Limited Maturity Fund This annual shareholder report contains important information about MFS Limited Maturity Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">R1</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>144</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">1.42<span>%</span></td> </tr> </table> 144 0.0142 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class R1 shares of the MFS Limited Maturity Fund (fund) provided a total return of <span style="white-space: nowrap;">3.16%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06%</span> for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg 1-3 Year U.S. Government/Credit Bond Index, generated a return of <span style="white-space: nowrap;">3.42%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg 1-3 Year U.S. Government/Credit Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's out-of-benchmark exposure to the collateralized mortgage obligation (CMO) sector strengthened relative performance. Security selection within the industrials sector also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, security selection within BBB-rated bonds benefited relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg 1-3 Year U.S. Government/Credit Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">There were no material detractors from relative performance during the reporting period.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class R1 over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2364296.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">R1 without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">3.16<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.60<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.55<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg 1-3 Year U.S. Government/Credit Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">3.42<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.07<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.03<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> R1 without sales charge 0.0316 0.0160 0.0155 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 Bloomberg 1-3 Year U.S. Government/Credit Bond Index 0.0342 0.0207 0.0203 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/r1</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">3,352,561,328</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">2.9</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">396</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">2.1</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">11,048,122</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">50</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 3352561328 396 11048122 0.50 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">97.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit <br/>quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">12.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">11.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">18.6<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">31.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CCC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">22.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Federal Agencies</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.4<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.972 0.028 0.129 0.112 0.186 0.319 0.000 0.000 0.222 0.004 0.000 0.028 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Limited Maturity Fund This annual shareholder report contains important information about MFS Limited Maturity Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">R2</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>84</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">0.82<span>%</span></td> </tr> </table> 84 0.0082 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class R2 shares of the MFS Limited Maturity Fund (fund) provided a total return of <span style="white-space: nowrap;">3.96%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06%</span> for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg 1-3 Year U.S. Government/Credit Bond Index, generated a return of <span style="white-space: nowrap;">3.42%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg 1-3 Year U.S. Government/Credit Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's out-of-benchmark exposure to the collateralized mortgage obligation (CMO) sector strengthened relative performance. Security selection within the industrials sector also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, security selection within BBB-rated bonds benefited relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg 1-3 Year U.S. Government/Credit Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">There were no material detractors from relative performance during the reporting period.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class R2 over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2364390.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">R2 without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">3.96<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.24<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.18<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg 1-3 Year U.S. Government/Credit Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">3.42<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.07<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.03<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> R2 without sales charge 0.0396 0.0224 0.0218 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 Bloomberg 1-3 Year U.S. Government/Credit Bond Index 0.0342 0.0207 0.0203 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/r2</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">3,352,561,328</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">2.9</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">396</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">2.1</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">11,048,122</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">50</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 3352561328 396 11048122 0.50 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">97.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit <br/>quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">12.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">11.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">18.6<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">31.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CCC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">22.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Federal Agencies</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.4<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.972 0.028 0.129 0.112 0.186 0.319 0.000 0.000 0.222 0.004 0.000 0.028 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Limited Maturity Fund This annual shareholder report contains important information about MFS Limited Maturity Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">R3</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>68</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">0.67<span>%</span></td> </tr> </table> 68 0.0067 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class R3 shares of the MFS Limited Maturity Fund (fund) provided a total return of <span style="white-space: nowrap;">4.11%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06%</span> for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg 1-3 Year U.S. Government/Credit Bond Index, generated a return of <span style="white-space: nowrap;">3.42%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg 1-3 Year U.S. Government/Credit Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's out-of-benchmark exposure to the collateralized mortgage obligation (CMO) sector strengthened relative performance. Security selection within the industrials sector also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, security selection within BBB-rated bonds benefited relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg 1-3 Year U.S. Government/Credit Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">There were no material detractors from relative performance during the reporting period.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class R3 over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2364484.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">R3 without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.11<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.40<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.33<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg 1-3 Year U.S. Government/Credit Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">3.42<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.07<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.03<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> R3 without sales charge 0.0411 0.0240 0.0233 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 Bloomberg 1-3 Year U.S. Government/Credit Bond Index 0.0342 0.0207 0.0203 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/r3</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">3,352,561,328</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">2.9</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">396</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">2.1</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">11,048,122</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">50</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 3352561328 396 11048122 0.50 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">97.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit <br/>quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">12.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">11.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">18.6<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">31.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CCC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">22.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Federal Agencies</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.4<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.972 0.028 0.129 0.112 0.186 0.319 0.000 0.000 0.222 0.004 0.000 0.028 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Limited Maturity Fund This annual shareholder report contains important information about MFS Limited Maturity Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">R4</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>43</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">0.42<span>%</span></td> </tr> </table> 43 0.0042 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class R4 shares of the MFS Limited Maturity Fund (fund) provided a total return of <span style="white-space: nowrap;">4.20%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06%</span> for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg 1-3 Year U.S. Government/Credit Bond Index, generated a return of <span style="white-space: nowrap;">3.42%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg 1-3 Year U.S. Government/Credit Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's out-of-benchmark exposure to the collateralized mortgage obligation (CMO) sector strengthened relative performance. Security selection within the industrials sector also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, security selection within BBB-rated bonds benefited relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg 1-3 Year U.S. Government/Credit Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">There were no material detractors from relative performance during the reporting period.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class R4 over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2364578.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">R4 without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.20<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.66<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.61<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg 1-3 Year U.S. Government/Credit Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">3.42<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.07<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.03<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> R4 without sales charge 0.0420 0.0266 0.0261 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 Bloomberg 1-3 Year U.S. Government/Credit Bond Index 0.0342 0.0207 0.0203 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/r4</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">3,352,561,328</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">2.9</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">396</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">2.1</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">11,048,122</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">50</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 3352561328 396 11048122 0.50 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">97.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit <br/>quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">12.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">11.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">18.6<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">31.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CCC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">22.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Federal Agencies</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.4<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.972 0.028 0.129 0.112 0.186 0.319 0.000 0.000 0.222 0.004 0.000 0.028 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Limited Maturity Fund This annual shareholder report contains important information about MFS Limited Maturity Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">R6</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>35</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">0.34<span>%</span></td> </tr> </table> 35 0.0034 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class R6 shares of the MFS Limited Maturity Fund (fund) provided a total return of <span style="white-space: nowrap;">4.28%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06%</span> for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg 1-3 Year U.S. Government/Credit Bond Index, generated a return of <span style="white-space: nowrap;">3.42%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg 1-3 Year U.S. Government/Credit Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's out-of-benchmark exposure to the collateralized mortgage obligation (CMO) sector strengthened relative performance. Security selection within the industrials sector also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, security selection within BBB-rated bonds benefited relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg 1-3 Year U.S. Government/Credit Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">There were no material detractors from relative performance during the reporting period.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class R6 over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2364672.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">R6 without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.28<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.73<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.64<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg 1-3 Year U.S. Government/Credit Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">3.42<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.07<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.03<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> R6 without sales charge 0.0428 0.0273 0.0264 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 Bloomberg 1-3 Year U.S. Government/Credit Bond Index 0.0342 0.0207 0.0203 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/r6</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">3,352,561,328</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">2.9</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">396</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">2.1</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">11,048,122</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">50</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 3352561328 396 11048122 0.50 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">97.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">12.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">11.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">18.6<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">31.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CCC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">22.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Federal Agencies</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.4<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.8<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.972 0.028 0.129 0.112 0.186 0.319 0.000 0.000 0.222 0.004 0.000 0.028 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Municipal LimitedMaturity Fund This annual shareholder report contains important information about MFS Municipal Limited Maturity Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>59</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">0.58<span>%</span></td> </tr> </table> 59 0.0058 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class A shares of the MFS Municipal Limited Maturity Fund (fund) provided a total return of <span style="white-space: nowrap;">4.95%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">6.34%</span> for the fund’s benchmark, the Bloomberg Municipal Bond Index. The fund's other benchmark, the Bloomberg 1-9 Year Municipal Bond Index, generated a return of <span style="white-space: nowrap;">4.91%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The municipal market produced positive returns over the trailing year, characterized by a supportive backdrop punctuated by bouts of volatility. Following a spike in April 2025, bond yield volatility generally trended lower through January of this year, providing a tailwind to returns. Additionally, the resumption of Fed rate cuts in late 2025 bolstered fixed income assets, including municipals. Volatility rose again in March of this year due to heightened geopolitical risks and related economic effects before returning to relatively low levels late in the period. Resilient inflows and generally solid credit fundamentals were key supports for the asset class. The benchmark index for this fund generated a return of 4.91% for the period. A positive for income-oriented investors, the yield (yield-to-worst) of the benchmark index ended the period at 3.03%, higher than the five-year average of 2.60%.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg 1-9 Year Municipal Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund’s overweight to the housing sector and underweight to general obligation bonds aided relative performance. Favorable security selection within both the transportation and education sectors also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, an overweight to BBB-rated and below investment grade bonds benefited relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg 1-9 Year Municipal Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's overweight to the 10 to 20-year segment of the yield curve detracted from relative returns as yields in that segment declined less than bonds with shorter maturities.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class A over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. This graph includes the deduction of the maximum applicable sales charge.</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2363450.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">A without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.95<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.49<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.94<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">A with initial sales charge (2.50%)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.33<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.98<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.69<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg Municipal Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">6.34<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.90<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.20<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg 1-9 Year Municipal Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.91<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.27<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.81<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> A without sales charge 0.0495 0.0149 0.0194 A with initial sales charge (2.50%) 0.0233 0.0098 0.0169 Bloomberg Municipal Bond Index 0.0634 0.0090 0.0220 Bloomberg 1-9 Year Municipal Bond Index 0.0491 0.0127 0.0181 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/a</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">3,116,903,553</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">5.2</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">1,069</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">3.7</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">9,561,990</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">26</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 3116903553 1069 9561990 0.26 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">96.4<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.6<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit <br/>quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">34.4<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">37.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">13.6<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.5<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.3<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">4.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.6<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.964 0.036 0.027 0.344 0.370 0.136 0.035 0.003 0.049 0.036 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Municipal LimitedMaturity Fund This annual shareholder report contains important information about MFS Municipal Limited Maturity Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>136</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">1.33<span>%</span></td> </tr> </table> 136 0.0133 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class B shares of the MFS Municipal Limited Maturity Fund (fund) provided a total return of <span style="white-space: nowrap;">4.04%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">6.34%</span> for the fund’s benchmark, the Bloomberg Municipal Bond Index. The fund's other benchmark, the Bloomberg 1-9 Year Municipal Bond Index, generated a return of <span style="white-space: nowrap;">4.91%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The municipal market produced positive returns over the trailing year, characterized by a supportive backdrop punctuated by bouts of volatility. Following a spike in April 2025, bond yield volatility generally trended lower through January of this year, providing a tailwind to returns. Additionally, the resumption of Fed rate cuts in late 2025 bolstered fixed income assets, including municipals. Volatility rose again in March of this year due to heightened geopolitical risks and related economic effects before returning to relatively low levels late in the period. Resilient inflows and generally solid credit fundamentals were key supports for the asset class. The benchmark index for this fund generated a return of 4.91% for the period. A positive for income-oriented investors, the yield (yield-to-worst) of the benchmark index ended the period at 3.03%, higher than the five-year average of 2.60%.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg 1-9 Year Municipal Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund’s overweight to the housing sector and underweight to general obligation bonds aided relative performance. Favorable security selection within both the transportation and education sectors also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, an overweight to BBB-rated and below investment grade bonds benefited relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg 1-9 Year Municipal Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's overweight to the 10 to 20-year segment of the yield curve detracted from relative returns as yields in that segment declined less than bonds with shorter maturities.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class B over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2363544.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">B without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.04<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.74<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.19<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">B with CDSC (declining over six years from 4% to 0%)<sup style="font-size: smaller; vertical-align: super;">×</sup></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.04<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.36<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.19<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg Municipal Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">6.34<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.90<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.20<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg 1-9 Year Municipal Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.91<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.27<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.81<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">×</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Assuming redemption at the end of the applicable period.</div> </td> </tr> </table> B without sales charge 0.0404 0.0074 0.0119 B with CDSC (declining over six years from 4% to 0%) 0.0004 0.0036 0.0119 Bloomberg Municipal Bond Index 0.0634 0.0090 0.0220 Bloomberg 1-9 Year Municipal Bond Index 0.0491 0.0127 0.0181 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/b</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">3,116,903,553</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">5.2</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">1,069</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">3.7</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">9,561,990</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">26</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 3116903553 1069 9561990 0.26 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">96.4<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.6<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit <br/>quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">34.4<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">37.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">13.6<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.5<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.3<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">4.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.6<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.964 0.036 0.027 0.344 0.370 0.136 0.035 0.003 0.049 0.036 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Municipal LimitedMaturity Fund This annual shareholder report contains important information about MFS Municipal Limited Maturity Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">C</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>146</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">1.43<span>%</span></td> </tr> </table> 146 0.0143 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class C shares of the MFS Municipal Limited Maturity Fund (fund) provided a total return of <span style="white-space: nowrap;">3.94%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">6.34%</span> for the fund’s benchmark, the Bloomberg Municipal Bond Index. The fund's other benchmark, the Bloomberg 1-9 Year Municipal Bond Index, generated a return of <span style="white-space: nowrap;">4.91%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The municipal market produced positive returns over the trailing year, characterized by a supportive backdrop punctuated by bouts of volatility. Following a spike in April 2025, bond yield volatility generally trended lower through January of this year, providing a tailwind to returns. Additionally, the resumption of Fed rate cuts in late 2025 bolstered fixed income assets, including municipals. Volatility rose again in March of this year due to heightened geopolitical risks and related economic effects before returning to relatively low levels late in the period. Resilient inflows and generally solid credit fundamentals were key supports for the asset class. The benchmark index for this fund generated a return of 4.91% for the period. A positive for income-oriented investors, the yield (yield-to-worst) of the benchmark index ended the period at 3.03%, higher than the five-year average of 2.60%.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg 1-9 Year Municipal Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund’s overweight to the housing sector and underweight to general obligation bonds aided relative performance. Favorable security selection within both the transportation and education sectors also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, an overweight to BBB-rated and below investment grade bonds benefited relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg 1-9 Year Municipal Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's overweight to the 10 to 20-year segment of the yield curve detracted from relative returns as yields in that segment declined less than bonds with shorter maturities.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class C over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2363638.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div><div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div><table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">C without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">3.94<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.61<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.07<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">C with CDSC (1% for 12 months)<sup style="font-size: smaller; vertical-align: super;">×</sup></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.94<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.61<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.07<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg Municipal Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">6.34<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.90<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.20<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg 1-9 Year Municipal Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.91<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.27<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.81<span>%</span></td> </tr> </table><table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">×</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Assuming redemption at the end of the applicable period.</div> </td> </tr> </table> C without sales charge 0.0394 0.0061 0.0107 C with CDSC (1% for 12 months) 0.0294 0.0061 0.0107 Bloomberg Municipal Bond Index 0.0634 0.0090 0.0220 Bloomberg 1-9 Year Municipal Bond Index 0.0491 0.0127 0.0181 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/c</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">3,116,903,553</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">5.2</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">1,069</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">3.7</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">9,561,990</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">26</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 3116903553 1069 9561990 0.26 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">96.4<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.6<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">34.4<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">37.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">13.6<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.5<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.3<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">4.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.6<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.964 0.036 0.027 0.344 0.370 0.136 0.035 0.003 0.049 0.036 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Municipal LimitedMaturity Fund This annual shareholder report contains important information about MFS Municipal Limited Maturity Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">I</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>44</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">0.43<span>%</span></td> </tr> </table> 44 0.0043 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class I shares of the MFS Municipal Limited Maturity Fund (fund) provided a total return of <span style="white-space: nowrap;">4.98%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">6.34%</span> for the fund’s benchmark, the Bloomberg Municipal Bond Index. The fund's other benchmark, the Bloomberg 1-9 Year Municipal Bond Index, generated a return of <span style="white-space: nowrap;">4.91%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The municipal market produced positive returns over the trailing year, characterized by a supportive backdrop punctuated by bouts of volatility. Following a spike in April 2025, bond yield volatility generally trended lower through January of this year, providing a tailwind to returns. Additionally, the resumption of Fed rate cuts in late 2025 bolstered fixed income assets, including municipals. Volatility rose again in March of this year due to heightened geopolitical risks and related economic effects before returning to relatively low levels late in the period. Resilient inflows and generally solid credit fundamentals were key supports for the asset class. The benchmark index for this fund generated a return of 4.91% for the period. A positive for income-oriented investors, the yield (yield-to-worst) of the benchmark index ended the period at 3.03%, higher than the five-year average of 2.60%.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg 1-9 Year Municipal Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund’s overweight to the housing sector and underweight to general obligation bonds aided relative performance. Favorable security selection within both the transportation and education sectors also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, an overweight to BBB-rated and below investment grade bonds benefited relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg 1-9 Year Municipal Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's overweight to the 10 to 20-year segment of the yield curve detracted from relative returns as yields in that segment declined less than bonds with shorter maturities.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class I over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2363732.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">I without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.98<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.61<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.09<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg Municipal Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">6.34<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.90<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.20<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg 1-9 Year Municipal Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.91<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.27<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.81<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> I without sales charge 0.0498 0.0161 0.0209 Bloomberg Municipal Bond Index 0.0634 0.0090 0.0220 Bloomberg 1-9 Year Municipal Bond Index 0.0491 0.0127 0.0181 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/i</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">3,116,903,553</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">5.2</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">1,069</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">3.7</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">9,561,990</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">26</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 3116903553 1069 9561990 0.26 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">96.4<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.6<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit <br/>quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">34.4<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">37.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">13.6<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.5<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.3<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">4.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.6<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.964 0.036 0.027 0.344 0.370 0.136 0.035 0.003 0.049 0.036 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Municipal LimitedMaturity Fund This annual shareholder report contains important information about MFS Municipal Limited Maturity Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">R6</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>37</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">0.36<span>%</span></td> </tr> </table> 37 0.0036 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class R6 shares of the MFS Municipal Limited Maturity Fund (fund) provided a total return of <span style="white-space: nowrap;">5.19%</span>, at net asset value. This compares with a return of <span style="white-space: nowrap;">6.34%</span> for the fund’s benchmark, the Bloomberg Municipal Bond Index. The fund's other benchmark, the Bloomberg 1-9 Year Municipal Bond Index, generated a return of <span style="white-space: nowrap;">4.91%</span>.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The municipal market produced positive returns over the trailing year, characterized by a supportive backdrop punctuated by bouts of volatility. Following a spike in April 2025, bond yield volatility generally trended lower through January of this year, providing a tailwind to returns. Additionally, the resumption of Fed rate cuts in late 2025 bolstered fixed income assets, including municipals. Volatility rose again in March of this year due to heightened geopolitical risks and related economic effects before returning to relatively low levels late in the period. Resilient inflows and generally solid credit fundamentals were key supports for the asset class. The benchmark index for this fund generated a return of 4.91% for the period. A positive for income-oriented investors, the yield (yield-to-worst) of the benchmark index ended the period at 3.03%, higher than the five-year average of 2.60%.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg 1-9 Year Municipal Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund’s overweight to the housing sector and underweight to general obligation bonds aided relative performance. Favorable security selection within both the transportation and education sectors also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, an overweight to BBB-rated and below investment grade bonds benefited relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg 1-9 Year Municipal Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's overweight to the 10 to 20-year segment of the yield curve detracted from relative returns as yields in that segment declined less than bonds with shorter maturities.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment*</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class R6 over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2363826.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> *For the period from the commencement of the class's investment operations, September 1, 2017 through April 30, 2026. The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">Life*</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">R6 without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">5.19<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.71<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.21<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg Municipal Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">6.34<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.90<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.20<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg 1-9 Year Municipal Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.91<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.27<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.85<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">*</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">For the period from the commencement of the class's investment operations, September 1, 2017 through April 30, 2026.</div> </td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> R6 without sales charge 0.0519 0.0171 0.0221 Bloomberg Municipal Bond Index 0.0634 0.0090 0.0220 Bloomberg 1-9 Year Municipal Bond Index 0.0491 0.0127 0.0185 2017-09-01 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/r6</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">3,116,903,553</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">5.2</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">1,069</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">3.7</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">9,561,990</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">26</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 3116903553 1069 9561990 0.26 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">96.4<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.6<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit <br/>quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">2.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">34.4<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">37.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">13.6<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.5<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.3<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">4.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">3.6<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.964 0.036 0.027 0.344 0.370 0.136 0.035 0.003 0.049 0.036 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Total Return Bond Fund This annual shareholder report contains important information about MFS Total Return Bond Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>61</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">0.60<span>%</span></td> </tr> </table> 61 0.0060 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class A shares of the MFS Total Return Bond Fund (fund) provided a total return of <span style="white-space: nowrap;">4.40</span>%, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06</span>% for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg U.S. Aggregate Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's underweight exposure to the treasury sector and out-of-benchmark exposure to the collateralized mortgage obligation (CMO) sector aided relative returns. Favorable security selection within the industrials sector also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, the fund’s out-of-benchmark exposure to BB-rated bonds benefited relative returns. Security selection within BBB-rated bonds was another positive factor for relative performance.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg U.S. Aggregate Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund’s underweight exposure to the mortgage backed securities (MBS) agency fixed rate sector weighed on relative performance. Not owning any securities within the government-related sovereign sector also held back relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class A over a ten year period or since inception, if shorter, in comparison to a broad measure of market performance. This graph includes the deduction of the maximum applicable sales charge.</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2364766.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of a broad measure of market performance over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">A without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.40<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.49<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.06<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">A with initial sales charge (4.25%)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">(0.03<span>)</span><span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">(0.38<span>)</span><span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.62<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> A without sales charge 0.0440 0.0049 0.0206 A with initial sales charge (4.25%) -0.0003 -0.0038 0.0162 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/a</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">8,274,986,056</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">7.4</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">1,074</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">5.8</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">28,761,662</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">48</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 8274986056 1074 28761662 0.48 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">98.5<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.5<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">13.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">7.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">10.8<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">22.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">4.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CCC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">24.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Federal Agencies</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">14.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.5<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.985 0.015 0.137 0.070 0.108 0.222 0.040 0.019 0.000 0.000 0.240 0.147 0.002 0.015 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Total Return Bond Fund This annual shareholder report contains important information about MFS Total Return Bond Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>137</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">1.35<span>%</span></td> </tr> </table> 137 0.0135 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class B shares of the MFS Total Return Bond Fund (fund) provided a total return of <span style="white-space: nowrap;">3.63</span>%, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06</span>% for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg U.S. Aggregate Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's underweight exposure to the treasury sector and out-of-benchmark exposure to the collateralized mortgage obligation (CMO) sector aided relative returns. Favorable security selection within the industrials sector also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, the fund’s out-of-benchmark exposure to BB-rated bonds benefited relative returns. Security selection within BBB-rated bonds was another positive factor for relative performance.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg U.S. Aggregate Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund’s underweight exposure to the mortgage backed securities (MBS) agency fixed rate sector weighed on relative performance. Not owning any securities within the government-related sovereign sector also held back relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class B over a ten year period or since inception, if shorter, in comparison to a broad measure of market performance.</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2364860.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div><div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of a broad measure of market performance over the same periods.</div><div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 0px;"> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">B without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">3.63<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">(0.26<span>)</span><span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.31<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">B with CDSC (declining over six years from 4% to 0%)<sup style="font-size: smaller; vertical-align: super;">×</sup></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">(0.37<span>)</span><span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">(0.60<span>)</span><span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.31<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">×</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Assuming redemption at the end of the applicable period.</div> </td> </tr> </table> </div> B without sales charge 0.0363 -0.0026 0.0131 B with CDSC (declining over six years from 4% to 0%) -0.0037 -0.0060 0.0131 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/b</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">8,274,986,056</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">7.4</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">1,074</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">5.8</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">28,761,662</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">48</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 8274986056 1074 28761662 0.48 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">98.5<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.5<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">13.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">7.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">10.8<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">22.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">4.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CCC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">24.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Federal Agencies</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">14.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.5<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.985 0.015 0.137 0.070 0.108 0.222 0.040 0.019 0.000 0.000 0.240 0.147 0.002 0.015 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Total Return Bond Fund This annual shareholder report contains important information about MFS Total Return Bond Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">C</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>148</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">1.45<span>%</span></td> </tr> </table> 148 0.0145 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class C shares of the MFS Total Return Bond Fund (fund) provided a total return of <span style="white-space: nowrap;">3.52</span>%, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06</span>% for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg U.S. Aggregate Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's underweight exposure to the treasury sector and out-of-benchmark exposure to the collateralized mortgage obligation (CMO) sector aided relative returns. Favorable security selection within the industrials sector also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, the fund’s out-of-benchmark exposure to BB-rated bonds benefited relative returns. Security selection within BBB-rated bonds was another positive factor for relative performance.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg U.S. Aggregate Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund’s underweight exposure to the mortgage backed securities (MBS) agency fixed rate sector weighed on relative performance. Not owning any securities within the government-related sovereign sector also held back relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class C over a ten year period or since inception, if shorter, in comparison to a broad measure of market performance.</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2364954.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of a broad measure of market performance over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">C without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">3.52<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">(0.36<span>)</span><span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.20<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">C with CDSC (1% for 12 months)<sup style="font-size: smaller; vertical-align: super;">×</sup></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.52<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">(0.36<span>)</span><span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.20<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">×</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Assuming redemption at the end of the applicable period.</div> </td> </tr> </table> C without sales charge 0.0352 -0.0036 0.0120 C with CDSC (1% for 12 months) 0.0252 -0.0036 0.0120 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/c</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div><table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">8,274,986,056</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">7.4</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">1,074</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">5.8</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">28,761,662</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">48</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table><div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div><div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 8274986056 1074 28761662 0.48 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">98.5<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.5<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">13.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">7.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">10.8<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">22.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">4.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CCC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">24.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Federal Agencies</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">14.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.5<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.985 0.015 0.137 0.070 0.108 0.222 0.040 0.019 0.000 0.000 0.240 0.147 0.002 0.015 Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change. MFS® Total Return Bond Fund This annual shareholder report contains important information about MFS Total Return Bond Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">I</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>46</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">0.45<span>%</span></td> </tr> </table> 46 0.0045 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class I shares of the MFS Total Return Bond Fund (fund) provided a total return of <span style="white-space: nowrap;">4.56</span>%, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06</span>% for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg U.S. Aggregate Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's underweight exposure to the treasury sector and out-of-benchmark exposure to the collateralized mortgage obligation (CMO) sector aided relative returns. Favorable security selection within the industrials sector also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, the fund’s out-of-benchmark exposure to BB-rated bonds benefited relative returns. Security selection within BBB-rated bonds was another positive factor for relative performance.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg U.S. Aggregate Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund’s underweight exposure to the mortgage backed securities (MBS) agency fixed rate sector weighed on relative performance. Not owning any securities within the government-related sovereign sector also held back relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class I over a ten year period or since inception, if shorter, in comparison to a broad measure of market performance.</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2365048.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of a broad measure of market performance over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">I without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.56<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.64<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.21<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> I without sales charge 0.0456 0.0064 0.0221 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/i</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div><table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">8,274,986,056</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">7.4</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">1,074</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">5.8</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">28,761,662</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">48</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table><div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div><div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 8274986056 1074 28761662 0.48 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div><div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div><table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">98.5<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.5<span>%</span></td> </tr> </table><div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit quality</b></div><table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">13.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">7.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">10.8<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">22.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">4.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CCC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">24.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Federal Agencies</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">14.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.5<span>%</span></td> </tr> </table><div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.985 0.015 0.137 0.070 0.108 0.222 0.040 0.019 0.000 0.000 0.240 0.147 0.002 0.015 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Total Return Bond Fund This annual shareholder report contains important information about MFS Total Return Bond Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">R1</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>148</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">1.45<span>%</span></td> </tr> </table> 148 0.0145 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class R1 shares of the MFS Total Return Bond Fund (fund) provided a total return of <span style="white-space: nowrap;">3.52</span>%, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06</span>% for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg U.S. Aggregate Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's underweight exposure to the treasury sector and out-of-benchmark exposure to the collateralized mortgage obligation (CMO) sector aided relative returns. Favorable security selection within the industrials sector also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, the fund’s out-of-benchmark exposure to BB-rated bonds benefited relative returns. Security selection within BBB-rated bonds was another positive factor for relative performance.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg U.S. Aggregate Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund’s underweight exposure to the mortgage backed securities (MBS) agency fixed rate sector weighed on relative performance. Not owning any securities within the government-related sovereign sector also held back relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class R1 over a ten year period or since inception, if shorter, in comparison to a broad measure of market performance.</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2365142.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of a broad measure of market performance over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">R1 without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">3.52<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">(0.34<span>)</span><span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.20<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> R1 without sales charge 0.0352 -0.0034 0.0120 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/r1</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div><table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">8,274,986,056</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">7.4</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">1,074</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">5.8</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">28,761,662</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">48</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table><div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div><div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 8274986056 1074 28761662 0.48 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">98.5<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.5<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">13.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">7.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">10.8<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">22.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">4.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CCC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">24.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Federal Agencies</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">14.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.5<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.985 0.015 0.137 0.070 0.108 0.222 0.040 0.019 0.000 0.000 0.240 0.147 0.002 0.015 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Total Return Bond Fund This annual shareholder report contains important information about MFS Total Return Bond Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">R2</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>97</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">0.95<span>%</span></td> </tr> </table> 97 0.0095 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class R2 shares of the MFS Total Return Bond Fund (fund) provided a total return of <span style="white-space: nowrap;">4.04</span>%, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06</span>% for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg U.S. Aggregate Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's underweight exposure to the treasury sector and out-of-benchmark exposure to the collateralized mortgage obligation (CMO) sector aided relative returns. Favorable security selection within the industrials sector also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, the fund’s out-of-benchmark exposure to BB-rated bonds benefited relative returns. Security selection within BBB-rated bonds was another positive factor for relative performance.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg U.S. Aggregate Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund’s underweight exposure to the mortgage backed securities (MBS) agency fixed rate sector weighed on relative performance. Not owning any securities within the government-related sovereign sector also held back relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class R2 over a ten year period or since inception, if shorter, in comparison to a broad measure of market performance.</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2365236.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of a broad measure of market performance over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">R2 without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.04<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.14<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.72<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> R2 without sales charge 0.0404 0.0014 0.0172 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/r2</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div><table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">8,274,986,056</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">7.4</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">1,074</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">5.8</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">28,761,662</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">48</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table><div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div><div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 8274986056 1074 28761662 0.48 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">98.5<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.5<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">13.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">7.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">10.8<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">22.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">4.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CCC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">24.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Federal Agencies</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">14.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.5<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.985 0.015 0.137 0.070 0.108 0.222 0.040 0.019 0.000 0.000 0.240 0.147 0.002 0.015 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Total Return Bond Fund This annual shareholder report contains important information about MFS Total Return Bond Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">R3</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>72</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">0.70<span>%</span></td> </tr> </table> 72 0.0070 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class R3 shares of the MFS Total Return Bond Fund (fund) provided a total return of <span style="white-space: nowrap;">4.30</span>%, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06</span>% for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg U.S. Aggregate Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's underweight exposure to the treasury sector and out-of-benchmark exposure to the collateralized mortgage obligation (CMO) sector aided relative returns. Favorable security selection within the industrials sector also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, the fund’s out-of-benchmark exposure to BB-rated bonds benefited relative returns. Security selection within BBB-rated bonds was another positive factor for relative performance.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg U.S. Aggregate Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund’s underweight exposure to the mortgage backed securities (MBS) agency fixed rate sector weighed on relative performance. Not owning any securities within the government-related sovereign sector also held back relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class R3 over a ten year period or since inception, if shorter, in comparison to a broad measure of market performance.</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2365330.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of a broad measure of market performance over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">R3 without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.30<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.39<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.96<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> R3 without sales charge 0.0430 0.0039 0.0196 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/r3</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">8,274,986,056</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">7.4</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">1,074</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">5.8</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">28,761,662</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">48</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 8274986056 1074 28761662 0.48 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">98.5<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.5<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">13.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">7.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">10.8<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">22.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">4.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CCC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">24.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Federal Agencies</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">14.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.5<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.985 0.015 0.137 0.070 0.108 0.222 0.040 0.019 0.000 0.000 0.240 0.147 0.002 0.015 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Total Return Bond Fund This annual shareholder report contains important information about MFS Total Return Bond Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">R4</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>46</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">0.45<span>%</span></td> </tr> </table> 46 0.0045 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class R4 shares of the MFS Total Return Bond Fund (fund) provided a total return of <span style="white-space: nowrap;">4.56</span>%, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06</span>% for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg U.S. Aggregate Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's underweight exposure to the treasury sector and out-of-benchmark exposure to the collateralized mortgage obligation (CMO) sector aided relative returns. Favorable security selection within the industrials sector also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, the fund’s out-of-benchmark exposure to BB-rated bonds benefited relative returns. Security selection within BBB-rated bonds was another positive factor for relative performance.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg U.S. Aggregate Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund’s underweight exposure to the mortgage backed securities (MBS) agency fixed rate sector weighed on relative performance. Not owning any securities within the government-related sovereign sector also held back relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class R4 over a ten year period or since inception, if shorter, in comparison to a broad measure of market performance.</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2365424.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of a broad measure of market performance over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">R4 without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.56<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.64<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.21<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> R4 without sales charge 0.0456 0.0064 0.0221 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/r4</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">8,274,986,056</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">7.4</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">1,074</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">5.8</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">28,761,662</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">48</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 8274986056 1074 28761662 0.48 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">98.5<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.5<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">13.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">7.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">10.8<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">22.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">4.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CCC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">24.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Federal Agencies</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">14.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.5<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.985 0.015 0.137 0.070 0.108 0.222 0.040 0.019 0.000 0.000 0.240 0.147 0.002 0.015 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> MFS® Total Return Bond Fund This annual shareholder report contains important information about MFS Total Return Bond Fund for the period of May 1, 2025 to April 30, 2026. annual shareholder report You can find additional information about the fund at <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;">funds.mfs.com</span>. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to orderliterature@mfs.com. funds.mfs.com 1‑800‑225‑2606 orderliterature@mfs.com <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND EXPENSES</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;">What were the fund costs for the last year?</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;">(based on a hypothetical $10,000 investment)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"></td> </tr> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Class Name</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">R6</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"><span style="float: none;">$</span>36</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;">0.35<span>%</span></td> </tr> </table> 36 0.0035 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;">MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">For the twelve months ended April 30, 2026, Class R6 shares of the MFS Total Return Bond Fund (fund) provided a total return of <span style="white-space: nowrap;">4.66</span>%, at net asset value. This compares with a return of <span style="white-space: nowrap;">4.06</span>% for the fund’s benchmark, the Bloomberg U.S. Aggregate Bond Index.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. A new geopolitical event distressed markets at the end of the period as US and Israeli forces launched strikes against Iran, disrupting Mideast oil and natural gas exports.<span style="white-space: nowrap;"> </span> During the period, a pro-growth tax and spending bill was signed into law in the US, while in Europe, renewed focus on defense and infrastructure spending brightened the economic outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs prior to the conflict in Iran. Optimism over artificial intelligence remained high.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. While the US Supreme Court struck down part of the Trump administration’s tariff strategy, the administration began deploying other authorities to largely replace the ones that were ruled unconstitutional.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Early in the period, moderating inflation pressures allowed many global central banks to ease monetary policy. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December before pausing.</div> </li> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">In fixed income markets, previously range-bound global bond yields spiked following the onset of the Middle East conflict, as energy-driven inflation fears appeared to have rattled bond investors. US rate volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index) similarly rose from intra-period lows, reflecting uncertainty around the scope and duration of the conflict and its implications for global growth. However, volatility later retracted as the risk of a broader regional military escalation appeared less likely. Global credit spreads widened only modestly before stabilizing near prior levels, supported by strong demand and resilient underlying fundamentals.</div> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top contributors to performance relative to the Bloomberg U.S. Aggregate Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund's underweight exposure to the treasury sector and out-of-benchmark exposure to the collateralized mortgage obligation (CMO) sector aided relative returns. Favorable security selection within the industrials sector also supported relative results.</div> </li> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">From a quality perspective, the fund’s out-of-benchmark exposure to BB-rated bonds benefited relative returns. Security selection within BBB-rated bonds was another positive factor for relative performance.</div> </li> </ul> </li> </ul> </div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"> <ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"> <li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">Top detractors from performance relative to the Bloomberg U.S. Aggregate Bond Index:</div> <ul style="break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"> <div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;">The fund’s underweight exposure to the mortgage backed securities (MBS) agency fixed rate sector weighed on relative performance. Not owning any securities within the government-related sovereign sector also held back relative returns.</div> </li> </ul> </li> </ul> </div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND PERFORMANCE</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"><b> <i>The fund’s past performance is not a good predictor of the fund’s future performance. </i> </b>The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Growth of a Hypothetical $10,000 Investment</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This graph shows the performance of a hypothetical $10,000 investment in Class R6 over a ten year period or since inception, if shorter, in comparison to a broad measure of market performance.</div> <div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"><img alt="Fund Performance - Growth of 10K" src="chartimages_2365518.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/> </div> The fund’s past performance is not a good predictor of the fund’s future performance. The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">Average Annual Total Returns through 4/30/26</div> <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of a broad measure of market performance over the same periods.</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">1-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">5-yr</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;">10-yr</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">R6 without sales charge</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.66<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.74<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">2.32<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;">Comparative Benchmark(s)</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">Bloomberg U.S. Aggregate Bond Index ∆</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">4.06<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">0.18<span>%</span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;">1.67<span>%</span></td> </tr> </table> <table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;">∆</div> </td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</div> </td> </tr> </table> R6 without sales charge 0.0466 0.0074 0.0232 Bloomberg U.S. Aggregate Bond Index 0.0406 0.0018 0.0167 <div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;">Visit <span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;">mfs.com/perf/r6</span> for more recent performance information.</div> <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">FUND STATISTICS AS OF 4/30/26</div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Net Assets ($):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">8,274,986,056</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Maturity (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">7.4</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Number of Holdings:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">1,074</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;">Average Effective Duration (yrs):</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;">5.8</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Total Management Fee ($)#:</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">28,761,662</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;">Portfolio Turnover Rate (%):</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;">48</td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> <td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"><i># </i> Includes the effect of any management fee waivers, if applicable.</div> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Where the fund holds derivatives, they are not included in the total number of portfolio holdings.</div> 8274986056 1074 28761662 0.48 <div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;">PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 4/30/26)</div> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Portfolio structure</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Fixed Income</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">98.5<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.5<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"><b>Composition including fixed income credit quality</b></div> <table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AAA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">13.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">AA</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">7.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">A</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">10.8<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BBB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">22.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">BB</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">4.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">B</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.9<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CCC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">CC</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">U.S. Government</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">24.0<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Federal Agencies</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">14.7<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Not Rated</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">0.2<span>%</span></td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;">Money Market Funds</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;">1.5<span>%</span></td> </tr> </table> <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> 0.985 0.015 0.137 0.070 0.108 0.222 0.040 0.019 0.000 0.000 0.240 0.147 0.002 0.015 <div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;">Ratings are assigned using Moody’s, Fitch, and Standard &amp; Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.</div> Source: FactSet Research Systems Inc. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Assuming redemption at the end of the applicable period. Includes the effect of any management fee waivers, if applicable. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Assuming redemption at the end of the applicable period. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Assuming redemption at the end of the applicable period. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Source: FactSet Research Systems Inc. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Assuming redemption at the end of the applicable period. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Assuming redemption at the end of the applicable period. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Includes the effect of any management fee waivers, if applicable. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. For the period from the commencement of the class's investment operations, September 1, 2017 through April 30, 2026. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Assuming redemption at the end of the applicable period. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Assuming redemption at the end of the applicable period. Assuming redemption at the end of the applicable period. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Source: FactSet Research Systems Inc. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Includes the effect of any management fee waivers, if applicable. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable. Source: FactSet Research Systems Inc. Includes the effect of any management fee waivers, if applicable.