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fmr:TH9Member 2026-08-31 0000795422 2025-08-31 2026-08-31 iso4217:USD pure shares N-CSR false 0000795422 N-1A Fidelity Advisor Series II 2026-08-31 Fidelity® Series Investment Grade Securitized Fund Fidelity® Series Investment Grade Securitized Fund FHPFX This annual shareholder report contains information about Fidelity® Series Investment Grade Securitized Fund for the period September 1, 2025 to August 31, 2026. annual shareholder report You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-8544. fundresearch.fidelity.com/prospectus/sec 1-800-544-8544 <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What were your Fund costs for the last year?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(based on hypothetical $10,000 investment)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">FUND COST (PREVIOUS YEAR)</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><table cellpadding="0" cellspacing="0" style="border-collapse:collapse;border-style:none;" width="100%"><tr><td style="width:51%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> </td> <td style="width:21%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs of a $10,000 investment</span></div> </td> <td style="width:27%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs paid as a percentage of a $10,000 investment </span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:51%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Series Investment Grade Securitized Fund</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:21%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"> </span>0<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span><span style="font-family:'Fidelity Sans';font-size:6px;color:#000000;font-style:normal;vertical-align:4px;font-weight:normal;">A</span></div> </td> <td style="width:27%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;">0.00<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span><span style="font-family:'Fidelity Sans';font-size:6px;color:#000000;font-style:normal;vertical-align:4px;font-weight:normal;">B</span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:6px;color:#000000;font-style:normal;vertical-align:4px;font-weight:normal;">A</span><span style="font-family:'Fidelity Sans Cd';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Amount represents less than $.50</span></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:6px;color:#000000;font-style:normal;vertical-align:4px;font-weight:normal;">B</span><span style="font-family:'Fidelity Sans Cd';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Amount represents less than 0.005%</span></div> <span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"></div> 0 0.0000 <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What affected the Fund's performance this period?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>U.S. taxable investment-grade bonds achieved a gain for the 12 months ending August 31, 2026, buoyed by three policy interest-rate cuts by the Federal Reserve in late 2025, but pulled down since then by rising bond yields amid higher consumer inflation, fast-growing government debt and heavy U.S. Treasury issuance.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Against this backdrop, the fund's overweight in select agency mortgage-backed securities that benefited from spread tightening contributed to performance versus the benchmark, the Bloomberg U.S. Securitized Index, for the fiscal year, including specified conventional mortgage pools with coupons of 2.5%, 6.0% and 6.5%, and Ginnie Mae securities with a coupon greater than 5.0%.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Non-benchmark holdings in residential mortgage-backed securities and asset-backed securities boosted relative performance.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Timely purchases and sales of interest-rate swaps were beneficial, as was a pay-fixed position in two-year interest-rate swaps.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>In contrast, an overweight in Ginnie Mae securities with a 2% coupon detracted from performance versus the benchmark the past 12 months, as did the fund's longer duration (interest rate) positioning.</span></div> <div style="text-align:left;text-align-last:auto;"></div> How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE August 17, 2018 through August 31, 2026. Initial investment of $10,000. Fidelity® Series Investment Grade Securitized Fund $10,000 $10,008 $10,791 $11,361 $11,397 $10,270 $10,093 $10,925 $11,332 Bloomberg U.S. Securitized Index $10,000 $10,016 $10,745 $11,241 $11,237 $10,145 $9,947 $10,698 $11,074 Bloomberg U.S. Aggregate Bond Index $10,000 $10,014 $11,033 $11,747 $11,737 $10,386 $10,262 $11,010 $11,356   2018 2019 2020 2021 2022 2023 2024 2025 2026   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Series Investment Grade Securitized Fund</span> 10000 10008 10791 11361 11397 10270 10093 10925 11332 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Securitized Index</span> 10000 10016 10745 11241 11237 10145 9947 10698 11074 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span> 10000 10014 11033 11747 11737 10386 10262 11010 11356 AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Fidelity® Series Investment Grade Securitized Fund 3.62% 0.60% 2.02% Bloomberg U.S. Securitized Index 2.98% 0.30% 1.65% Bloomberg U.S. Aggregate Bond Index 1.89% -0.29% 1.83% A   From August 17, 2018   Visit www.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. 0.0362 0.0060 0.0202 0.0298 0.0030 0.0165 0.0189 -0.0029 0.0183 2018-08-17 <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Visit </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">www.fidelity.com</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> for more recent performance information.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.</span> <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">Key Fund Statistics</span> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(as of August 31, 2026)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:right;text-align-last:auto;"><table cellpadding="0" cellspacing="1" style="border-collapse:separate;border-style:none;margin:auto;" width="100%"><tr><td style="width:63%; " valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">KEY FACTS</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> <span> </span></span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:32%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Fund Size</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>755,469,783</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Number of Holdings</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">1,444</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Total Advisory Fee</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>0</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="middle"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Portfolio Turnover</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">580<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 755469783 1444 0 5.80   U.S. Government and U.S. Government Agency Obligations 87.0 AAA 8.7 AA 0.4 A 0.0 BBB 0.0 BB 0.0 CCC,CC,C 0.1 Not Rated 22.8 QUALITY DIVERSIFICATION (% of Fund's net assets)     U.S. Government and U.S. Government Agency Obligations - 87.0   AAA - 8.7                                  AA - 0.4                                   A - 0.0                                    BBB - 0.0                                  BB - 0.0                                   CCC,CC,C - 0.1                             Not Rated - 22.8                         Short-Term Investments and Net Other Assets (Liabilities) - (19.0)%   We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes.         U.S. Government Agency - Mortgage Securities 83.2 CMOs and Other Mortgage Related Securities 24.9 Asset-Backed Securities 6.9 U.S. Treasury Obligations 3.8 Options 0.2 ASSET ALLOCATION (% of Fund's net assets)     U.S. Government Agency - Mortgage Securities - 83.2   CMOs and Other Mortgage Related Securities - 24.9   Asset-Backed Securities - 6.9              U.S. Treasury Obligations - 3.8            Options - 0.2                            Short-Term Investments and Net Other Assets (Liabilities) - (19.0)%   United States 100.0 Canada 0.0 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)     United States - 100.0                      Canada - 0.0                                   0.870 0.087 0.004 0.000 0.000 0.000 0.001 0.228 0.832 0.249 0.069 0.038 0.002 1.000 0.000 TOP HOLDINGS(% of Fund's net assets)     Fannie Mae Mortgage pass-thru certificates 27.1   Ginnie Mae II Pool 20.8   Freddie Mac Gold Pool 19.8   Freddie Mac Multifamily Structured pass-thru certificates 10.9   Uniform Mortgage Backed Securities 9.9   Fannie Mae Guaranteed REMIC 2.7   Ginnie Mae I Pool 2.3   Fannie Mae 2.3   US Treasury Notes 2.0   Freddie Mac Non Gold Pool 1.8     99.6   0.271 0.208 0.198 0.109 0.099 0.027 0.023 0.023 0.020 0.018 2026-08-31 Fidelity Advisor® Mortgage Securities Fund Fidelity® Mortgage Securities Fund FMSFX This annual shareholder report contains information about Fidelity Advisor® Mortgage Securities Fund for the period September 1, 2025 to August 31, 2026. annual shareholder report You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-8544 or by sending an e-mail to fidfunddocuments@fidelity.com. fundresearch.fidelity.com/prospectus/sec 1-800-544-8544 fidfunddocuments@fidelity.com <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What were your Fund costs for the last year?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(based on hypothetical $10,000 investment)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">FUND COST (PREVIOUS YEAR)</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><table cellpadding="0" cellspacing="0" style="border-collapse:collapse;border-style:none;" width="100%"><tr><td style="width:51%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> </td> <td style="width:21%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs of a $10,000 investment</span></div> </td> <td style="width:27%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs paid as a percentage of a $10,000 investment </span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:51%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Mortgage Securities Fund</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:21%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"> </span>46<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:27%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;">0.45<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 46 0.0045 <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What affected the Fund's performance this period?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>U.S. taxable investment-grade bonds achieved a gain for the 12 months ending August 31, 2026, buoyed by three policy interest-rate cuts by the Federal Reserve in late 2025, but pulled down since then by rising bond yields amid higher consumer inflation, fast-growing government debt and heavy U.S. Treasury issuance.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Against this backdrop, the fund's overweight in select agency mortgage-backed securities that benefited from spread tightening contributed to performance versus the benchmark, the Bloomberg U.S. MBS Index, for the fiscal year, including specified conventional mortgage pools with coupons of 2.5%, 6.0% and 6.5%, and Ginnie Mae securities with a coupon greater than 5.0%.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Non-benchmark holdings in residential mortgage-backed securities and asset-backed securities boosted relative performance.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Timely purchases and sales of interest-rate swaps were beneficial, as was a pay-fixed position in two-year interest-rate swaps.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>In contrast, an overweight in Ginnie Mae securities with a 2% coupon detracted from performance versus the benchmark the past 12 months, as did the fund's longer duration (interest rate) positioning.</span></div> <div style="text-align:left;text-align-last:auto;"></div> How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE August 31, 2016 through August 31, 2026. Initial investment of $10,000. Fidelity® Mortgage Securities Fund $10,000 $10,090 $10,002 $10,721 $11,240 $11,252 $10,117 $9,853 $10,611 $10,946 $11,280 Bloomberg U.S. MBS Index $10,000 $10,080 $10,027 $10,735 $11,222 $11,202 $10,112 $9,900 $10,639 $10,996 $11,328 Bloomberg U.S. Aggregate Bond Index $10,000 $10,049 $9,944 $10,955 $11,665 $11,655 $10,313 $10,189 $10,933 $11,276 $11,489   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Mortgage Securities Fund</span> 10000 10090 10002 10721 11240 11252 10117 9853 10611 10946 11280 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. MBS Index</span> 10000 10080 10027 10735 11222 11202 10112 9900 10639 10996 11328 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span> 10000 10049 9944 10955 11665 11655 10313 10189 10933 11276 11489 AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Fidelity® Mortgage Securities Fund 3.05% 0.05% 1.21% Bloomberg U.S. MBS Index 3.02% 0.22% 1.26% Bloomberg U.S. Aggregate Bond Index 1.89% -0.29% 1.40%     Visit www.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. 0.0305 0.0005 0.0121 0.0302 0.0022 0.0126 0.0189 -0.0029 0.0140 <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Visit </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">www.fidelity.com</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> for more recent performance information.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.</span> <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">Key Fund Statistics</span> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(as of August 31, 2026)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:right;text-align-last:auto;"><table cellpadding="0" cellspacing="1" style="border-collapse:separate;border-style:none;margin:auto;" width="100%"><tr><td style="width:63%; " valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">KEY FACTS</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> <span> </span></span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:32%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Fund Size</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>762,296,558</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Number of Holdings</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">1,804</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Total Advisory Fee</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>2,075,785</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="middle"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Portfolio Turnover</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">607<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 762296558 1804 2075785 6.07   U.S. Government and U.S. Government Agency Obligations 95.7 AAA 5.5 AA 0.6 A 0.0 BBB 0.1 BB 0.1 B 0.0 CCC,CC,C 0.0 Not Rated 17.9 QUALITY DIVERSIFICATION (% of Fund's net assets)     U.S. Government and U.S. Government Agency Obligations - 95.7   AAA - 5.5                                  AA - 0.6                                   A - 0.0                                    BBB - 0.1                                  BB - 0.1                                   B - 0.0                                    CCC,CC,C - 0.0                             Not Rated - 17.9                         Short-Term Investments and Net Other Assets (Liabilities) - (19.9)%   We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes.         U.S. Government Agency - Mortgage Securities 91.4 CMOs and Other Mortgage Related Securities 19.4 Asset-Backed Securities 4.6 U.S. Treasury Obligations 4.3 Options 0.2 ASSET ALLOCATION (% of Fund's net assets)     U.S. Government Agency - Mortgage Securities - 91.4   CMOs and Other Mortgage Related Securities - 19.4   Asset-Backed Securities - 4.6              U.S. Treasury Obligations - 4.3            Options - 0.2                            Short-Term Investments and Net Other Assets (Liabilities) - (19.9)%   United States 100.0 Canada 0.0 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)     United States - 100.0                      Canada - 0.0                                   0.957 0.055 0.006 0.000 0.001 0.001 0.000 0.000 0.179 0.914 0.194 0.046 0.043 0.002 1.000 0.000 TOP HOLDINGS(% of Fund's net assets)     Fannie Mae Mortgage pass-thru certificates 29.2   Freddie Mac Gold Pool 26.2   Ginnie Mae II Pool 20.3   Uniform Mortgage Backed Securities 10.1   Freddie Mac Multifamily Structured pass-thru certificates 7.4   Ginnie Mae I Pool 3.9   Fannie Mae Guaranteed REMIC 3.3   US Treasury Notes 2.6   US Treasury Bonds 1.7   Freddie Mac Non Gold Pool 1.2     105.9   0.292 0.262 0.203 0.101 0.074 0.039 0.033 0.026 0.017 0.012 2026-08-31 Fidelity Advisor® Mortgage Securities Fund Fidelity Advisor® Mortgage Securities Fund Class Z FIKUX This annual shareholder report contains information about Fidelity Advisor® Mortgage Securities Fund for the period September 1, 2025 to August 31, 2026. annual shareholder report You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. fundresearch.fidelity.com/prospectus/sec 1-877-208-0098 fidfunddocuments@fidelity.com <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What were your Fund costs for the last year?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(based on hypothetical $10,000 investment)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">FUND COST (PREVIOUS YEAR)</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><table cellpadding="0" cellspacing="0" style="border-collapse:collapse;border-style:none;" width="100%"><tr><td style="width:51%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> </td> <td style="width:21%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs of a $10,000 investment</span></div> </td> <td style="width:27%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs paid as a percentage of a $10,000 investment </span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:51%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">Class Z</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:21%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"> </span>37<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:27%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;">0.36<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 37 0.0036 <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What affected the Fund's performance this period?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>U.S. taxable investment-grade bonds achieved a gain for the 12 months ending August 31, 2026, buoyed by three policy interest-rate cuts by the Federal Reserve in late 2025, but pulled down since then by rising bond yields amid higher consumer inflation, fast-growing government debt and heavy U.S. Treasury issuance.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Against this backdrop, the fund's overweight in select agency mortgage-backed securities that benefited from spread tightening contributed to performance versus the benchmark, the Bloomberg U.S. MBS Index, for the fiscal year, including specified conventional mortgage pools with coupons of 2.5%, 6.0% and 6.5%, and Ginnie Mae securities with a coupon greater than 5.0%.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Non-benchmark holdings in residential mortgage-backed securities and asset-backed securities boosted relative performance.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Timely purchases and sales of interest-rate swaps were beneficial, as was a pay-fixed position in two-year interest-rate swaps.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>In contrast, an overweight in Ginnie Mae securities with a 2% coupon detracted from performance versus the benchmark the past 12 months, as did the fund's longer duration (interest rate) positioning.</span></div> <div style="text-align:left;text-align-last:auto;"></div> How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE October 2, 2018 through August 31, 2026. Initial investment of $10,000. Class Z $10,000 $10,782 $11,305 $11,333 $10,196 $9,948 $10,713 $11,061 $11,420 Bloomberg U.S. MBS Index $10,000 $10,771 $11,260 $11,240 $10,146 $9,934 $10,675 $11,034 $11,367 Bloomberg U.S. Aggregate Bond Index $10,000 $11,086 $11,804 $11,794 $10,436 $10,311 $11,064 $11,411 $11,626   2018 2019 2020 2021 2022 2023 2024 2025 2026   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class Z</span> 10000 10782 11305 11333 10196 9948 10713 11061 11420 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. MBS Index</span> 10000 10771 11260 11240 10146 9934 10675 11034 11367 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span> 10000 11086 11804 11794 10436 10311 11064 11411 11626 AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class Z 3.25% 0.15% 1.69% Bloomberg U.S. MBS Index 3.02% 0.22% 1.63% Bloomberg U.S. Aggregate Bond Index 1.89% -0.29% 1.92% A   From October 2, 2018   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. 0.0325 0.0015 0.0169 0.0302 0.0022 0.0163 0.0189 -0.0029 0.0192 2018-10-02 <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Visit </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">institutional.fidelity.com</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> for more recent performance information.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.</span> <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">Key Fund Statistics</span> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(as of August 31, 2026)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:right;text-align-last:auto;"><table cellpadding="0" cellspacing="1" style="border-collapse:separate;border-style:none;margin:auto;" width="100%"><tr><td style="width:63%; " valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">KEY FACTS</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> <span> </span></span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:32%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Fund Size</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>762,296,558</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Number of Holdings</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">1,804</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Total Advisory Fee</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>2,075,785</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="middle"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Portfolio Turnover</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">607<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 762296558 1804 2075785 6.07   U.S. Government and U.S. Government Agency Obligations 95.7 AAA 5.5 AA 0.6 A 0.0 BBB 0.1 BB 0.1 B 0.0 CCC,CC,C 0.0 Not Rated 17.9 QUALITY DIVERSIFICATION (% of Fund's net assets)     U.S. Government and U.S. Government Agency Obligations - 95.7   AAA - 5.5                                  AA - 0.6                                   A - 0.0                                    BBB - 0.1                                  BB - 0.1                                   B - 0.0                                    CCC,CC,C - 0.0                             Not Rated - 17.9                         Short-Term Investments and Net Other Assets (Liabilities) - (19.9)%   We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes.         U.S. Government Agency - Mortgage Securities 91.4 CMOs and Other Mortgage Related Securities 19.4 Asset-Backed Securities 4.6 U.S. Treasury Obligations 4.3 Options 0.2 ASSET ALLOCATION (% of Fund's net assets)     U.S. Government Agency - Mortgage Securities - 91.4   CMOs and Other Mortgage Related Securities - 19.4   Asset-Backed Securities - 4.6              U.S. Treasury Obligations - 4.3            Options - 0.2                            Short-Term Investments and Net Other Assets (Liabilities) - (19.9)%   United States 100.0 Canada 0.0 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)     United States - 100.0                      Canada - 0.0                                   0.957 0.055 0.006 0.000 0.001 0.001 0.000 0.000 0.179 0.914 0.194 0.046 0.043 0.002 1.000 0.000 TOP HOLDINGS(% of Fund's net assets)     Fannie Mae Mortgage pass-thru certificates 29.2   Freddie Mac Gold Pool 26.2   Ginnie Mae II Pool 20.3   Uniform Mortgage Backed Securities 10.1   Freddie Mac Multifamily Structured pass-thru certificates 7.4   Ginnie Mae I Pool 3.9   Fannie Mae Guaranteed REMIC 3.3   US Treasury Notes 2.6   US Treasury Bonds 1.7   Freddie Mac Non Gold Pool 1.2     105.9   0.292 0.262 0.203 0.101 0.074 0.039 0.033 0.026 0.017 0.012 2026-08-31 Fidelity Advisor® Mortgage Securities Fund Fidelity Advisor® Mortgage Securities Fund Class M FMSAX This annual shareholder report contains information about Fidelity Advisor® Mortgage Securities Fund for the period September 1, 2025 to August 31, 2026. annual shareholder report You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. fundresearch.fidelity.com/prospectus/sec 1-877-208-0098 fidfunddocuments@fidelity.com <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What were your Fund costs for the last year?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(based on hypothetical $10,000 investment)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">FUND COST (PREVIOUS YEAR)</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><table cellpadding="0" cellspacing="0" style="border-collapse:collapse;border-style:none;" width="100%"><tr><td style="width:51%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> </td> <td style="width:21%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs of a $10,000 investment</span></div> </td> <td style="width:27%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs paid as a percentage of a $10,000 investment </span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:51%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">Class M</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:21%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"> </span>82<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:27%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;">0.81<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 82 0.0081 <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What affected the Fund's performance this period?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>U.S. taxable investment-grade bonds achieved a gain for the 12 months ending August 31, 2026, buoyed by three policy interest-rate cuts by the Federal Reserve in late 2025, but pulled down since then by rising bond yields amid higher consumer inflation, fast-growing government debt and heavy U.S. Treasury issuance.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Against this backdrop, the fund's overweight in select agency mortgage-backed securities that benefited from spread tightening contributed to performance versus the benchmark, the Bloomberg U.S. MBS Index, for the fiscal year, including specified conventional mortgage pools with coupons of 2.5%, 6.0% and 6.5%, and Ginnie Mae securities with a coupon greater than 5.0%.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Non-benchmark holdings in residential mortgage-backed securities and asset-backed securities boosted relative performance.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Timely purchases and sales of interest-rate swaps were beneficial, as was a pay-fixed position in two-year interest-rate swaps.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>In contrast, an overweight in Ginnie Mae securities with a 2% coupon detracted from performance versus the benchmark the past 12 months, as did the fund's longer duration (interest rate) positioning.</span></div> <div style="text-align:left;text-align-last:auto;"></div> How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE August 31, 2016 through August 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class M $9,600 $9,653 $9,544 $10,193 $10,640 $10,621 $9,508 $9,237 $9,904 $10,179 $10,463 Bloomberg U.S. MBS Index $10,000 $10,080 $10,027 $10,735 $11,222 $11,202 $10,112 $9,900 $10,639 $10,996 $11,328 Bloomberg U.S. Aggregate Bond Index $10,000 $10,049 $9,944 $10,955 $11,665 $11,655 $10,313 $10,189 $10,933 $11,276 $11,489   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class M</span> 9600 9653 9544 10193 10640 10621 9508 9237 9904 10179 10463 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. MBS Index</span> 10000 10080 10027 10735 11222 11202 10112 9900 10639 10996 11328 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span> 10000 10049 9944 10955 11665 11655 10313 10189 10933 11276 11489 AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class M (incl. 4.00% sales charge)   -1.33% -1.11% 0.45% Class M (without 4.00% sales charge) 2.78% -0.30% 0.86% Bloomberg U.S. MBS Index 3.02% 0.22% 1.26% Bloomberg U.S. Aggregate Bond Index 1.89% -0.29% 1.40%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. -0.0133 -0.0111 0.0045 0.0278 -0.0030 0.0086 0.0302 0.0022 0.0126 0.0189 -0.0029 0.0140 <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Visit </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">institutional.fidelity.com</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> for more recent performance information.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.</span> <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">Key Fund Statistics</span> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(as of August 31, 2026)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:right;text-align-last:auto;"><table cellpadding="0" cellspacing="1" style="border-collapse:separate;border-style:none;margin:auto;" width="100%"><tr><td style="width:63%; " valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">KEY FACTS</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> <span> </span></span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:32%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Fund Size</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>762,296,558</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Number of Holdings</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">1,804</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Total Advisory Fee</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>2,075,785</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="middle"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Portfolio Turnover</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">607<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 762296558 1804 2075785 6.07   U.S. Government and U.S. Government Agency Obligations 95.7 AAA 5.5 AA 0.6 A 0.0 BBB 0.1 BB 0.1 B 0.0 CCC,CC,C 0.0 Not Rated 17.9 QUALITY DIVERSIFICATION (% of Fund's net assets)     U.S. Government and U.S. Government Agency Obligations - 95.7   AAA - 5.5                                  AA - 0.6                                   A - 0.0                                    BBB - 0.1                                  BB - 0.1                                   B - 0.0                                    CCC,CC,C - 0.0                             Not Rated - 17.9                         Short-Term Investments and Net Other Assets (Liabilities) - (19.9)%   We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes.         U.S. Government Agency - Mortgage Securities 91.4 CMOs and Other Mortgage Related Securities 19.4 Asset-Backed Securities 4.6 U.S. Treasury Obligations 4.3 Options 0.2 ASSET ALLOCATION (% of Fund's net assets)     U.S. Government Agency - Mortgage Securities - 91.4   CMOs and Other Mortgage Related Securities - 19.4   Asset-Backed Securities - 4.6              U.S. Treasury Obligations - 4.3            Options - 0.2                            Short-Term Investments and Net Other Assets (Liabilities) - (19.9)%   United States 100.0 Canada 0.0 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)     United States - 100.0                      Canada - 0.0                                   0.957 0.055 0.006 0.000 0.001 0.001 0.000 0.000 0.179 0.914 0.194 0.046 0.043 0.002 1.000 0.000 TOP HOLDINGS(% of Fund's net assets)     Fannie Mae Mortgage pass-thru certificates 29.2   Freddie Mac Gold Pool 26.2   Ginnie Mae II Pool 20.3   Uniform Mortgage Backed Securities 10.1   Freddie Mac Multifamily Structured pass-thru certificates 7.4   Ginnie Mae I Pool 3.9   Fannie Mae Guaranteed REMIC 3.3   US Treasury Notes 2.6   US Treasury Bonds 1.7   Freddie Mac Non Gold Pool 1.2     105.9   0.292 0.262 0.203 0.101 0.074 0.039 0.033 0.026 0.017 0.012 2026-08-31 Fidelity Advisor® Mortgage Securities Fund Fidelity Advisor® Mortgage Securities Fund Class I FMSCX This annual shareholder report contains information about Fidelity Advisor® Mortgage Securities Fund for the period September 1, 2025 to August 31, 2026. annual shareholder report You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. fundresearch.fidelity.com/prospectus/sec 1-877-208-0098 fidfunddocuments@fidelity.com <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What were your Fund costs for the last year?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(based on hypothetical $10,000 investment)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">FUND COST (PREVIOUS YEAR)</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><table cellpadding="0" cellspacing="0" style="border-collapse:collapse;border-style:none;" width="100%"><tr><td style="width:51%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> </td> <td style="width:21%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs of a $10,000 investment</span></div> </td> <td style="width:27%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs paid as a percentage of a $10,000 investment </span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:51%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">Class I</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:21%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"> </span>61<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:27%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;">0.60<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 61 0.0060 <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What affected the Fund's performance this period?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>U.S. taxable investment-grade bonds achieved a gain for the 12 months ending August 31, 2026, buoyed by three policy interest-rate cuts by the Federal Reserve in late 2025, but pulled down since then by rising bond yields amid higher consumer inflation, fast-growing government debt and heavy U.S. Treasury issuance.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Against this backdrop, the fund's overweight in select agency mortgage-backed securities that benefited from spread tightening contributed to performance versus the benchmark, the Bloomberg U.S. MBS Index, for the fiscal year, including specified conventional mortgage pools with coupons of 2.5%, 6.0% and 6.5%, and Ginnie Mae securities with a coupon greater than 5.0%.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Non-benchmark holdings in residential mortgage-backed securities and asset-backed securities boosted relative performance.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Timely purchases and sales of interest-rate swaps were beneficial, as was a pay-fixed position in two-year interest-rate swaps.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>In contrast, an overweight in Ginnie Mae securities with a 2% coupon detracted from performance versus the benchmark the past 12 months, as did the fund's longer duration (interest rate) positioning.</span></div> <div style="text-align:left;text-align-last:auto;"></div> How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE August 31, 2016 through August 31, 2026. Initial investment of $10,000. Class I $10,000 $10,076 $9,993 $10,709 $11,215 $11,232 $10,089 $9,817 $10,565 $10,882 $11,197 Bloomberg U.S. MBS Index $10,000 $10,080 $10,027 $10,735 $11,222 $11,202 $10,112 $9,900 $10,639 $10,996 $11,328 Bloomberg U.S. Aggregate Bond Index $10,000 $10,049 $9,944 $10,955 $11,665 $11,655 $10,313 $10,189 $10,933 $11,276 $11,489   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class I</span> 10000 10076 9993 10709 11215 11232 10089 9817 10565 10882 11197 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. MBS Index</span> 10000 10080 10027 10735 11222 11202 10112 9900 10639 10996 11328 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span> 10000 10049 9944 10955 11665 11655 10313 10189 10933 11276 11489 AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class I 2.89% -0.06% 1.14% Bloomberg U.S. MBS Index 3.02% 0.22% 1.26% Bloomberg U.S. Aggregate Bond Index 1.89% -0.29% 1.40%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. 0.0289 -0.0006 0.0114 0.0302 0.0022 0.0126 0.0189 -0.0029 0.0140 <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Visit </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">institutional.fidelity.com</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> for more recent performance information.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.</span> <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">Key Fund Statistics</span> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(as of August 31, 2026)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:right;text-align-last:auto;"><table cellpadding="0" cellspacing="1" style="border-collapse:separate;border-style:none;margin:auto;" width="100%"><tr><td style="width:63%; " valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">KEY FACTS</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> <span> </span></span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:32%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Fund Size</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>762,296,558</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Number of Holdings</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">1,804</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Total Advisory Fee</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>2,075,785</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="middle"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Portfolio Turnover</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">607<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 762296558 1804 2075785 6.07   U.S. Government and U.S. Government Agency Obligations 95.7 AAA 5.5 AA 0.6 A 0.0 BBB 0.1 BB 0.1 B 0.0 CCC,CC,C 0.0 Not Rated 17.9 QUALITY DIVERSIFICATION (% of Fund's net assets)     U.S. Government and U.S. Government Agency Obligations - 95.7   AAA - 5.5                                  AA - 0.6                                   A - 0.0                                    BBB - 0.1                                  BB - 0.1                                   B - 0.0                                    CCC,CC,C - 0.0                             Not Rated - 17.9                         Short-Term Investments and Net Other Assets (Liabilities) - (19.9)%   We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes.         U.S. Government Agency - Mortgage Securities 91.4 CMOs and Other Mortgage Related Securities 19.4 Asset-Backed Securities 4.6 U.S. Treasury Obligations 4.3 Options 0.2 ASSET ALLOCATION (% of Fund's net assets)     U.S. Government Agency - Mortgage Securities - 91.4   CMOs and Other Mortgage Related Securities - 19.4   Asset-Backed Securities - 4.6              U.S. Treasury Obligations - 4.3            Options - 0.2                            Short-Term Investments and Net Other Assets (Liabilities) - (19.9)%   United States 100.0 Canada 0.0 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)     United States - 100.0                      Canada - 0.0                                   0.957 0.055 0.006 0.000 0.001 0.001 0.000 0.000 0.179 0.914 0.194 0.046 0.043 0.002 1.000 0.000 TOP HOLDINGS(% of Fund's net assets)     Fannie Mae Mortgage pass-thru certificates 29.2   Freddie Mac Gold Pool 26.2   Ginnie Mae II Pool 20.3   Uniform Mortgage Backed Securities 10.1   Freddie Mac Multifamily Structured pass-thru certificates 7.4   Ginnie Mae I Pool 3.9   Fannie Mae Guaranteed REMIC 3.3   US Treasury Notes 2.6   US Treasury Bonds 1.7   Freddie Mac Non Gold Pool 1.2     105.9   0.292 0.262 0.203 0.101 0.074 0.039 0.033 0.026 0.017 0.012 2026-08-31 Fidelity Advisor® Mortgage Securities Fund Fidelity Advisor® Mortgage Securities Fund Class C FOMCX This annual shareholder report contains information about Fidelity Advisor® Mortgage Securities Fund for the period September 1, 2025 to August 31, 2026. annual shareholder report You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. fundresearch.fidelity.com/prospectus/sec 1-877-208-0098 fidfunddocuments@fidelity.com <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What were your Fund costs for the last year?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(based on hypothetical $10,000 investment)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">FUND COST (PREVIOUS YEAR)</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><table cellpadding="0" cellspacing="0" style="border-collapse:collapse;border-style:none;" width="100%"><tr><td style="width:51%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> </td> <td style="width:21%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs of a $10,000 investment</span></div> </td> <td style="width:27%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs paid as a percentage of a $10,000 investment </span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:51%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">Class C</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:21%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"> </span>162<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:27%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;">1.60<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 162 0.0160 <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What affected the Fund's performance this period?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>U.S. taxable investment-grade bonds achieved a gain for the 12 months ending August 31, 2026, buoyed by three policy interest-rate cuts by the Federal Reserve in late 2025, but pulled down since then by rising bond yields amid higher consumer inflation, fast-growing government debt and heavy U.S. Treasury issuance.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Against this backdrop, the fund's overweight in select agency mortgage-backed securities that benefited from spread tightening contributed to performance versus the benchmark, the Bloomberg U.S. MBS Index, for the fiscal year, including specified conventional mortgage pools with coupons of 2.5%, 6.0% and 6.5%, and Ginnie Mae securities with a coupon greater than 5.0%.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Non-benchmark holdings in residential mortgage-backed securities and asset-backed securities boosted relative performance.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Timely purchases and sales of interest-rate swaps were beneficial, as was a pay-fixed position in two-year interest-rate swaps.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>In contrast, an overweight in Ginnie Mae securities with a 2% coupon detracted from performance versus the benchmark the past 12 months, as did the fund's longer duration (interest rate) positioning.</span></div> <div style="text-align:left;text-align-last:auto;"></div> How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE August 31, 2016 through August 31, 2026. Initial investment of $10,000. Class C $10,000 $9,981 $9,795 $10,387 $10,759 $10,657 $9,462 $9,122 $9,707 $9,977 $10,256 Bloomberg U.S. MBS Index $10,000 $10,080 $10,027 $10,735 $11,222 $11,202 $10,112 $9,900 $10,639 $10,996 $11,328 Bloomberg U.S. Aggregate Bond Index $10,000 $10,049 $9,944 $10,955 $11,665 $11,655 $10,313 $10,189 $10,933 $11,276 $11,489   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class C</span> 10000 9981 9795 10387 10759 10657 9462 9122 9707 9977 10256 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. MBS Index</span> 10000 10080 10027 10735 11222 11202 10112 9900 10639 10996 11328 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span> 10000 10049 9944 10955 11665 11655 10313 10189 10933 11276 11489 AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class C  (incl. contingent deferred sales charge) 0.98% -1.10% 0.25% Class C 1.97% -1.10% 0.25% Bloomberg U.S. MBS Index 3.02% 0.22% 1.26% Bloomberg U.S. Aggregate Bond Index 1.89% -0.29% 1.40%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. 0.0098 -0.0110 0.0025 0.0197 -0.0110 0.0025 0.0302 0.0022 0.0126 0.0189 -0.0029 0.0140 <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Visit </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">institutional.fidelity.com</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> for more recent performance information.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.</span> <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">Key Fund Statistics</span> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(as of August 31, 2026)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:right;text-align-last:auto;"><table cellpadding="0" cellspacing="1" style="border-collapse:separate;border-style:none;margin:auto;" width="100%"><tr><td style="width:63%; " valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">KEY FACTS</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> <span> </span></span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:32%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Fund Size</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>762,296,558</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Number of Holdings</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">1,804</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Total Advisory Fee</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>2,075,785</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="middle"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Portfolio Turnover</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">607<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 762296558 1804 2075785 6.07   U.S. Government and U.S. Government Agency Obligations 95.7 AAA 5.5 AA 0.6 A 0.0 BBB 0.1 BB 0.1 B 0.0 CCC,CC,C 0.0 Not Rated 17.9 QUALITY DIVERSIFICATION (% of Fund's net assets)     U.S. Government and U.S. Government Agency Obligations - 95.7   AAA - 5.5                                  AA - 0.6                                   A - 0.0                                    BBB - 0.1                                  BB - 0.1                                   B - 0.0                                    CCC,CC,C - 0.0                             Not Rated - 17.9                         Short-Term Investments and Net Other Assets (Liabilities) - (19.9)%   We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes.         U.S. Government Agency - Mortgage Securities 91.4 CMOs and Other Mortgage Related Securities 19.4 Asset-Backed Securities 4.6 U.S. Treasury Obligations 4.3 Options 0.2 ASSET ALLOCATION (% of Fund's net assets)     U.S. Government Agency - Mortgage Securities - 91.4   CMOs and Other Mortgage Related Securities - 19.4   Asset-Backed Securities - 4.6              U.S. Treasury Obligations - 4.3            Options - 0.2                            Short-Term Investments and Net Other Assets (Liabilities) - (19.9)%   United States 100.0 Canada 0.0 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)     United States - 100.0                      Canada - 0.0                                   0.957 0.055 0.006 0.000 0.001 0.001 0.000 0.000 0.179 0.914 0.194 0.046 0.043 0.002 1.000 0.000 TOP HOLDINGS(% of Fund's net assets)     Fannie Mae Mortgage pass-thru certificates 29.2   Freddie Mac Gold Pool 26.2   Ginnie Mae II Pool 20.3   Uniform Mortgage Backed Securities 10.1   Freddie Mac Multifamily Structured pass-thru certificates 7.4   Ginnie Mae I Pool 3.9   Fannie Mae Guaranteed REMIC 3.3   US Treasury Notes 2.6   US Treasury Bonds 1.7   Freddie Mac Non Gold Pool 1.2     105.9   0.292 0.262 0.203 0.101 0.074 0.039 0.033 0.026 0.017 0.012 2026-08-31 Fidelity Advisor® Mortgage Securities Fund Fidelity Advisor® Mortgage Securities Fund Class A FMGAX This annual shareholder report contains information about Fidelity Advisor® Mortgage Securities Fund for the period September 1, 2025 to August 31, 2026. annual shareholder report You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. fundresearch.fidelity.com/prospectus/sec 1-877-208-0098 fidfunddocuments@fidelity.com <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What were your Fund costs for the last year?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(based on hypothetical $10,000 investment)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">FUND COST (PREVIOUS YEAR)</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><table cellpadding="0" cellspacing="0" style="border-collapse:collapse;border-style:none;" width="100%"><tr><td style="width:51%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> </td> <td style="width:21%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs of a $10,000 investment</span></div> </td> <td style="width:27%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs paid as a percentage of a $10,000 investment </span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:51%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">Class A</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:21%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"> </span>80<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:27%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;">0.79<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 80 0.0079 <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What affected the Fund's performance this period?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>U.S. taxable investment-grade bonds achieved a gain for the 12 months ending August 31, 2026, buoyed by three policy interest-rate cuts by the Federal Reserve in late 2025, but pulled down since then by rising bond yields amid higher consumer inflation, fast-growing government debt and heavy U.S. Treasury issuance.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Against this backdrop, the fund's overweight in select agency mortgage-backed securities that benefited from spread tightening contributed to performance versus the benchmark, the Bloomberg U.S. MBS Index, for the fiscal year, including specified conventional mortgage pools with coupons of 2.5%, 6.0% and 6.5%, and Ginnie Mae securities with a coupon greater than 5.0%.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Non-benchmark holdings in residential mortgage-backed securities and asset-backed securities boosted relative performance.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Timely purchases and sales of interest-rate swaps were beneficial, as was a pay-fixed position in two-year interest-rate swaps.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>In contrast, an overweight in Ginnie Mae securities with a 2% coupon detracted from performance versus the benchmark the past 12 months, as did the fund's longer duration (interest rate) positioning.</span></div> <div style="text-align:left;text-align-last:auto;"></div> How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE August 31, 2016 through August 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class A $9,600 $9,653 $9,545 $10,187 $10,644 $10,616 $9,510 $9,236 $9,904 $10,179 $10,464 Bloomberg U.S. MBS Index $10,000 $10,080 $10,027 $10,735 $11,222 $11,202 $10,112 $9,900 $10,639 $10,996 $11,328 Bloomberg U.S. Aggregate Bond Index $10,000 $10,049 $9,944 $10,955 $11,665 $11,655 $10,313 $10,189 $10,933 $11,276 $11,489   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class A</span> 9600 9653 9545 10187 10644 10616 9510 9236 9904 10179 10464 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. MBS Index</span> 10000 10080 10027 10735 11222 11202 10112 9900 10639 10996 11328 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span> 10000 10049 9944 10955 11665 11655 10313 10189 10933 11276 11489 AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class A (incl. 4.00% sales charge)   -1.32% -1.10% 0.45% Class A (without 4.00% sales charge) 2.79% -0.29% 0.87% Bloomberg U.S. MBS Index 3.02% 0.22% 1.26% Bloomberg U.S. Aggregate Bond Index 1.89% -0.29% 1.40%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. -0.0132 -0.0110 0.0045 0.0279 -0.0029 0.0087 0.0302 0.0022 0.0126 0.0189 -0.0029 0.0140 <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Visit </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">institutional.fidelity.com</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> for more recent performance information.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.</span> <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">Key Fund Statistics</span> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(as of August 31, 2026)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:right;text-align-last:auto;"><table cellpadding="0" cellspacing="1" style="border-collapse:separate;border-style:none;margin:auto;" width="100%"><tr><td style="width:63%; " valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">KEY FACTS</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> <span> </span></span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:32%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Fund Size</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>762,296,558</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Number of Holdings</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">1,804</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Total Advisory Fee</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>2,075,785</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="middle"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Portfolio Turnover</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">607<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 762296558 1804 2075785 6.07   U.S. Government and U.S. Government Agency Obligations 95.7 AAA 5.5 AA 0.6 A 0.0 BBB 0.1 BB 0.1 B 0.0 CCC,CC,C 0.0 Not Rated 17.9 QUALITY DIVERSIFICATION (% of Fund's net assets)     U.S. Government and U.S. Government Agency Obligations - 95.7   AAA - 5.5                                  AA - 0.6                                   A - 0.0                                    BBB - 0.1                                  BB - 0.1                                   B - 0.0                                    CCC,CC,C - 0.0                             Not Rated - 17.9                         Short-Term Investments and Net Other Assets (Liabilities) - (19.9)%   We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes.         U.S. Government Agency - Mortgage Securities 91.4 CMOs and Other Mortgage Related Securities 19.4 Asset-Backed Securities 4.6 U.S. Treasury Obligations 4.3 Options 0.2 ASSET ALLOCATION (% of Fund's net assets)     U.S. Government Agency - Mortgage Securities - 91.4   CMOs and Other Mortgage Related Securities - 19.4   Asset-Backed Securities - 4.6              U.S. Treasury Obligations - 4.3            Options - 0.2                            Short-Term Investments and Net Other Assets (Liabilities) - (19.9)%   United States 100.0 Canada 0.0 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)     United States - 100.0                      Canada - 0.0                                   0.957 0.055 0.006 0.000 0.001 0.001 0.000 0.000 0.179 0.914 0.194 0.046 0.043 0.002 1.000 0.000 TOP HOLDINGS(% of Fund's net assets)     Fannie Mae Mortgage pass-thru certificates 29.2   Freddie Mac Gold Pool 26.2   Ginnie Mae II Pool 20.3   Uniform Mortgage Backed Securities 10.1   Freddie Mac Multifamily Structured pass-thru certificates 7.4   Ginnie Mae I Pool 3.9   Fannie Mae Guaranteed REMIC 3.3   US Treasury Notes 2.6   US Treasury Bonds 1.7   Freddie Mac Non Gold Pool 1.2     105.9   0.292 0.262 0.203 0.101 0.074 0.039 0.033 0.026 0.017 0.012 2026-08-31 Fidelity Advisor® Limited Term Bond Fund Fidelity® Limited Term Bond Fund FJRLX This annual shareholder report contains information about Fidelity Advisor® Limited Term Bond Fund for the period September 1, 2025 to August 31, 2026. annual shareholder report You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-8544 or by sending an e-mail to fidfunddocuments@fidelity.com. fundresearch.fidelity.com/prospectus/sec 1-800-544-8544 fidfunddocuments@fidelity.com <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What were your Fund costs for the last year?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(based on hypothetical $10,000 investment)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">FUND COST (PREVIOUS YEAR)</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><table cellpadding="0" cellspacing="0" style="border-collapse:collapse;border-style:none;" width="100%"><tr><td style="width:51%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> </td> <td style="width:21%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs of a $10,000 investment</span></div> </td> <td style="width:27%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs paid as a percentage of a $10,000 investment </span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:51%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Limited Term Bond Fund</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:21%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"> </span>30<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:27%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;">0.30<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 30 0.0030 <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What affected the Fund's performance this period?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>U.S. taxable investment-grade bonds achieved a gain for the 12 months ending August 31, 2026, buoyed by three policy interest-rate cuts by the Federal Reserve in late 2025, but pulled down since then by rising bond yields amid higher consumer inflation, a resilient economy and heavy U.S. Treasury issuance. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Against this backdrop, the fund's strategy of favoring limited-term corporate bonds, while underweighting similar-duration U.S. Treasurys, contributed to its performance versus the Composite index for the fiscal year. Within corporates, debt holdings among financial institutions, especially banks, and industrial firms, particularly in the consumer cyclical segment, added value. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Non-Composite exposure to asset-backed securities, including collateralized loan obligations and car loan debt, also helped, as did an out-of-index allocation to commercial mortgage-backed securities. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>In contrast, the fund's yield-curve positioning, including the underweighting of the two-year key rate in favor of positions farther out on the curve, modestly detracted from relative performance. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>At period end, corporates made up 71% of fund assets, roughly equal to the Composite index and notably overweight versus the Bloomberg 1-5 year benchmark. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Exposure to U.S. Treasurys stood at about 15% as of August 31, compared with roughly 69% for the Bloomberg benchmark and 20% for the Composite index, while out-of-index exposure to ABS closed the fiscal year at about 9% of fund assets.  </span></div> <div style="text-align:left;text-align-last:auto;"></div> How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE August 31, 2016 through August 31, 2026. Initial investment of $10,000. Fidelity® Limited Term Bond Fund $10,000 $10,140 $10,130 $10,742 $11,265 $11,344 $10,613 $10,864 $11,711 $12,363 $12,698 Fidelity Limited Term Composite Index℠ $10,000 $10,153 $10,139 $10,788 $11,331 $11,437 $10,748 $10,943 $11,766 $12,411 $12,758 Bloomberg U.S. 1-5 Year Government/Credit Bond Index $10,000 $10,093 $10,049 $10,648 $11,151 $11,188 $10,534 $10,659 $11,370 $11,914 $12,170 Bloomberg U.S. Aggregate Bond Index $10,000 $10,049 $9,944 $10,955 $11,665 $11,655 $10,313 $10,189 $10,933 $11,276 $11,489   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Limited Term Bond Fund</span> 10000 10140 10130 10742 11265 11344 10613 10864 11711 12363 12698 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Limited Term Composite Index℠</span> 10000 10153 10139 10788 11331 11437 10748 10943 11766 12411 12758 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. 1-5 Year Government/Credit Bond Index</span> 10000 10093 10049 10648 11151 11188 10534 10659 11370 11914 12170 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span> 10000 10049 9944 10955 11665 11655 10313 10189 10933 11276 11489 AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Fidelity® Limited Term Bond Fund 2.71% 2.28% 2.42% Fidelity Limited Term Composite Index℠ 2.79% 2.21% 2.47% Bloomberg U.S. 1-5 Year Government/Credit Bond Index 2.15% 1.70% 1.98% Bloomberg U.S. Aggregate Bond Index 1.89% -0.29% 1.40%     Visit www.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. 0.0271 0.0228 0.0242 0.0279 0.0221 0.0247 0.0215 0.0170 0.0198 0.0189 -0.0029 0.0140 <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Visit </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">www.fidelity.com</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> for more recent performance information.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.</span> <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">Key Fund Statistics</span> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(as of August 31, 2026)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:right;text-align-last:auto;"><table cellpadding="0" cellspacing="1" style="border-collapse:separate;border-style:none;margin:auto;" width="100%"><tr><td style="width:63%; " valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">KEY FACTS</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> <span> </span></span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:32%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Fund Size</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>3,954,363,825</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Number of Holdings</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">1,173</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Total Advisory Fee</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>6,159,294</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="middle"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Portfolio Turnover</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">81<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 3954363825 1173 6159294 0.81   U.S. Government and U.S. Government Agency Obligations 15.2 AAA 7.2 AA 1.6 A 26.2 BBB 34.6 BB 5.5 B 2.6 CCC,CC,C 1.0 Not Rated 4.9 Equities 0.0 Short-Term Investments and Net Other Assets (Liabilities) 1.2 QUALITY DIVERSIFICATION (% of Fund's net assets)     U.S. Government and U.S. Government Agency Obligations - 15.2   AAA - 7.2                                  AA - 1.6                                   A - 26.2                                   BBB - 34.6                                 BB - 5.5                                   B - 2.6                                    CCC,CC,C - 1.0                             Not Rated - 4.9                            Equities - 0.0                             Short-Term Investments and Net Other Assets (Liabilities) - 1.2   We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes.         Corporate Bonds 67.9 U.S. Treasury Obligations 15.1 Asset-Backed Securities 9.3 CMOs and Other Mortgage Related Securities 3.9 Bank Loan Obligations 1.5 Preferred Securities 0.7 Foreign Government and Government Agency Obligations 0.2 Other Investments 0.1 U.S. Government Agency - Mortgage Securities 0.1 Preferred Stocks 0.0 Common Stocks 0.0 Short-Term Investments and Net Other Assets (Liabilities) 1.2 ASSET ALLOCATION (% of Fund's net assets)     Corporate Bonds - 67.9                     U.S. Treasury Obligations - 15.1           Asset-Backed Securities - 9.3              CMOs and Other Mortgage Related Securities - 3.9   Bank Loan Obligations - 1.5                Preferred Securities - 0.7                 Foreign Government and Government Agency Obligations - 0.2   Other Investments - 0.1                    U.S. Government Agency - Mortgage Securities - 0.1   Preferred Stocks - 0.0                     Common Stocks - 0.0                        Short-Term Investments and Net Other Assets (Liabilities) - 1.2   United States 74.9 United Kingdom 4.8 Grand Cayman (UK Overseas Ter) 4.6 Canada 3.8 Germany 2.5 Ireland 1.6 France 1.5 Japan 1.2 Bailiwick Of Jersey 1.2 Others 3.9 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)     United States - 74.9                       United Kingdom - 4.8                       Grand Cayman (UK Overseas Ter) - 4.6       Canada - 3.8                               Germany - 2.5                              Ireland - 1.6                              France - 1.5                               Japan - 1.2                                Bailiwick Of Jersey - 1.2                  Others - 3.9                                   0.152 0.072 0.016 0.262 0.346 0.055 0.026 0.010 0.049 0.000 0.012 0.679 0.151 0.093 0.039 0.015 0.007 0.002 0.001 0.001 0.000 0.000 0.012 0.749 0.048 0.046 0.038 0.025 0.016 0.015 0.012 0.012 0.039 TOP HOLDINGS(% of Fund's net assets)     US Treasury Notes 15.1   JPMorgan Chase & Co 1.8   Bank of America Corp 1.6   Morgan Stanley 1.6   HSBC Holdings PLC 1.4   Citigroup Inc 1.3   Wells Fargo & Co 1.2   General Motors Financial Co Inc 1.1   Deutsche Bank AG/New York NY 1.1   Ford Motor Credit Co LLC 1.0     27.2   0.151 0.018 0.016 0.016 0.014 0.013 0.012 0.011 0.011 0.010 2026-08-31 Fidelity Advisor® Limited Term Bond Fund Fidelity Advisor® Limited Term Bond Fund Class Z FIKRX This annual shareholder report contains information about Fidelity Advisor® Limited Term Bond Fund for the period September 1, 2025 to August 31, 2026. annual shareholder report You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. fundresearch.fidelity.com/prospectus/sec 1-877-208-0098 fidfunddocuments@fidelity.com <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What were your Fund costs for the last year?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(based on hypothetical $10,000 investment)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">FUND COST (PREVIOUS YEAR)</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><table cellpadding="0" cellspacing="0" style="border-collapse:collapse;border-style:none;" width="100%"><tr><td style="width:51%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> </td> <td style="width:21%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs of a $10,000 investment</span></div> </td> <td style="width:27%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs paid as a percentage of a $10,000 investment </span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:51%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">Class Z</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:21%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"> </span>25<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:27%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;">0.25<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 25 0.0025 <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What affected the Fund's performance this period?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>U.S. taxable investment-grade bonds achieved a gain for the 12 months ending August 31, 2026, buoyed by three policy interest-rate cuts by the Federal Reserve in late 2025, but pulled down since then by rising bond yields amid higher consumer inflation, a resilient economy and heavy U.S. Treasury issuance. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Against this backdrop, the fund's strategy of favoring limited-term corporate bonds, while underweighting similar-duration U.S. Treasurys, contributed to its performance versus the Composite index for the fiscal year. Within corporates, debt holdings among financial institutions, especially banks, and industrial firms, particularly in the consumer cyclical segment, added value. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Non-Composite exposure to asset-backed securities, including collateralized loan obligations and car loan debt, also helped, as did an out-of-index allocation to commercial mortgage-backed securities. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>In contrast, the fund's yield-curve positioning, including the underweighting of the two-year key rate in favor of positions farther out on the curve, modestly detracted from relative performance. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>At period end, corporates made up 71% of fund assets, roughly equal to the Composite index and notably overweight versus the Bloomberg 1-5 year benchmark. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Exposure to U.S. Treasurys stood at about 15% as of August 31, compared with roughly 69% for the Bloomberg benchmark and 20% for the Composite index, while out-of-index exposure to ABS closed the fiscal year at about 9% of fund assets.  </span></div> <div style="text-align:left;text-align-last:auto;"></div> How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE October 2, 2018 through August 31, 2026. Initial investment of $10,000. Class Z $10,000 $10,618 $11,145 $11,234 $10,519 $10,776 $11,622 $12,275 $12,613 Fidelity Limited Term Composite Index℠ $10,000 $10,650 $11,185 $11,290 $10,610 $10,802 $11,615 $12,252 $12,594 Bloomberg U.S. 1-5 Year Government/Credit Bond Index $10,000 $10,616 $11,117 $11,153 $10,502 $10,626 $11,335 $11,878 $12,132 Bloomberg U.S. Aggregate Bond Index $10,000 $11,086 $11,804 $11,794 $10,436 $10,311 $11,064 $11,411 $11,626   2018 2019 2020 2021 2022 2023 2024 2025 2026   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class Z</span> 10000 10618 11145 11234 10519 10776 11622 12275 12613 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Limited Term Composite Index℠</span> 10000 10650 11185 11290 10610 10802 11615 12252 12594 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. 1-5 Year Government/Credit Bond Index</span> 10000 10616 11117 11153 10502 10626 11335 11878 12132 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span> 10000 11086 11804 11794 10436 10311 11064 11411 11626 AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class Z 2.76% 2.34% 2.98% Fidelity Limited Term Composite Index℠ 2.79% 2.21% 2.96% Bloomberg U.S. 1-5 Year Government/Credit Bond Index 2.15% 1.70% 2.47% Bloomberg U.S. Aggregate Bond Index 1.89% -0.29% 1.92% A   From October 2, 2018   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. 0.0276 0.0234 0.0298 0.0279 0.0221 0.0296 0.0215 0.0170 0.0247 0.0189 -0.0029 0.0192 2018-10-02 <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Visit </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">institutional.fidelity.com</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> for more recent performance information.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.</span> <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">Key Fund Statistics</span> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(as of August 31, 2026)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:right;text-align-last:auto;"><table cellpadding="0" cellspacing="1" style="border-collapse:separate;border-style:none;margin:auto;" width="100%"><tr><td style="width:63%; " valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">KEY FACTS</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> <span> </span></span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:32%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Fund Size</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>3,954,363,825</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Number of Holdings</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">1,173</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Total Advisory Fee</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>6,159,294</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="middle"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Portfolio Turnover</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">81<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 3954363825 1173 6159294 0.81   U.S. Government and U.S. Government Agency Obligations 15.2 AAA 7.2 AA 1.6 A 26.2 BBB 34.6 BB 5.5 B 2.6 CCC,CC,C 1.0 Not Rated 4.9 Equities 0.0 Short-Term Investments and Net Other Assets (Liabilities) 1.2 QUALITY DIVERSIFICATION (% of Fund's net assets)     U.S. Government and U.S. Government Agency Obligations - 15.2   AAA - 7.2                                  AA - 1.6                                   A - 26.2                                   BBB - 34.6                                 BB - 5.5                                   B - 2.6                                    CCC,CC,C - 1.0                             Not Rated - 4.9                            Equities - 0.0                             Short-Term Investments and Net Other Assets (Liabilities) - 1.2   We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes.         Corporate Bonds 67.9 U.S. Treasury Obligations 15.1 Asset-Backed Securities 9.3 CMOs and Other Mortgage Related Securities 3.9 Bank Loan Obligations 1.5 Preferred Securities 0.7 Foreign Government and Government Agency Obligations 0.2 Other Investments 0.1 U.S. Government Agency - Mortgage Securities 0.1 Preferred Stocks 0.0 Common Stocks 0.0 Short-Term Investments and Net Other Assets (Liabilities) 1.2 ASSET ALLOCATION (% of Fund's net assets)     Corporate Bonds - 67.9                     U.S. Treasury Obligations - 15.1           Asset-Backed Securities - 9.3              CMOs and Other Mortgage Related Securities - 3.9   Bank Loan Obligations - 1.5                Preferred Securities - 0.7                 Foreign Government and Government Agency Obligations - 0.2   Other Investments - 0.1                    U.S. Government Agency - Mortgage Securities - 0.1   Preferred Stocks - 0.0                     Common Stocks - 0.0                        Short-Term Investments and Net Other Assets (Liabilities) - 1.2   United States 74.9 United Kingdom 4.8 Grand Cayman (UK Overseas Ter) 4.6 Canada 3.8 Germany 2.5 Ireland 1.6 France 1.5 Japan 1.2 Bailiwick Of Jersey 1.2 Others 3.9 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)     United States - 74.9                       United Kingdom - 4.8                       Grand Cayman (UK Overseas Ter) - 4.6       Canada - 3.8                               Germany - 2.5                              Ireland - 1.6                              France - 1.5                               Japan - 1.2                                Bailiwick Of Jersey - 1.2                  Others - 3.9                                   0.152 0.072 0.016 0.262 0.346 0.055 0.026 0.010 0.049 0.000 0.012 0.679 0.151 0.093 0.039 0.015 0.007 0.002 0.001 0.001 0.000 0.000 0.012 0.749 0.048 0.046 0.038 0.025 0.016 0.015 0.012 0.012 0.039 TOP HOLDINGS(% of Fund's net assets)     US Treasury Notes 15.1   JPMorgan Chase & Co 1.8   Bank of America Corp 1.6   Morgan Stanley 1.6   HSBC Holdings PLC 1.4   Citigroup Inc 1.3   Wells Fargo & Co 1.2   General Motors Financial Co Inc 1.1   Deutsche Bank AG/New York NY 1.1   Ford Motor Credit Co LLC 1.0     27.2   0.151 0.018 0.016 0.016 0.014 0.013 0.012 0.011 0.011 0.010 2026-08-31 Fidelity Advisor® Limited Term Bond Fund Fidelity Advisor® Limited Term Bond Fund Class M FTBRX This annual shareholder report contains information about Fidelity Advisor® Limited Term Bond Fund for the period September 1, 2025 to August 31, 2026. annual shareholder report You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. fundresearch.fidelity.com/prospectus/sec 1-877-208-0098 fidfunddocuments@fidelity.com <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What were your Fund costs for the last year?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(based on hypothetical $10,000 investment)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">FUND COST (PREVIOUS YEAR)</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><table cellpadding="0" cellspacing="0" style="border-collapse:collapse;border-style:none;" width="100%"><tr><td style="width:51%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> </td> <td style="width:21%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs of a $10,000 investment</span></div> </td> <td style="width:27%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs paid as a percentage of a $10,000 investment </span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:51%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">Class M</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:21%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"> </span>61<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:27%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;">0.60<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 61 0.0060 <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What affected the Fund's performance this period?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>U.S. taxable investment-grade bonds achieved a gain for the 12 months ending August 31, 2026, buoyed by three policy interest-rate cuts by the Federal Reserve in late 2025, but pulled down since then by rising bond yields amid higher consumer inflation, a resilient economy and heavy U.S. Treasury issuance. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Against this backdrop, the fund's strategy of favoring limited-term corporate bonds, while underweighting similar-duration U.S. Treasurys, contributed to its performance versus the Composite index for the fiscal year. Within corporates, debt holdings among financial institutions, especially banks, and industrial firms, particularly in the consumer cyclical segment, added value. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Non-Composite exposure to asset-backed securities, including collateralized loan obligations and car loan debt, also helped, as did an out-of-index allocation to commercial mortgage-backed securities. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>In contrast, the fund's yield-curve positioning, including the underweighting of the two-year key rate in favor of positions farther out on the curve, modestly detracted from relative performance. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>At period end, corporates made up 71% of fund assets, roughly equal to the Composite index and notably overweight versus the Bloomberg 1-5 year benchmark. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Exposure to U.S. Treasurys stood at about 15% as of August 31, compared with roughly 69% for the Bloomberg benchmark and 20% for the Composite index, while out-of-index exposure to ABS closed the fiscal year at about 9% of fund assets.  </span></div> <div style="text-align:left;text-align-last:auto;"></div> How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE August 31, 2016 through August 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class M $9,725 $9,831 $9,781 $10,350 $10,812 $10,855 $10,122 $10,340 $11,104 $11,687 $11,978 Fidelity Limited Term Composite Index℠ $10,000 $10,153 $10,139 $10,788 $11,331 $11,437 $10,748 $10,943 $11,766 $12,411 $12,758 Bloomberg U.S. 1-5 Year Government/Credit Bond Index $10,000 $10,093 $10,049 $10,648 $11,151 $11,188 $10,534 $10,659 $11,370 $11,914 $12,170 Bloomberg U.S. Aggregate Bond Index $10,000 $10,049 $9,944 $10,955 $11,665 $11,655 $10,313 $10,189 $10,933 $11,276 $11,489   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class M</span> 9725 9831 9781 10350 10812 10855 10122 10340 11104 11687 11978 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Limited Term Composite Index℠</span> 10000 10153 10139 10788 11331 11437 10748 10943 11766 12411 12758 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. 1-5 Year Government/Credit Bond Index</span> 10000 10093 10049 10648 11151 11188 10534 10659 11370 11914 12170 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span> 10000 10049 9944 10955 11665 11655 10313 10189 10933 11276 11489 AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class M (incl. 2.75% sales charge)   -0.33% 1.42% 1.82% Class M (without 2.75% sales charge) 2.49% 1.99% 2.11% Fidelity Limited Term Composite Index℠ 2.79% 2.21% 2.47% Bloomberg U.S. 1-5 Year Government/Credit Bond Index 2.15% 1.70% 1.98% Bloomberg U.S. Aggregate Bond Index 1.89% -0.29% 1.40%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. -0.0033 0.0142 0.0182 0.0249 0.0199 0.0211 0.0279 0.0221 0.0247 0.0215 0.0170 0.0198 0.0189 -0.0029 0.0140 <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Visit </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">institutional.fidelity.com</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> for more recent performance information.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.</span> <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">Key Fund Statistics</span> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(as of August 31, 2026)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:right;text-align-last:auto;"><table cellpadding="0" cellspacing="1" style="border-collapse:separate;border-style:none;margin:auto;" width="100%"><tr><td style="width:63%; " valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">KEY FACTS</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> <span> </span></span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:32%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Fund Size</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>3,954,363,825</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Number of Holdings</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">1,173</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Total Advisory Fee</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>6,159,294</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="middle"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Portfolio Turnover</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">81<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 3954363825 1173 6159294 0.81   U.S. Government and U.S. Government Agency Obligations 15.2 AAA 7.2 AA 1.6 A 26.2 BBB 34.6 BB 5.5 B 2.6 CCC,CC,C 1.0 Not Rated 4.9 Equities 0.0 Short-Term Investments and Net Other Assets (Liabilities) 1.2 QUALITY DIVERSIFICATION (% of Fund's net assets)     U.S. Government and U.S. Government Agency Obligations - 15.2   AAA - 7.2                                  AA - 1.6                                   A - 26.2                                   BBB - 34.6                                 BB - 5.5                                   B - 2.6                                    CCC,CC,C - 1.0                             Not Rated - 4.9                            Equities - 0.0                             Short-Term Investments and Net Other Assets (Liabilities) - 1.2   We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes.         Corporate Bonds 67.9 U.S. Treasury Obligations 15.1 Asset-Backed Securities 9.3 CMOs and Other Mortgage Related Securities 3.9 Bank Loan Obligations 1.5 Preferred Securities 0.7 Foreign Government and Government Agency Obligations 0.2 Other Investments 0.1 U.S. Government Agency - Mortgage Securities 0.1 Preferred Stocks 0.0 Common Stocks 0.0 Short-Term Investments and Net Other Assets (Liabilities) 1.2 ASSET ALLOCATION (% of Fund's net assets)     Corporate Bonds - 67.9                     U.S. Treasury Obligations - 15.1           Asset-Backed Securities - 9.3              CMOs and Other Mortgage Related Securities - 3.9   Bank Loan Obligations - 1.5                Preferred Securities - 0.7                 Foreign Government and Government Agency Obligations - 0.2   Other Investments - 0.1                    U.S. Government Agency - Mortgage Securities - 0.1   Preferred Stocks - 0.0                     Common Stocks - 0.0                        Short-Term Investments and Net Other Assets (Liabilities) - 1.2   United States 74.9 United Kingdom 4.8 Grand Cayman (UK Overseas Ter) 4.6 Canada 3.8 Germany 2.5 Ireland 1.6 France 1.5 Japan 1.2 Bailiwick Of Jersey 1.2 Others 3.9 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)     United States - 74.9                       United Kingdom - 4.8                       Grand Cayman (UK Overseas Ter) - 4.6       Canada - 3.8                               Germany - 2.5                              Ireland - 1.6                              France - 1.5                               Japan - 1.2                                Bailiwick Of Jersey - 1.2                  Others - 3.9                                   0.152 0.072 0.016 0.262 0.346 0.055 0.026 0.010 0.049 0.000 0.012 0.679 0.151 0.093 0.039 0.015 0.007 0.002 0.001 0.001 0.000 0.000 0.012 0.749 0.048 0.046 0.038 0.025 0.016 0.015 0.012 0.012 0.039 TOP HOLDINGS(% of Fund's net assets)     US Treasury Notes 15.1   JPMorgan Chase & Co 1.8   Bank of America Corp 1.6   Morgan Stanley 1.6   HSBC Holdings PLC 1.4   Citigroup Inc 1.3   Wells Fargo & Co 1.2   General Motors Financial Co Inc 1.1   Deutsche Bank AG/New York NY 1.1   Ford Motor Credit Co LLC 1.0     27.2   0.151 0.018 0.016 0.016 0.014 0.013 0.012 0.011 0.011 0.010 2026-08-31 Fidelity Advisor® Limited Term Bond Fund Fidelity Advisor® Limited Term Bond Fund Class I EFIPX This annual shareholder report contains information about Fidelity Advisor® Limited Term Bond Fund for the period September 1, 2025 to August 31, 2026. annual shareholder report You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. fundresearch.fidelity.com/prospectus/sec 1-877-208-0098 fidfunddocuments@fidelity.com <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What were your Fund costs for the last year?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(based on hypothetical $10,000 investment)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">FUND COST (PREVIOUS YEAR)</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><table cellpadding="0" cellspacing="0" style="border-collapse:collapse;border-style:none;" width="100%"><tr><td style="width:51%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> </td> <td style="width:21%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs of a $10,000 investment</span></div> </td> <td style="width:27%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs paid as a percentage of a $10,000 investment </span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:51%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">Class I</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:21%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"> </span>30<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:27%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;">0.30<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 30 0.0030 <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What affected the Fund's performance this period?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>U.S. taxable investment-grade bonds achieved a gain for the 12 months ending August 31, 2026, buoyed by three policy interest-rate cuts by the Federal Reserve in late 2025, but pulled down since then by rising bond yields amid higher consumer inflation, a resilient economy and heavy U.S. Treasury issuance. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Against this backdrop, the fund's strategy of favoring limited-term corporate bonds, while underweighting similar-duration U.S. Treasurys, contributed to its performance versus the Composite index for the fiscal year. Within corporates, debt holdings among financial institutions, especially banks, and industrial firms, particularly in the consumer cyclical segment, added value. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Non-Composite exposure to asset-backed securities, including collateralized loan obligations and car loan debt, also helped, as did an out-of-index allocation to commercial mortgage-backed securities. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>In contrast, the fund's yield-curve positioning, including the underweighting of the two-year key rate in favor of positions farther out on the curve, modestly detracted from relative performance. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>At period end, corporates made up 71% of fund assets, roughly equal to the Composite index and notably overweight versus the Bloomberg 1-5 year benchmark. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Exposure to U.S. Treasurys stood at about 15% as of August 31, compared with roughly 69% for the Bloomberg benchmark and 20% for the Composite index, while out-of-index exposure to ABS closed the fiscal year at about 9% of fund assets.  </span></div> <div style="text-align:left;text-align-last:auto;"></div> How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE August 31, 2016 through August 31, 2026. Initial investment of $10,000. Class I $10,000 $10,136 $10,112 $10,718 $11,235 $11,308 $10,574 $10,822 $11,665 $12,314 $12,648 Fidelity Limited Term Composite Index℠ $10,000 $10,153 $10,139 $10,788 $11,331 $11,437 $10,748 $10,943 $11,766 $12,411 $12,758 Bloomberg U.S. 1-5 Year Government/Credit Bond Index $10,000 $10,093 $10,049 $10,648 $11,151 $11,188 $10,534 $10,659 $11,370 $11,914 $12,170 Bloomberg U.S. Aggregate Bond Index $10,000 $10,049 $9,944 $10,955 $11,665 $11,655 $10,313 $10,189 $10,933 $11,276 $11,489   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class I</span> 10000 10136 10112 10718 11235 11308 10574 10822 11665 12314 12648 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Limited Term Composite Index℠</span> 10000 10153 10139 10788 11331 11437 10748 10943 11766 12411 12758 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. 1-5 Year Government/Credit Bond Index</span> 10000 10093 10049 10648 11151 11188 10534 10659 11370 11914 12170 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span> 10000 10049 9944 10955 11665 11655 10313 10189 10933 11276 11489 AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class I 2.71% 2.26% 2.38% Fidelity Limited Term Composite Index℠ 2.79% 2.21% 2.47% Bloomberg U.S. 1-5 Year Government/Credit Bond Index 2.15% 1.70% 1.98% Bloomberg U.S. Aggregate Bond Index 1.89% -0.29% 1.40%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. 0.0271 0.0226 0.0238 0.0279 0.0221 0.0247 0.0215 0.0170 0.0198 0.0189 -0.0029 0.0140 <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Visit </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">institutional.fidelity.com</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> for more recent performance information.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.</span> <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">Key Fund Statistics</span> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(as of August 31, 2026)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:right;text-align-last:auto;"><table cellpadding="0" cellspacing="1" style="border-collapse:separate;border-style:none;margin:auto;" width="100%"><tr><td style="width:63%; " valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">KEY FACTS</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> <span> </span></span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:32%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Fund Size</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>3,954,363,825</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Number of Holdings</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">1,173</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Total Advisory Fee</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>6,159,294</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="middle"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Portfolio Turnover</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">81<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 3954363825 1173 6159294 0.81   U.S. Government and U.S. Government Agency Obligations 15.2 AAA 7.2 AA 1.6 A 26.2 BBB 34.6 BB 5.5 B 2.6 CCC,CC,C 1.0 Not Rated 4.9 Equities 0.0 Short-Term Investments and Net Other Assets (Liabilities) 1.2 QUALITY DIVERSIFICATION (% of Fund's net assets)     U.S. Government and U.S. Government Agency Obligations - 15.2   AAA - 7.2                                  AA - 1.6                                   A - 26.2                                   BBB - 34.6                                 BB - 5.5                                   B - 2.6                                    CCC,CC,C - 1.0                             Not Rated - 4.9                            Equities - 0.0                             Short-Term Investments and Net Other Assets (Liabilities) - 1.2   We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes.         Corporate Bonds 67.9 U.S. Treasury Obligations 15.1 Asset-Backed Securities 9.3 CMOs and Other Mortgage Related Securities 3.9 Bank Loan Obligations 1.5 Preferred Securities 0.7 Foreign Government and Government Agency Obligations 0.2 Other Investments 0.1 U.S. Government Agency - Mortgage Securities 0.1 Preferred Stocks 0.0 Common Stocks 0.0 Short-Term Investments and Net Other Assets (Liabilities) 1.2 ASSET ALLOCATION (% of Fund's net assets)     Corporate Bonds - 67.9                     U.S. Treasury Obligations - 15.1           Asset-Backed Securities - 9.3              CMOs and Other Mortgage Related Securities - 3.9   Bank Loan Obligations - 1.5                Preferred Securities - 0.7                 Foreign Government and Government Agency Obligations - 0.2   Other Investments - 0.1                    U.S. Government Agency - Mortgage Securities - 0.1   Preferred Stocks - 0.0                     Common Stocks - 0.0                        Short-Term Investments and Net Other Assets (Liabilities) - 1.2   United States 74.9 United Kingdom 4.8 Grand Cayman (UK Overseas Ter) 4.6 Canada 3.8 Germany 2.5 Ireland 1.6 France 1.5 Japan 1.2 Bailiwick Of Jersey 1.2 Others 3.9 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)     United States - 74.9                       United Kingdom - 4.8                       Grand Cayman (UK Overseas Ter) - 4.6       Canada - 3.8                               Germany - 2.5                              Ireland - 1.6                              France - 1.5                               Japan - 1.2                                Bailiwick Of Jersey - 1.2                  Others - 3.9                                   0.152 0.072 0.016 0.262 0.346 0.055 0.026 0.010 0.049 0.000 0.012 0.679 0.151 0.093 0.039 0.015 0.007 0.002 0.001 0.001 0.000 0.000 0.012 0.749 0.048 0.046 0.038 0.025 0.016 0.015 0.012 0.012 0.039 TOP HOLDINGS(% of Fund's net assets)     US Treasury Notes 15.1   JPMorgan Chase & Co 1.8   Bank of America Corp 1.6   Morgan Stanley 1.6   HSBC Holdings PLC 1.4   Citigroup Inc 1.3   Wells Fargo & Co 1.2   General Motors Financial Co Inc 1.1   Deutsche Bank AG/New York NY 1.1   Ford Motor Credit Co LLC 1.0     27.2   0.151 0.018 0.016 0.016 0.014 0.013 0.012 0.011 0.011 0.010 2026-08-31 Fidelity Advisor® Limited Term Bond Fund Fidelity Advisor® Limited Term Bond Fund Class C FNBCX This annual shareholder report contains information about Fidelity Advisor® Limited Term Bond Fund for the period September 1, 2025 to August 31, 2026. annual shareholder report You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. fundresearch.fidelity.com/prospectus/sec 1-877-208-0098 fidfunddocuments@fidelity.com <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What were your Fund costs for the last year?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(based on hypothetical $10,000 investment)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">FUND COST (PREVIOUS YEAR)</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><table cellpadding="0" cellspacing="0" style="border-collapse:collapse;border-style:none;" width="100%"><tr><td style="width:51%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> </td> <td style="width:21%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs of a $10,000 investment</span></div> </td> <td style="width:27%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs paid as a percentage of a $10,000 investment </span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:51%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">Class C</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:21%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"> </span>138<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:27%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;">1.37<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 138 0.0137 <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What affected the Fund's performance this period?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>U.S. taxable investment-grade bonds achieved a gain for the 12 months ending August 31, 2026, buoyed by three policy interest-rate cuts by the Federal Reserve in late 2025, but pulled down since then by rising bond yields amid higher consumer inflation, a resilient economy and heavy U.S. Treasury issuance. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Against this backdrop, the fund's strategy of favoring limited-term corporate bonds, while underweighting similar-duration U.S. Treasurys, contributed to its performance versus the Composite index for the fiscal year. Within corporates, debt holdings among financial institutions, especially banks, and industrial firms, particularly in the consumer cyclical segment, added value. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Non-Composite exposure to asset-backed securities, including collateralized loan obligations and car loan debt, also helped, as did an out-of-index allocation to commercial mortgage-backed securities. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>In contrast, the fund's yield-curve positioning, including the underweighting of the two-year key rate in favor of positions farther out on the curve, modestly detracted from relative performance. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>At period end, corporates made up 71% of fund assets, roughly equal to the Composite index and notably overweight versus the Bloomberg 1-5 year benchmark. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Exposure to U.S. Treasurys stood at about 15% as of August 31, compared with roughly 69% for the Bloomberg benchmark and 20% for the Composite index, while out-of-index exposure to ABS closed the fiscal year at about 9% of fund assets.  </span></div> <div style="text-align:left;text-align-last:auto;"></div> How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE August 31, 2016 through August 31, 2026. Initial investment of $10,000. Class C $10,000 $10,032 $9,904 $10,399 $10,780 $10,739 $9,935 $10,061 $10,732 $11,296 $11,566 Fidelity Limited Term Composite Index℠ $10,000 $10,153 $10,139 $10,788 $11,331 $11,437 $10,748 $10,943 $11,766 $12,411 $12,758 Bloomberg U.S. 1-5 Year Government/Credit Bond Index $10,000 $10,093 $10,049 $10,648 $11,151 $11,188 $10,534 $10,659 $11,370 $11,914 $12,170 Bloomberg U.S. Aggregate Bond Index $10,000 $10,049 $9,944 $10,955 $11,665 $11,655 $10,313 $10,189 $10,933 $11,276 $11,489   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class C</span> 10000 10032 9904 10399 10780 10739 9935 10061 10732 11296 11566 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Limited Term Composite Index℠</span> 10000 10153 10139 10788 11331 11437 10748 10943 11766 12411 12758 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. 1-5 Year Government/Credit Bond Index</span> 10000 10093 10049 10648 11151 11188 10534 10659 11370 11914 12170 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span> 10000 10049 9944 10955 11665 11655 10313 10189 10933 11276 11489 AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class C  (incl. contingent deferred sales charge) 0.62% 1.19% 1.47% Class C 1.61% 1.19% 1.47% Fidelity Limited Term Composite Index℠ 2.79% 2.21% 2.47% Bloomberg U.S. 1-5 Year Government/Credit Bond Index 2.15% 1.70% 1.98% Bloomberg U.S. Aggregate Bond Index 1.89% -0.29% 1.40%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. 0.0062 0.0119 0.0147 0.0161 0.0119 0.0147 0.0279 0.0221 0.0247 0.0215 0.0170 0.0198 0.0189 -0.0029 0.0140 <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Visit </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">institutional.fidelity.com</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> for more recent performance information.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.</span> <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">Key Fund Statistics</span> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(as of August 31, 2026)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:right;text-align-last:auto;"><table cellpadding="0" cellspacing="1" style="border-collapse:separate;border-style:none;margin:auto;" width="100%"><tr><td style="width:63%; " valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">KEY FACTS</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> <span> </span></span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:32%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Fund Size</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>3,954,363,825</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Number of Holdings</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">1,173</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Total Advisory Fee</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>6,159,294</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="middle"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Portfolio Turnover</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">81<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 3954363825 1173 6159294 0.81   U.S. Government and U.S. Government Agency Obligations 15.2 AAA 7.2 AA 1.6 A 26.2 BBB 34.6 BB 5.5 B 2.6 CCC,CC,C 1.0 Not Rated 4.9 Equities 0.0 Short-Term Investments and Net Other Assets (Liabilities) 1.2 QUALITY DIVERSIFICATION (% of Fund's net assets)     U.S. Government and U.S. Government Agency Obligations - 15.2   AAA - 7.2                                  AA - 1.6                                   A - 26.2                                   BBB - 34.6                                 BB - 5.5                                   B - 2.6                                    CCC,CC,C - 1.0                             Not Rated - 4.9                            Equities - 0.0                             Short-Term Investments and Net Other Assets (Liabilities) - 1.2   We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes.         Corporate Bonds 67.9 U.S. Treasury Obligations 15.1 Asset-Backed Securities 9.3 CMOs and Other Mortgage Related Securities 3.9 Bank Loan Obligations 1.5 Preferred Securities 0.7 Foreign Government and Government Agency Obligations 0.2 Other Investments 0.1 U.S. Government Agency - Mortgage Securities 0.1 Preferred Stocks 0.0 Common Stocks 0.0 Short-Term Investments and Net Other Assets (Liabilities) 1.2 ASSET ALLOCATION (% of Fund's net assets)     Corporate Bonds - 67.9                     U.S. Treasury Obligations - 15.1           Asset-Backed Securities - 9.3              CMOs and Other Mortgage Related Securities - 3.9   Bank Loan Obligations - 1.5                Preferred Securities - 0.7                 Foreign Government and Government Agency Obligations - 0.2   Other Investments - 0.1                    U.S. Government Agency - Mortgage Securities - 0.1   Preferred Stocks - 0.0                     Common Stocks - 0.0                        Short-Term Investments and Net Other Assets (Liabilities) - 1.2   United States 74.9 United Kingdom 4.8 Grand Cayman (UK Overseas Ter) 4.6 Canada 3.8 Germany 2.5 Ireland 1.6 France 1.5 Japan 1.2 Bailiwick Of Jersey 1.2 Others 3.9 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)     United States - 74.9                       United Kingdom - 4.8                       Grand Cayman (UK Overseas Ter) - 4.6       Canada - 3.8                               Germany - 2.5                              Ireland - 1.6                              France - 1.5                               Japan - 1.2                                Bailiwick Of Jersey - 1.2                  Others - 3.9                                   0.152 0.072 0.016 0.262 0.346 0.055 0.026 0.010 0.049 0.000 0.012 0.679 0.151 0.093 0.039 0.015 0.007 0.002 0.001 0.001 0.000 0.000 0.012 0.749 0.048 0.046 0.038 0.025 0.016 0.015 0.012 0.012 0.039 TOP HOLDINGS(% of Fund's net assets)     US Treasury Notes 15.1   JPMorgan Chase & Co 1.8   Bank of America Corp 1.6   Morgan Stanley 1.6   HSBC Holdings PLC 1.4   Citigroup Inc 1.3   Wells Fargo & Co 1.2   General Motors Financial Co Inc 1.1   Deutsche Bank AG/New York NY 1.1   Ford Motor Credit Co LLC 1.0     27.2   0.151 0.018 0.016 0.016 0.014 0.013 0.012 0.011 0.011 0.010 2026-08-31 Fidelity Advisor® Limited Term Bond Fund Fidelity Advisor® Limited Term Bond Fund Class A FDIAX This annual shareholder report contains information about Fidelity Advisor® Limited Term Bond Fund for the period September 1, 2025 to August 31, 2026. annual shareholder report You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. fundresearch.fidelity.com/prospectus/sec 1-877-208-0098 fidfunddocuments@fidelity.com <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What were your Fund costs for the last year?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(based on hypothetical $10,000 investment)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">FUND COST (PREVIOUS YEAR)</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><table cellpadding="0" cellspacing="0" style="border-collapse:collapse;border-style:none;" width="100%"><tr><td style="width:51%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> </td> <td style="width:21%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs of a $10,000 investment</span></div> </td> <td style="width:27%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs paid as a percentage of a $10,000 investment </span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:51%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">Class A</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:21%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"> </span>61<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:27%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;">0.60<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 61 0.0060 <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What affected the Fund's performance this period?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>U.S. taxable investment-grade bonds achieved a gain for the 12 months ending August 31, 2026, buoyed by three policy interest-rate cuts by the Federal Reserve in late 2025, but pulled down since then by rising bond yields amid higher consumer inflation, a resilient economy and heavy U.S. Treasury issuance. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Against this backdrop, the fund's strategy of favoring limited-term corporate bonds, while underweighting similar-duration U.S. Treasurys, contributed to its performance versus the Composite index for the fiscal year. Within corporates, debt holdings among financial institutions, especially banks, and industrial firms, particularly in the consumer cyclical segment, added value. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Non-Composite exposure to asset-backed securities, including collateralized loan obligations and car loan debt, also helped, as did an out-of-index allocation to commercial mortgage-backed securities. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>In contrast, the fund's yield-curve positioning, including the underweighting of the two-year key rate in favor of positions farther out on the curve, modestly detracted from relative performance. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>At period end, corporates made up 71% of fund assets, roughly equal to the Composite index and notably overweight versus the Bloomberg 1-5 year benchmark. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Exposure to U.S. Treasurys stood at about 15% as of August 31, compared with roughly 69% for the Bloomberg benchmark and 20% for the Composite index, while out-of-index exposure to ABS closed the fiscal year at about 9% of fund assets.  </span></div> <div style="text-align:left;text-align-last:auto;"></div> How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE August 31, 2016 through August 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class A $9,725 $9,840 $9,791 $10,352 $10,824 $10,867 $10,134 $10,343 $11,117 $11,701 $11,981 Fidelity Limited Term Composite Index℠ $10,000 $10,153 $10,139 $10,788 $11,331 $11,437 $10,748 $10,943 $11,766 $12,411 $12,758 Bloomberg U.S. 1-5 Year Government/Credit Bond Index $10,000 $10,093 $10,049 $10,648 $11,151 $11,188 $10,534 $10,659 $11,370 $11,914 $12,170 Bloomberg U.S. Aggregate Bond Index $10,000 $10,049 $9,944 $10,955 $11,665 $11,655 $10,313 $10,189 $10,933 $11,276 $11,489   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class A</span> 9725 9840 9791 10352 10824 10867 10134 10343 11117 11701 11981 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Limited Term Composite Index℠</span> 10000 10153 10139 10788 11331 11437 10748 10943 11766 12411 12758 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. 1-5 Year Government/Credit Bond Index</span> 10000 10093 10049 10648 11151 11188 10534 10659 11370 11914 12170 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span> 10000 10049 9944 10955 11665 11655 10313 10189 10933 11276 11489 AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class A (incl. 2.75% sales charge)   -0.42% 1.40% 1.82% Class A (without 2.75% sales charge) 2.40% 1.97% 2.11% Fidelity Limited Term Composite Index℠ 2.79% 2.21% 2.47% Bloomberg U.S. 1-5 Year Government/Credit Bond Index 2.15% 1.70% 1.98% Bloomberg U.S. Aggregate Bond Index 1.89% -0.29% 1.40%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. -0.0042 0.0140 0.0182 0.0240 0.0197 0.0211 0.0279 0.0221 0.0247 0.0215 0.0170 0.0198 0.0189 -0.0029 0.0140 <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Visit </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">institutional.fidelity.com</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> for more recent performance information.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.</span> <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">Key Fund Statistics</span> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(as of August 31, 2026)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:right;text-align-last:auto;"><table cellpadding="0" cellspacing="1" style="border-collapse:separate;border-style:none;margin:auto;" width="100%"><tr><td style="width:63%; " valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">KEY FACTS</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> <span> </span></span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:32%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Fund Size</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>3,954,363,825</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Number of Holdings</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">1,173</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Total Advisory Fee</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>6,159,294</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="middle"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Portfolio Turnover</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">81<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 3954363825 1173 6159294 0.81   U.S. Government and U.S. Government Agency Obligations 15.2 AAA 7.2 AA 1.6 A 26.2 BBB 34.6 BB 5.5 B 2.6 CCC,CC,C 1.0 Not Rated 4.9 Equities 0.0 Short-Term Investments and Net Other Assets (Liabilities) 1.2 QUALITY DIVERSIFICATION (% of Fund's net assets)     U.S. Government and U.S. Government Agency Obligations - 15.2   AAA - 7.2                                  AA - 1.6                                   A - 26.2                                   BBB - 34.6                                 BB - 5.5                                   B - 2.6                                    CCC,CC,C - 1.0                             Not Rated - 4.9                            Equities - 0.0                             Short-Term Investments and Net Other Assets (Liabilities) - 1.2   We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes.         Corporate Bonds 67.9 U.S. Treasury Obligations 15.1 Asset-Backed Securities 9.3 CMOs and Other Mortgage Related Securities 3.9 Bank Loan Obligations 1.5 Preferred Securities 0.7 Foreign Government and Government Agency Obligations 0.2 Other Investments 0.1 U.S. Government Agency - Mortgage Securities 0.1 Preferred Stocks 0.0 Common Stocks 0.0 Short-Term Investments and Net Other Assets (Liabilities) 1.2 ASSET ALLOCATION (% of Fund's net assets)     Corporate Bonds - 67.9                     U.S. Treasury Obligations - 15.1           Asset-Backed Securities - 9.3              CMOs and Other Mortgage Related Securities - 3.9   Bank Loan Obligations - 1.5                Preferred Securities - 0.7                 Foreign Government and Government Agency Obligations - 0.2   Other Investments - 0.1                    U.S. Government Agency - Mortgage Securities - 0.1   Preferred Stocks - 0.0                     Common Stocks - 0.0                        Short-Term Investments and Net Other Assets (Liabilities) - 1.2   United States 74.9 United Kingdom 4.8 Grand Cayman (UK Overseas Ter) 4.6 Canada 3.8 Germany 2.5 Ireland 1.6 France 1.5 Japan 1.2 Bailiwick Of Jersey 1.2 Others 3.9 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)     United States - 74.9                       United Kingdom - 4.8                       Grand Cayman (UK Overseas Ter) - 4.6       Canada - 3.8                               Germany - 2.5                              Ireland - 1.6                              France - 1.5                               Japan - 1.2                                Bailiwick Of Jersey - 1.2                  Others - 3.9                                   0.152 0.072 0.016 0.262 0.346 0.055 0.026 0.010 0.049 0.000 0.012 0.679 0.151 0.093 0.039 0.015 0.007 0.002 0.001 0.001 0.000 0.000 0.012 0.749 0.048 0.046 0.038 0.025 0.016 0.015 0.012 0.012 0.039 TOP HOLDINGS(% of Fund's net assets)     US Treasury Notes 15.1   JPMorgan Chase & Co 1.8   Bank of America Corp 1.6   Morgan Stanley 1.6   HSBC Holdings PLC 1.4   Citigroup Inc 1.3   Wells Fargo & Co 1.2   General Motors Financial Co Inc 1.1   Deutsche Bank AG/New York NY 1.1   Ford Motor Credit Co LLC 1.0     27.2   0.151 0.018 0.016 0.016 0.014 0.013 0.012 0.011 0.011 0.010 2026-08-31 Fidelity® Limited Term Securitized Completion Fund Fidelity® Limited Term Securitized Completion Fund FLTGX This annual shareholder report contains information about Fidelity® Limited Term Securitized Completion Fund for the period September 1, 2025 to August 31, 2026. annual shareholder report You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-8544 or by sending an e-mail to fidfunddocuments@fidelity.com. fundresearch.fidelity.com/prospectus/sec 1-800-544-8544 fidfunddocuments@fidelity.com <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What were your Fund costs for the last year?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(based on hypothetical $10,000 investment)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">FUND COST (PREVIOUS YEAR)</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><table cellpadding="0" cellspacing="0" style="border-collapse:collapse;border-style:none;" width="100%"><tr><td style="width:51%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> </td> <td style="width:21%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs of a $10,000 investment</span></div> </td> <td style="width:27%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">Costs paid as a percentage of a $10,000 investment </span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:51%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Limited Term Securitized Completion Fund</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div> </td> <td style="width:21%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"> </span>0<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span><span style="font-family:'Fidelity Sans';font-size:6px;color:#000000;font-style:normal;vertical-align:4px;font-weight:normal;">A</span></div> </td> <td style="width:27%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;">0.00<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span><span style="font-family:'Fidelity Sans';font-size:6px;color:#000000;font-style:normal;vertical-align:4px;font-weight:normal;">B</span></div> </td> <td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:6px;color:#000000;font-style:normal;vertical-align:4px;font-weight:normal;">A</span><span style="font-family:'Fidelity Sans Cd';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Amount represents less than $.50</span></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:6px;color:#000000;font-style:normal;vertical-align:4px;font-weight:normal;">B</span><span style="font-family:'Fidelity Sans Cd';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Amount represents less than 0.005%</span></div> <span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"></div> 0 0.0000 <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">What affected the Fund's performance this period?</span> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>U.S. taxable investment-grade bonds achieved a gain for the 12 months ending August 31, 2026, buoyed by three policy interest-rate cuts by the Federal Reserve in late 2025, but pulled down since then by rising bond yields amid higher consumer inflation, fast-growing government debt and heavy U.S. Treasury issuance.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Against this backdrop, investments in commercial mortgage-backed securities and residential mortgage-backed securities contributed to the fund's performance versus the Limited Term Securitized Completion Index for the fiscal year. Each was a non-Composite allocation.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>An overweight in 30-year Ginnie Mae and conventional mortgage-backed securities boosted relative performance, as did a pay-fixed position in two-year interest-rate swaps.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>In contrast, underweights in auto and consumer asset-backed securities detracted versus the Composite index for the 12 months.</span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>An underweight in 15- and 20-year mortgage-backed securities hurt relative performance. </span></div> <div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">•<span style="padding-right:10px"></span>Lastly, an overweight in Freddie Mac multifamily securities detracted the past 12 months.</span></div> <div style="text-align:left;text-align-last:auto;"></div> How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE May 30, 2024 through August 31, 2026. Initial investment of $10,000. Fidelity® Limited Term Securitized Completion Fund $10,000 $10,317 $10,879 Fidelity Limited Term Securitized Completion Fund Composite Blended Index $10,000 $10,316 $10,869 Bloomberg US Fixed Rate Asset-Backed Securities Index $10,000 $10,317 $10,834 Bloomberg U.S. Aggregate Bond Index $10,000 $10,516 $10,846   2024 2025 2026   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Limited Term Securitized Completion Fund</span> 10000 10317 10879 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Limited Term Securitized Completion Fund Composite Blended Index</span> 10000 10316 10869 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg US Fixed Rate Asset-Backed Securities Index</span> 10000 10317 10834 <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span> 10000 10516 10846 AVERAGE ANNUAL TOTAL RETURNS:   1 Year Life of Fund A Fidelity® Limited Term Securitized Completion Fund 3.51% 5.41% Fidelity Limited Term Securitized Completion Fund Composite Blended Index 3.04% 5.15% Bloomberg US Fixed Rate Asset-Backed Securities Index 3.07% 5.02% Bloomberg U.S. Aggregate Bond Index 1.89% 4.53% A   From May 30, 2024   Visit www.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. 0.0351 0.0541 0.0304 0.0515 0.0307 0.0502 0.0189 0.0453 2024-05-30 <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Visit </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">www.fidelity.com</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> for more recent performance information.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.</span> <span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">Key Fund Statistics</span> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">(as of August 31, 2026)</span></div> <div><span style="font-size:11px;"> </span></div><div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:right;text-align-last:auto;"><table cellpadding="0" cellspacing="1" style="border-collapse:separate;border-style:none;margin:auto;" width="100%"><tr><td style="width:63%; " valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;">KEY FACTS</span></div> <div style="text-align:left;text-align-last:auto;"></div> <div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"> <span> </span></span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:32%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Fund Size</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>139,336,958</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Number of Holdings</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">419</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Total Advisory Fee</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span>0</div> <div style="text-align:right;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="middle"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> <tr><td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Portfolio Turnover</span></div> </td> <td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:right;text-align-last:auto;">155<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">%</span></div> <div style="text-align:left;text-align-last:auto;"></div> </td> <td style="width:5%; " valign="top"><span style="line-height:11px;"> </span><div style="text-align:left;text-align-last:auto;"></div> </td> </tr> </table> </div> <div style="text-align:left;text-align-last:auto;"></div> 139336958 419 0 1.55   U.S. Government and U.S. Government Agency Obligations 17.5 AAA 49.5 AA 7.0 A 1.0 Not Rated 29.0 QUALITY DIVERSIFICATION (% of Fund's net assets)     U.S. Government and U.S. Government Agency Obligations - 17.5   AAA - 49.5                                 AA - 7.0                                   A - 1.0                                    Not Rated - 29.0                         Short-Term Investments and Net Other Assets (Liabilities) - (4.0)%   We have used ratings from Moody's Investors Service, Inc. Where Moody's® ratings are not available, we have used S&P® ratings. All ratings are as of the date indicated and do not reflect subsequent changes.         Asset-Backed Securities 47.5 CMOs and Other Mortgage Related Securities 38.5 U.S. Government Agency - Mortgage Securities 13.6 U.S. Treasury Obligations 3.9 Options 0.5 ASSET ALLOCATION (% of Fund's net assets)     Asset-Backed Securities - 47.5             CMOs and Other Mortgage Related Securities - 38.5   U.S. Government Agency - Mortgage Securities - 13.6   U.S. Treasury Obligations - 3.9            Options - 0.5                            Short-Term Investments and Net Other Assets (Liabilities) - (4.0)%   United States 99.5 Canada 0.5 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)     United States - 99.5                       Canada - 0.5                                   0.175 0.495 0.070 0.010 0.290 0.475 0.385 0.136 0.039 0.005 0.995 0.005 TOP HOLDINGS(% of Fund's net assets)     Fannie Mae Mortgage pass-thru certificates 6.1   Uniform Mortgage Backed Securities 3.8   Freddie Mac Gold Pool 3.8   US Treasury Notes 3.1   Freddie Mac Multifamily Structured pass-thru certificates 2.9   Stellantis Financial Underwritten Enhanced Lease Trust 2.9   OneMain Financial Issuance Trust 1.9   Wheels Fleet Lease Funding LLC 1.9   Exeter Select Automobile Receivables Trust 1.8   GMF Floorplan Owner Revolving Trust 1.8     30.0   0.061 0.038 0.038 0.031 0.029 0.029 0.019 0.019 0.018 0.018