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Fidelity Salem Street Trust
2026-07-31
Fidelity® SAI U.S. Value Index Fund
Fidelity® SAI U.S. Value Index Fund
FSWCX
This annual shareholder report contains information about Fidelity® SAI U.S. Value Index Fund for the period August 1, 2025 to July 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 1-800-544-3455 or by sending an e-mail to fidfunddocuments@fidelity.com.
fundresearch.fidelity.com/prospectus/sec
1-800-544-3455
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 $10,000 investment </span></div>
</td>
<td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div>
</td>
</tr>
<tr><td style="width:51%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® SAI U.S. Value Index Fund</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div>
</td>
<td style="width:21%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"> </span>13<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;">0.11<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>
13
0.0011
<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. stocks achieved a strong gain for the 12 months ending July 31, 2026, reflecting enthusiasm for artificial intelligence, strong corporate fundamentals, a resilient economy and, beginning in September, the Federal Reserve's first interest-rate reductions since December 2024.</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 information technology sector gained about 49% and contributed most to the fund's performance for the fiscal year, driven by the semiconductors & semiconductor equipment industry (+105%). Health care, which rose 56%, also helped, as did financials, which advanced roughly 27%. The energy sector was up 47%, while industrials increased 47% and consumer discretionary advanced 19%. Other contributors included materials (+35%), consumer staples (+13%), communication services (+6%) and utilities (+32%) stocks.</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, real estate returned -14% and detracted most. This group was hampered by the equity real estate investment trusts industry (-14%).</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>Turning to individual holdings, the biggest contributor was Micron Technology (+630%), from the semiconductors & semiconductor equipment category. UnitedHealth (+72%), within the health care equipment & services industry, also helped. Apple (+50%), a stock in the technology hardware & equipment industry, boosted the fund as well. In energy, Exxon Mobil gained roughly 33% and further contributed. Lastly, Bank of America (+34%), from the banks category, also helped.</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>Conversely, the biggest detractor was Accenture (-31%), from the software & services group. Within the same industry, Salesforce (-13%) and Adobe (-25%) hindered the fund. Lastly, Comcast (-20%) and AT&T (-11%), within the telecommunication services industry, also hurt.</span></div>
<div style="text-align:left;text-align-last:auto;"></div>
How did the Fund perform over the life of Fund?
CUMULATIVE PERFORMANCE
December 19, 2017 through July 31, 2026.
Initial investment of $10,000.
Fidelity® SAI U.S. Value Index Fund
$10,000
$10,367
$10,431
$9,375
$13,348
$14,044
$14,991
$17,716
$19,237
$26,182
Fidelity U.S. Value Focus Index℠
$10,000
$10,382
$10,441
$9,377
$13,369
$14,083
$15,064
$17,800
$19,341
$26,358
S&P 500® Index
$10,000
$10,621
$11,469
$12,841
$17,520
$16,708
$18,882
$23,064
$26,831
$32,080
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® SAI U.S. Value Index Fund</span>
10000
10367
10431
9375
13348
14044
14991
17716
19237
26182
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity U.S. Value Focus Index℠</span>
10000
10382
10441
9377
13369
14083
15064
17800
19341
26358
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>
10000
10621
11469
12841
17520
16708
18882
23064
26831
32080
AVERAGE ANNUAL TOTAL RETURNS:
1 Year
5 Year
Life of Fund A
Fidelity® SAI U.S. Value Index Fund
36.11%
14.42%
11.81%
Fidelity U.S. Value Focus Index℠
36.28%
14.54%
11.90%
S&P 500® Index
19.56%
12.86%
14.48%
A From December 19, 2017
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.
0.3611
0.1442
0.1181
0.3628
0.1454
0.1190
0.1956
0.1286
0.1448
2017-12-19
<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 July 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>9,446,307,148</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;">204</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>7,303,999</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;">60<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>
9446307148
204
7303999
0.60
MARKET SECTORS
(% of Fund's net assets)
Information Technology
25.5
Financials
21.7
Energy
12.6
Health Care
12.5
Communication Services
10.3
Consumer Discretionary
4.3
Consumer Staples
4.2
Materials
3.8
Industrials
3.7
Utilities
0.9
Real Estate
0.3
Common Stocks
99.8
Short-Term Investments and Net Other Assets (Liabilities)
0.2
ASSET ALLOCATION (% of Fund's net assets)
Common Stocks - 99.8
Short-Term Investments and Net Other Assets (Liabilities) - 0.2
United States
99.0
Switzerland
0.6
Australia
0.3
Bermuda
0.1
GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)
United States - 99.0
Switzerland - 0.6
Australia - 0.3
Bermuda - 0.1
0.255
0.217
0.126
0.125
0.103
0.043
0.042
0.038
0.037
0.009
0.003
0.998
0.002
0.990
0.006
0.003
0.001
TOP HOLDINGS(% of Fund's net assets)
NVIDIA Corp
3.8
Bank of America Corp
3.6
Micron Technology Inc
3.6
Chevron Corp
3.6
Apple Inc
3.2
Microsoft Corp
2.9
Wells Fargo & Co
2.6
Alphabet Inc Class A
2.3
Citigroup Inc
2.2
Verizon Communications Inc
1.9
29.7
0.038
0.036
0.036
0.036
0.032
0.029
0.026
0.023
0.022
0.019
2026-07-31
This report describes changes to the Fund that occurred during the reporting period.
Fidelity® SAI U.S. Quality Index Fund
Fidelity® SAI U.S. Quality Index Fund
FUQIX
This annual shareholder report contains information about Fidelity® SAI U.S. Quality Index Fund for the period August 1, 2025 to July 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 1-800-544-3455 or by sending an e-mail to fidfunddocuments@fidelity.com.
fundresearch.fidelity.com/prospectus/sec
1-800-544-3455
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 $10,000 investment </span></div>
</td>
<td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div>
</td>
</tr>
<tr><td style="width:51%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® SAI U.S. Quality Index Fund</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div>
</td>
<td style="width:21%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"> </span>12<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;">0.11<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>
12
0.0011
<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. stocks achieved a strong gain for the 12 months ending July 31, 2026, reflecting enthusiasm for artificial intelligence, strong corporate fundamentals, a resilient economy and, beginning in September, the Federal Reserve's first interest-rate reductions since December 2024.</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 information technology sector gained roughly 27% and contributed most to the fund's performance for the fiscal year. Health care stocks also helped (+38%), benefiting from the pharmaceuticals, biotechnology & life sciences industry (+50%). Communication services stocks rose 10%, boosted by the media & entertainment industry (+10%), consumer staples were up roughly 13%, lifted by the food, beverage & tobacco industry (+37%), and financials advanced about 1%. Other contributors included the energy (+39%), real estate (+7%) and materials (+49%) sectors.</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>Conversely, industrials returned -3% and detracted most. This group was hampered by the commercial & professional services industry (-18%). Consumer discretionary (-3%) also hurt, pressured by consumer services (-5%) firms.</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>Turning to individual stocks, the biggest contributor was Alphabet (+92%), from the media & entertainment industry. Apple (+49%), a stock in the technology hardware & equipment industry, helped as well. Lam Research (+206%) and Applied Materials (+103%), within the semiconductors & semiconductor equipment industry, further contributed. Lastly, Eli Lilly, within the pharmaceuticals, biotechnology & life sciences group, gained 56% and boosted the fund.</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 biggest detractor was Meta Platforms (-28%), from the media & entertainment category. From the same group, AppLovin (-39%) and Trade Desk (-79%) also hurt the fund. Lastly, in software & services, Microsoft (-12%) and Adobe (-30%) weighed on the fund's performance as well.</span></div>
<div style="text-align:left;text-align-last:auto;"></div>
How did the Fund perform over the past 10 years?
CUMULATIVE PERFORMANCE
July 31, 2016 through July 31, 2026.
Initial investment of $10,000.
Fidelity® SAI U.S. Quality Index Fund
$10,000
$11,470
$13,845
$15,188
$18,246
$24,203
$22,617
$26,002
$32,725
$37,363
$43,741
Fidelity SAI U.S. Quality Index Fund Linked Index℠
$10,000
$11,496
$13,893
$15,251
$18,325
$24,321
$22,722
$26,170
$32,910
$37,680
$44,334
Fidelity U.S. Quality Focus Index℠
$10,000
$11,470
$13,845
$15,204
$18,268
$24,246
$22,651
$26,088
$32,808
$37,563
$44,196
S&P 500® Index
$10,000
$11,604
$13,489
$14,566
$16,308
$22,251
$21,219
$23,980
$29,292
$34,076
$40,742
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® SAI U.S. Quality Index Fund</span>
10000
11470
13845
15188
18246
24203
22617
26002
32725
37363
43741
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity SAI U.S. Quality Index Fund Linked Index℠</span>
10000
11496
13893
15251
18325
24321
22722
26170
32910
37680
44334
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity U.S. Quality Focus Index℠</span>
10000
11470
13845
15204
18268
24246
22651
26088
32808
37563
44196
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>
10000
11604
13489
14566
16308
22251
21219
23980
29292
34076
40742
AVERAGE ANNUAL TOTAL RETURNS:
1 Year
5 Year
10 Year
Fidelity® SAI U.S. Quality Index Fund
17.07%
12.57%
15.90%
Fidelity SAI U.S. Quality Index Fund Linked Index℠
17.66%
12.76%
16.06%
Fidelity U.S. Quality Focus Index℠ A
17.66%
12.76%
n/a
S&P 500® Index
19.56%
12.86%
15.08%
A From October 22, 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.
0.1707
0.1257
0.1590
0.1766
0.1276
0.1606
0.1766
0.1276
0.1956
0.1286
0.1508
2018-10-22
<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 July 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>35,741,871,182</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;">105</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>27,324,145</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;">37<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>
35741871182
105
27324145
0.37
MARKET SECTORS
(% of Fund's net assets)
Information Technology
38.9
Financials
16.0
Health Care
13.9
Consumer Staples
9.5
Communication Services
8.0
Industrials
7.3
Consumer Discretionary
4.4
Real Estate
1.6
Energy
0.2
Common Stocks
99.8
Short-Term Investments and Net Other Assets (Liabilities)
0.2
ASSET ALLOCATION (% of Fund's net assets)
Common Stocks - 99.8
Short-Term Investments and Net Other Assets (Liabilities) - 0.2
United States
100.0
GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)
United States - 100.0
0.389
0.160
0.139
0.095
0.080
0.073
0.044
0.016
0.002
0.998
0.002
1.000
TOP HOLDINGS(% of Fund's net assets)
Apple Inc
9.2
Microsoft Corp
8.0
Eli Lilly & Co
4.3
Visa Inc Class A
4.3
NVIDIA Corp
4.2
Mastercard Inc Class A
4.1
AbbVie Inc
3.9
Applied Materials Inc
3.5
Coca-Cola Co/The
3.3
Procter & Gamble Co/The
3.3
48.1
0.092
0.080
0.043
0.043
0.042
0.041
0.039
0.035
0.033
0.033
<div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">How has the Fund changed?</span></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;"> </span></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;">This is a summary of certain changes to the Fund since August 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by September 29, 2026 at </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> or upon request at </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-544-3455</span><span style="font-family:'Fidelity Sans';font-size:0px;color:#000000;font-style:normal;font-weight:normal;"> </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> or by sending an e-mail to </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span><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>
<span style="line-height:11px;"> </span><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:50%; background-color:#ebf3e9;border-right:2px dashed #368627;padding:19px 19px 19px 19px;" valign="top"><div style="text-align:left;text-align-last:auto;">
<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;">The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:</span></div>
<ul style="color:#000000;list-style-type:disc;margin:0px 0px 0px 25px;padding:0px;"><li style="margin:5px 0px 2px 24px;padding:0px 0px 0px 0px;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Operating expenses</span></li></ul>
<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></div>
<div style="text-align:left;text-align-last:auto;"></div>
</td>
<td style="width:50%; background-color:#ebf3e9;padding:19px 19px 19px 19px;" valign="top"><div style="text-align:left;text-align-last:auto;"></div>
</td>
</tr>
</table>
</div>
<div style="text-align:left;text-align-last:auto;"></div>
<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">This is a summary of certain changes to the Fund since August 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by September 29, 2026 at </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> or upon request at </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-544-3455</span><span style="font-family:'Fidelity Sans';font-size:0px;color:#000000;font-style:normal;font-weight:normal;"> </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> or by sending an e-mail to </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span><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:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>
<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-544-3455</span>
<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</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;">The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:</span></div>
<ul style="color:#000000;list-style-type:disc;margin:0px 0px 0px 25px;padding:0px;"><li style="margin:5px 0px 2px 24px;padding:0px 0px 0px 0px;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Operating expenses</span></li></ul>
<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>
2026-07-31
This report describes changes to the Fund that occurred during the reporting period.
Fidelity® SAI U.S. Momentum Index Fund
Fidelity® SAI U.S. Momentum Index Fund
FUMIX
This annual shareholder report contains information about Fidelity® SAI U.S. Momentum Index Fund for the period August 1, 2025 to July 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 1-800-544-3455 or by sending an e-mail to fidfunddocuments@fidelity.com.
fundresearch.fidelity.com/prospectus/sec
1-800-544-3455
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 $10,000 investment </span></div>
</td>
<td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div>
</td>
</tr>
<tr><td style="width:51%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® SAI U.S. Momentum Index Fund</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div>
</td>
<td style="width:21%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"> </span>12<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;">0.10<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>
12
0.0010
<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. stocks achieved a strong gain for the 12 months ending July 31, 2026, reflecting enthusiasm for artificial intelligence, strong corporate fundamentals, a resilient economy and, beginning in September, the Federal Reserve's first interest-rate reductions since December 2024.</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 information technology sector gained about 48% and contributed most to the fund's performance for the fiscal year. Industrials, which advanced roughly 15%, also helped, benefiting from the capital goods industry (+23%), as did financials, rising about 18%. The health care sector was up 25%, boosted by the pharmaceuticals, biotechnology & life sciences industry (+34%), while consumer discretionary gained 8% and communication services advanced 7%. Other contributors included energy (+17%), materials (+58%), consumer staples (+34%), real estate (+31%) and utilities (+14%) stocks.</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>On an individual basis, the biggest contributor was Micron Technology (+126%), from the semiconductors & semiconductor equipment category. Within the same group, Advanced Micro Devices gained roughly 265% and boosted the fund as well. Alphabet (+47%), a stock in the media & entertainment industry, also helped. Lastly, Cisco Systems (+70%) and Western Digital (+584%), within the technology hardware & equipment industry, further aided 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>In contrast, the biggest detractor was Microsoft (-4%), from the software & services group. Within the same category, Strategy returned about -37% and hurt as well. In media & entertainment, Netflix (-19%) also weighed on performance. Another notable detractor was Exxon Mobil (-14%), a stock in the energy sector. Lastly, Uber Technologies (-16%), from the transportation group, also hurt.</span></div>
<div style="text-align:left;text-align-last:auto;"></div>
How did the Fund perform over the life of Fund?
CUMULATIVE PERFORMANCE
February 9, 2017 through July 31, 2026.
Initial investment of $10,000.
Fidelity® SAI U.S. Momentum Index Fund
$10,000
$10,980
$13,432
$14,363
$16,770
$22,301
$19,835
$21,024
$28,399
$34,738
Fidelity U.S. Momentum Linked Index
$10,000
$11,002
$13,464
$14,416
$16,851
$22,435
$19,974
$21,212
$28,645
$35,076
Fidelity U.S. Large Cap Momentum Focus Index℠
$10,000
$10,980
$13,432
$14,363
$16,770
$22,301
$19,835
$21,024
$28,399
$34,738
MSCI USA Custom Momentum Composite Index
$10,000
$10,980
$13,432
$14,363
$16,770
$22,301
$19,835
$21,024
$28,399
$34,738
MSCI USA Index
$10,000
$10,768
$12,450
$13,375
$15,041
$20,620
$19,123
$21,529
$26,154
$30,471
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
Effective October 31, 2025, the fund began comparing its performance to Fidelity U.S. Large Cap Momentum Focus IndexSM rather than MSCI USA Custom Momentum Composite Index because the Fidelity U.S. Large Cap Momentum Focus IndexSM conforms more closely to the fund's investment policies.
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® SAI U.S. Momentum Index Fund</span>
10000
10980
13432
14363
16770
22301
19835
21024
28399
34738
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity U.S. Momentum Linked Index</span>
10000
11002
13464
14416
16851
22435
19974
21212
28645
35076
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity U.S. Large Cap Momentum Focus Index℠</span>
10000
10980
13432
14363
16770
22301
19835
21024
28399
34738
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI USA Custom Momentum Composite Index</span>
10000
10980
13432
14363
16770
22301
19835
21024
28399
34738
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI USA Index</span>
10000
10768
12450
13375
15041
20620
19123
21529
26154
30471
AVERAGE ANNUAL TOTAL RETURNS:
1 Year
5 Year
Life of Fund A
Fidelity® SAI U.S. Momentum Index Fund
26.00%
14.44%
16.86%
Fidelity U.S. Momentum Linked Index
26.00%
14.52%
16.98%
Fidelity U.S. Large Cap Momentum Focus Index℠ B
n/a
n/a
n/a
MSCI USA Custom Momentum Composite Index
26.38%
14.59%
17.01%
MSCI USA Index
18.68%
11.89%
14.53%
A From February 9,2017
B From September 5, 2025
Effective October 31, 2025, the fund began comparing its performance to Fidelity U.S. Large Cap Momentum Focus IndexSM rather than MSCI USA Custom Momentum Composite Index because the Fidelity U.S. Large Cap Momentum Focus IndexSM conforms more closely to the fund's investment policies.
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.
0.2600
0.1444
0.1686
0.2600
0.1452
0.1698
0.2638
0.1459
0.1701
0.1868
0.1189
0.1453
2017-02-09
2025-09-05
<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 July 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>2,479,737,840</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;">189</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>5,663,676</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;">196<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>
2479737840
189
5663676
1.96
MARKET SECTORS
(% of Fund's net assets)
Information Technology
39.4
Industrials
14.8
Communication Services
9.1
Financials
8.3
Health Care
7.6
Energy
7.6
Consumer Discretionary
4.7
Real Estate
2.6
Materials
2.2
Utilities
1.9
Consumer Staples
1.7
Common Stocks
99.9
Short-Term Investments and Net Other Assets (Liabilities)
0.1
ASSET ALLOCATION (% of Fund's net assets)
Common Stocks - 99.9
Short-Term Investments and Net Other Assets (Liabilities) - 0.1
United States
99.4
Australia
0.2
United Kingdom
0.2
Thailand
0.1
Bermuda
0.1
GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)
United States - 99.4
Australia - 0.2
United Kingdom - 0.2
Thailand - 0.1
Bermuda - 0.1
0.394
0.148
0.091
0.083
0.076
0.076
0.047
0.026
0.022
0.019
0.017
0.999
0.001
0.994
0.002
0.002
0.001
0.001
TOP HOLDINGS(% of Fund's net assets)
Alphabet Inc Class A
8.9
NVIDIA Corp
4.4
Johnson & Johnson
4.2
Micron Technology Inc
4.0
Apple Inc
3.7
Applied Materials Inc
3.1
Cisco Systems Inc
3.0
Caterpillar Inc
2.9
Chevron Corp
2.9
Lam Research Corp
2.8
39.9
0.089
0.044
0.042
0.040
0.037
0.031
0.030
0.029
0.029
0.028
<div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">How has the Fund changed?</span></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;"> </span></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;">This is a summary of certain changes to the Fund since August 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by September 29, 2026 at </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> or upon request at </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-544-3455</span><span style="font-family:'Fidelity Sans';font-size:0px;color:#000000;font-style:normal;font-weight:normal;"> </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> or by sending an e-mail to </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span><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>
<span style="line-height:11px;"> </span><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:50%; background-color:#ebf3e9;border-right:2px dashed #368627;padding:19px 19px 19px 19px;" valign="top"><div style="text-align:left;text-align-last:auto;">
<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;">The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:</span></div>
<ul style="color:#000000;list-style-type:disc;margin:0px 0px 0px 25px;padding:0px;"><li style="margin:5px 0px 2px 24px;padding:0px 0px 0px 0px;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Operating expenses</span></li></ul>
<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></div>
<div style="text-align:left;text-align-last:auto;"></div>
</td>
<td style="width:50%; background-color:#ebf3e9;padding:19px 19px 19px 19px;" valign="top"><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;">The fund modified its principal investment strategies during the reporting period.</span>
<div style="text-align:left;text-align-last:auto;"><br/></div></div>
<div style="text-align:left;text-align-last:auto;"></div>
</td>
</tr>
<tr><td style="width:50%; background-color:#ebf3e9;border-right:2px dashed #368627;padding:19px 19px 19px 19px;" valign="top"><div style="text-align:left;text-align-last:auto;">
<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;">The fund modified its principal investment risks during the reporting period.</span></div>
<div style="text-align:left;text-align-last:auto;"></div></div>
<div style="text-align:left;text-align-last:auto;"></div>
</td>
<td style="width:50%; background-color:#ebf3e9;padding:19px 19px 19px 19px;" valign="top"><div style="text-align:left;text-align-last:auto;"></div>
</td>
</tr>
</table>
</div>
<div style="text-align:left;text-align-last:auto;"></div>
<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">This is a summary of certain changes to the Fund since August 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by September 29, 2026 at </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> or upon request at </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-544-3455</span><span style="font-family:'Fidelity Sans';font-size:0px;color:#000000;font-style:normal;font-weight:normal;"> </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> or by sending an e-mail to </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span><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:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>
<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-544-3455</span>
<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</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;">The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:</span></div>
<ul style="color:#000000;list-style-type:disc;margin:0px 0px 0px 25px;padding:0px;"><li style="margin:5px 0px 2px 24px;padding:0px 0px 0px 0px;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Operating expenses</span></li></ul>
<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>
<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The fund modified its principal investment strategies during the reporting period.</span>
<div style="text-align:left;text-align-last:auto;"><br/></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;">The fund modified its principal investment risks during the reporting period.</span></div>
<div style="text-align:left;text-align-last:auto;"></div>
2026-07-31
This report describes changes to the Fund that occurred during the reporting period.
Fidelity® SAI U.S. Large Cap Index Fund
Fidelity® SAI U.S. Large Cap Index Fund
FLCPX
This annual shareholder report contains information about Fidelity® SAI U.S. Large Cap Index Fund for the period August 1, 2025 to July 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 1-800-544-3455 or by sending an e-mail to fidfunddocuments@fidelity.com.
fundresearch.fidelity.com/prospectus/sec
1-800-544-3455
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 $10,000 investment </span></div>
</td>
<td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div>
</td>
</tr>
<tr><td style="width:51%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® SAI U.S. Large Cap Index Fund</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div>
</td>
<td style="width:21%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"> </span>2<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;">0.02<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>
2
0.0002
<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. stocks achieved a strong gain for the 12 months ending July 31, 2026, reflecting enthusiasm for artificial intelligence, strong corporate fundamentals, a resilient economy and, beginning in September, the Federal Reserve's first interest-rate reductions since December 2024.</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, information technology gained approximately 26% and contributed most to the fund's performance for the fiscal year. Health care, which gained 27%, also helped, benefiting from the pharmaceuticals, biotechnology & life sciences industry (+40%), as did industrials, which advanced 20%, lifted by the capital goods industry (+25%). The communication services sector rose roughly 17%, boosted by the media & entertainment industry (+20%), while financials gained about 10% and energy advanced 41%. Other contributors included the consumer discretionary (+7%), consumer staples (+10%), real estate (+14%), materials (+14%) and utilities (+6%) sectors.</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>Turning to individual stocks, the top contributor was Alphabet (+85%), from the media & entertainment category. In technology hardware & equipment, Apple (+49%) helped. Lastly, Micron Technology (+654%), NVIDIA (+12%) and Advanced Micro Devices (+170%), within the semiconductors & semiconductor equipment group, also boosted the fund.</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>Conversely, the biggest detractor was Microsoft (-12%), from the software & services industry. From the same industry, Oracle (-48%) and Intuit (-59%) hurt the fund. Lastly, in media & entertainment, Meta Platforms (-28%) and Netflix (-38%) also hurt the fund.</span></div>
<div style="text-align:left;text-align-last:auto;"></div>
How did the Fund perform over the past 10 years?
CUMULATIVE PERFORMANCE
July 31, 2016 through July 31, 2026.
Initial investment of $10,000.
Fidelity® SAI U.S. Large Cap Index Fund
$10,000
$11,603
$13,484
$14,560
$16,283
$22,216
$21,177
$23,926
$29,224
$33,993
$40,635
S&P 500® Index
$10,000
$11,604
$13,489
$14,566
$16,308
$22,251
$21,219
$23,980
$29,292
$34,076
$40,742
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® SAI U.S. Large Cap Index Fund</span>
10000
11603
13484
14560
16283
22216
21177
23926
29224
33993
40635
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>
10000
11604
13489
14566
16308
22251
21219
23980
29292
34076
40742
AVERAGE ANNUAL TOTAL RETURNS:
1 Year
5 Year
10 Year
Fidelity® SAI U.S. Large Cap Index Fund
19.54%
12.84%
15.05%
S&P 500® Index
19.56%
12.86%
15.08%
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.
0.1954
0.1284
0.1505
0.1956
0.1286
0.1508
<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 July 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>18,856,937,017</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;">507</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>2,323,565</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;">32<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>
18856937017
507
2323565
0.32
MARKET SECTORS
(% of Fund's net assets)
Information Technology
36.7
Financials
12.5
Communication Services
9.7
Consumer Discretionary
9.4
Health Care
9.1
Industrials
8.7
Consumer Staples
4.7
Energy
3.4
Utilities
2.1
Real Estate
1.9
Materials
1.7
Common Stocks
99.9
Short-Term Investments and Net Other Assets (Liabilities)
0.1
ASSET ALLOCATION (% of Fund's net assets)
Common Stocks - 99.9
Short-Term Investments and Net Other Assets (Liabilities) - 0.1
United States
99.8
Switzerland
0.1
Netherlands
0.1
GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)
United States - 99.8
Switzerland - 0.1
Netherlands - 0.1
0.367
0.125
0.097
0.094
0.091
0.087
0.047
0.034
0.021
0.019
0.017
0.999
0.001
0.998
0.001
0.001
TOP HOLDINGS(% of Fund's net assets)
NVIDIA Corp
7.5
Apple Inc
7.0
Microsoft Corp
5.5
Amazon.com Inc
4.1
Alphabet Inc Class A
3.3
Broadcom Inc
2.9
Alphabet Inc Class C
2.6
Meta Platforms Inc Class A
1.9
Berkshire Hathaway Inc Class B
1.6
JPMorgan Chase & Co
1.5
37.9
0.075
0.070
0.055
0.041
0.033
0.029
0.026
0.019
0.016
0.015
<div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">How has the Fund changed?</span></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;"> </span></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;">This is a summary of certain changes to the Fund since August 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by September 29, 2026 at </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> or upon request at </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-544-3455</span><span style="font-family:'Fidelity Sans';font-size:0px;color:#000000;font-style:normal;font-weight:normal;"> </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> or by sending an e-mail to </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span><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>
<span style="line-height:11px;"> </span><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:50%; background-color:#ebf3e9;border-right:2px dashed #368627;padding:19px 19px 19px 19px;" valign="top"><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;">The fund modified its classification allowing it to operate as a non-diversified fund if changes in the relative market capitalization or weightings of issuers in the fund's index cause the fund to become non-diversified, and its principal investment strategies and risks were updated to reflect the change during the reporting period.</span></div>
<div style="text-align:left;text-align-last:auto;"></div>
</td>
<td style="width:50%; background-color:#ebf3e9;padding:19px 19px 19px 19px;" valign="top"><div style="text-align:left;text-align-last:auto;"></div>
</td>
</tr>
</table>
</div>
<div style="text-align:left;text-align-last:auto;"></div>
<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">This is a summary of certain changes to the Fund since August 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by September 29, 2026 at </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> or upon request at </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-544-3455</span><span style="font-family:'Fidelity Sans';font-size:0px;color:#000000;font-style:normal;font-weight:normal;"> </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> or by sending an e-mail to </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span><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:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>
<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-544-3455</span>
<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>
2026-07-31
This report describes changes to the Fund that occurred during the reporting period.
Fidelity® SAI Small-Mid Cap Momentum Index Fund
Fidelity® SAI Small-Mid Cap Momentum Index Fund
FZFLX
This annual shareholder report contains information about Fidelity® SAI Small-Mid Cap Momentum Index Fund for the period August 1, 2025 to July 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 1-800-544-3455 or by sending an e-mail to fidfunddocuments@fidelity.com.
fundresearch.fidelity.com/prospectus/sec
1-800-544-3455
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 $10,000 investment </span></div>
</td>
<td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div>
</td>
</tr>
<tr><td style="width:51%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® SAI Small-Mid Cap Momentum Index Fund</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div>
</td>
<td style="width:21%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"> </span>6<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;">0.05<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>
6
0.0005
<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. stocks achieved a strong gain for the 12 months ending July 31, 2026, reflecting enthusiasm for artificial intelligence, strong corporate fundamentals, a resilient economy and, beginning in September, the Federal Reserve's first interest-rate reductions since December 2024.</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, information technology gained roughly 92% and contributed most to the fund's performance for the fiscal year, driven by the technology hardware & equipment industry (+180%). Industrials, which gained approximately 32%, also helped, benefiting from the capital goods industry (+37%), as did health care, which advanced 40%, lifted by the pharmaceuticals, biotechnology & life sciences industry (+50%). The financials sector rose 15%, while consumer discretionary gained 14% and energy advanced about 36%. Other contributors included the real estate (+28%), communication services (+21%), consumer staples (+25%) and utilities (+6%) sectors.</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>Conversely, materials returned about -4% and detracted most.</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>Turning to individual stocks, the biggest contributor was Sandisk (+1770%), from the technology hardware & equipment industry. Within the same category, Ciena (+499%), Lumentum Holdings (+773%) and Flex (+178%) boosted the fund. Lastly, Comfort Systems USA (+182%), a stock in the capital goods industry, also contributed.</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 biggest detractor was Applied Optoelectronics (-50%), from the technology hardware & equipment industry. In commercial & professional services, Planet Labs PBC returned -51% and hurt the fund's performance. Modine Manufacturing (-32%), from the capital goods group, hurt the fund. Another notable detractor was Guidewire Software (-44%), a stock in the software & services category. Lastly, in financial services, Affirm Holdings returned roughly -25% and also hurt the fund.</span></div>
<div style="text-align:left;text-align-last:auto;"></div>
How did the Fund perform over the past 10 years?
CUMULATIVE PERFORMANCE
July 31, 2016 through July 31, 2026.
Initial investment of $10,000.
Fidelity® SAI Small-Mid Cap Momentum Index Fund
$10,000
$11,241
$13,029
$13,715
$13,711
$20,154
$18,353
$19,880
$22,301
$24,064
$32,474
Fidelity SAI Small-Mid Cap Linked Index℠
$10,000
$11,245
$13,058
$13,746
$13,746
$20,218
$18,418
$19,925
$22,358
$24,121
$32,514
Fidelity U.S. Small-Mid Cap Momentum Focus Index℠
$10,000
$11,241
$13,029
$13,715
$13,711
$20,154
$18,353
$19,880
$22,301
$24,064
$33,545
Russell SMID 500™ Index
$10,000
$11,241
$13,029
$13,715
$13,711
$20,154
$18,353
$19,880
$22,301
$24,064
$30,936
Russell 3000® Index
$10,000
$11,614
$13,517
$14,470
$16,052
$22,268
$20,631
$23,240
$28,138
$32,551
$38,932
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
Effective December 22, 2025, the fund began comparing its performance to Fidelity U.S.Small-Mid Cap Momentum Focus IndexSM rather than Russell SMID 500TM Index because the Fidelity U.S. Small-Mid Cap Momentum Focus IndexSM conforms more closely to the fund's investment policies.
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® SAI Small-Mid Cap Momentum Index Fund</span>
10000
11241
13029
13715
13711
20154
18353
19880
22301
24064
32474
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity SAI Small-Mid Cap Linked Index℠</span>
10000
11245
13058
13746
13746
20218
18418
19925
22358
24121
32514
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity U.S. Small-Mid Cap Momentum Focus Index℠</span>
10000
11241
13029
13715
13711
20154
18353
19880
22301
24064
33545
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell SMID 500™ Index</span>
10000
11241
13029
13715
13711
20154
18353
19880
22301
24064
30936
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 3000® Index</span>
10000
11614
13517
14470
16052
22268
20631
23240
28138
32551
38932
AVERAGE ANNUAL TOTAL RETURNS:
1 Year
5 Year
10 Year
Fidelity® SAI Small-Mid Cap Momentum Index Fund
34.95%
10.01%
12.50%
Fidelity SAI Small-Mid Cap Linked Index℠
34.80%
9.97%
12.51%
Fidelity U.S. Small-Mid Cap Momentum Focus Index℠ A
n/a
n/a
n/a
Russell SMID 500™ Index
28.26%
8.88%
11.96%
Russell 3000® Index
19.60%
11.82%
14.56%
A From September 8, 2025
Effective December 22, 2025, the fund began comparing its performance to Fidelity U.S.Small-Mid Cap Momentum Focus IndexSM rather than Russell SMID 500TM Index because the Fidelity U.S. Small-Mid Cap Momentum Focus IndexSM conforms more closely to the fund's investment policies.
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.
0.3495
0.1001
0.1250
0.3480
0.0997
0.1251
0.2826
0.0888
0.1196
0.1960
0.1182
0.1456
2025-09-08
<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 July 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>4,163,231,694</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;">304</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>2,388,942</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;">180<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>
4163231694
304
2388942
1.80
MARKET SECTORS
(% of Fund's net assets)
Industrials
22.5
Information Technology
17.9
Financials
13.0
Health Care
11.6
Energy
10.3
Consumer Discretionary
6.6
Real Estate
6.3
Communication Services
4.2
Materials
3.3
Utilities
2.3
Consumer Staples
1.8
Common Stocks
99.8
Short-Term Investments and Net Other Assets (Liabilities)
0.2
ASSET ALLOCATION (% of Fund's net assets)
Common Stocks - 99.8
Short-Term Investments and Net Other Assets (Liabilities) - 0.2
United States
95.9
Thailand
1.1
Bermuda
1.0
Puerto Rico
0.7
Singapore
0.3
Switzerland
0.3
Monaco
0.2
Norway
0.2
Canada
0.2
Others
0.1
GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)
United States - 95.9
Thailand - 1.1
Bermuda - 1.0
Puerto Rico - 0.7
Singapore - 0.3
Switzerland - 0.3
Monaco - 0.2
Norway - 0.2
Canada - 0.2
Others - 0.1
0.225
0.179
0.130
0.116
0.103
0.066
0.063
0.042
0.033
0.023
0.018
0.998
0.002
0.959
0.011
0.010
0.007
0.003
0.003
0.002
0.002
0.002
0.001
TOP HOLDINGS(% of Fund's net assets)
nVent Electric PLC
1.4
Viking Holdings Ltd
1.3
Roku Inc Class A
1.3
Permian Resources Holdings Inc/DE Class A
1.3
TD SYNNEX Corp
1.2
RBC Bearings Inc
1.2
Loews Corp
1.2
Host Hotels & Resorts Inc
1.2
Clean Harbors Inc
1.2
Lattice Semiconductor Corp
1.2
12.5
0.014
0.013
0.013
0.013
0.012
0.012
0.012
0.012
0.012
0.012
<div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;">How has the Fund changed?</span></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;"> </span></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;">This is a summary of certain changes to the Fund since August 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by September 29, 2026 at </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> or upon request at </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-544-3455</span><span style="font-family:'Fidelity Sans';font-size:0px;color:#000000;font-style:normal;font-weight:normal;"> </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> or by sending an e-mail to </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span><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>
<span style="line-height:11px;"> </span><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:50%; background-color:#ebf3e9;border-right:2px dashed #368627;padding:19px 19px 19px 19px;" valign="top"><div style="text-align:left;text-align-last:auto;">
<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;">The fund's name changed from Fidelity® SAI Small-Mid Cap 500 Index Fund to Fidelity® SAI Small-Mid Cap Momentum Index Fund.</span></div>
<div style="text-align:left;text-align-last:auto;"></div></div>
<div style="text-align:left;text-align-last:auto;"></div>
</td>
<td style="width:50%; background-color:#ebf3e9;padding:19px 19px 19px 19px;" valign="top"><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;">The fund modified its investment objective during the reporting period.</span>
<div style="text-align:left;text-align-last:auto;"><br/></div></div>
<div style="text-align:left;text-align-last:auto;"></div>
</td>
</tr>
<tr><td style="width:50%; background-color:#ebf3e9;border-right:2px dashed #368627;padding:19px 19px 19px 19px;" valign="top"><div style="text-align:left;text-align-last:auto;">
<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;">The fund modified its principal investment strategies during the reporting period.</span></div>
<div style="text-align:left;text-align-last:auto;"></div></div>
<div style="text-align:left;text-align-last:auto;"></div>
</td>
<td style="width:50%; background-color:#ebf3e9;padding:19px 19px 19px 19px;" valign="top"><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;">The fund modified its principal investment risks during the reporting period.</span>
<div style="text-align:left;text-align-last:auto;"><br/></div></div>
<div style="text-align:left;text-align-last:auto;"></div>
</td>
</tr>
</table>
</div>
<div style="text-align:left;text-align-last:auto;"></div>
<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">This is a summary of certain changes to the Fund since August 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by September 29, 2026 at </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> or upon request at </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-544-3455</span><span style="font-family:'Fidelity Sans';font-size:0px;color:#000000;font-style:normal;font-weight:normal;"> </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> or by sending an e-mail to </span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span><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:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>
<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-544-3455</span>
<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</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;">The fund's name changed from Fidelity® SAI Small-Mid Cap 500 Index Fund to Fidelity® SAI Small-Mid Cap Momentum Index Fund.</span></div>
<div style="text-align:left;text-align-last:auto;"></div>
<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The fund modified its investment objective during the reporting period.</span>
<div style="text-align:left;text-align-last:auto;"><br/></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;">The fund modified its principal investment strategies during the reporting period.</span></div>
<div style="text-align:left;text-align-last:auto;"></div>
<span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The fund modified its principal investment risks during the reporting period.</span>
<div style="text-align:left;text-align-last:auto;"><br/></div>
2026-07-31
Fidelity® SAI Real Estate Index Fund
Fidelity® SAI Real Estate Index Fund
FESIX
This annual shareholder report contains information about Fidelity® SAI Real Estate Index Fund for the period August 1, 2025 to July 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 1-800-544-3455 or by sending an e-mail to fidfunddocuments@fidelity.com.
fundresearch.fidelity.com/prospectus/sec
1-800-544-3455
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 $10,000 investment </span></div>
</td>
<td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div>
</td>
</tr>
<tr><td style="width:51%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® SAI Real Estate Index Fund</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div>
</td>
<td style="width:21%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"> </span>8<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;">0.07<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>
8
0.0007
<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. stocks achieved a strong gain for the 12 months ending July 31, 2026, reflecting enthusiasm for artificial intelligence, strong corporate fundamentals, a resilient economy and, beginning in September, the Federal Reserve's first interest-rate reductions since December 2024.</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, health care REITs gained approximately 37% and contributed most to the fund's performance for the fiscal year. The retail category, which rose approximately 31%, also helped, as did industrial REITs, which advanced approximately 35%. The data center industry was up 22%, while hotel & resorts gained 62%, and self storage REITs advanced 21%. Other contributors included the other specialized (+12%), multi-family residential (+6%), diversified (+21%), office (+10%), single-family residential (+4%) and timber (+3%) segments of the real estate market.</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, real estate services returned -26% and detracted most. Telecom tower (-17%) REITs also hurt. Other detractors were the integrated telecommunication services (-25%) and the real estate development (-3%) industries.</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>Turning to individual stocks, the top contributor was Welltower (+44%), from the health care category. From the same group, Ventas (+43%) helped as well. Among industrial REITs, Prologis gained 40% and boosted the fund. Simon Property, within the retail industry, rose about 47% and also contributed. Lastly, in data centers, Equinix (+33%) 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>Conversely, the biggest detractor was CoStar (-70%), from the real estate services industry. Within the same segment, Zillow (-57%) also hurt the fund's performance. Among telecom tower REITs, American Tower (-14%) and Crown Castle (-24%) hindered the fund. Lastly, in the other specialized category, VICI Properties (-14%) weighed on performance as well.</span></div>
<div style="text-align:left;text-align-last:auto;"></div>
How did the Fund perform over the past 10 years?
CUMULATIVE PERFORMANCE
July 31, 2016 through July 31, 2026.
Initial investment of $10,000.
Fidelity® SAI Real Estate Index Fund
$10,000
$9,440
$9,805
$10,863
$9,120
$12,743
$12,203
$11,023
$12,159
$12,457
$14,323
Fidelity Real Estate Linked Index℠
$10,000
$9,434
$9,798
$10,865
$9,094
$12,732
$12,194
$11,017
$12,199
$12,493
$14,361
MSCI US IMI Real Estate 25/25 Index
$10,000
$9,826
$10,277
$11,636
$11,045
$15,109
$14,471
$13,073
$14,476
$14,825
$17,042
S&P 500® Index
$10,000
$11,604
$13,489
$14,566
$16,308
$22,251
$21,219
$23,980
$29,292
$34,076
$40,742
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® SAI Real Estate Index Fund</span>
10000
9440
9805
10863
9120
12743
12203
11023
12159
12457
14323
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Real Estate Linked Index℠</span>
10000
9434
9798
10865
9094
12732
12194
11017
12199
12493
14361
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI US IMI Real Estate 25/25 Index</span>
10000
9826
10277
11636
11045
15109
14471
13073
14476
14825
17042
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>
10000
11604
13489
14566
16308
22251
21219
23980
29292
34076
40742
AVERAGE ANNUAL TOTAL RETURNS:
1 Year
5 Year
10 Year
Fidelity® SAI Real Estate Index Fund
14.98%
2.36%
3.66%
Fidelity Real Estate Linked Index℠
14.95%
2.44%
3.69%
MSCI US IMI Real Estate 25/25 Index A
14.95%
2.44%
n/a
S&P 500® Index
19.56%
12.86%
15.08%
A From September 1, 2016
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.
0.1498
0.0236
0.0366
0.1495
0.0244
0.0369
0.1495
0.0244
0.1956
0.1286
0.1508
2016-09-01
<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 July 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>212,230,713</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;">146</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>123,730</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;">15<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>
212230713
146
123730
0.15
TOP INDUSTRIES
(% of Fund's net assets)
Specialized REITs
31.3
Health Care REITs
17.0
Retail REITs
15.1
Industrial REITs
11.3
Residential REITs
10.8
Real Estate Management & Development
6.6
Hotel & Resort REITs
3.0
Office REITs
2.9
Diversified REITs
1.9
Common Stocks
99.9
Short-Term Investments and Net Other Assets (Liabilities)
0.1
ASSET ALLOCATION (% of Fund's net assets)
Common Stocks - 99.9
Short-Term Investments and Net Other Assets (Liabilities) - 0.1
United States
100.0
GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)
United States - 100.0
0.313
0.170
0.151
0.113
0.108
0.066
0.030
0.029
0.019
0.999
0.001
1.000
TOP HOLDINGS(% of Fund's net assets)
Welltower Inc
9.2
Prologis Inc
8.0
Equinix Inc
5.4
Simon Property Group Inc
4.7
American Tower Corp
4.1
Digital Realty Trust Inc
3.9
Realty Income Corp
3.6
Public Storage
3.4
CBRE Group Inc Class A
2.8
Ventas Inc
2.8
47.9
0.092
0.080
0.054
0.047
0.041
0.039
0.036
0.034
0.028
0.028
2026-07-31
Fidelity® Real Estate Index Fund
Fidelity® Real Estate Index Fund
FSRNX
This annual shareholder report contains information about Fidelity® Real Estate Index Fund for the period August 1, 2025 to July 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 $10,000 investment </span></div>
</td>
<td style="width:1%; " valign="top"><span style="line-height:12px;"> </span><div style="text-align:left;text-align-last:auto;"></div>
</td>
</tr>
<tr><td style="width:51%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"><div style="text-align:left;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Real Estate Index Fund</span><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"> </span></div>
</td>
<td style="width:21%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"><div style="text-align:center;text-align-last:auto;"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">$</span><span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"> </span>8<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;">0.07<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>
8
0.0007
<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. stocks achieved a strong gain for the 12 months ending July 31, 2026, reflecting enthusiasm for artificial intelligence, strong corporate fundamentals, a resilient economy and, beginning in September, the Federal Reserve's first interest-rate reductions since December 2024.</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, health care REITs gained about 37% and contributed most to the fund's performance for the fiscal year. The retail industry, which rose 31%, also helped, as did industrial, which advanced 35%. The data center group was up approximately 22%, while hotel & resorts gained 62%, and self-storage REITs advanced 21%. Other contributors included the other specialized (+12%), multi-family residential (+6%), diversified (+21%), office (+10%), single-family residential (+4%) and timber (+3%) categories.</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>Conversely, real estate services returned -26% and detracted most. Telecom tower (-17%) REITs also hurt. Other detractors were the integrated telecommunication services (-25%) and the real estate development (-3%) segments.</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>Turning to individual stocks, the biggest contributor was Welltower (+44%), from the health care industry. From the same category, Ventas gained about 43% and lifted the fund as well. In industrials, Prologis rose 40% and also boosted the fund. Simon Property (+47%), from the retail group, helped as well. Lastly, among data center REITs, Equinix (+33%) also contributed.</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 biggest detractor was CoStar (-70%), from the real estate services industry. Within the same segment, Zillow (-57%) also hurt. Among telecom tower REITs, American Tower (-14%) and Crown Castle (-24%) detracted. Lastly, in the other specialized category, VICI Properties returned -14% and further hindered the fund.</span></div>
<div style="text-align:left;text-align-last:auto;"></div>
How did the Fund perform over the past 10 years?
CUMULATIVE PERFORMANCE
July 31, 2016 through July 31, 2026.
Initial investment of $10,000.
Fidelity® Real Estate Index Fund
$10,000
$9,439
$9,807
$10,870
$9,094
$12,707
$12,172
$10,991
$12,159
$12,462
$14,312
Fidelity Real Estate Linked Index℠
$10,000
$9,434
$9,798
$10,865
$9,094
$12,732
$12,194
$11,017
$12,199
$12,493
$14,361
MSCI US IMI Real Estate 25/25 Index
$10,000
$9,830
$10,281
$11,640
$11,050
$15,115
$14,476
$13,079
$14,482
$14,831
$17,049
S&P 500® Index
$10,000
$11,604
$13,489
$14,566
$16,308
$22,251
$21,219
$23,980
$29,292
$34,076
$40,742
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® Real Estate Index Fund</span>
10000
9439
9807
10870
9094
12707
12172
10991
12159
12462
14312
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Real Estate Linked Index℠</span>
10000
9434
9798
10865
9094
12732
12194
11017
12199
12493
14361
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI US IMI Real Estate 25/25 Index</span>
10000
9830
10281
11640
11050
15115
14476
13079
14482
14831
17049
<span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>
10000
11604
13489
14566
16308
22251
21219
23980
29292
34076
40742
AVERAGE ANNUAL TOTAL RETURNS:
1 Year
5 Year
10 Year
Fidelity® Real Estate Index Fund
14.84%
2.41%
3.65%
Fidelity Real Estate Linked Index℠
14.95%
2.44%
3.69%
MSCI US IMI Real Estate 25/25 Index A
14.95%
2.44%
n/a
S&P 500® Index
19.56%
12.86%
15.08%
A FromSeptember 1, 2016
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.
0.1484
0.0241
0.0365
0.1495
0.0244
0.0369
0.1495
0.0244
0.1956
0.1286
0.1508
2016-09-01
<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 July 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>3,249,125,377</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;">147</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>2,078,206</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;">5<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>
3249125377
147
2078206
0.05
TOP INDUSTRIES
(% of Fund's net assets)
Specialized REITs
31.2
Health Care REITs
16.9
Retail REITs
15.1
Industrial REITs
11.3
Residential REITs
10.7
Real Estate Management & Development
6.6
Hotel & Resort REITs
2.9
Office REITs
2.9
Diversified REITs
2.0
Common Stocks
99.6
Short-Term Investments and Net Other Assets (Liabilities)
0.4
ASSET ALLOCATION (% of Fund's net assets)
Common Stocks - 99.6
Short-Term Investments and Net Other Assets (Liabilities) - 0.4
United States
100.0
GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)
United States - 100.0
0.312
0.169
0.151
0.113
0.107
0.066
0.029
0.029
0.020
0.996
0.004
1.000
TOP HOLDINGS(% of Fund's net assets)
Welltower Inc
9.2
Prologis Inc
8.0
Equinix Inc
5.3
Simon Property Group Inc
4.7
American Tower Corp
4.1
Digital Realty Trust Inc
3.9
Realty Income Corp
3.6
Public Storage
3.4
CBRE Group Inc Class A
2.8
Ventas Inc
2.7
47.7
0.092
0.080
0.053
0.047
0.041
0.039
0.036
0.034
0.028
0.027