Supplement to the
Fidelity® SAI Small-Mid Cap Momentum Index Fund
September 29, 2026
STATEMENT OF ADDITIONAL INFORMATION
 
 
The following information replaces similar information found in the "Securities Lending" section.
Security Lending Activities
  
Fund(s)
 
  
Fidelity® SAI Small-Mid Cap Momentum Index Fund
Gross income from securities lending activities
$
1,229,975
Fees paid to securities lending agent from a revenue split
$
0
Administrative fees
$
0
Rebate (paid to borrower)
$
1,104,674
Other fees not included in the revenue split (lending agent fees to NFS)
$
8,718
Aggregate fees/compensation for securities lending activities
$
1,113,392
Net income from securities lending activities
$
116,583
 
  
  
 
SV3-SSTK-1026-104-1.9881344.104
October 23, 2026
 
Supplement to the
Fidelity® Real Estate Index Fund
September 29, 2026
STATEMENT OF ADDITIONAL INFORMATION
 
 
The following information replaces similar information found in the "Securities Lending" section.
Security Lending Activities
  
Fund(s)
 
  
Fidelity® Real Estate Index Fund
Gross income from securities lending activities
$
956,645
Fees paid to securities lending agent from a revenue split
$
0
Administrative fees
$
0
Rebate (paid to borrower)
$
811,937
Other fees not included in the revenue split (lending agent fees to NFS)
$
13,692
Aggregate fees/compensation for securities lending activities
$
825,630
Net income from securities lending activities
$
131,015
 
  
  
 
URX-I-SSTK-1026-112-1.933388.112
October 23, 2026
 
Supplement to the
Fidelity® SAI U.S. Quality Index Fund
September 29, 2026
STATEMENT OF ADDITIONAL INFORMATION
 
 
The following information replaces similar information found in the "Securities Lending" section.
Security Lending Activities
  
Fund(s)
 
  
Fidelity® SAI U.S. Quality Index Fund
Gross income from securities lending activities
$
1,270,413
Fees paid to securities lending agent from a revenue split
$
0
Administrative fees
$
0
Rebate (paid to borrower)
$
1,219,289
Other fees not included in the revenue split (lending agent fees to NFS)
$
5,036
Aggregate fees/compensation for securities lending activities
$
1,224,325
Net income from securities lending activities
$
46,088
 
  
  
 
SV4-SSTK-1026-104-1.9881343.104
October 23, 2026
 
Supplement to the
Fidelity® SAI Real Estate Index Fund
September 29, 2026
STATEMENT OF ADDITIONAL INFORMATION
 
 
The following information replaces similar information found in the "Securities Lending" section.
Security Lending Activities
  
Fund(s)
 
  
Fidelity® SAI Real Estate Index Fund
Gross income from securities lending activities
$
61,897
Fees paid to securities lending agent from a revenue split
$
0
Administrative fees
$
0
Rebate (paid to borrower)
$
52,983
Other fees not included in the revenue split (lending agent fees to NFS)
$
807
Aggregate fees/compensation for securities lending activities
$
53,790
Net income from securities lending activities
$
8,107
 
  
  
 
SV8-SSTK-1026-106-1.9871335.106
October 23, 2026
 
Supplement to the
Fidelity® SAI U.S. Large Cap Index Fund
September 29, 2026
STATEMENT OF ADDITIONAL INFORMATION
 
 
The following information replaces similar information found in the "Securities Lending" section.
Security Lending Activities
  
Fund(s)
 
  
Fidelity® SAI U.S. Large Cap Index Fund
Gross income from securities lending activities
$
703,788
Fees paid to securities lending agent from a revenue split
$
0
Administrative fees
$
0
Rebate (paid to borrower)
$
393,143
Other fees not included in the revenue split (lending agent fees to NFS)
$
7,465
Aggregate fees/compensation for securities lending activities
$
400,608
Net income from securities lending activities
$
303,180
 
  
  
 
SV9-SSTK-1026-107-1.9871338.107
October 23, 2026
 
Supplement to the
Fidelity® SAI U.S. Momentum Index Fund
September 29, 2026
STATEMENT OF ADDITIONAL INFORMATION
 
 
The following information replaces similar information found in the "Securities Lending" section.
Security Lending Activities
  
Fund(s)
 
  
Fidelity® SAI U.S. Momentum Index Fund
Gross income from securities lending activities
$
542,027
Fees paid to securities lending agent from a revenue split
$
0
Administrative fees
$
0
Rebate (paid to borrower)
$
525,014
Other fees not included in the revenue split (lending agent fees to NFS)
$
1,650
Aggregate fees/compensation for securities lending activities
$
526,664
Net income from securities lending activities
$
15,363
 
  
  
 
SY1-SSTK-1026-103-1.9895979.103
October 23, 2026
 
Supplement to the
Fidelity® SAI U.S. Value Index Fund
September 29, 2026
STATEMENT OF ADDITIONAL INFORMATION
 
 
The following information replaces similar information found in the "Securities Lending" section.
Security Lending Activities
  
Fund(s)
 
  
Fidelity® SAI U.S. Value Index Fund
Gross income from securities lending activities
$
1,961,070
Fees paid to securities lending agent from a revenue split
$
0
Administrative fees
$
0
Rebate (paid to borrower)
$
1,119,999
Other fees not included in the revenue split (lending agent fees to NFS)
$
21,555
Aggregate fees/compensation for securities lending activities
$
1,141,553
Net income from securities lending activities
$
819,517
 
  
  
 
USV-SSTK-1026-103-1.9895973.103
October 23, 2026