Fidelity Salem Street Trust

05/21/2026 | Press release | Distributed by Public on 05/21/2026 08:45

Annual Report by Investment Company (Form N-CSR)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED

MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number 811-02105

Fidelity Salem Street Trust

(Exact name of registrant as specified in charter)

245 Summer St., Boston, Massachusetts 02210

(Address of principal executive offices) (Zip code)

Nicole Macarchuk, Secretary

245 Summer St.

Boston, Massachusetts 02210

(Name and address of agent for service)

Registrant's telephone number, including area code:

617-563-7000

Date of fiscal year end:

March 31

Date of reporting period:

March 31, 2026

Item 1.

Reports to Stockholders

ANNUAL SHAREHOLDER REPORT | AS OF MARCH 31, 2026
Fidelity® SAI Municipal Money Market Fund
Fidelity® SAI Municipal Money Market Fund : FMQXX
This annual shareholder report contains information about Fidelity® SAI Municipal Money Market Fund for the period April 1, 2025 to March 31, 2026. 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 [email protected].
What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
FUND COST (PREVIOUS YEAR)
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Fidelity® SAI Municipal Money Market Fund
$ 7
0.07%
Key Fund Statistics
(as of March 31, 2026)
KEY FACTS
Fund Size
$44,823,330
Number of Holdings
1
Total Advisory Fee
$61,941
What did the Fund invest in?
(as of March 31, 2026)
EFFECTIVE MATURITY DIVERSIFICATION
(% of Fund's net assets)
Days
1-7
99.9
ASSET ALLOCATION (% of Fund's net assets)
Net Other Assets (Liabilities) - 100.0
Fidelity, the Fidelity Investments Logo and all other Fidelity trademarks or service marks used herein are trademarks or service marks of FMR LLC. Any third-party marks that are used herein are trademarks or service marks of their respective owners. © 2026 FMR LLC. All rights reserved.
For additional information about the Fund; including its prospectus, financial information, holdings and proxy information, scan the QR code or visit fundresearch.fidelity.com/prospectus/sec
1.9912973.101 3062-TSRA-0526

Item 2.

Code of Ethics

As of the end of the period, March 31, 2026, Fidelity Salem Street Trust (the trust) has adopted a code of ethics, as defined in Item 2 of Form N-CSR, that applies to its President and Treasurer and its Chief Financial Officer. A copy of the code of ethics is filed as an exhibit to this Form N-CSR.

Item 3.

Audit Committee Financial Expert

The Board of Trustees of the trust has determined that Laura M. Bishop is an audit committee financial expert, as defined in Item 3 of Form N-CSR. Ms. Bishop is independent for purposes of Item 3 of Form N-CSR.

Item 4.

Principal Accountant Fees and Services

Fees and Services

The following table presents fees billed by PricewaterhouseCoopers LLP (“PwC”) in each of the last two fiscal years for services rendered to Fidelity SAI Municipal Money Market Fund (the “Fund”):

Services Billed by PwC

March 31, 2026 FeesA

Audit Fees

Audit-Related Fees

Tax Fees

All Other Fees

Fidelity SAI Municipal Money Market Fund

$34,900

$700

$2,200

$200

March 31, 2025 FeesA

Audit Fees

Audit-Related Fees

Tax Fees

All Other Fees

Fidelity SAI Municipal Money Market Fund

$35,000

$2,700

$2,200

$1,200

A Amounts may reflect rounding.

The following table(s) present(s) fees billed by PwC that were required to be approved by the Audit Committee for services that relate directly to the operations and financial reporting of the Fund(s) and that are rendered on behalf of Fidelity Management & Research Company LLC ("FMR") and entities controlling, controlled by, or under common control with FMR (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser) that provide ongoing services to the Fund(s) (“Fund Service Providers”):

Services Billed by PwC

March 31, 2026A

March 31, 2025A

Audit-Related Fees

$9,428,700

$9,765,100

Tax Fees

$1,000

$1,000

All Other Fees

$-

$35,000

A Amounts may reflect rounding.

“Audit-Related Fees” represent fees billed for assurance and related services that are reasonably related to the performance of the fund audit or the review of the fund's financial statements and that are not reported under Audit Fees.

“Tax Fees” represent fees billed for tax compliance, tax advice or tax planning that relate directly to the operations and financial reporting of the fund.

“All Other Fees” represent fees billed for services provided to the fund or Fund Service Provider, a significant portion of which are assurance related, that relate directly to the operations and financial reporting of the fund, excluding those services that are reported under Audit Fees, Audit-Related Fees or Tax Fees.

Assurance services must be performed by an independent public accountant.

* * *

The aggregate non-audit fees billed by PwC for services rendered to the Fund(s), FMR (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any Fund Service Provider for each of the last two fiscal years of the Fund(s) are as follows:

Billed By

March 31, 2026A

March 31, 2025A

PwC

$14,644,200

$14,803,700

A Amounts may reflect rounding.

The trust's Audit Committee has considered non-audit services that were not pre-approved that were provided by PwC to Fund Service Providers to be compatible with maintaining the independence of PwC in its(their) audit of the Fund(s), taking into account representations from PwC, in accordance with Public Company Accounting Oversight Board rules, regarding its independence from the Fund(s) and its(their) related entities and FMR’s review of the appropriateness and permissibility under applicable law of such non-audit services prior to their provision to the Fund(s) Service Providers.

Audit Committee Pre-Approval Policies and Procedures

The trust’s Audit Committee must pre-approve all audit and non-audit services provided by a fund’s independent registered public accounting firm relating to the operations or financial reporting of the fund. Prior to the commencement of any audit or non-audit services to a fund, the Audit Committee reviews the services to determine whether they are appropriate and permissible under applicable law.

The Audit Committee has adopted policies and procedures to, among other purposes, provide a framework for the Committee’s consideration of non-audit services by the audit firms that audit the Fidelity funds. The policies and procedures require that any non-audit service provided by a fund audit firm to a Fidelity fund and any non-audit service provided by a fund auditor to a Fund Service Provider that relates directly to the operations and financial reporting of a Fidelity fund (“Covered Service”) are subject to approval by the Audit Committee before such service is provided.

All Covered Services must be approved in advance of provision of the service either: (i) by formal resolution of the Audit Committee, or (ii) by oral or written approval of the service by the Chair of the Audit Committee (or if the Chair is unavailable, such other member of the Audit Committee as may be designated by the Chair to act in the Chair’s absence). The approval contemplated by (ii) above is permitted where the Treasurer determines that action on such an engagement is necessary before the next meeting of the Audit Committee.

Non-audit services provided by a fund audit firm to a Fund Service Provider that do not relate directly to the operations and financial reporting of a Fidelity fund are reported to the Audit Committee periodically.

Non-Audit Services Approved Pursuant to Rule 2-01(c)(7)(i)(C) and (ii) of Regulation S-X (“De Minimis Exception”)

There were no non-audit services approved or required to be approved by the Audit Committee pursuant to the De Minimis Exception during the Fund’s(s’) last two fiscal years relating to services provided to (i) the Fund(s) or (ii) any Fund Service Provider that relate directly to the operations and financial reporting of the Fund(s).

The Registrant has not retained, for the preparation of the audit report on the financial statements included in the Form N-CSR, a registered public accounting firm that has a branch or office that is located in a foreign jurisdiction and that the Public Company Accounting Oversight Board (the “PCAOB”) has determined that the PCAOB is unable to inspect or investigate completely because of a position taken by an authority in the foreign jurisdiction.

The Registrant is not a “foreign issuer,” as defined in 17 CFR 240.3b-4.

Item 5.

Audit Committee of Listed Registrants

Not applicable.

Item 6.

Investments

(a)

Not applicable.

(b)

Not applicable.

Item 7.

Financial Statements and Financial Highlights for Open-End Management Investment Companies

Fidelity® SAI Municipal Money Market Fund
Annual Report
March 31, 2026
Offered exclusively to certain clients of the Adviser, or its affiliates, including Strategic Advisers LLC (Strategic Advisers) - not available for sale to the general public. Fidelity® SAI is a product name of Fidelity® funds dedicated to certain programs affiliated with Strategic Advisers.

Contents

Item 7: Financial Statements and Financial Highlights for Open-End Management Investment Companies (Annual Report)

Fidelity® SAI Municipal Money Market Fund

Notes to Financial Statements

Report of Independent Registered Public Accounting Firm

Distributions

Item 8: Changes in and Disagreements with Accountants for Open-End Management Investment Companies

Item 9: Proxy Disclosures for Open-End Management Investment Companies

Item 10: Remuneration Paid to Directors, Officers, and others of Open-End Management Investment Companies

Item 11: Statement Regarding Basis for Approval of Investment Advisory Contract

To view a fund's proxy voting guidelines and proxy voting record for the 12-month period ended June 30, visit http://www.fidelity.com/proxyvotingresults or visit the Securities and Exchange Commission's (SEC) web site at http://www.sec.gov.
You may also call 1-800-544-3455 to request a free copy of the proxy voting guidelines.
Standard & Poor's, S&P and S&P 500 are registered service marks of The McGraw-Hill Companies, Inc. and have been licensed for use by Fidelity Distributors Corporation.
Other third-party marks appearing herein are the property of their respective owners.
All other marks appearing herein are registered or unregistered trademarks or service marks of FMR LLC or an affiliated company. © 2026 FMR LLC. All rights reserved.
This report and the financial statements contained herein are submitted for the general information of the shareholders of the Fund. This report is not authorized for distribution to prospective investors in the Fund unless preceded or accompanied by an effective prospectus.
A fund files its complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-PORT. Forms N-PORT are available on the SEC's web site at http://www.sec.gov. A fund's Forms N-PORT may be reviewed and copied at the SEC's Public Reference Room in Washington, DC. Information regarding the operation of the SEC's Public Reference Room may be obtained by calling 1-800-SEC-0330.
For a complete list of a fund's portfolio holdings, view the most recent holdings listing, semiannual report, or annual report on Fidelity's web site at http://www.fidelity.com, http://www.institutional.fidelity.com, or http://www.401k.com, as applicable.
NOT FDIC INSURED •MAY LOSE VALUE •NO BANK GUARANTEE
Neither the Fund nor Fidelity Distributors Corporation is a bank.
Item 7: Financial Statements and Financial Highlights for Open-End Management Investment Companies (Annual Report)
Fidelity® SAI Municipal Money Market Fund
Schedule of Investments March 31, 2026
Showing Percentage of Net Assets
Money Market Funds - 99.9%
Yield (%)
Shares
Value ($)
Fidelity Municipal Cash Central Fund (a)(b)
(Cost $44,762,521)
2.60
44,753,215
44,762,521
TOTAL INVESTMENT IN SECURITIES - 99.9%
(Cost $44,762,521)
44,762,521
NET OTHER ASSETS (LIABILITIES) - 0.1%
60,809
NET ASSETS - 100.0%
44,823,330
The date shown for securities represents the date when principal payments must be paid, taking into account any call options exercised by the issuer and any permissible maturity shortening features other than interest rate resets.
Legend
(a)
Information in this report regarding holdings by state and security types does not reflect the holdings of the Fidelity Central Fund.
(b)
Affiliated fund that is generally available only to investment companies and other accounts managed by Fidelity Investments. The rate quoted is the annualized seven-day yield of the fund at period end. A complete unaudited listing of the fund's holdings as of its most recent quarter end is available upon request. In addition, each Fidelity Central Fund's financial statements, which are not covered by the Fund's Report of Independent Registered Public Accounting Firm, are available on the SEC's website or upon request.
Affiliated Central Funds
Fiscal year to date information regarding the Fund's investments in Fidelity Central Funds, including the ownership percentage, is presented below.
Affiliate
Value,
beginning
of period ($)
Purchases ($)
Sales
Proceeds ($)
Dividend
Income ($)
Realized
Gain (loss) ($)
Change in
Unrealized
appreciation
(depreciation) ($)
Value,
end
of period ($)
Shares,
end
of period
% ownership,
end
of period
Fidelity Municipal Cash Central Fund
43,618,106
1,144,415
-
1,147,889
-
-
44,762,521
44,753,215
1.2%
Total
43,618,106
1,144,415
-
1,147,889
-
-
44,762,521
Amounts in the dividend income column in the above table include any capital gain distributions from underlying funds, which are presented in the corresponding line item in the Statement of Operations, if applicable.
Amounts included in the purchases and sales proceeds columns may include in-kind transactions, if applicable.
Investment Valuation
The following is a summary of the inputs used, as of March 31, 2026, involving the Fund's assets and liabilities carried at fair value. The inputs or methodology used for valuing securities may not be an indication of the risk associated with investing in those securities. For more information on valuation inputs, and their aggregation into the levels used below, please refer to the Investment Valuation section in the accompanying Notes to Financial Statements.
Valuation Inputs at Reporting Date:
Description
Total ($)
Level 1 ($)
Level 2 ($)
Level 3 ($)
Investments in Securities:
Money Market Funds
44,762,521
44,762,521
-
-
Total Investments in Securities:
44,762,521
44,762,521
-
-
Financial Statements
Statement of Assets and Liabilities
As of March 31, 2026
Assets
Investment in securities, at value - See accompanying schedule:
Fidelity Central Funds (cost $44,762,521)
$
44,762,521
Total Investment in Securities (cost $44,762,521)
$
44,762,521
Cash
9,480
Distributions receivable from Fidelity Central Funds
87,318
Prepaid expenses
16
Receivable from investment adviser for expense reductions
7,038
Other receivables
8
Total assets
44,866,381
Liabilities
Accrued management fee
$
5,237
Audit fee payable
37,795
Other payables and accrued expenses
19
Total liabilities
43,051
Net Assets
$
44,823,330
Net Assets consist of:
Paid in capital
$
44,849,673
Total accumulated earnings (loss)
(26,343)
Net Assets
$
44,823,330
Net Asset Value, offering price and redemption price per share ($44,823,330 ÷ 44,814,381 shares)
$
1.0002
Statement of Operations
Year ended March 31, 2026
Investment Income
Interest
$
37
Income from Fidelity Central Funds
1,147,445
Total income
1,147,482
Expenses
Management fee
$
61,941
Custodian fees and expenses
57
Independent trustees' fees and expenses
103
Registration fees
25,136
Audit fees
41,339
Legal
17
Miscellaneous
102
Total expenses before reductions
128,695
Expense reductions
(97,635)
Total expenses after reductions
31,060
Net Investment income (loss)
1,116,422
Realized and Unrealized Gain (Loss)
Capital gain distributions from Fidelity Central Funds
444
Total net realized gain (loss)
444
Net increase in net assets resulting from operations
$
1,116,866
Statement of Changes in Net Assets
Year ended
March 31, 2026
Year ended
March 31, 2025
Increase (Decrease) in Net Assets
Operations
Net investment income (loss)
$
1,116,422
$
1,323,456
Net realized gain (loss)
444
(1,570)
Change in net unrealized appreciation (depreciation)
-
(632)
Net increase in net assets resulting from operations
1,116,866
1,321,254
Distributions to shareholders
(1,116,302)
(1,323,808)
Share transactions
Reinvestment of distributions
1,116,302
1,323,468
Cost of shares redeemed
-
(1,968,128)
Net increase (decrease) in net assets and shares resulting from share transactions
1,116,302
(644,660)
Total increase (decrease) in net assets
1,116,866
(647,214)
Net Assets
Beginning of period
43,706,464
44,353,678
End of period
$
44,823,330
$
43,706,464
Other Information
Shares
Issued in reinvestment of distributions
1,116,078
1,323,204
Redeemed
-
(1,967,734)
Net increase (decrease)
1,116,078
(644,530)
Financial Highlights
Fidelity® SAI Municipal Money Market Fund
Years ended March 31,
2026
2025
2024
2023
2022
Selected Per-Share Data
Net asset value, beginning of period
$
1.0002
$
1.0002
$
1.0004
$
1.0000
$
1.0004
Income from Investment Operations
Net investment income (loss) A
.0252
.0308
.0346
.0180
.0003
Net realized and unrealized gain (loss)
- B
- B
(.0002)
.0004
(.0003)
Total from investment operations
.0252
.0308
.0344
.0184
-
Distributions from net investment income
(.0252)
(.0308)
(.0346)
(.0180)
(.0003)
Distributions from net realized gain
-
-
-
-
(.0001)
Total distributions
(.0252)
(.0308)
(.0346)
(.0180)
(.0004)
Net asset value, end of period
$
1.0002
$
1.0002
$
1.0002
$
1.0004
$
1.0000
Total Return C
2.55
%
3.14%
3.47%
1.85%
-%
Ratios to Average Net Assets A,D,E
Expenses before reductions
.29%
.29%
.20%
.16%
.16%
Expenses net of fee waivers, if any
.07
%
.07%
.14%
.14%
.09%
Expenses net of all reductions, if any
.07%
.07%
.14%
.14%
.09%
Net investment income (loss)
2.52%
3.07%
3.43%
1.57%
.03%
Supplemental Data
Net assets, end of period (000 omitted)
$
44,823
$
43,706
$
44,354
$
160,484
$
537,411
ANet investment income (loss) is affected by the timing of the declaration of dividends by any underlying mutual funds or exchange-traded funds (ETFs). Net investment income (loss) of any mutual funds or ETFs is not included in the Fund's net investment income (loss) ratio.
BAmount represents less than $.00005 per share.
CTotal returns would have been lower if certain expenses had not been reduced during the applicable periods shown.
DFees and expenses of any underlying mutual funds or exchange-traded funds (ETFs) are not included in the Fund's expense ratio. The Fund indirectly bears its proportionate share of these expenses. For additional expense information related to investments in Fidelity Central Funds, please refer to the "Investments in Fidelity Central Funds" note found in the Notes to Financial Statements section of the most recent Annual or Semi-Annual report.
EExpense ratios reflect operating expenses of the class. Expenses before reductions do not reflect amounts reimbursed, waived, or reduced through arrangements with the investment adviser, brokerage services, or other offset arrangements, if applicable, and do not represent the amount paid by the class during periods when reimbursements, waivers or reductions occur.
Notes to Financial Statements
For the period ended March 31, 2026
1. Organization.
Fidelity SAI Municipal Money Market Fund (the Fund) is a fund of Fidelity Salem Street Trust (the Trust) and is authorized to issue an unlimited number of shares. Shares are offered exclusively to certain clients of Fidelity Management & Research Company LLC (FMR) or its affiliates. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Massachusetts business trust. The Fund has been designated an institutional money market fund, and the value of the Fund's shares are calculated to four decimal places that fluctuates based upon changes in the value of the Fund's investments.
2. Investments in Fidelity Central Funds.
Funds may invest in Fidelity Central Funds, which are open-end investment companies generally available only to other investment companies and accounts managed by the investment adviser and its affiliates. The Schedule of Investments lists any Fidelity Central Funds held as an investment as of period end, but does not include the underlying holdings of each Fidelity Central Fund. An investing fund indirectly bears its proportionate share of the expenses of the underlying Fidelity Central Funds.
Based on its investment objective, each Fidelity Central Fund may invest or participate in various investment vehicles or strategies that are similar to those of the investing fund. These strategies are consistent with the investment objectives of the investing fund and may involve certain economic risks which may cause a decline in value of each of the Fidelity Central Funds and thus a decline in the value of the investing fund.
Fidelity Central Fund
Investment Manager
Investment Objective
Investment Practices
Expense RatioA
Fidelity Money Market Central Funds
Fidelity Management & Research Company LLC (FMR)
Each fund seeks to obtain a high level of current income consistent with the preservation of capital and liquidity.
Short-term Investments
Less than .005%
A Expenses expressed as a percentage of average net assets and are as of each underlying Central Fund's most recent annual or semi-annual shareholder report.
A complete unaudited list of holdings for each Fidelity Central Fund is available upon request or at the Securities and Exchange Commission website at www.sec.gov. In addition, the financial statements of the Fidelity Central Funds which contain the significant accounting policies (including investment valuation policies) of those funds, and are not covered by the Report of Independent Registered Public Accounting Firm, are available on the Securities and Exchange Commission website or upon request.
3. Significant Accounting Policies.
The Fund is an investment company and applies the accounting and reporting guidance of the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies. The financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (GAAP), which require management to make certain estimates and assumptions at the date of the financial statements. Actual results could differ from those estimates. The Fund operates as a single operating segment. The Fund's income, expenses, assets, and performance are regularly monitored and assessed as a whole by the investment adviser and other individuals responsible for oversight functions of the Trust, using the information presented in the financial statements and financial highlights. Subsequent events, if any, through the date that the financial statements were issued have been evaluated in the preparation of the financial statements. The Fund's Schedule of Investments lists any underlying mutual funds or exchange-traded funds but does not include the underlying holdings of these funds. The following summarizes the significant accounting policies of the Fund:
Investment Valuation. Investments are valued as of 4:00 p.m. Eastern time on the last calendar day of the period. The Board of Trustees (the Board) has designated the Fund's investment adviser as the valuation designee responsible for the fair valuation function and performing fair value determinations as needed. The investment adviser has established a Fair Value Committee (the Committee) to carry out the day-to-day fair valuation responsibilities and has adopted policies and procedures to govern the fair valuation process and the activities of the Committee. In accordance with these fair valuation policies and procedures, which have been approved by the Board, the Fund attempts to obtain prices from one or more third party pricing services or brokers to value its investments. When current market prices, quotations or currency exchange rates are not readily available or reliable, investments will be fair valued in good faith by the Committee, in accordance with the policies and procedures. Factors used in determining fair value vary by investment type and may include market or investment specific events, transaction data, estimated cash flows, and market observations of comparable investments. The frequency that the fair valuation procedures are used cannot be predicted and they may be utilized to a significant extent. The Committee manages the Fund's fair valuation practices and maintains the fair valuation policies and procedures. The Fund's investment adviser reports to the Board information regarding the fair valuation process and related material matters.
The Fund categorizes the inputs to valuation techniques used to value its investments into a disclosure hierarchy consisting of three levels as shown below:
Level 1 - unadjusted quoted prices in active markets for identical investments
Level 2 - other significant observable inputs (including quoted prices for similar investments, interest rates, prepayment speeds, etc.)
Level 3 - unobservable inputs (including the Fund's own assumptions based on the best information available)
Valuation techniques used to value the Fund's investments by major category are as follows:
Investments in open-end mutual funds, including the Fidelity Central Funds, are valued at their closing net asset value (NAV) each business day and are categorized as Level 1 in the hierarchy.
The aggregate value of investments by input level as of March 31, 2026 is included at the end of the Fund's Schedule of Investments.
Investment Transactions and Income. The net asset value per share for processing shareholder transactions is calculated as of the close of business of the New York Stock Exchange (NYSE), normally 4:00 p.m. Eastern time. Security transactions, including the Fund's investment activity in the Fidelity Central Funds, are accounted for as of trade date. Gains and losses on securities sold are determined on the basis of identified cost. Income and capital gain distributions from Fidelity Central Funds, if any, are recorded on the ex-dividend date. Interest income is accrued as earned and includes coupon interest and amortization of premium and accretion of discount on debt securities as applicable.
Expenses. Expenses directly attributable to a fund are charged to that fund. Expenses attributable to more than one fund are allocated among the respective funds on the basis of relative net assets or other appropriate methods. Expenses included in the accompanying financial statements reflect the expenses of that fund and do not include any expenses associated with any underlying mutual funds or exchange-traded funds. Although not included in a fund's expenses, a fund indirectly bears its proportionate share of these expenses through the net asset value of each underlying mutual fund or exchange-traded fund. Expense estimates are accrued in the period to which they relate and adjustments are made when actual amounts are known.
Income Tax Information and Distributions to Shareholders. Each year, the Fund intends to qualify as a regulated investment company under Subchapter M of the Internal Revenue Code, including distributing substantially all of its taxable income and realized gains. As a result, no provision for U.S. Federal income taxes is required. As of March 31, 2026, the Fund did not have any unrecognized tax benefits in the financial statements; nor is the Fund aware of any tax positions for which it is reasonably possible that the total amounts of unrecognized tax benefits will significantly change in the next twelve months. The Fund files a U.S. federal tax return, in addition to state and local tax returns as required. The Fund's federal income tax returns are subject to examination by the Internal Revenue Service (IRS) for a period of three fiscal years after they are filed. State and local tax returns may be subject to examination for an additional fiscal year depending on the jurisdiction.
Distributions are declared and recorded daily and paid monthly from net investment income. Distributions from realized gains, if any, are declared and recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP.
Capital accounts within the financial statements are adjusted for permanent book-tax differences. These adjustments have no impact on net assets or the results of operations. Capital accounts are not adjusted for temporary book-tax differences which will reverse in a subsequent period.
Book-tax differences are primarily due to capital loss carryforwards.
The Fund purchases municipal securities whose interest, in the opinion of the issuer, is free from federal income tax. There is no assurance that the IRS will agree with this opinion. In the event the IRS determines that the issuer does not comply with relevant tax requirements, interest payments from a security could become federally taxable, possibly retroactively to the date the security was issued.
As of period end, the cost and unrealized appreciation (depreciation) in securities for federal income tax purposes were as follows:
Gross unrealized appreciation
$-
Gross unrealized depreciation
-
Net unrealized appreciation (depreciation)
$-
Tax Cost
$44,762,521
The tax-based components of distributable earnings as of period end were as follows:
Undistributed tax-exempt income
$165
Capital loss carryforward
$(26,508)
Net unrealized appreciation (depreciation) on securities and other investments
$-
Capital loss carryforwards are only available to offset future capital gains of the Fund to the extent provided by regulations and may be limited. The capital loss carryforward information presented below, including any applicable limitation, is estimated as of fiscal period end and is subject to adjustment.
Short-term
$(26,508)
Total capital loss carryforward
$(26,508)
The tax character of distributions paid was as follows:
March 31, 2026
March 31, 2025
Tax-exempt Income
1,116,302
1,323,808
Total
$1,116,302
$1,323,808
4. Fees and Other Transactions with Affiliates.
Management Fee. Fidelity Management & Research Company LLC (the investment adviser) and its affiliates provide the Fund with investment management related services for which the Fund pays a monthly management fee that is based on an annual rate of .14% of the Fund's average net assets.
Interfund Trades. Funds may purchase from or sell securities to other Fidelity Funds under procedures adopted by the Board of Trustees. The procedures have been designed to ensure these interfund trades are executed in accordance with Rule 17a-7 of the 1940 Act. During the period, there were no interfund trades.
5. Expense Reductions.
The investment adviser contractually agreed to reimburse the Fund to the extent annual operating expenses exceeded .07% of average net assets. This reimbursement will remain in place through July 31, 2027. Some expenses, for example the compensation of the independent Trustees, and certain miscellaneous expenses such as proxy and shareholder meeting expenses, are excluded from this reimbursement. During the period this reimbursement reduced the Fund's expenses by $97,615.
Through arrangements with the Fund's custodian, credits realized as a result of certain uninvested cash balances were used to reduce the Fund's expenses by $20.
6. Other.
A fund's organizational documents provide former and current trustees and officers with a limited indemnification against liabilities arising in connection with the performance of their duties to the fund. In the normal course of business, a fund may also enter into contracts that provide general indemnifications. A fund's maximum exposure under these arrangements is unknown as this would be dependent on future claims that may be made against a fund. The risk of material loss from such claims is considered remote.
In addition, at the end of the period, the following mutual funds managed by the investment adviser or its affiliates were the owners of record of 10% or more of the total outstanding shares.
Strategic Advisers Tax-Sensitive Short Duration Fund
Fidelity SAI Municipal Money Market Fund
99%
Mutual funds managed by the investment adviser or its affiliates, in aggregate, were the owners of record of more than 20% of the total outstanding shares.
Fund
% of shares held
Fidelity SAI Municipal Money Market Fund
100%
7. Risk and Uncertainties.
Many factors affect a fund's performance. Developments that disrupt global economies and financial markets, such as public health emergencies, military conflicts, terrorism, government restrictions, political changes, and environmental disasters, may significantly affect a fund's investment performance. The effects of these developments to a fund will be impacted by the types of securities in which a fund invests, the financial condition, industry, economic sector, and geographic location of an issuer, and a fund's level of investment in the securities of that issuer. Significant concentrations in security types, issuers, industries, sectors, and geographic locations may magnify the factors that affect a fund's performance.
Report of Independent Registered Public Accounting Firm
To the Board of Trustees of Fidelity Salem Street Trust and Shareholders of Fidelity SAI Municipal Money Market Fund
Opinion on the Financial Statements
We have audited the accompanying statement of assets and liabilities, including the schedule of investments, of Fidelity SAI Municipal Money Market Fund (one of the funds constituting Fidelity Salem Street Trust, referred to hereafter as the "Fund") as of March 31, 2026, the related statement of operations for the year ended March 31, 2026, the statement of changes in net assets for each of the two years in the period ended March 31, 2026, including the related notes, and the financial highlights for each of the five years in the period ended March 31, 2026 (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund as of March 31, 2026, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period ended March 31, 2026 and the financial highlights for each of the five years in the period ended March 31, 2026 in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Fund's management. Our responsibility is to express an opinion on the Fund's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Fund in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits of these financial statements in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our procedures included confirmation of securities owned as of March 31, 2026 by correspondence with the custodian. We believe that our audits provide a reasonable basis for our opinion.
/s/ PricewaterhouseCoopers LLP
Boston, Massachusetts
May 12, 2026
We have served as the auditor of one or more investment companies in the Fidelity group of funds since 1932.
Distributions
(Unaudited)
The dividend and capital gains distributions for the fund(s) are available on Fidelity.com or Institutional.Fidelity.com.
During fiscal year ended 2026, 100% of the fund's income dividends was free from federal income tax, and 41.50% of the fund's income dividends was subject to the federal alternative minimum tax.
The fund will notify shareholders in the first quarter of 2027 of amounts for use in preparing 2026 income tax returns.
Item 8: Changes in and Disagreements with Accountants for Open-End Management Investment Companies
(Unaudited)
Note: This is not applicable for any fund included in this document.
Item 9: Proxy Disclosures for Open-End Management Investment Companies
(Unaudited)
Note: This is not applicable for any fund included in this document.
Item 10: Remuneration Paid to Directors, Officers, and others of Open-End Management Investment Companies
(Unaudited)
Note: This information is disclosed as part of the financial statements for each Fund as part of Item 7: Financial Statements and Financial Highlights for Open-End Management Investment Companies.
Item 11: Statement Regarding Basis for Approval of Investment Advisory Contract
(Unaudited)
Note: This is not applicable for any fund included in this document.
1.9885508.108
OMM-ANN-0526

Item 8.

Changes in and Disagreements with Accountants for Open-End Management Investment Companies

See Item 7.

Item 9.

Proxy Disclosures for Open-End Management Investment Companies

See Item 7.

Item 10.

Remuneration Paid to Directors, Officers, and Others of Open-End Management Investment Companies

See Item 7.

Item 11.

Statement Regarding Basis for Approval of Investment Advisory Contract

See Item 7.

Item 12.

Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies

Not applicable.

Item 13.

Portfolio Managers of Closed-End Management Investment Companies

Not applicable.

Item 14.

Purchase of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers

Not applicable.

Item 15.

Submission of Matters to a Vote of Security Holders

There were no material changes to the procedures by which shareholders may recommend nominees to the trust’s Board of Trustees.

Item 16.

Controls and Procedures

(a)(i) The President and Treasurer and the Chief Financial Officer have concluded that the trust’s disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act) provide reasonable assurances that material information relating to the trust is made known to them by the appropriate persons, based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of this report.

(a)(ii) There was no change in the trust’s internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act) that occurred during the period covered by this report that has materially affected, or is reasonably likely to materially affect, the trust’s internal control over financial reporting.

Item 17.

Disclosure of Securities Lending Activities for Closed-End Management Investment Companies

Not applicable.

Item 18.

Recovery of Erroneously Awarded Compensation

(a)

Not applicable.

(b)

Not applicable.

Item 19.

Exhibits

(a)

(1)

.

(a)

(2)

.

(a)

(3)

Not applicable.

(b)

.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Fidelity Salem Street Trust

By:

/s/Laura M. Del Prato

Laura M. Del Prato

President and Treasurer (Principal Executive Officer)

Date:

May 21, 2026

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By:

/s/Laura M. Del Prato

Laura M. Del Prato

President and Treasurer (Principal Executive Officer)

Date:

May 21, 2026

By:

/s/Stephanie Caron

Stephanie Caron

Chief Financial Officer (Principal Financial Officer)

Date:

May 21, 2026

Fidelity Salem Street Trust published this content on May 21, 2026, and is solely responsible for the information contained herein. Distributed via EDGAR on May 21, 2026 at 14:46 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]