# EDGAR Filing Document

**Accession Number:** 0000035315
**File Stem:** 0000035315-26-000292
**Filing Date:** 2026-5
**Character Count:** 11416
**Document Hash:** 915e2d731b6a8b7840f1f94f947e9719
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000035315-26-000292.hdr.sgml**: 20260528

**ACCESSION NUMBER**: 0000035315-26-000292

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 27

**FILED AS OF DATE**: 20260528

**DATE AS OF CHANGE**: 20260528

**EFFECTIVENESS DATE**: 20260528

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** FIDELITY SALEM STREET TRUST
- **CENTRAL INDEX KEY:** 0000035315

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0430

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-41839
- **FILM NUMBER:** 261029235

**BUSINESS ADDRESS:**
- **STREET 1:** 245 SUMMER STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02210
- **BUSINESS PHONE:** 617-563-7000

**MAIL ADDRESS:**
- **STREET 1:** 245 SUMMER STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02210

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FIDELITY FIXED INCOME TRUST
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FIDELITY FLEXIBLE BOND FUND
- **DATE OF NAME CHANGE:** 19860904

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FIDELITY CORPORATE BOND FUND INC
- **DATE OF NAME CHANGE:** 19851225

## Series and Classes Contracts Data

### Fidelity Emerging Markets Index Fund (Series ID: S000033635)

---

|  |  |  |
|:---|:---|:---|
| Class Name                           | Ticker Symbol | Class ID   |
| Fidelity Emerging Markets Index Fund | FPADX         | C000103361 |

---

### Fidelity SAI Emerging Markets Index Fund (Series ID: S000051995)

---

|  |  |  |
|:---|:---|:---|
| Class Name                               | Ticker Symbol | Class ID   |
| Fidelity SAI Emerging Markets Index Fund | FERGX         | C000163541 |

---

### Fidelity U.S. Sustainability Index Fund (Series ID: S000057366)

---

|  |  |  |
|:---|:---|:---|
| Class Name                              | Ticker Symbol | Class ID   |
| Fidelity U.S. Sustainability Index Fund | FITLX         | C000183136 |

---

## Series and Classes Contracts Data

### Fidelity Emerging Markets Index Fund (Series ID: S000033635)

| Class ID   | Class Name                           | Ticker Symbol   |
|:---|:---|:---|
| C000103361 | Fidelity Emerging Markets Index Fund | FPADX           |

### Fidelity SAI Emerging Markets Index Fund (Series ID: S000051995)

| Class ID   | Class Name                               | Ticker Symbol   |
|:---|:---|:---|
| C000163541 | Fidelity SAI Emerging Markets Index Fund | FERGX           |

### Fidelity U.S. Sustainability Index Fund (Series ID: S000057366)

| Class ID   | Class Name                              | Ticker Symbol   |
|:---|:---|:---|
| C000183136 | Fidelity U.S. Sustainability Index Fund | FITLX           |

?xml version='1.0' encoding='ASCII'? Prospectus - Investment Objective

**Supplement to the Fidelity® SAI Emerging Markets Index Fund December 30, 2025 Prospectus** 

The following information supplements information found in the "Fund Summary" section under the "Principal Investment Strategies" heading.

The fund may operate as a non-diversified fund, as defined under the Investment Company Act of 1940 (1940 Act), to the approximate extent the index is non-diversified. The fund may therefore operate as non-diversified solely as a result of a change in relative market capitalization or index weighting of one or more constituents of the index.

The following information supplements information found in the "Fund Summary" section under the "Principal Investment Risks" heading.

*In addition, the fund may operate as a non-diversified fund under the 1940 Act to the approximate extent the index is non-diversified. A non-diversified fund may invest a greater portion of its assets in securities of a smaller number of individual issuers than a diversified fund. As a result, changes in the market value of a single investment could cause greater fluctuations in share price than would occur in a more diversified fund.*

The following information replaces similar information found in the "Investment Details" section under the "Principal Investment Strategies" heading.

Geode may use statistical sampling techniques to attempt to replicate the returns of the index. Statistical sampling techniques attempt to match the investment characteristics of the index and the fund by taking into account such factors as capitalization, industry exposures, dividend yield, P/E ratio, P/B ratio, and earnings growth. Although the fund may not necessarily hold all of the same securities as the index, the fund generally invests in those constituents it does hold in approximately the same proportion as their index weightings.

The fund may operate as a non-diversified fund, as defined under the 1940 Act, to the approximate extent the index is non-diversified. The fund may therefore operate as non-diversified solely as a result of a change in relative market capitalization or index weighting of one or more constituents of the index. As a result, Geode may invest a significant percentage of the fund's assets in a single issuer or small number of issuers.

The following information supplements information found in the "Investment Details" section under the "Principal Investment Risks" heading.

In addition, because the fund may invest a significant percentage of assets in a single issuer, the fund's performance could be closely tied to that one issuer and could be more volatile than the performance of more diversified funds.

SV6-PSTK-0526-106 1.9871331.106 May 28, 2026

**Supplement to the Fidelity® Emerging Markets Index Fund and Fidelity® Global ex U.S. Index Fund December 30, 2025 Prospectus** 

The following information supplements information for Fidelity® Emerging Markets Index Fund found in the "Fund Summary" section under the "Principal Investment Strategies" heading.

The fund may operate as a non-diversified fund, as defined under the Investment Company Act of 1940 (1940 Act), to the approximate extent the index is non-diversified. The fund may therefore operate as non-diversified solely as a result of a change in relative market capitalization or index weighting of one or more constituents of the index.

The following information supplements information for Fidelity® Emerging Markets Index Fund found in the "Fund Summary" section under the "Principal Investment Risks" heading.

*In addition, the fund may operate as a non-diversified fund under the 1940 Act to the approximate extent the index is non-diversified. A non-diversified fund may invest a greater portion of its assets in securities of a smaller number of individual issuers than a diversified fund. As a result, changes in the market value of a single investment could cause greater fluctuations in share price than would occur in a more diversified fund.*

The following information replaces similar information for Fidelity® Emerging Markets Index Fund found in the "Investment Details" section under the "Principal Investment Strategies" heading.

Geode may use statistical sampling techniques to attempt to replicate the returns of the index. Statistical sampling techniques attempt to match the investment characteristics of the index and the fund by taking into account such factors as capitalization, industry exposures, dividend yield, P/E ratio, P/B ratio, and earnings growth. Although the fund may not necessarily hold all of the same securities as the index, the fund generally invests in those constituents it does hold in approximately the same proportion as their index weightings.

The fund may operate as a non-diversified fund, as defined under the 1940 Act, to the approximate extent the index is non-diversified. The fund may therefore operate as non-diversified solely as a result of a change in relative market capitalization or index weighting of one or more constituents of the index. As a result, Geode may invest a significant percentage of the fund's assets in a single issuer or small number of issuers.

The following information supplements information found in the "Investment Details" section under the "Principal Investment Risks" heading.

In addition, because Fidelity® Emerging Markets Index Fund may invest a significant percentage of assets in a single issuer, the fund's performance could be closely tied to that one issuer and could be more volatile than the performance of more diversified funds.

EMX-I-GUX-I-PSTK-0526-121 1.933380.121 May 28, 2026

**Supplement to the Fidelity® International Sustainability Index Fund and Fidelity® U.S. Sustainability Index Fund December 30, 2025 Prospectus** 

The following information supplements information for Fidelity® U.S. Sustainability Index Fund found in the "Fund Summary" section under the "Principal Investment Strategies" heading.

The fund may operate as a non-diversified fund, as defined under the Investment Company Act of 1940 (1940 Act), to the approximate extent the index is non-diversified. The fund may therefore operate as non-diversified solely as a result of a change in relative market capitalization or index weighting of one or more constituents of the index.

The following information supplements information for Fidelity® U.S. Sustainability Index Fund found in the "Fund Summary" section under the "Principal Investment Risks" heading.

*In addition, the fund may operate as a non-diversified fund under the 1940 Act to the approximate extent the index is non-diversified. A non-diversified fund may invest a greater portion of its assets in securities of a smaller number of individual issuers than a diversified fund. As a result, changes in the market value of a single investment could cause greater fluctuations in share price than would occur in a more diversified fund.*

The following information replaces similar information for Fidelity® U.S. Sustainability Index Fund found in the "Investment Details" section under the "Principal Investment Strategies" heading.

Geode may use statistical sampling techniques to attempt to replicate the returns of the index. Statistical sampling techniques attempt to match the investment characteristics of the index and the fund by taking into account such factors as capitalization, industry exposures, dividend yield, P/E ratio, P/B ratio, and earnings growth. Although the fund may not necessarily hold all of the same securities as the index, the fund generally invests in those constituents it does hold in approximately the same proportion as their index weightings.

The fund may operate as a non-diversified fund, as defined under the 1940 Act, to the approximate extent the index is non-diversified. The fund may therefore operate as non-diversified solely as a result of a change in relative market capitalization or index weighting of one or more constituents of the index. As a result, Geode may invest a significant percentage of the fund's assets in a single issuer or small number of issuers.

The following information supplements information found in the "Investment Details" section under the "Principal Investment Risks" heading.

In addition, because Fidelity® U.S. Sustainability Index Fund may invest a significant percentage of assets in a single issuer, the fund's performance could be closely tied to that one issuer and could be more volatile than the performance of more diversified funds.

USY-I-ISY-I-PSTK-0526-104 1.9884199.104 May 28, 2026