# EDGAR Filing Document

**Accession Number:** 0000035315
**File Stem:** 0000035315-25-001190
**Filing Date:** 2025-12
**Character Count:** 3666
**Document Hash:** 33c579f8169b6c0cd8c1334c177a0a74
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000035315-25-001190.hdr.sgml**: 20251212

**ACCESSION NUMBER**: 0000035315-25-001190

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251212

**DATE AS OF CHANGE**: 20251212

**EFFECTIVENESS DATE**: 20251212

**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:** 251566770

**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 Sustainable Core Plus Bond Fund (Series ID: S000075892)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                                | Ticker Symbol | Class ID   |
| Fidelity Advisor Sustainable Core Plus Bond Fund: Class C | FIAJX         | C000235218 |
| Fidelity Advisor Sustainable Core Plus Bond Fund: Class A | FIAIX         | C000235219 |
| Fidelity Advisor Sustainable Core Plus Bond Fund: Class Z | FIAMX         | C000235220 |
| Fidelity Advisor Sustainable Core Plus Bond Fund: Class I | FIALX         | C000235221 |
| Fidelity Advisor Sustainable Core Plus Bond Fund: Class M | FIAKX         | C000235222 |

---

## Series and Classes Contracts Data

### Fidelity Sustainable Core Plus Bond Fund (Series ID: S000075892)

| Class ID   | Class Name                                                | Ticker Symbol   |
|:---|:---|:---|
| C000235218 | Fidelity Advisor Sustainable Core Plus Bond Fund: Class C | FIAJX           |
| C000235219 | Fidelity Advisor Sustainable Core Plus Bond Fund: Class A | FIAIX           |
| C000235220 | Fidelity Advisor Sustainable Core Plus Bond Fund: Class Z | FIAMX           |
| C000235221 | Fidelity Advisor Sustainable Core Plus Bond Fund: Class I | FIALX           |
| C000235222 | Fidelity Advisor Sustainable Core Plus Bond Fund: Class M | FIAKX           |

**Supplement to the<br>Fidelity® Sustainable Core Plus Bond Fund<br>Class A, Class M, Class C, Class I, and Class Z<br>October 30, 2025<br>Prospectus**

*It is expected that Mr. O'Neil will transition off the fund effective on or about September 30, 2026. Julian Potenza will become a Co-Portfolio Manager for the fund effective April 1, 2026.*

Effective April 1, 2026, the following information supplements information found in the "Fund Summary" section under the "Portfolio Manager(s)" heading.

Julian Potenza (Co-Portfolio Manager) has managed the fund since 2026.

Effective April 1, 2026, the following information supplements the biographical information found in the "Fund Management" section under the "Portfolio Manager(s)" heading.

Julian Potenza is Co-Portfolio Manager of Fidelity® Sustainable Core Plus Bond Fund, which he has managed since 2026. He also manages other funds. Since joining Fidelity Investments in 2007, Mr. Potenza has worked as a research analyst and portfolio manager.

ASCB-PSTK-1225-102 1.9912288.102 December 12, 2025