# EDGAR Filing Document

**Accession Number:** 0000225322
**File Stem:** 0000225322-25-000145
**Filing Date:** 2025-6
**Character Count:** 2525
**Document Hash:** aff0785e37333c66f34f745a26fd3ba6
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000225322-25-000145.hdr.sgml**: 20250613

**ACCESSION NUMBER**: 0000225322-25-000145

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20250613

**DATE AS OF CHANGE**: 20250613

**EFFECTIVENESS DATE**: 20250613

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** FIDELITY SUMMER STREET TRUST
- **CENTRAL INDEX KEY:** 0000225322

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

**FILING VALUES:**
- **FORM TYPE:** 497K
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-58542
- **FILM NUMBER:** 251044911

**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 HIGH INCOME FUND
- **DATE OF NAME CHANGE:** 19890309

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FIDELITY AGGRESSIVE INCOME FUND
- **DATE OF NAME CHANGE:** 19810205

## Series and Classes Contracts Data

### Fidelity SAI Sustainable U.S. Equity Fund (Series ID: S000075899)

| Class ID   | Class Name                                | Ticker Symbol   |
|:---|:---|:---|
| C000235240 | Fidelity SAI Sustainable U.S. Equity Fund | FIDEX           |

**Supplement to the Fidelity® SAI Sustainable U.S. Equity Fund July 30, 2024 Summary Prospectus**

*Effective June 13, 2025, Nidhi Gupta no longer serves as Lead Portfolio Manager of the fund.*

*Effective June 13, 2025, Michael Robertson no longer serves as Co-Portfolio Manager of the fund.*

The following information supplements information found in the "Fund Summary" section under the "Portfolio Manager(s)" heading.

Preeti Sayana (Portfolio Manager) has managed the fund since 2025.

The following information replaces similar information found in the "Fund Summary" section under the "Portfolio Manager(s)" heading.

Nicole Connolly (Co-Lead Portfolio Manager) has managed the fund since 2022.

It is expected that Ms. Connolly will retire on or about December 31, 2024. At that time, she will no longer serve as Co-Lead Portfolio Manager of the fund, and Ms. Gupta will assume sole Lead portfolio manager responsibilities.

Nidhi Gupta (Co-Lead Portfolio Manager) has managed the fund since 2024.

Michael Robertson (Co-Portfolio Manager) has managed the fund since 2022.

EFS-SUSTK-0625-102 1.9911709.102 June 13, 2025