# EDGAR Filing Document

**Accession Number:** 0000225322
**File Stem:** 0000225322-25-000144
**Filing Date:** 2025-6
**Character Count:** 2010
**Document Hash:** 706a412e84553671c1148aa94ca1bf56
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000225322-25-000144.hdr.sgml**: 20250613

**ACCESSION NUMBER**: 0000225322-25-000144

**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:** 251044910

**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 Sector Fund (Series ID: S000075898)

| Class ID   | Class Name                           | Ticker Symbol   |
|:---|:---|:---|
| C000235239 | Fidelity SAI Sustainable Sector Fund | FIDJX           |

**Supplement to the Fidelity® SAI Sustainable Sector Fund July 30, 2024 Summary Prospectus**

*Zach Dewhirst no longer serves as Portfolio Manager of the fund.*

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

Kenyon Hunt (Co-Portfolio Manager) has managed the fund since 2025.

Anthony Italiano (Co-Portfolio Manager) has managed the fund since 2025.

Michael Robertson (Co-Portfolio Manager) has managed the fund since 2025.

Stacie Wang (Co-Portfolio Manager) has managed the fund since 2025.

SES-SUSTK-0625-101 1.9911708.101 June 13, 2025