# EDGAR Filing Document

**Accession Number:** 0000106444
**File Stem:** 0000106444-26-000231
**Filing Date:** 2026-6
**Character Count:** 3217
**Document Hash:** b0d13043f1f116f485a34fde864041e5
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000106444-26-000231.hdr.sgml**: 20260605

**ACCESSION NUMBER**: 0000106444-26-000231

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260605

**DATE AS OF CHANGE**: 20260605

**EFFECTIVENESS DATE**: 20260605

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** VANGUARD FIXED INCOME SECURITIES FUNDS
- **CENTRAL INDEX KEY:** 0000106444

**ORGANIZATION NAME:**
- **EIN:** 231899003
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0131

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-47371
- **FILM NUMBER:** 261067025

**BUSINESS ADDRESS:**
- **STREET 1:** PO BOX 2600
- **STREET 2:** V26
- **CITY:** VALLEY FORGE
- **STATE:** PA
- **ZIP:** 19482
- **BUSINESS PHONE:** 6106691000

**MAIL ADDRESS:**
- **STREET 1:** PO BOX 2600
- **STREET 2:** V26
- **CITY:** VALLEY FORGE
- **STATE:** PA
- **ZIP:** 19482

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** VANGUARD FIXED INCOME SECURITIES FUND INC
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** WESTMINSTER BOND FUND INC
- **DATE OF NAME CHANGE:** 19800619

## Series and Classes Contracts Data

### Vanguard Short-Term Federal Fund (Series ID: S000002590)

---

|  |  |  |
|:---|:---|:---|
| Class Name      | Ticker Symbol | Class ID   |
| Investor Shares | VSGBX         | C000007105 |
| Admiral Shares  | VSGDX         | C000007106 |

---

## Series and Classes Contracts Data

### Vanguard Short-Term Federal Fund (Series ID: S000002590)

| Class ID   | Class Name      | Ticker Symbol   |
|:---|:---|:---|
| C000007105 | Investor Shares | VSGBX           |
| C000007106 | Admiral Shares  | VSGDX           |

![](g86sfvr7o92k1mzqobpkx.jpg)

Vanguard Short-Term Federal Fund

**Supplement Dated June 5, 2026, to the Prospectus and Summary Prospectus Dated May 28, 2026**

**Important Change to Vanguard Short-Term Federal Fund**

**Fund Name Change**

The board of trustees of Vanguard Fixed Income Securities Funds has approved the renaming of Vanguard Short-Term Federal Fund (the "Fund") to Vanguard Short-Term Government Securities Active Fund. The Fund's name change will be effective on or about September 3, 2026.

The Fund's investment objective, strategies, and polices will remain unchanged.© 2026 The Vanguard Group, Inc. All rights reserved. PS 028C 062026 <br> Vanguard Marketing Corporation, Distributor.

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![](vanguard.jpg)

**Vanguard Fixed Income Securities Funds**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

**Supplement Dated June 5, 2026, to the Statement of Additional Information Dated May 28, 2026**

**Important Change to Vanguard Short-Term Federal Fund**

**Fund Name Change**

The board of trustees of Vanguard Fixed Income Securities Funds has approved the renaming of Vanguard Short-Term Federal Fund (the "Fund") to Vanguard Short-Term Government Securities Active Fund. The Fund's name change will be effective on or about September 3, 2026.

The Fund's investment objective, strategies, and polices will remain unchanged.© 2026 The Vanguard Group, Inc. All rights reserved.

Vanguard Marketing Corporation, Distributor.

**SAI 028C 062026**

------