# EDGAR Filing Document

**Accession Number:** 0000106444
**File Stem:** 0000106444-26-000357
**Filing Date:** 2026-6
**Character Count:** 10159
**Document Hash:** 43812387cd109c80d54d943ff81d83a3
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000106444-26-000357.hdr.sgml**: 20260630

**ACCESSION NUMBER**: 0000106444-26-000357

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260630

**DATE AS OF CHANGE**: 20260630

**EFFECTIVENESS DATE**: 20260630

**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:** 261138388

**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
**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** VANGUARD VARIABLE INSURANCE FUNDS
- **CENTRAL INDEX KEY:** 0000857490

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-32216
- **FILM NUMBER:** 261138389

**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 VARIABLE INSURANCE FUND
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** VANGUARD VARIABLE INSURANCE FUND INC
- **DATE OF NAME CHANGE:** 19910505
**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** VANGUARD MALVERN FUNDS
- **CENTRAL INDEX KEY:** 0000836906

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0930

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-23444
- **FILM NUMBER:** 261138390

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

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

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** VANGUARD ASSET ALLOCATION FUND INC
- **DATE OF NAME CHANGE:** 19920703

## Series and Classes Contracts Data

### Vanguard Intermediate-Term Investment-Grade Fund (Series ID: S000002586)

---

|  |  |  |
|:---|:---|:---|
| Class Name      | Ticker Symbol | Class ID   |
| Investor Shares | VFICX         | C000007097 |
| Admiral Shares  | VFIDX         | C000007098 |

---

### Vanguard Long-Term Investment-Grade Fund (Series ID: S000002588)

---

|  |  |  |
|:---|:---|:---|
| Class Name      | Ticker Symbol | Class ID   |
| Investor Shares | VWESX         | C000007101 |
| Admiral Shares  | VWETX         | C000007102 |

---

### Vanguard Short-Term Investment-Grade Fund (Series ID: S000002591)

---

|  |  |  |
|:---|:---|:---|
| Class Name           | Ticker Symbol | Class ID   |
| Investor Shares      | VFSTX         | C000007107 |
| Admiral Shares       | VFSUX         | C000007108 |
| Institutional Shares | VFSIX         | C000007109 |

---

### Vanguard Institutional Intermediate-Term Bond Fund (Series ID: S000049658)

---

|  |  |  |
|:---|:---|:---|
| Class Name                | Ticker Symbol | Class ID   |
| Institutional Plus Shares | VIITX         | C000157008 |

---

### Vanguard Institutional Short-Term Bond Fund (Series ID: S000049659)

---

|  |  |  |
|:---|:---|:---|
| Class Name                | Ticker Symbol | Class ID   |
| Institutional Plus Shares | VISTX         | C000157009 |

---

### Short-Term Investment-Grade Portfolio (Series ID: S000004393)

---

|  |  |
|:---|:---|
| Class Name                            | Class ID   |
| Short-Term Investment-Grade Portfolio | C000012149 |

---

## Series and Classes Contracts Data

### Vanguard Intermediate-Term Investment-Grade Fund (Series ID: S000002586)

| Class ID   | Class Name      | Ticker Symbol   |
|:---|:---|:---|
| C000007097 | Investor Shares | VFICX           |
| C000007098 | Admiral Shares  | VFIDX           |

### Vanguard Long-Term Investment-Grade Fund (Series ID: S000002588)

| Class ID   | Class Name      | Ticker Symbol   |
|:---|:---|:---|
| C000007101 | Investor Shares | VWESX           |
| C000007102 | Admiral Shares  | VWETX           |

### Vanguard Short-Term Investment-Grade Fund (Series ID: S000002591)

| Class ID   | Class Name           | Ticker Symbol   |
|:---|:---|:---|
| C000007107 | Investor Shares      | VFSTX           |
| C000007108 | Admiral Shares       | VFSUX           |
| C000007109 | Institutional Shares | VFSIX           |

### Vanguard Institutional Intermediate-Term Bond Fund (Series ID: S000049658)

| Class ID   | Class Name                | Ticker Symbol   |
|:---|:---|:---|
| C000157008 | Institutional Plus Shares | VIITX           |

### Vanguard Institutional Short-Term Bond Fund (Series ID: S000049659)

| Class ID   | Class Name                | Ticker Symbol   |
|:---|:---|:---|
| C000157009 | Institutional Plus Shares | VISTX           |

### Short-Term Investment-Grade Portfolio (Series ID: S000004393)

| Class ID   | Class Name                            | Ticker Symbol   |
|:---|:---|:---|
| C000012149 | Short-Term Investment-Grade Portfolio |  |

![](vanguard.jpg)

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

Vanguard Funds

**Supplement Dated June 30, 2026, to the Prospectuses and Summary Prospectuses**

Effective today, one or more portfolio managers no longer serve as co-portfolio manager(s) of each Fund listed in the table below (each, an "Impacted Fund, and collectively, the "Impacted Funds").

Accordingly, all references to the removed portfolio manager(s) listed in the table below in the Impacted Funds' Prospectuses and Summary Prospectuses are hereby deleted in their entirety.

The Impacted Funds' investment objectives, strategies, and policies remain unchanged.

**Prospectus and Summary Prospectus Text Changes**

The following table lists each Impacted Fund and the corresponding portfolio manager(s) removed as co-portfolio manager(s):

---

| | |
|:---|:---|
| **Impacted Fund** | &nbsp;&nbsp; **Removed Portfolio** <br> **Manager(s)**<br>|
| Vanguard Institutional Intermediate-Term Bond Fund | &nbsp;&nbsp; Brian Quigley<br> Daniel Shaykevich <br> David Van Ommeren<br>|
| Vanguard Institutional Short-Term Bond Fund | &nbsp;&nbsp; Daniel Shaykevich <br> David Van Ommeren<br>|
| Vanguard Intermediate-Term Investment-Grade Fund | Daniel Shaykevich |
| Vanguard Long-Term Investment-Grade Fund | Daniel Shaykevich |
| Vanguard Short-Term Investment-Grade Fund | Daniel Shaykevich |
| VVIF — Short-Term Investment-Grade Portfolio | Daniel Shaykevich |

---

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

In addition, with respect to Vanguard Institutional Intermediate-Term Bond Fund, the following replaces similar language under the heading "Investment Advisor" in the **More on the Funds** section:

------

Peter Lee, CFA, Portfolio Manager at VCM. He has worked in investment management since 2006, has been with Vanguard since 2012, and has co-managed the Fund since April 2026. Education: B.S., Villanova University; M.B.A., University of Virginia Darden School of Business.

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

---

| | |
|:---|:---|
| *CFA*<sup>®</sup> is a registered trademark owned by CFA Institute. | *CFA*<sup>®</sup> is a registered trademark owned by CFA Institute. |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br>© 2026 The Vanguard Group, Inc. All rights reserved. <br>Vanguard Marketing Corporation, Distributor.  | PS PMJ 062026 |

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![](gunykuws8ihxbsnf7ctze.jpg)

**Vanguard Fixed Income Securities Funds**

**Vanguard Malvern Funds**

**Vanguard Variable Insurance Funds**

**Supplement Dated June 30, 2026, to the Statements of Additional Information**

Effective today, one or more portfolio managers no longer serve as co-portfolio manager(s) of each Fund listed in the table below (each, an "Impacted Fund," and collectively, the "Impacted Funds"). The Impacted Funds' investment objectives, strategies, and policies remain unchanged.

---

| | | |
|:---|:---|:---|
| **Vanguard Registrant** | &nbsp;&nbsp;**Impacted Fund** | **Removed Portfolio Manager(s)** |
| Vanguard Fixed Income Securities Funds | &nbsp;&nbsp;Vanguard Intermediate-Term | Daniel Shaykevich |
|  | &nbsp;&nbsp;Investment-Grade Fund |  |
|  | &nbsp;&nbsp;Vanguard Long-Term Investment-Grade | Daniel Shaykevich |
|  | &nbsp;&nbsp;Fund |  |
|  | &nbsp;&nbsp;Vanguard Short-Term Investment-Grade | Daniel Shaykevich |
|  | &nbsp;&nbsp;Fund |  |
| Vanguard Malvern Funds | &nbsp;&nbsp;Vanguard Institutional Intermediate-Term | Brian Quigley |
|  | &nbsp;&nbsp;Bond Fund | Daniel Shaykevich |
|  |  | David Van Ommeren |
|  | &nbsp;&nbsp;Vanguard Institutional Short-Term Bond Fund | Daniel Shaykevich |
|  |  | David Van Ommeren |
| Vanguard Variable Insurance Funds | &nbsp;&nbsp;Vanguard Variable Insurance Funds – | Daniel Shaykevich |
|  | &nbsp;&nbsp;Short-Term Investment-Grade Portfolio |  |

---

**Statement of Additional Information Text Changes**

All references to the removed portfolio manager(s) listed in the above table in the Impacted Funds' Statements of Additional Information are hereby deleted in their entirety.

---

| | |
|:---|:---|
|© 2026 The Vanguard Group, Inc. All rights reserved. | **SAI PMJ 062026** |
| Vanguard Marketing Corporation, Distributor. | **SAI PMJ 062026** |

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