# EDGAR Filing Document

**Accession Number:** 0001131013
**File Stem:** 0001193125-25-325028
**Filing Date:** 2025-12
**Character Count:** 8287
**Document Hash:** 50fad0269a928f0bc6780f1512a4f890
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-325028.hdr.sgml**: 20251218

**ACCESSION NUMBER**: 0001193125-25-325028

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251218

**DATE AS OF CHANGE**: 20251218

**EFFECTIVENESS DATE**: 20251218

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** GuideStone Funds
- **CENTRAL INDEX KEY:** 0001131013

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

**FILING VALUES:**
- **FORM TYPE:** 497K
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-53432
- **FILM NUMBER:** 251583844

**BUSINESS ADDRESS:**
- **STREET 1:** 5005 LYNDON B. JOHNSON FREEWAY
- **STREET 2:** SUITE 2200
- **CITY:** DALLAS
- **STATE:** TX
- **ZIP:** 75244-6152
- **BUSINESS PHONE:** 214-720-2148

**MAIL ADDRESS:**
- **STREET 1:** 5005 LYNDON B. JOHNSON FREEWAY
- **STREET 2:** SUITE 2200
- **CITY:** DALLAS
- **STATE:** TX
- **ZIP:** 75244-6152

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AB FUNDS TRUST/DE
- **DATE OF NAME CHANGE:** 20010405

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ANNUITY BOARD FUNDS TRUST
- **DATE OF NAME CHANGE:** 20010102

## Series and Classes Contracts Data

### LOW-DURATION BOND FUND (Series ID: S000001154)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000003079 | Institutional | GLDYX           |
| C000003080 | Investor      | GLDZX           |

**GUIDESTONE FUNDS** <br>

Supplement dated December 18, 2025

to

Prospectus and Summary Prospectus each dated May 1, 2025, <br>for the Low-Duration Bond Fund and *Defensive Market Strategies*<sup>®</sup> Fund

**This supplement provides new information beyond that contained in the Prospectus and Summary Prospectus. It should be retained and read in conjunction with the Prospectus and Summary Prospectus.**

**I. SUB-ADVISER CHANGE FOR THE LOW-DURATION BOND FUND**

Effective on January 1, 2026, Brown Brothers Harriman Credit Partners, LLC ("BBHCP") will become a sub-adviser to the Low-Duration Bond Fund ("LDBF"). Brown Brothers Harriman & Co. ("BBH") recently created a new U.S. subsidiary in BBHCP. This SEC-registered investment adviser houses the fixed income team and strategies formerly of BBH, of which the LDBF is a client. Upon effectiveness, BBHCP will become the sub-adviser to an assigned portion of the LDBF that was previously allocated to BBH, and all references to BBH will be deleted in their entirety and replaced with BBHCP.

<u>In the section "Sub-Advisers and Portfolio Managers" for the LDBF, beginning on page 79, the disclosure</u> <u>for BBH is deleted in its entirety and replaced with the following:</u>

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

---

| | |
|:---|:---|
| **Brown Brothers Harriman Credit Partners, LLC**  | **Brown Brothers Harriman Credit Partners, LLC**  |
| &nbsp;&nbsp; Andrew Hofer<br> Portfolio Co-Manager<br>| Since March 2025 |
| &nbsp;&nbsp; Neil Hohmann<br> Portfolio Co-Manager<br>| Since March 2025 |
| &nbsp;&nbsp; Paul Kunz, CFA<br> Portfolio Co-Manager<br>| Since March 2025 |

---

<u>Under the heading "Sub-Advisers" for the LDBF, on page 216, the disclosure for BBH is deleted in its</u> <u>entirety and replaced with the following:</u>

*Brown Brothers Harriman Credit Partners, LLC ("BBHCP"), 140 Broadway, New York, New York 10005:* BBHCP, is a Delaware limited liability company, founded in 2025. It is a majority owned subsidiary of, and controlled by, Brown Brothers Harriman & Co. ("BBH") which was founded in 1818. BBHCP is a registered investment adviser and serves as an investment adviser or sub-adviser to mutual funds that are registered under the 1940 Act, private funds, institutional separately managed accounts, collective investment trusts and collective investment funds organized under the Undertakings for Collective Investments in Transferable Securities. BBHCP commenced operations and became a sub-adviser on January 1, 2026. As of September 30, 2025, BBHCP's parent, BBH, had assets under management of approximately $96.7 billion. The portfolio managers who are jointly and primarily responsible for the day-to-day management of an assigned portion of the Low-Duration Bond Fund are Andrew Hofer, Portfolio Co-Manager, Neil Hohmann, Partner of BBH and Portfolio Co-Manager and Paul Kunz, CFA, Portfolio Co-Manager. Messrs. Hofer, Hohmann and Kunz each began serving as portfolio managers of BBHCP upon the commencement of operations, and previously had more than five years of investment management experience with BBH.

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**II. PORTFOLIO MANAGER UPDATES FOR THE *DEFENSIVE MARKET STRATEGIES***<sup>®</sup> **FUND**

Effective November 3, 2025, Tim Hutfilz, Senior Vice President and Portfolio Manager of Shenkman Capital Management, Inc. ("Shenkman"), began serving as a portfolio manager to the firm's assigned portion of the *Defensive Market Strategies*<sup>®</sup> Fund ("DMSF").

In addition, effective December 1, 2025, Thomas Whitley, Senior Vice President and Portfolio Manager of Shenkman, no longer serves as a portfolio manager to the firm's assigned portion of the DMSF. Upon effectiveness, all references to Mr. Whitley are deleted in their entirety.

<u>In the section "Sub-Advisers and Portfolio Managers" for the DMSF, on page 110, the disclosure for</u> <u>Shenkman is deleted in its entirety and replaced with the following:</u>

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

---

| | |
|:---|:---|
| **Shenkman Capital Management, Inc.**  | **Shenkman Capital Management, Inc.**  |
| &nbsp;&nbsp; Jordan Barrow<br> Senior Vice President,<br> Co-Head of Liquid Credit and<br> Portfolio Manager<br>| Since July 2015 |
| &nbsp;&nbsp; Jeffrey Gallo<br> Senior Vice President,<br> Co-Head of Liquid Credit and<br> Portfolio Manager<br>| Since July 2022 |
| &nbsp;&nbsp; Tim Hutfilz<br> Senior Vice President,<br> Portfolio Manager<br>| Since November 2025 |
| &nbsp;&nbsp; Mark R. Shenkman<br> President<br>| Since September 2011 |
| &nbsp;&nbsp; Justin W. Slatky<br> Executive Vice President and <br> Chief Investment Officer<br>| Since October 2016 |

---

<u>Under the heading "Sub-Advisers" for the DMSF, beginning on page 220, the disclosure for Shenkman is</u> <u>deleted in its entirety and replaced with the following:</u>

*Shenkman Capital Management, Inc. ("Shenkman"), 151 West 42*<sup>nd</sup> *Street, 29th Floor, New York, New York 10036:* Shenkman is an independently owned, registered investment adviser founded in July 1985 by Mark R. Shenkman, President. Since its inception, Shenkman's business has been focused on researching and investing across the entire capital structure of highly leveraged companies through in-depth, bottom-up, fundamental credit analysis. As of September 30, 2025, the firm had assets under management of approximately $38.0 billion, which includes $3.6 billion managed by an affiliate. Shenkman employs a team approach to portfolio management. Justin W. Slatky, Executive Vice President and Chief Investment Officer, is responsible for setting strategies and direction with respect to the firm's investment-related activities. Mr. Shenkman has ultimate responsibility with respect to the firm's operations, including its strategic direction, client relationships and investment program. The primary day-to-day oversight responsibilities of the portion of the Defensive Market Strategies Fund assigned to Shenkman are conducted by Messrs. Shenkman and Slatky. The primary day-to-day management of the portion of the Defensive Market Strategies Fund assigned to Shenkman is conducted by Jordan Barrow, Senior Vice President, Co-Head of Liquid Credit and Portfolio Manager, Jeffrey Gallo, Senior Vice President, Co-Head of Liquid Credit and Portfolio Manager, and Tim Hutfilz, Senior Vice President and Portfolio Manager. Messrs. Slatky, Barrow and Gallo have all been with the firm for more than five years. Mr. Hutfilz has been with the firm since November 2025, and prior to joining Shenkman, Mr. Hutfilz served 20 years as a Partner and Managing Director at TPG Angelo Gordon.

**PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE**

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