# EDGAR Filing Document

**Accession Number:** 0001131013
**File Stem:** 0001193125-26-276966
**Filing Date:** 2026-6
**Character Count:** 12305
**Document Hash:** 1d3575ef5bcb3bd70792ca9c765dab18
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-276966.hdr.sgml**: 20260622

**ACCESSION NUMBER**: 0001193125-26-276966

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260622

**DATE AS OF CHANGE**: 20260622

**EFFECTIVENESS DATE**: 20260622

**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:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-53432
- **FILM NUMBER:** 261105471

**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

### MEDIUM-DURATION BOND FUND (Series ID: S000001155)

---

|  |  |  |
|:---|:---|:---|
| Class Name    | Ticker Symbol | Class ID   |
| Institutional | GMDYX         | C000003083 |
| Investor      | GMDZX         | C000003084 |

---

### Global Bond Fund (Series ID: S000014481)

---

|  |  |  |
|:---|:---|:---|
| Class Name    | Ticker Symbol | Class ID   |
| Investor      | GGBFX         | C000039452 |
| Institutional | GGBEX         | C000158246 |

---

## Series and Classes Contracts Data

### MEDIUM-DURATION BOND FUND (Series ID: S000001155)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000003083 | Institutional | GMDYX           |
| C000003084 | Investor      | GMDZX           |

### Global Bond Fund (Series ID: S000014481)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000039452 | Investor      | GGBFX           |
| C000158246 | Institutional | GGBEX           |

**GUIDESTONE FUNDS** <br>

Supplement dated June 22, 2026

to

Prospectus and Summary Prospectus each dated May 1, 2026, <br>for the Medium-Duration Bond Fund and Global Bond 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.**

**1. PORTFOLIO MANAGER UPDATES FOR THE MEDIUM-DURATION BOND FUND AND** <br>**GLOBAL BOND FUND**

Effective June 30, 2026, Scott A. Darci, Portfolio Manager, CFA, and Bryan C. Hazelton, Portfolio Manager, CFA, of Loomis, Sayles & Company, L.P. (Loomis Sayles) will begin serving as portfolio managers to the firm's assigned portion of each of the Medium-Duration Bond Fund (MDBF) and Global Bond Fund (GBF).

<u>In the section "Sub-Advisers and Portfolio Managers" for the MDBF and GBF, on pages 90 and 96,</u> <u>respectively, the disclosures for Loomis Sayles are deleted in their entirety and replaced with the following:</u>

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

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| | |
|:---|:---|
| **Loomis, Sayles & Company, L.P.**  | **Loomis, Sayles & Company, L.P.**  |
| &nbsp;&nbsp; Scott A. Darci, CFA<br> Portfolio Manager<br>| Since June 2026 |
| &nbsp;&nbsp; Matthew J. Eagan, CFA<br> Portfolio Manager<br>| Since June 2008 |
| &nbsp;&nbsp; Bryan C. Hazelton, CFA<br> Portfolio Manager<br>| Since June 2026 |
| &nbsp;&nbsp; Brian P. Kennedy<br> Portfolio Manager<br>| Since May 2016 |

---

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

*Loomis, Sayles & Company, L.P., (Loomis Sayles), One Financial Center, Boston, Massachusetts 02111*: Established in 1926, Loomis Sayles managed approximately $417.9 billion in fixed income and equity assets for institutional, high net worth and mutual fund clients as of March 31, 2026. Scott A. Darci, CFA, Matthew J. Eagan, CFA, Bryan C. Hazelton, CFA, and Brian P. Kennedy have primary responsibility for the day-to-day management of Loomis Sayles' assigned portion of the Medium-Duration Bond Fund. Mr. Darci, Portfolio Manager, has been with Loomis Sayles since 2008 and has over 20 years of investment industry experience. Mr. Eagan, Portfolio Manager, has been with Loomis Sayles since 1997 and has over 35 years of investment industry experience. Mr. Hazelton, Portfolio Manager, has been with Loomis Sayles since 2011 and has over 19 years of investment industry experience. Mr. Kennedy, Portfolio Manager, has been with Loomis Sayles since 1994 and has over 35 years of investment industry experience.

<u>Under the heading "Sub-Advisers" for the GBF, on page 217, the disclosure for Loomis Sayles is deleted in</u> <u>its entirety and replaced with the following:</u>

*Loomis, Sayles & Company, L.P., (Loomis Sayles), One Financial Center, Boston, Massachusetts 02111*: Established in 1926, Loomis Sayles managed approximately $417.9 billion in fixed income and equity assets for institutional, high net worth and mutual fund clients as of March 31, 2026. Scott A. Darci, CFA, Matthew J. Eagan, CFA, Bryan C. Hazelton, CFA, and Brian P. Kennedy have primary responsibility for the day-to-day management of Loomis Sayles' assigned portion of the Global Bond Fund. Mr. Darci, Portfolio Manager, has been with Loomis Sayles since 2008 and has over 20 years of investment industry experience. Mr. Eagan, Portfolio Manager, has been with Loomis Sayles

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since 1997 and has over 35 years of investment industry experience. Mr. Hazelton, Portfolio Manager, has been with Loomis Sayles since 2011 and has over 19 years of investment industry experience. Mr. Kennedy, Portfolio Manager, has been with Loomis Sayles since 1994 and has over 35 years of investment industry experience.

**PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE**

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**GUIDESTONE FUNDS** <br>

Supplement dated June 22, 2026

to

Statement of Additional Information (SAI) dated May 1, 2026

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

**I. CHANGES TO OTHER ACCOUNTS MANAGED**

Effective June 30, 2026, Scott A. Darci, Portfolio Manager, CFA, and Bryan C. Hazelton, Portfolio Manager, CFA, of Loomis, Sayles & Company, L.P. (Loomis Sayles) will begin serving as portfolio managers to the firm's assigned portion of each of the Medium-Duration Bond Fund and Global Bond Fund.

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<u>The</u> *<u>Other Accounts Managed</u>* <u>table, beginning on page 80, is amended as follows to incorporate portfolio manager updates for Loomis Sayles. The information</u> <u>is current as of December 31, 2025, unless indicated otherwise.</u>

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

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| | | | | | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| ***Sub-Advisers***<br> ***Portfolio Managers*** | Total number of other accounts managed by Portfolio Manager(s) <br> within each category below and the total assets in the accounts <br> managed within each category below. | Total number of other accounts managed by Portfolio Manager(s) <br> within each category below and the total assets in the accounts <br> managed within each category below. | Total number of other accounts managed by Portfolio Manager(s) <br> within each category below and the total assets in the accounts <br> managed within each category below. | Total number of other accounts managed by Portfolio Manager(s) <br> within each category below and the total assets in the accounts <br> managed within each category below. | Total number of other accounts managed by Portfolio Manager(s) <br> within each category below and the total assets in the accounts <br> managed within each category below. | Total number of other accounts managed by Portfolio Manager(s) <br> within each category below and the total assets in the accounts <br> managed within each category below. | For other accounts managed by Portfolio Manager(s) within each <br> category below, number of accounts and the total assets in the <br> accounts with respect to which the advisory fee is based on the <br> performance of the account. | For other accounts managed by Portfolio Manager(s) within each <br> category below, number of accounts and the total assets in the <br> accounts with respect to which the advisory fee is based on the <br> performance of the account. | For other accounts managed by Portfolio Manager(s) within each <br> category below, number of accounts and the total assets in the <br> accounts with respect to which the advisory fee is based on the <br> performance of the account. | For other accounts managed by Portfolio Manager(s) within each <br> category below, number of accounts and the total assets in the <br> accounts with respect to which the advisory fee is based on the <br> performance of the account. | For other accounts managed by Portfolio Manager(s) within each <br> category below, number of accounts and the total assets in the <br> accounts with respect to which the advisory fee is based on the <br> performance of the account. | For other accounts managed by Portfolio Manager(s) within each <br> category below, number of accounts and the total assets in the <br> accounts with respect to which the advisory fee is based on the <br> performance of the account. |
| ***Sub-Advisers***<br> ***Portfolio Managers*** | **Registered Investment**<br> **Companies** | **Registered Investment**<br> **Companies** | **Other Pooled**<br> **Investment Vehicles** | **Other Pooled**<br> **Investment Vehicles** | **Other Accounts** | **Other Accounts** | **Registered Investment**<br> **Companies** | **Registered Investment**<br> **Companies** | **Other Pooled**<br> **Investment Vehicles** | **Other Pooled**<br> **Investment Vehicles** | **Other Accounts** | **Other Accounts** |
| ***Sub-Advisers***<br> ***Portfolio Managers*** | **Number**<br> **of**<br> **Accounts**<br>| **Total**<br> **Assets**<br> **($mm)**<br>| **Number**<br> **of**<br> **Accounts**<br>| **Total**<br> **Assets**<br> **($mm)**<br>| **Number**<br> **of**<br> **Accounts**<br>| **Total**<br> **Assets**<br> **($mm)**<br>| **Number**<br> **of**<br> **Accounts**<br>| **Total**<br> **Assets**<br> **($mm)**<br>| **Number**<br> **of**<br> **Accounts**<br>| **Total**<br> **Assets**<br> **($mm)**<br>| **Number**<br> **of**<br> **Accounts**<br>| **Total**<br> **Assets**<br> **($mm)**<br>|
| *Loomis, Sayles & Company, L.P.* |  |  |  |  |  |  |  |  |  |  |  |  |
| Scott A. Darci, CFA\* | &nbsp;&nbsp; N/A | &nbsp;&nbsp;&nbsp;&nbsp; N/A | &nbsp;&nbsp;&nbsp;&nbsp; 4 | &nbsp;&nbsp; $475084  | &nbsp;&nbsp; N/A | &nbsp;&nbsp;&nbsp;&nbsp; N/A | &nbsp;&nbsp; N/A | &nbsp;&nbsp; N/A | &nbsp;&nbsp; N/A | &nbsp;&nbsp; N/A | &nbsp;&nbsp; N/A | &nbsp;&nbsp; N/A |
| Matthew J. Eagan, CFA | &nbsp;&nbsp; 19 | &nbsp;&nbsp; $39016  | &nbsp;&nbsp; 35 | &nbsp;&nbsp; $13606  | &nbsp;&nbsp; 100 | &nbsp;&nbsp; 31811 | &nbsp;&nbsp; N/A | &nbsp;&nbsp; N/A | &nbsp;&nbsp; N/A | &nbsp;&nbsp; N/A | &nbsp;&nbsp;&nbsp;&nbsp; 3 | &nbsp;&nbsp; $346  |
| Aziz V. Hamzaogullari | &nbsp;&nbsp; 18 | &nbsp;&nbsp; $32586  | &nbsp;&nbsp; 21 | &nbsp;&nbsp; $21263  | &nbsp;&nbsp; 157 | &nbsp;&nbsp; $42936  | &nbsp;&nbsp; N/A | &nbsp;&nbsp; N/A | &nbsp;&nbsp;&nbsp;&nbsp; 3 | &nbsp;&nbsp; $555  | &nbsp;&nbsp;&nbsp;&nbsp; 1 | &nbsp;&nbsp; $375  |
| Bryan C. Hazelton, CFA\* | &nbsp;&nbsp; N/A | &nbsp;&nbsp;&nbsp;&nbsp; N/A | &nbsp;&nbsp; N/A | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; N/A | &nbsp;&nbsp; 16 | &nbsp;&nbsp; $3696  | &nbsp;&nbsp; N/A | &nbsp;&nbsp; N/A | &nbsp;&nbsp; N/A | &nbsp;&nbsp; N/A | &nbsp;&nbsp; N/A | &nbsp;&nbsp; N/A |
| Brian P. Kennedy | &nbsp;&nbsp; 15 | &nbsp;&nbsp; $37921  | &nbsp;&nbsp; 17 | &nbsp;&nbsp; $12707  | &nbsp;&nbsp; 104 | &nbsp;&nbsp; $31797  | &nbsp;&nbsp; N/A | &nbsp;&nbsp; N/A | &nbsp;&nbsp; N/A | &nbsp;&nbsp; N/A | &nbsp;&nbsp;&nbsp;&nbsp; 3 | &nbsp;&nbsp; $346 |

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<sup>\*</sup>As of March 31, 2026.

**PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE**

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