MVES Movie Studio Inc (PK)

I. CHANGES TO MANAGEMENT OF THE FUNDS

The SAI is hereby amended to delete all references to William T. Patterson as an Independent Trustee of the Board of Trustees of GuideStone Funds.

II. SUB-ADVISER TERMINATION FOR THE INTERNATIONAL EQUITY FUND

McKinley Capital Management, LLC (“McKinley Capital”) has been terminated as a sub-adviser to the International Equity Fund. All references herein to McKinley Capital are deleted in their entirety.

III. SUB-ADVISER CORPORATE REORGANIZATION FOR THE

EXTENDED-DURATION BOND FUND

All references to STW Fixed Income Management LLC, 6185 Carpinteria Avenue, Carpinteria, California 93013 are deleted in their entirety and replaced with Schroder Investment Management North America Inc., 875 Third Avenue, 22 ^nd Floor, New York, New York 10022. There are no other changes to the disclosure.

IV. CHANGES FOR THE REAL ESTATE SECURITIES FUND

In the section entitled “Control Persons of Sub-Advisers” under the sub-heading for the Real Estate Securities Fund, on page 53, the following paragraphs are added:

Deutsche Investments Australia Limited (“DIAL”), Deutsche Bank Place, Level 16, CNR Hunter and Phillip Streets, Sydney, NSW 2000, Australia: DIAL is a wholly-owned subsidiary of Deutsche Australia Limited which is a wholly-owned subsidiary of Deutsche Bank. DIAL performs investment advisory services for its U.S. affiliated clients, which includes RREEF. DIAL is an affiliated company of RREEF.

Deutsche Alternative Asset Management (Global) Limited (“DeAAM Global”), Winchester House, 1 Great Winchester Street, London, EC2N 2DB, United Kingdom: DeAAM Global is an indirect wholly-owned subsidiary of Deutsche Bank. DeAAM Global is part of the global real estate and infrastructure asset management operation known as RREEF. DeAAM Global is an affiliated company of RREEF.

Heitman Real Estate Securities, LLC (“HRES”), 191 North Wacker Drive, Suite 2500, Chicago, IL 60606: HRES is an SEC-registered investment adviser that has been in business since 1989. The firm is 50% owned indirectly by certain of the firm’s senior officers through KE I LLC, and 50% owned indirectly by Old Mutual Plc, a global financial services company listed on the London and Stockholm Stock Exchanges.

i

Heitman International Real Estate Securities HK Limited (“HIRES HK”), 15/F LHT Tower, 31 Queen’s Road, Central, Hong Kong: HIRES HK is an SEC-registered investment adviser that has been in business since 2012. The firm is 50% owned indirectly by certain of the firm’s senior officers through KE I LLC, and 50% owned indirectly by Old Mutual Plc, a global financial services company listed on the London and Stockholm Stock Exchanges. HIRES HK is an affiliated company of HRES.

Heitman International Real Estate Securities GmbH (“HIRES GmbH”), Maximillianstrasse 35A, 80539, Munich, Germany: HRES is an SEC-registered investment adviser that has been in business since 2007. The firm is 50% owned indirectly by certain of the firm’s senior officers through KE I LLC, and 50% owned indirectly by Old Mutual Plc, a global financial services company listed on the London and Stockholm Stock Exchanges. HIRES GmbH is an affiliated company of HRES.

ii

The “Other Accounts Managed” chart, beginning on page 57, is amended to include information for Heitman Real Estate Securities, LLC, Heitman International Real Estate Securities HK Limited and Heitman International Real Estate Securities GmbH. The information for RREEF America L.L.C. is deleted in its entirety and replaced with the information below for RREEF America L.L.C., Deutsche Investments Australia Limited and Deutsche Alternative Asset Management (Global) Limited. This information for Shenkman Capital Management, Inc. has been amended to add David H. Lerner and delete Frank X. Whitley. This information is current as of June 30, 2013.

iii

In the section entitled “Portfolio Manager Compensation”, beginning on page 66, the following disclosure pertaining to Heitman Real Estate Securities, LLC, Heitman International Real Estate Securities HK Limited and Heitman International Real Estate Securities GmbH, which is current as of June 30, 2013, is added:

Heitman Real Estate Securities LLC (“HRES”), Heitman International Real Estate Securities HK Limited (“HIRES HK”) and Heitman International Real Estate Securities GmbH (“HIRES GmbH”) (together, “Heitman”). Heitman’s compensation program is designed to accomplish several objectives, one of which is retention of the firm’s team. Thirty-five senior employees hold a 50% equity interest in the business. Heitman believes that equity ownership provides a carrot for retention of key personnel and, equally important, that the structure creates alignment of interest between Heitman’s partners and the firm’s clients. The total compensation of the firm’s equity owners is tied directly to the performance of the investments under their collective management and the degree to which client objectives have been met. The incentive compensation is based on a combination of factors including company, business unit and individual performance. The portfolio managers associated with the Real Estate Securities Fund are all equity owners in the firm.

In the section entitled “Portfolio Manager Compensation”, the introductory sentence referring to RREEF America L.L.C., beginning on page 78, is deleted in its entirety and replaced with the following sentence. There are no other changes to this disclosure.

RREEF America L.L.C. (“RREEF”), Deutsche Investments Australia Limited (“DIAL”) and Deutsche Alternative Asset Management (Global) Limited (“DeAAM Global”) (together, “RREEF”).

In Appendix B – Description of Proxy Voting Procedures, the introductory sentence referring to RREEF America, L.L.C., is deleted in its entirety and replaced with the following sentence. There are no other changes to this disclosure.

RREEF America L.L.C. (“RREEF”), Deutsche Investments Australia Limited (“DIAL”) and Deutsche Alternative Asset Management (Global) Limited (“DeAAM Global”) (together, “RREEF”).

In Appendix B – Description of Proxy Voting Procedures, the following disclosure is added:

Heitman Real Estate Securities LLC (“HRES”), Heitman International Real Estate Securities HK Limited (“HIRES HK”) and Heitman International Real Estate Securities GmbH(“HIRES GmbH”) (together, “Heitman”). Heitman’s general policy with respect to all clients in which Heitman has authority to vote proxies is that such proxies will always be voted, or not voted, in all cases in the best interest of such clients. Heitman utilizes the services of an independent unaffiliated proxy firm, who is responsible for: notifying Heitman in advance of the shareholder meeting at which such proxies will be voted; providing the appropriate proxies to be voted; providing independent research on corporate governance, proxy and corporate responsibility issues; recommending actions with respect to proxies which are always deemed by the proxy firm to be in the best interests of the shareholders; and maintaining records of proxy statements received and votes cast.

Heitman will consider each corporate proxy statement on a case-by-case basis and may vote a proxy in a manner different from that recommended by the proxy firm when deemed appropriate. There may also be occasions when Heitman determines, contrary to the proxy voting firm voting’s recommendation for a particular proxy, that not voting such proxy may be more in the best interest of clients. The firm will generally vote with the proxy firm recommendations unless a client agreement specifies differently or

iv

Heitman’s Proxy Policies and Procedures Oversight Committee (the “Proxy Committee”) overturns the recommendations.

Heitman has established the Proxy Committee, consisting of a senior portfolio manager, the chief compliance officer, special counsel of Heitman LLC and chief investment officer of HRES. The Proxy Committee is responsible for (i) designing and reviewing from time to time the Proxy Voting Policies and Procedures (the “Policy”); and (ii) reviewing and addressing all instances where a portfolio manager determines to respond to an issue in a proxy in a manner inconsistent with the Policy and/or identifies actual or perceived potential conflicts of interests in the context of voting proxies.

The firm has delegated the voting of proxies to the proxy voting clerk. As a general rule the proxy voting clerk votes all proxies to which Heitman is entitled to vote. When a proxy is received, the proxy voting clerk will send a proxy analysis report to the portfolio manager within Heitman who is responsible for review of the company conducting the proxy. In reviewing the recommendations to determine how to respond to the proxy in the best interest of clients, the Heitman portfolio manager may consider information from various sources, such as another Heitman portfolio manager or research analyst, management of the company conducting the proxy and shareholder groups, as well as the possibility of any actual or perceived potential conflicts of interest between Heitman and its clients with respect to such proxy. The portfolio manager will return his or her recommendation as to how to vote the proxy to the proxy voting clerk along with a description and explanation of any actual or perceived conflicts of interest. In instances where the portfolio manager recommends responding to a proxy contrary to the general voting guidelines of the Policy or contrary to the proxy firm recommendation with respect to such proxy and/or perceives an actual or potential conflict of interest, an exception is noted. These exceptions are promptly forwarded to the Proxy Committee to confirm or overturn any of the recommendations made by the portfolio manager.

Where potential conflicts of interest have been highlighted, the Proxy Committee will evaluate whether an actual or potential material conflict of interest exists and, if so, how it should be addressed in voting or not voting the particular proxy. Although any three members of the Proxy Committee constitute a quorum for the purposes of conducting the Proxy Committee’s business, the votes of not less than three members of the overall Proxy Committee are required to confirm any recommendations by a Heitman portfolio manager to vote any proxy contrary to the proxy firm recommendation as to how to vote that issue. With respect to actual or potential conflicts of interest, the Proxy Committee may take one of the following courses of action: (i) independently determine that no material conflict of interest exists or will likely potentially exist; (ii) respond to such proxy in strict accordance with the recommendations of the proxy firm; or (iii) take another course of action that, in the opinion of the Proxy Committee, adequately addresses the issue.

In all other cases, the proxy voting clerk will respond to the proxy in accordance with the recommendations of the proxy firm. The proxy voting clerk will prepare a proxy voting summary for the Proxy Committee on a periodic basis containing all the proxy firm proxy vote recommendations that were overridden during the period and also highlighting any proxy issues that were identified as presenting actual and/or potential conflicts of interest and how they were addressed.

PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE.

v