0001131013 2025-12-31 2025-12-31 0001131013 gsf:S000001157Member 2025-12-31 2025-12-31 0001131013 gsf:S000001159Member 2025-12-31 2025-12-31 0001131013 gsf:S000041653Member 2025-12-31 2025-12-31 0001131013 gsf:S000049460Member 2025-12-31 2025-12-31 0001131013 gsf:S000077389Member 2025-12-31 2025-12-31 0001131013 gsf:S000077390Member 2025-12-31 2025-12-31 false 2025-12-31 497 0001131013 N-1A <div style="line-height:12.0pt;text-align:center;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">GUIDESTONE FUNDS</span> <br/></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Supplement dated July 27, 2026</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">to</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Prospectus and Summary Prospectus each dated May 1, 2026,</span> <br/><span style="color:#000000;font-family:times new roman;font-size:10pt">for the Equity Index Fund, Value Equity Index Fund, Growth Equity Index Fund, Growth Equity Fund,</span> <br/><span style="color:#000000;font-family:times new roman;font-size:10pt;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt">Small Cap Equity Fund, International Equity Index Fund and Emerging Markets Equity Fund</span><span style="color:#000000;font-family:times new roman;font-size:10pt;line-height:12pt"> </span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;margin-left:7.64%">This supplement provides new information beyond that contained in the Prospectus and Summary </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Prospectus. It should be retained and read in conjunction with the Prospectus and Summary Prospectus.</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">I.</span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">PRINCIPAL INVESTMENT STRATEGIES AND PRINCIPAL INVESTMENTS RISKS CHANGES </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">FOR THE EQUITY INDEX FUND, VALUE EQUITY INDEX FUND, GROWTH EQUITY INDEX FUND, </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">GROWTH EQUITY FUND, INTERNATIONAL EQUITY INDEX FUND AND</span> <br/><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">EMERGING MARKETS EQUITY FUND</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:0%">Effective July 27, 2026, the Equity Index Fund (EIF), Value Equity Index Fund (VEIF), Growth Equity Index Fund </span><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:0%">(GEIF) and International Equity Index Fund (IEIF) have made changes to their concentration policy. Under the </span><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:0%">revised policy, each Fund will concentrate its investments in an industry or group of industries as may be necessary to </span><span style="color:#000000;font-family:times new roman;font-size:10pt">approximate the composition of its index.</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Strategies” for the EIF, on page 123, the first bullet is deleted in its </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Under normal market conditions, the Fund will invest substantially all, and normally at least 80% of its total assets </span><span style="color:#000000;font-family:times new roman;font-size:10pt">in the equity securities (primarily common stocks and stock index derivatives) included in the S&amp;P 500</span><span style="color:#000000;font-family:times new roman;font-size:6.5pt;position:relative;top:-2.75pt">®</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> Index, in </span><span style="color:#000000;font-family:times new roman;font-size:10pt">weightings that approximate the relative composition of the securities contained in the S&amp;P 500</span><span style="color:#000000;font-family:times new roman;font-size:6.5pt;position:relative;top:-2.75pt">®</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> Index.</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> The Fund </span><span style="color:#000000;font-family:times new roman;font-size:10pt">may become non-diversified, as defined under the Investment Company Act of 1940, as amended, solely as a result </span><span style="color:#000000;font-family:times new roman;font-size:10pt">of a change in relative market capitalization or index weighting of one or more constituents of the index. In </span><span style="color:#000000;font-family:times new roman;font-size:10pt">addition, the Fund could become concentrated in an industry or group of industries if the index becomes </span><span style="color:#000000;font-family:times new roman;font-size:10pt">concentrated due to market conditions or the performance of a single or related group of issuers.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Strategies” for the EIF, on page 123, the sixth bullet is deleted in its </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Pursuing its investment strategy to duplicate the investment composition of the S&amp;P 500</span><span style="color:#000000;font-family:times new roman;font-size:6.5pt;position:relative;top:-2.75pt">®</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> Index may at times </span><span style="color:#000000;font-family:times new roman;font-size:10pt">cause the Fund to focus its investments in one or a few particular economic sectors or industries.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Strategies” for the VEIF, on page 134, the first bullet is deleted in </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">its entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Under normal market conditions, the Fund will invest substantially all, and normally at least 80% of its total assets </span><span style="color:#000000;font-family:times new roman;font-size:10pt">in the equity securities (primarily common stocks and stock index derivatives) included in the Russell 1000</span><span style="color:#000000;font-family:times new roman;font-size:6.5pt;position:relative;top:-2.75pt">®</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> Value </span><span style="color:#000000;font-family:times new roman;font-size:10pt">Index, in weightings that approximate the relative composition of the securities contained in the Russell 1000</span><span style="color:#000000;font-family:times new roman;font-size:6.5pt;position:relative;top:-2.75pt">®</span><span style="color:#000000;font-family:times new roman;font-size:10pt;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt">Value Index.</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> The Fund may become non-diversified, as defined under the Investment Company Act of 1940, as </span><span style="color:#000000;font-family:times new roman;font-size:10pt">amended, solely as a result of a change in relative market capitalization or index weighting of one or more </span><span style="color:#000000;font-family:times new roman;font-size:10pt">constituents of the index. In addition, the Fund could become concentrated in an industry or group of industries if </span><span style="color:#000000;font-family:times new roman;font-size:10pt">the index becomes concentrated due to market conditions or the performance of a single or related group of </span><span style="color:#000000;font-family:times new roman;font-size:10pt">issuers.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="line-height:12.0pt;text-align:justify;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Strategies” for the VEIF, on page 134, the sixth bullet is deleted in </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">its entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Pursuing its investment strategy to duplicate the investment composition of the Russell 1000</span><span style="color:#000000;font-family:times new roman;font-size:6.5pt;position:relative;top:-2.75pt">®</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> Value Index may at </span><span style="color:#000000;font-family:times new roman;font-size:10pt">times cause the Fund to focus its investments in one or a few particular economic sectors or industries.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Strategies” for the GEIF, on page 144, the first bullet is deleted in </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">its entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Under normal market conditions, the Fund will invest substantially all, and normally at least 80% of its total assets </span><span style="color:#000000;font-family:times new roman;font-size:10pt">in the equity securities (primarily common stocks and stock index derivatives) included in the Russell 1000</span><span style="color:#000000;font-family:times new roman;font-size:6.5pt;position:relative;top:-2.75pt">®</span><span style="color:#000000;font-family:times new roman;font-size:10pt;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt">Growth Index, in weightings that approximate the relative composition of the securities contained in the Russell </span><span style="color:#000000;font-family:times new roman;font-size:10pt">1000</span><span style="color:#000000;font-family:times new roman;font-size:6.5pt;position:relative;top:-2.75pt">®</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> Growth Index.</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> The Fund may become non-diversified, as defined under the Investment Company Act of </span><span style="color:#000000;font-family:times new roman;font-size:10pt">1940, as amended, solely as a result of a change in relative market capitalization or index weighting of one or more </span><span style="color:#000000;font-family:times new roman;font-size:10pt">constituents of the index. In addition, the Fund could become concentrated in an industry or group of industries if </span><span style="color:#000000;font-family:times new roman;font-size:10pt">the index becomes concentrated due to market conditions or the performance of a single or related group of </span><span style="color:#000000;font-family:times new roman;font-size:10pt">issuers.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Strategies” for the GEIF, on page 144, the sixth bullet is deleted in </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">its entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Pursuing its investment strategy to duplicate the investment composition of the Russell 1000</span><span style="color:#000000;font-family:times new roman;font-size:6.5pt;position:relative;top:-2.75pt">®</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> Growth Index may at </span><span style="color:#000000;font-family:times new roman;font-size:10pt">times cause the Fund to focus its investments in one or a few particular economic sectors or industries.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Strategies” for the IEIF, on page 160, the first bullet is deleted in its </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Under normal market conditions, the Fund will invest substantially all, and normally at least 80% of its total assets </span><span style="color:#000000;font-family:times new roman;font-size:10pt">in the equity securities (primarily common stocks and stock index derivatives) included in the MSCI EAFE Index, </span><span style="color:#000000;font-family:times new roman;font-size:10pt">in weightings that approximate the relative composition of the securities contained in the MSCI EAFE Index.</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> The </span><span style="color:#000000;font-family:times new roman;font-size:10pt">Fund may become non-diversified, as defined under the Investment Company Act of 1940, as amended, solely as a </span><span style="color:#000000;font-family:times new roman;font-size:10pt">result of a change in relative market capitalization or index weighting of one or more constituents of the index. In </span><span style="color:#000000;font-family:times new roman;font-size:10pt">addition, the Fund could become concentrated in an industry or group of industries if the index becomes </span><span style="color:#000000;font-family:times new roman;font-size:10pt">concentrated due to market conditions or the performance of a single or related group of issuers.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Strategies” for the IEIF, on page 160, the following is added as the </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">sixth bullet:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Pursuing its investment strategy to duplicate the investment composition of the MSCI EAFE Index may at times </span><span style="color:#000000;font-family:times new roman;font-size:10pt">cause the Fund to focus its investments in one or a few particular economic sectors or industries.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Risks” for the EIF, VEIF, GEIF and IEIF, beginning on pages 123, </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">134, 144 and 160, respectively, Sector Concentration Risk is deleted in its entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Sector Concentration Risk:</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> The Fund may be heavily invested in a particular economic sector. If the Fund </span><span style="color:#000000;font-family:times new roman;font-size:10pt">focuses on one or a few sectors, its performance is likely to be disproportionately affected by developments that </span><span style="color:#000000;font-family:times new roman;font-size:10pt">significantly affect that sector, including market, economic, political or regulatory developments. Individual </span><span style="color:#000000;font-family:times new roman;font-size:10pt">sectors may be more volatile and may perform differently than the broader market. The Fund’s performance may </span><span style="color:#000000;font-family:times new roman;font-size:10pt">also suffer if a sector does not perform as well as a Sub-Adviser expected. Prices of securities in the same sector </span><span style="color:#000000;font-family:times new roman;font-size:10pt">often change collectively regardless of the merits of individual companies.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="line-height:12.0pt;text-align:justify;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Risks” for the EIF, VEIF, GEIF and IEIF, beginning on pages 123, </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">134, 144 and 160, respectively, the following risk is added in alphabetical order:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Concentration Risk: </span><span style="color:#000000;font-family:times new roman;font-size:10pt">Except as may be necessary to approximate the composition of its index, the Fund will not </span><span style="color:#000000;font-family:times new roman;font-size:10pt">concentrate its investments in the securities of issuers whose principal business activities are in the same industry </span><span style="color:#000000;font-family:times new roman;font-size:10pt">or group of industries. If the index becomes concentrated and the Fund needs to concentrate in the same industry or </span><span style="color:#000000;font-family:times new roman;font-size:10pt">group of industries, its performance could be negatively impacted by the industry or industries in which it is </span><span style="color:#000000;font-family:times new roman;font-size:10pt">concentrated.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Risks” for the EIF, GEIF, Growth Equity Fund (GEF) and </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">Emerging Markets Equity Fund, beginning on pages 123, 144, 149 and 173, respectively, Information Technology </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">Sector Risk is deleted in its entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Information Technology Sector Risk:</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> Market or economic factors impacting information technology companies </span><span style="color:#000000;font-family:times new roman;font-size:10pt">and companies that rely heavily on technological advances (including semiconductor companies) could have a </span><span style="color:#000000;font-family:times new roman;font-size:10pt">significant effect on the value of the Fund’s investments. The value of stocks of information technology companies </span><span style="color:#000000;font-family:times new roman;font-size:10pt">and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product </span><span style="color:#000000;font-family:times new roman;font-size:10pt">cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, </span><span style="color:#000000;font-family:times new roman;font-size:10pt">including competition from foreign competitors with lower production costs. Stocks of information technology </span><span style="color:#000000;font-family:times new roman;font-size:10pt">companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, </span><span style="color:#000000;font-family:times new roman;font-size:10pt">tend to be more volatile than the overall market. Information technology companies are heavily dependent on </span><span style="color:#000000;font-family:times new roman;font-size:10pt">patent and intellectual property rights, the loss or impairment of which may adversely affect profitability.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div> <div style="line-height:12.0pt;text-align:center;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">GUIDESTONE FUNDS</span> <br/></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Supplement dated July 27, 2026</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">to</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Prospectus and Summary Prospectus each dated May 1, 2026,</span> <br/><span style="color:#000000;font-family:times new roman;font-size:10pt">for the Equity Index Fund, Value Equity Index Fund, Growth Equity Index Fund, Growth Equity Fund,</span> <br/><span style="color:#000000;font-family:times new roman;font-size:10pt;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt">Small Cap Equity Fund, International Equity Index Fund and Emerging Markets Equity Fund</span><span style="color:#000000;font-family:times new roman;font-size:10pt;line-height:12pt"> </span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;margin-left:7.64%">This supplement provides new information beyond that contained in the Prospectus and Summary </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Prospectus. It should be retained and read in conjunction with the Prospectus and Summary Prospectus.</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">I.</span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">PRINCIPAL INVESTMENT STRATEGIES AND PRINCIPAL INVESTMENTS RISKS CHANGES </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">FOR THE EQUITY INDEX FUND, VALUE EQUITY INDEX FUND, GROWTH EQUITY INDEX FUND, </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">GROWTH EQUITY FUND, INTERNATIONAL EQUITY INDEX FUND AND</span> <br/><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">EMERGING MARKETS EQUITY FUND</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:0%">Effective July 27, 2026, the Equity Index Fund (EIF), Value Equity Index Fund (VEIF), Growth Equity Index Fund </span><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:0%">(GEIF) and International Equity Index Fund (IEIF) have made changes to their concentration policy. Under the </span><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:0%">revised policy, each Fund will concentrate its investments in an industry or group of industries as may be necessary to </span><span style="color:#000000;font-family:times new roman;font-size:10pt">approximate the composition of its index.</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Strategies” for the VEIF, on page 134, the first bullet is deleted in </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">its entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Under normal market conditions, the Fund will invest substantially all, and normally at least 80% of its total assets </span><span style="color:#000000;font-family:times new roman;font-size:10pt">in the equity securities (primarily common stocks and stock index derivatives) included in the Russell 1000</span><span style="color:#000000;font-family:times new roman;font-size:6.5pt;position:relative;top:-2.75pt">®</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> Value </span><span style="color:#000000;font-family:times new roman;font-size:10pt">Index, in weightings that approximate the relative composition of the securities contained in the Russell 1000</span><span style="color:#000000;font-family:times new roman;font-size:6.5pt;position:relative;top:-2.75pt">®</span><span style="color:#000000;font-family:times new roman;font-size:10pt;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt">Value Index.</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> The Fund may become non-diversified, as defined under the Investment Company Act of 1940, as </span><span style="color:#000000;font-family:times new roman;font-size:10pt">amended, solely as a result of a change in relative market capitalization or index weighting of one or more </span><span style="color:#000000;font-family:times new roman;font-size:10pt">constituents of the index. In addition, the Fund could become concentrated in an industry or group of industries if </span><span style="color:#000000;font-family:times new roman;font-size:10pt">the index becomes concentrated due to market conditions or the performance of a single or related group of </span><span style="color:#000000;font-family:times new roman;font-size:10pt">issuers.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="line-height:12.0pt;text-align:justify;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Strategies” for the VEIF, on page 134, the sixth bullet is deleted in </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">its entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Pursuing its investment strategy to duplicate the investment composition of the Russell 1000</span><span style="color:#000000;font-family:times new roman;font-size:6.5pt;position:relative;top:-2.75pt">®</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> Value Index may at </span><span style="color:#000000;font-family:times new roman;font-size:10pt">times cause the Fund to focus its investments in one or a few particular economic sectors or industries.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Risks” for the EIF, VEIF, GEIF and IEIF, beginning on pages 123, </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">134, 144 and 160, respectively, Sector Concentration Risk is deleted in its entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Sector Concentration Risk:</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> The Fund may be heavily invested in a particular economic sector. If the Fund </span><span style="color:#000000;font-family:times new roman;font-size:10pt">focuses on one or a few sectors, its performance is likely to be disproportionately affected by developments that </span><span style="color:#000000;font-family:times new roman;font-size:10pt">significantly affect that sector, including market, economic, political or regulatory developments. Individual </span><span style="color:#000000;font-family:times new roman;font-size:10pt">sectors may be more volatile and may perform differently than the broader market. The Fund’s performance may </span><span style="color:#000000;font-family:times new roman;font-size:10pt">also suffer if a sector does not perform as well as a Sub-Adviser expected. Prices of securities in the same sector </span><span style="color:#000000;font-family:times new roman;font-size:10pt">often change collectively regardless of the merits of individual companies.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="line-height:12.0pt;text-align:justify;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Risks” for the EIF, VEIF, GEIF and IEIF, beginning on pages 123, </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">134, 144 and 160, respectively, the following risk is added in alphabetical order:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Concentration Risk: </span><span style="color:#000000;font-family:times new roman;font-size:10pt">Except as may be necessary to approximate the composition of its index, the Fund will not </span><span style="color:#000000;font-family:times new roman;font-size:10pt">concentrate its investments in the securities of issuers whose principal business activities are in the same industry </span><span style="color:#000000;font-family:times new roman;font-size:10pt">or group of industries. If the index becomes concentrated and the Fund needs to concentrate in the same industry or </span><span style="color:#000000;font-family:times new roman;font-size:10pt">group of industries, its performance could be negatively impacted by the industry or industries in which it is </span><span style="color:#000000;font-family:times new roman;font-size:10pt">concentrated.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div> <div style="line-height:12.0pt;text-align:center;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">GUIDESTONE FUNDS</span> <br/></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Supplement dated July 27, 2026</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">to</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Prospectus and Summary Prospectus each dated May 1, 2026,</span> <br/><span style="color:#000000;font-family:times new roman;font-size:10pt">for the Equity Index Fund, Value Equity Index Fund, Growth Equity Index Fund, Growth Equity Fund,</span> <br/><span style="color:#000000;font-family:times new roman;font-size:10pt;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt">Small Cap Equity Fund, International Equity Index Fund and Emerging Markets Equity Fund</span><span style="color:#000000;font-family:times new roman;font-size:10pt;line-height:12pt"> </span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;margin-left:7.64%">This supplement provides new information beyond that contained in the Prospectus and Summary </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Prospectus. It should be retained and read in conjunction with the Prospectus and Summary Prospectus.</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">I.</span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">PRINCIPAL INVESTMENT STRATEGIES AND PRINCIPAL INVESTMENTS RISKS CHANGES </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">FOR THE EQUITY INDEX FUND, VALUE EQUITY INDEX FUND, GROWTH EQUITY INDEX FUND, </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">GROWTH EQUITY FUND, INTERNATIONAL EQUITY INDEX FUND AND</span> <br/><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">EMERGING MARKETS EQUITY FUND</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:0%">Effective July 27, 2026, the Equity Index Fund (EIF), Value Equity Index Fund (VEIF), Growth Equity Index Fund </span><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:0%">(GEIF) and International Equity Index Fund (IEIF) have made changes to their concentration policy. Under the </span><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:0%">revised policy, each Fund will concentrate its investments in an industry or group of industries as may be necessary to </span><span style="color:#000000;font-family:times new roman;font-size:10pt">approximate the composition of its index.</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Strategies” for the EIF, on page 123, the first bullet is deleted in its </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Under normal market conditions, the Fund will invest substantially all, and normally at least 80% of its total assets </span><span style="color:#000000;font-family:times new roman;font-size:10pt">in the equity securities (primarily common stocks and stock index derivatives) included in the S&amp;P 500</span><span style="color:#000000;font-family:times new roman;font-size:6.5pt;position:relative;top:-2.75pt">®</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> Index, in </span><span style="color:#000000;font-family:times new roman;font-size:10pt">weightings that approximate the relative composition of the securities contained in the S&amp;P 500</span><span style="color:#000000;font-family:times new roman;font-size:6.5pt;position:relative;top:-2.75pt">®</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> Index.</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> The Fund </span><span style="color:#000000;font-family:times new roman;font-size:10pt">may become non-diversified, as defined under the Investment Company Act of 1940, as amended, solely as a result </span><span style="color:#000000;font-family:times new roman;font-size:10pt">of a change in relative market capitalization or index weighting of one or more constituents of the index. In </span><span style="color:#000000;font-family:times new roman;font-size:10pt">addition, the Fund could become concentrated in an industry or group of industries if the index becomes </span><span style="color:#000000;font-family:times new roman;font-size:10pt">concentrated due to market conditions or the performance of a single or related group of issuers.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Strategies” for the EIF, on page 123, the sixth bullet is deleted in its </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Pursuing its investment strategy to duplicate the investment composition of the S&amp;P 500</span><span style="color:#000000;font-family:times new roman;font-size:6.5pt;position:relative;top:-2.75pt">®</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> Index may at times </span><span style="color:#000000;font-family:times new roman;font-size:10pt">cause the Fund to focus its investments in one or a few particular economic sectors or industries.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Risks” for the EIF, VEIF, GEIF and IEIF, beginning on pages 123, </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">134, 144 and 160, respectively, Sector Concentration Risk is deleted in its entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Sector Concentration Risk:</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> The Fund may be heavily invested in a particular economic sector. If the Fund </span><span style="color:#000000;font-family:times new roman;font-size:10pt">focuses on one or a few sectors, its performance is likely to be disproportionately affected by developments that </span><span style="color:#000000;font-family:times new roman;font-size:10pt">significantly affect that sector, including market, economic, political or regulatory developments. Individual </span><span style="color:#000000;font-family:times new roman;font-size:10pt">sectors may be more volatile and may perform differently than the broader market. The Fund’s performance may </span><span style="color:#000000;font-family:times new roman;font-size:10pt">also suffer if a sector does not perform as well as a Sub-Adviser expected. Prices of securities in the same sector </span><span style="color:#000000;font-family:times new roman;font-size:10pt">often change collectively regardless of the merits of individual companies.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="line-height:12.0pt;text-align:justify;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Risks” for the EIF, VEIF, GEIF and IEIF, beginning on pages 123, </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">134, 144 and 160, respectively, the following risk is added in alphabetical order:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Concentration Risk: </span><span style="color:#000000;font-family:times new roman;font-size:10pt">Except as may be necessary to approximate the composition of its index, the Fund will not </span><span style="color:#000000;font-family:times new roman;font-size:10pt">concentrate its investments in the securities of issuers whose principal business activities are in the same industry </span><span style="color:#000000;font-family:times new roman;font-size:10pt">or group of industries. If the index becomes concentrated and the Fund needs to concentrate in the same industry or </span><span style="color:#000000;font-family:times new roman;font-size:10pt">group of industries, its performance could be negatively impacted by the industry or industries in which it is </span><span style="color:#000000;font-family:times new roman;font-size:10pt">concentrated.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Risks” for the EIF, GEIF, Growth Equity Fund (GEF) and </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">Emerging Markets Equity Fund, beginning on pages 123, 144, 149 and 173, respectively, Information Technology </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">Sector Risk is deleted in its entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Information Technology Sector Risk:</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> Market or economic factors impacting information technology companies </span><span style="color:#000000;font-family:times new roman;font-size:10pt">and companies that rely heavily on technological advances (including semiconductor companies) could have a </span><span style="color:#000000;font-family:times new roman;font-size:10pt">significant effect on the value of the Fund’s investments. The value of stocks of information technology companies </span><span style="color:#000000;font-family:times new roman;font-size:10pt">and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product </span><span style="color:#000000;font-family:times new roman;font-size:10pt">cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, </span><span style="color:#000000;font-family:times new roman;font-size:10pt">including competition from foreign competitors with lower production costs. Stocks of information technology </span><span style="color:#000000;font-family:times new roman;font-size:10pt">companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, </span><span style="color:#000000;font-family:times new roman;font-size:10pt">tend to be more volatile than the overall market. Information technology companies are heavily dependent on </span><span style="color:#000000;font-family:times new roman;font-size:10pt">patent and intellectual property rights, the loss or impairment of which may adversely affect profitability.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div> <div style="line-height:12.0pt;text-align:center;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">GUIDESTONE FUNDS</span> <br/></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Supplement dated July 27, 2026</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">to</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Prospectus and Summary Prospectus each dated May 1, 2026,</span> <br/><span style="color:#000000;font-family:times new roman;font-size:10pt">for the Equity Index Fund, Value Equity Index Fund, Growth Equity Index Fund, Growth Equity Fund,</span> <br/><span style="color:#000000;font-family:times new roman;font-size:10pt;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt">Small Cap Equity Fund, International Equity Index Fund and Emerging Markets Equity Fund</span><span style="color:#000000;font-family:times new roman;font-size:10pt;line-height:12pt"> </span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;margin-left:7.64%">This supplement provides new information beyond that contained in the Prospectus and Summary </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Prospectus. It should be retained and read in conjunction with the Prospectus and Summary Prospectus.</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">I.</span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">PRINCIPAL INVESTMENT STRATEGIES AND PRINCIPAL INVESTMENTS RISKS CHANGES </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">FOR THE EQUITY INDEX FUND, VALUE EQUITY INDEX FUND, GROWTH EQUITY INDEX FUND, </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">GROWTH EQUITY FUND, INTERNATIONAL EQUITY INDEX FUND AND</span> <br/><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">EMERGING MARKETS EQUITY FUND</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:0%">Effective July 27, 2026, the Equity Index Fund (EIF), Value Equity Index Fund (VEIF), Growth Equity Index Fund </span><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:0%">(GEIF) and International Equity Index Fund (IEIF) have made changes to their concentration policy. Under the </span><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:0%">revised policy, each Fund will concentrate its investments in an industry or group of industries as may be necessary to </span><span style="color:#000000;font-family:times new roman;font-size:10pt">approximate the composition of its index.</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Strategies” for the GEIF, on page 144, the first bullet is deleted in </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">its entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Under normal market conditions, the Fund will invest substantially all, and normally at least 80% of its total assets </span><span style="color:#000000;font-family:times new roman;font-size:10pt">in the equity securities (primarily common stocks and stock index derivatives) included in the Russell 1000</span><span style="color:#000000;font-family:times new roman;font-size:6.5pt;position:relative;top:-2.75pt">®</span><span style="color:#000000;font-family:times new roman;font-size:10pt;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt">Growth Index, in weightings that approximate the relative composition of the securities contained in the Russell </span><span style="color:#000000;font-family:times new roman;font-size:10pt">1000</span><span style="color:#000000;font-family:times new roman;font-size:6.5pt;position:relative;top:-2.75pt">®</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> Growth Index.</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> The Fund may become non-diversified, as defined under the Investment Company Act of </span><span style="color:#000000;font-family:times new roman;font-size:10pt">1940, as amended, solely as a result of a change in relative market capitalization or index weighting of one or more </span><span style="color:#000000;font-family:times new roman;font-size:10pt">constituents of the index. In addition, the Fund could become concentrated in an industry or group of industries if </span><span style="color:#000000;font-family:times new roman;font-size:10pt">the index becomes concentrated due to market conditions or the performance of a single or related group of </span><span style="color:#000000;font-family:times new roman;font-size:10pt">issuers.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Strategies” for the GEIF, on page 144, the sixth bullet is deleted in </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">its entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Pursuing its investment strategy to duplicate the investment composition of the Russell 1000</span><span style="color:#000000;font-family:times new roman;font-size:6.5pt;position:relative;top:-2.75pt">®</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> Growth Index may at </span><span style="color:#000000;font-family:times new roman;font-size:10pt">times cause the Fund to focus its investments in one or a few particular economic sectors or industries.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Risks” for the EIF, VEIF, GEIF and IEIF, beginning on pages 123, </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">134, 144 and 160, respectively, Sector Concentration Risk is deleted in its entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Sector Concentration Risk:</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> The Fund may be heavily invested in a particular economic sector. If the Fund </span><span style="color:#000000;font-family:times new roman;font-size:10pt">focuses on one or a few sectors, its performance is likely to be disproportionately affected by developments that </span><span style="color:#000000;font-family:times new roman;font-size:10pt">significantly affect that sector, including market, economic, political or regulatory developments. Individual </span><span style="color:#000000;font-family:times new roman;font-size:10pt">sectors may be more volatile and may perform differently than the broader market. The Fund’s performance may </span><span style="color:#000000;font-family:times new roman;font-size:10pt">also suffer if a sector does not perform as well as a Sub-Adviser expected. Prices of securities in the same sector </span><span style="color:#000000;font-family:times new roman;font-size:10pt">often change collectively regardless of the merits of individual companies.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="line-height:12.0pt;text-align:justify;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Risks” for the EIF, VEIF, GEIF and IEIF, beginning on pages 123, </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">134, 144 and 160, respectively, the following risk is added in alphabetical order:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Concentration Risk: </span><span style="color:#000000;font-family:times new roman;font-size:10pt">Except as may be necessary to approximate the composition of its index, the Fund will not </span><span style="color:#000000;font-family:times new roman;font-size:10pt">concentrate its investments in the securities of issuers whose principal business activities are in the same industry </span><span style="color:#000000;font-family:times new roman;font-size:10pt">or group of industries. If the index becomes concentrated and the Fund needs to concentrate in the same industry or </span><span style="color:#000000;font-family:times new roman;font-size:10pt">group of industries, its performance could be negatively impacted by the industry or industries in which it is </span><span style="color:#000000;font-family:times new roman;font-size:10pt">concentrated.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Risks” for the EIF, GEIF, Growth Equity Fund (GEF) and </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">Emerging Markets Equity Fund, beginning on pages 123, 144, 149 and 173, respectively, Information Technology </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">Sector Risk is deleted in its entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Information Technology Sector Risk:</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> Market or economic factors impacting information technology companies </span><span style="color:#000000;font-family:times new roman;font-size:10pt">and companies that rely heavily on technological advances (including semiconductor companies) could have a </span><span style="color:#000000;font-family:times new roman;font-size:10pt">significant effect on the value of the Fund’s investments. The value of stocks of information technology companies </span><span style="color:#000000;font-family:times new roman;font-size:10pt">and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product </span><span style="color:#000000;font-family:times new roman;font-size:10pt">cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, </span><span style="color:#000000;font-family:times new roman;font-size:10pt">including competition from foreign competitors with lower production costs. Stocks of information technology </span><span style="color:#000000;font-family:times new roman;font-size:10pt">companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, </span><span style="color:#000000;font-family:times new roman;font-size:10pt">tend to be more volatile than the overall market. Information technology companies are heavily dependent on </span><span style="color:#000000;font-family:times new roman;font-size:10pt">patent and intellectual property rights, the loss or impairment of which may adversely affect profitability.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div> <div style="line-height:12.0pt;text-align:center;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">GUIDESTONE FUNDS</span> <br/></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Supplement dated July 27, 2026</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">to</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Prospectus and Summary Prospectus each dated May 1, 2026,</span> <br/><span style="color:#000000;font-family:times new roman;font-size:10pt">for the Equity Index Fund, Value Equity Index Fund, Growth Equity Index Fund, Growth Equity Fund,</span> <br/><span style="color:#000000;font-family:times new roman;font-size:10pt;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt">Small Cap Equity Fund, International Equity Index Fund and Emerging Markets Equity Fund</span><span style="color:#000000;font-family:times new roman;font-size:10pt;line-height:12pt"> </span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;margin-left:7.64%">This supplement provides new information beyond that contained in the Prospectus and Summary </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Prospectus. It should be retained and read in conjunction with the Prospectus and Summary Prospectus.</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">I.</span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">PRINCIPAL INVESTMENT STRATEGIES AND PRINCIPAL INVESTMENTS RISKS CHANGES </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">FOR THE EQUITY INDEX FUND, VALUE EQUITY INDEX FUND, GROWTH EQUITY INDEX FUND, </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">GROWTH EQUITY FUND, INTERNATIONAL EQUITY INDEX FUND AND</span> <br/><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">EMERGING MARKETS EQUITY FUND</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Risks” for the EIF, GEIF, Growth Equity Fund (GEF) and </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">Emerging Markets Equity Fund, beginning on pages 123, 144, 149 and 173, respectively, Information Technology </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">Sector Risk is deleted in its entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Information Technology Sector Risk:</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> Market or economic factors impacting information technology companies </span><span style="color:#000000;font-family:times new roman;font-size:10pt">and companies that rely heavily on technological advances (including semiconductor companies) could have a </span><span style="color:#000000;font-family:times new roman;font-size:10pt">significant effect on the value of the Fund’s investments. The value of stocks of information technology companies </span><span style="color:#000000;font-family:times new roman;font-size:10pt">and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product </span><span style="color:#000000;font-family:times new roman;font-size:10pt">cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, </span><span style="color:#000000;font-family:times new roman;font-size:10pt">including competition from foreign competitors with lower production costs. Stocks of information technology </span><span style="color:#000000;font-family:times new roman;font-size:10pt">companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, </span><span style="color:#000000;font-family:times new roman;font-size:10pt">tend to be more volatile than the overall market. Information technology companies are heavily dependent on </span><span style="color:#000000;font-family:times new roman;font-size:10pt">patent and intellectual property rights, the loss or impairment of which may adversely affect profitability.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div> <div style="line-height:12.0pt;text-align:center;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">GUIDESTONE FUNDS</span> <br/></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Supplement dated July 27, 2026</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">to</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Prospectus and Summary Prospectus each dated May 1, 2026,</span> <br/><span style="color:#000000;font-family:times new roman;font-size:10pt">for the Equity Index Fund, Value Equity Index Fund, Growth Equity Index Fund, Growth Equity Fund,</span> <br/><span style="color:#000000;font-family:times new roman;font-size:10pt;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt">Small Cap Equity Fund, International Equity Index Fund and Emerging Markets Equity Fund</span><span style="color:#000000;font-family:times new roman;font-size:10pt;line-height:12pt"> </span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;margin-left:7.64%">This supplement provides new information beyond that contained in the Prospectus and Summary </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Prospectus. It should be retained and read in conjunction with the Prospectus and Summary Prospectus.</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">I.</span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">PRINCIPAL INVESTMENT STRATEGIES AND PRINCIPAL INVESTMENTS RISKS CHANGES </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">FOR THE EQUITY INDEX FUND, VALUE EQUITY INDEX FUND, GROWTH EQUITY INDEX FUND, </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">GROWTH EQUITY FUND, INTERNATIONAL EQUITY INDEX FUND AND</span> <br/><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">EMERGING MARKETS EQUITY FUND</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:0%">Effective July 27, 2026, the Equity Index Fund (EIF), Value Equity Index Fund (VEIF), Growth Equity Index Fund </span><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:0%">(GEIF) and International Equity Index Fund (IEIF) have made changes to their concentration policy. Under the </span><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:0%">revised policy, each Fund will concentrate its investments in an industry or group of industries as may be necessary to </span><span style="color:#000000;font-family:times new roman;font-size:10pt">approximate the composition of its index.</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Strategies” for the IEIF, on page 160, the first bullet is deleted in its </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Under normal market conditions, the Fund will invest substantially all, and normally at least 80% of its total assets </span><span style="color:#000000;font-family:times new roman;font-size:10pt">in the equity securities (primarily common stocks and stock index derivatives) included in the MSCI EAFE Index, </span><span style="color:#000000;font-family:times new roman;font-size:10pt">in weightings that approximate the relative composition of the securities contained in the MSCI EAFE Index.</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> The </span><span style="color:#000000;font-family:times new roman;font-size:10pt">Fund may become non-diversified, as defined under the Investment Company Act of 1940, as amended, solely as a </span><span style="color:#000000;font-family:times new roman;font-size:10pt">result of a change in relative market capitalization or index weighting of one or more constituents of the index. In </span><span style="color:#000000;font-family:times new roman;font-size:10pt">addition, the Fund could become concentrated in an industry or group of industries if the index becomes </span><span style="color:#000000;font-family:times new roman;font-size:10pt">concentrated due to market conditions or the performance of a single or related group of issuers.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Strategies” for the IEIF, on page 160, the following is added as the </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">sixth bullet:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Pursuing its investment strategy to duplicate the investment composition of the MSCI EAFE Index may at times </span><span style="color:#000000;font-family:times new roman;font-size:10pt">cause the Fund to focus its investments in one or a few particular economic sectors or industries.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Risks” for the EIF, VEIF, GEIF and IEIF, beginning on pages 123, </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">134, 144 and 160, respectively, Sector Concentration Risk is deleted in its entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Sector Concentration Risk:</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> The Fund may be heavily invested in a particular economic sector. If the Fund </span><span style="color:#000000;font-family:times new roman;font-size:10pt">focuses on one or a few sectors, its performance is likely to be disproportionately affected by developments that </span><span style="color:#000000;font-family:times new roman;font-size:10pt">significantly affect that sector, including market, economic, political or regulatory developments. Individual </span><span style="color:#000000;font-family:times new roman;font-size:10pt">sectors may be more volatile and may perform differently than the broader market. The Fund’s performance may </span><span style="color:#000000;font-family:times new roman;font-size:10pt">also suffer if a sector does not perform as well as a Sub-Adviser expected. Prices of securities in the same sector </span><span style="color:#000000;font-family:times new roman;font-size:10pt">often change collectively regardless of the merits of individual companies.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div><div style="line-height:12.0pt;text-align:justify;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Risks” for the EIF, VEIF, GEIF and IEIF, beginning on pages 123, </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">134, 144 and 160, respectively, the following risk is added in alphabetical order:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Concentration Risk: </span><span style="color:#000000;font-family:times new roman;font-size:10pt">Except as may be necessary to approximate the composition of its index, the Fund will not </span><span style="color:#000000;font-family:times new roman;font-size:10pt">concentrate its investments in the securities of issuers whose principal business activities are in the same industry </span><span style="color:#000000;font-family:times new roman;font-size:10pt">or group of industries. If the index becomes concentrated and the Fund needs to concentrate in the same industry or </span><span style="color:#000000;font-family:times new roman;font-size:10pt">group of industries, its performance could be negatively impacted by the industry or industries in which it is </span><span style="color:#000000;font-family:times new roman;font-size:10pt">concentrated.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div> <div style="line-height:12.0pt;text-align:center;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">GUIDESTONE FUNDS</span> <br/></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Supplement dated July 27, 2026</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">to</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt">Prospectus and Summary Prospectus each dated May 1, 2026,</span> <br/><span style="color:#000000;font-family:times new roman;font-size:10pt">for the Equity Index Fund, Value Equity Index Fund, Growth Equity Index Fund, Growth Equity Fund,</span> <br/><span style="color:#000000;font-family:times new roman;font-size:10pt;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt">Small Cap Equity Fund, International Equity Index Fund and Emerging Markets Equity Fund</span><span style="color:#000000;font-family:times new roman;font-size:10pt;line-height:12pt"> </span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;margin-left:7.64%">This supplement provides new information beyond that contained in the Prospectus and Summary </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Prospectus. It should be retained and read in conjunction with the Prospectus and Summary Prospectus.</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">I.</span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">PRINCIPAL INVESTMENT STRATEGIES AND PRINCIPAL INVESTMENTS RISKS CHANGES </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">FOR THE EQUITY INDEX FUND, VALUE EQUITY INDEX FUND, GROWTH EQUITY INDEX FUND, </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">GROWTH EQUITY FUND, INTERNATIONAL EQUITY INDEX FUND AND</span> <br/><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold;line-height:12pt"> </span><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">EMERGING MARKETS EQUITY FUND</span></div><div style="margin-top:10pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;margin-left:7.64%;text-decoration:underline">Under the heading “Principal Investment Risks” for the EIF, GEIF, Growth Equity Fund (GEF) and </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">Emerging Markets Equity Fund, beginning on pages 123, 144, 149 and 173, respectively, Information Technology </span><span style="color:#000000;font-family:times new roman;font-size:10pt;text-decoration:underline">Sector Risk is deleted in its entirety and replaced with the following:</span></div><div> <div style="clear:both;margin-top:10pt;position:relative;width:100%;"> <div style="float:left;line-height:9pt;text-align:left;width:3.22pt;"><span style="color:#000000;font-family:times new roman;font-size:7pt;position:relative;top:-1pt">●</span></div> <div style="float:left;line-height:12pt;margin-left:8.78pt;text-align:justify;width:454.00pt;"><span style="color:#000000;font-family:times new roman;font-size:10pt;font-weight:bold">Information Technology Sector Risk:</span><span style="color:#000000;font-family:times new roman;font-size:10pt"> Market or economic factors impacting information technology companies </span><span style="color:#000000;font-family:times new roman;font-size:10pt">and companies that rely heavily on technological advances (including semiconductor companies) could have a </span><span style="color:#000000;font-family:times new roman;font-size:10pt">significant effect on the value of the Fund’s investments. The value of stocks of information technology companies </span><span style="color:#000000;font-family:times new roman;font-size:10pt">and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product </span><span style="color:#000000;font-family:times new roman;font-size:10pt">cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, </span><span style="color:#000000;font-family:times new roman;font-size:10pt">including competition from foreign competitors with lower production costs. Stocks of information technology </span><span style="color:#000000;font-family:times new roman;font-size:10pt">companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, </span><span style="color:#000000;font-family:times new roman;font-size:10pt">tend to be more volatile than the overall market. Information technology companies are heavily dependent on </span><span style="color:#000000;font-family:times new roman;font-size:10pt">patent and intellectual property rights, the loss or impairment of which may adversely affect profitability.</span></div> </div> <div style="clear:both;position:relative;"> </div> </div> GUIDESTONE FUNDS 2026-05-01