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      id="t_3_4f2aa006_45fc_dddc_c041_809b52b8fee5">  &lt;div style="margin-top: 12pt; margin-bottom: 0pt; font-size: 10pt; font-family: times new roman; font-weight: bold; text-align: center;"&gt;AMG FUNDS&lt;/div&gt;    &lt;div style="margin-top: 6pt; margin-bottom: 0pt; font-size: 10pt; font-family: times new roman; font-weight: bold; text-align: center;"&gt;AMG Yacktman Global Fund&lt;/div&gt;   &lt;div style="margin-top: 12pt; margin-bottom: 0pt; font-size: 10pt; font-family: times new roman; text-align: center;"&gt;Supplement dated September&#160;11, 2026 to the Prospectus and Statement of Additional Information, each dated May&#160;1, 2026&lt;/div&gt;   &lt;div style="margin-top: 12pt; margin-bottom: 0pt; font-size: 10pt; font-family: times new roman;"&gt;The following information supplements and supersedes any information to the contrary relating to AMG Yacktman Global Fund (the &#x201c;Fund&#x201d;), a series of AMG Funds, contained in the Fund&#x2019;s Prospectus (the &#x201c;Prospectus&#x201d;) and Statement of Additional Information (the &#x201c;SAI&#x201d;), dated as noted above.&lt;/div&gt;    &lt;div style="margin-top: 12pt; margin-bottom: 0pt; font-size: 10pt; font-family: times new roman;"&gt;Effective immediately, the Fund&#x2019;s name is changed from AMG Yacktman Global Fund to AMG Yacktman International Fund, and the Fund&#x2019;s benchmark index is changed from the MSCI World Index to the MSCI EAFE Index. All references to AMG Yacktman Global Fund in the Prospectus and SAI are deleted and replaced with &#x201c;AMG Yacktman International Fund.&#x201d;&lt;/div&gt;    &lt;div style="margin-top: 18pt; margin-bottom: 0pt; font-size: 10pt; font-family: times new roman;"&gt;&lt;span style="font-style: italic;"&gt;In addition, effective immediately, the Prospectus is revised as follows: &lt;/span&gt;&lt;/div&gt;    &lt;div style="margin-top: 6pt; margin-bottom: 0pt; margin-left: 4%; font-size: 10pt; font-family: times new roman;"&gt;The first sentence of the last paragraph of the section titled &#x201c;Summary of the Funds &#x2013; AMG Yacktman Global Fund &#x2013; Principal Investment Strategies&#x201d; on page 11 is deleted and replaced with the following:&lt;/div&gt;    &lt;div style="margin-top: 6pt; margin-bottom: 0pt; margin-left: 9%; font-size: 10pt; font-family: times new roman;"&gt;Under normal circumstances, the Fund invests at least 40% (or if conditions are not favorable, in the view of Yacktman, at least 30%) of its net assets in investments economically tied to countries other than the U.S., and the Fund will hold investments economically tied to a minimum of three countries other than the U.S.&lt;/div&gt;    &lt;div style="margin-top: 6pt; margin-bottom: 0pt; margin-left: 4%; font-size: 10pt; font-family: times new roman;"&gt;The second paragraph of the section titled &#x201c;Summary of the Funds &#x2013; AMG Yacktman Global Fund &#x2013; Performance&#x201d; beginning on page 13 is deleted and replaced with the following:&lt;/div&gt;    &lt;div style="margin-top: 6pt; margin-bottom: 0pt; margin-left: 9%; font-size: 10pt; font-family: times new roman;"&gt;As of July&#160;1, 2021, the Fund changed its name to &#x201c;AMG Yacktman Global Fund&#x201d; and made changes to its principal investment strategies. As of September&#160;11, 2026, the Fund changed its name to &#x201c;AMG Yacktman International Fund,&#x201d; adopted its current investment strategies and began comparing its performance to the MSCI EAFE Index. The Fund&#x2019;s past performance would have been different if the Fund were managed using the current investment strategies.&lt;/div&gt;    &lt;div style="margin-top: 6pt; margin-bottom: 0pt; margin-left: 4%; font-size: 10pt; font-family: times new roman;"&gt;The Average Annual Total Returns table in the section titled &#x201c;Summary of the Funds &#x2013; AMG Yacktman Global Fund &#x2013; Performance&#x201d; beginning on page 13 is deleted and replaced with the following:&lt;/div&gt;   &lt;div style="margin-top: 18pt; margin-bottom: 0pt; margin-left: 9%; font-size: 10pt; font-family: times new roman;"&gt;&lt;span style="font-style: italic;"&gt;Average Annual Total Returns as of 12/31/25 &lt;/span&gt;&lt;/div&gt;   
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&lt;tr&gt; 
&lt;td style="width: 78%;"&gt;&lt;/td&gt; 
&lt;td style="vertical-align: bottom; width: 4%;"&gt;&lt;/td&gt; 
&lt;td&gt;&lt;/td&gt; 
&lt;td&gt;&lt;/td&gt; 
&lt;td&gt;&lt;/td&gt; 
&lt;td style="vertical-align: bottom; width: 3%;"&gt;&lt;/td&gt; 
&lt;td&gt;&lt;/td&gt; 
&lt;td&gt;&lt;/td&gt; 
&lt;td&gt;&lt;/td&gt; 
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&lt;td&gt;&lt;/td&gt; 
&lt;td&gt;&lt;/td&gt; 
&lt;td&gt;&lt;/td&gt; &lt;/tr&gt; 
&lt;tr style="page-break-inside: avoid; font-family: times new roman; font-size: 8pt;"&gt; 
&lt;td style="vertical-align: bottom; white-space: nowrap;"&gt;&lt;span style="margin-top: 0pt; margin-bottom: 0pt; border-bottom: 1.00pt solid #000000; display: table-cell; font-size: 8pt; font-family: times new roman; font-weight: bold;"&gt;AMG Yacktman International Fund&lt;/span&gt;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&#160;&lt;/td&gt; 
&lt;td colspan="2" style="border-bottom: 1.00pt solid #000000; vertical-align: bottom; text-align: center;"&gt;&lt;span style="font-style: italic;"&gt;1&#160;Year&lt;/span&gt;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td colspan="2" style="border-bottom: 1.00pt solid #000000; vertical-align: bottom; text-align: center;"&gt;&lt;span style="font-style: italic;"&gt;5&#160;Years&lt;/span&gt;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td colspan="2" style="border-bottom: 1.00pt solid #000000; vertical-align: bottom; text-align: center;"&gt;&lt;span style="font-style: italic;"&gt;Since&lt;br/&gt;Inception&lt;sup style="font-size: 75%; vertical-align: top;"&gt;1&lt;/sup&gt;&lt;/span&gt;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; &lt;/tr&gt; 
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&lt;td style="vertical-align: top;"&gt; &lt;div style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;Class&#160;N&lt;/div&gt; &lt;div style="margin-top: 0pt; margin-bottom: 1pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;Return Before Taxes&lt;/div&gt; &lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;32.37&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;8.84&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;11.82&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; &lt;/tr&gt; 
&lt;tr style="page-break-inside: avoid; font-family: times new roman; font-size: 10pt;"&gt; 
&lt;td style="vertical-align: top;"&gt; &lt;div style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;Class&#160;N&lt;/div&gt; &lt;div style="margin-top: 0pt; margin-bottom: 1pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;Return After Taxes on Distributions&lt;/div&gt; &lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;27.55&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;6.82&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;10.20&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; &lt;/tr&gt; 
&lt;tr style="page-break-inside: avoid; font-family: times new roman; font-size: 10pt; background-color: #cceeff;"&gt; 
&lt;td style="vertical-align: top;"&gt; &lt;div style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;Class&#160;N&lt;/div&gt; &lt;div style="margin-top: 0pt; margin-bottom: 1pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;Return After Taxes on Distributions and Sale of Fund Shares&lt;/div&gt; &lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;20.76&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;6.55&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;9.29&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; &lt;/tr&gt; 
&lt;tr style="page-break-inside: avoid; font-family: times new roman; font-size: 10pt;"&gt; 
&lt;td style="vertical-align: top;"&gt; &lt;div style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;Class&#160;I&lt;/div&gt; &lt;div style="margin-top: 0pt; margin-bottom: 1pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;Return Before Taxes&lt;/div&gt; &lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;32.71&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;9.04&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;11.94&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; &lt;/tr&gt; 
&lt;tr style="page-break-inside: avoid; font-family: times new roman; font-size: 10pt; background-color: #cceeff;"&gt; 
&lt;td style="vertical-align: top;"&gt; &lt;div style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman; font-weight: bold;"&gt;MSCI EAFE Index&lt;sup style="font-size: 75%; vertical-align: top;"&gt;2&lt;/sup&gt;&lt;/div&gt; &lt;div style="margin-top: 0pt; margin-bottom: 1pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;(reflects no deduction for fees, expenses or taxes)&lt;/div&gt; &lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;31.22&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;8.92&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;8.76&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; &lt;/tr&gt; 
&lt;tr style="page-break-inside: avoid; font-family: times new roman; font-size: 10pt;"&gt; 
&lt;td style="vertical-align: top;"&gt; &lt;div style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;&lt;span style="font-weight: bold;"&gt;MSCI World Index&lt;/span&gt;&lt;span style="font-weight: bold;"&gt;&lt;sup style="font-size: 75%; vertical-align: top;"&gt;2 &lt;/sup&gt;&lt;/span&gt;&lt;/div&gt; &lt;div style="margin-top: 0pt; margin-bottom: 1pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;(reflects no deduction for fees, expenses or taxes)&lt;/div&gt; &lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;21.09&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;12.15&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;12.52&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;    &lt;div style="font-size: 12pt; margin-top: 0pt; margin-bottom: 0pt;"&gt;&#160;&lt;/div&gt;    
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&lt;tr style="page-break-inside: avoid;"&gt; 
&lt;td style="width: 4%; vertical-align: top; text-align: left;"&gt;&lt;sup style="font-size: 75%; vertical-align: top;"&gt;1&lt;/sup&gt;&lt;/td&gt; 
&lt;td style="vertical-align: top; text-align: left;"&gt; &lt;div style="margin-top: 0pt; margin-bottom: 0pt; font-size: 10pt; font-family: times new roman; text-align: left;"&gt;Performance shown reflects performance since the inception date of the Fund on January&#160;30, 2017.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;    
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&lt;tr style="page-break-inside: avoid;"&gt; 
&lt;td style="width: 4%; vertical-align: top; text-align: left;"&gt;&lt;sup style="font-size: 75%; vertical-align: top;"&gt;2&lt;/sup&gt;&lt;/td&gt; 
&lt;td style="vertical-align: top; text-align: left;"&gt; &lt;div style="margin-top: 0pt; margin-bottom: 0pt; font-size: 10pt; font-family: times new roman; text-align: left;"&gt;The MSCI EAFE Index replaced the MSCI World Index as the Fund&#x2019;s benchmark on September&#160;11, 2026 because the Investment Manager and Subadviser believe the new benchmark is more representative of the Fund&#x2019;s current investment strategies.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;  </oef:SupplementToProspectusTextBlock>
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      id="t_4_78a424e1_7a02_3385_38e1_a1229e669a65"> &lt;div style="margin-top: 12pt; margin-bottom: 0pt; font-size: 10pt; font-family: times new roman; font-weight: bold; text-align: center;"&gt;AMG FUNDS&lt;/div&gt;  &lt;div style="margin-top: 6pt; margin-bottom: 0pt; font-size: 10pt; font-family: times new roman; font-weight: bold; text-align: center;"&gt;AMG Yacktman Global Fund&lt;/div&gt;   &lt;div style="margin-top: 12pt; margin-bottom: 0pt; font-size: 10pt; font-family: times new roman; text-align: center;"&gt;Supplement dated September&#160;11, 2026 to the Prospectus and Statement of Additional Information, each dated May&#160;1, 2026&lt;/div&gt;   &lt;div style="margin-top: 12pt; margin-bottom: 0pt; font-size: 10pt; font-family: times new roman;"&gt;The following information supplements and supersedes any information to the contrary relating to AMG Yacktman Global Fund (the &#x201c;Fund&#x201d;), a series of AMG Funds, contained in the Fund&#x2019;s Prospectus (the &#x201c;Prospectus&#x201d;) and Statement of Additional Information (the &#x201c;SAI&#x201d;), dated as noted above.&lt;/div&gt;  &lt;div style="margin-top: 12pt; margin-bottom: 0pt; font-size: 10pt; font-family: times new roman;"&gt;Effective immediately, the Fund&#x2019;s name is changed from AMG Yacktman Global Fund to AMG Yacktman International Fund, and the Fund&#x2019;s benchmark index is changed from the MSCI World Index to the MSCI EAFE Index. All references to AMG Yacktman Global Fund in the Prospectus and SAI are deleted and replaced with &#x201c;AMG Yacktman International Fund.&#x201d;&lt;/div&gt;  &lt;div style="margin-top: 18pt; margin-bottom: 0pt; font-size: 10pt; font-family: times new roman;"&gt;&lt;span style="font-style: italic;"&gt;In addition, effective immediately, the Prospectus is revised as follows: &lt;/span&gt;&lt;/div&gt;  &lt;div style="margin-top: 6pt; margin-bottom: 0pt; margin-left: 4%; font-size: 10pt; font-family: times new roman;"&gt;The first sentence of the last paragraph of the section titled &#x201c;Summary of the Funds &#x2013; AMG Yacktman Global Fund &#x2013; Principal Investment Strategies&#x201d; on page 11 is deleted and replaced with the following:&lt;/div&gt;  &lt;div style="margin-top: 6pt; margin-bottom: 0pt; margin-left: 9%; font-size: 10pt; font-family: times new roman;"&gt;Under normal circumstances, the Fund invests at least 40% (or if conditions are not favorable, in the view of Yacktman, at least 30%) of its net assets in investments economically tied to countries other than the U.S., and the Fund will hold investments economically tied to a minimum of three countries other than the U.S.&lt;/div&gt;  &lt;div style="margin-top: 6pt; margin-bottom: 0pt; margin-left: 4%; font-size: 10pt; font-family: times new roman;"&gt;The second paragraph of the section titled &#x201c;Summary of the Funds &#x2013; AMG Yacktman Global Fund &#x2013; Performance&#x201d; beginning on page 13 is deleted and replaced with the following:&lt;/div&gt;  &lt;div style="margin-top: 6pt; margin-bottom: 0pt; margin-left: 9%; font-size: 10pt; font-family: times new roman;"&gt;As of July&#160;1, 2021, the Fund changed its name to &#x201c;AMG Yacktman Global Fund&#x201d; and made changes to its principal investment strategies. As of September&#160;11, 2026, the Fund changed its name to &#x201c;AMG Yacktman International Fund,&#x201d; adopted its current investment strategies and began comparing its performance to the MSCI EAFE Index. The Fund&#x2019;s past performance would have been different if the Fund were managed using the current investment strategies.&lt;/div&gt;  &lt;div style="margin-top: 6pt; margin-bottom: 0pt; margin-left: 4%; font-size: 10pt; font-family: times new roman;"&gt;The Average Annual Total Returns table in the section titled &#x201c;Summary of the Funds &#x2013; AMG Yacktman Global Fund &#x2013; Performance&#x201d; beginning on page 13 is deleted and replaced with the following:&lt;/div&gt;   &lt;div style="margin-top: 18pt; margin-bottom: 0pt; margin-left: 9%; font-size: 10pt; font-family: times new roman;"&gt;&lt;span style="font-style: italic;"&gt;Average Annual Total Returns as of 12/31/25 &lt;/span&gt;&lt;/div&gt;   
&lt;table cellpadding="0" cellspacing="0" style="border-collapse: collapse; font-family: times new roman; font-size: 10pt; width: 84%; border-spacing: 0px; margin: 0 auto;"&gt; 
&lt;tr&gt; 
&lt;td style="width: 78%;"&gt;&lt;/td&gt; 
&lt;td style="vertical-align: bottom; width: 4%;"&gt;&lt;/td&gt; 
&lt;td&gt;&lt;/td&gt; 
&lt;td&gt;&lt;/td&gt; 
&lt;td&gt;&lt;/td&gt; 
&lt;td style="vertical-align: bottom; width: 3%;"&gt;&lt;/td&gt; 
&lt;td&gt;&lt;/td&gt; 
&lt;td&gt;&lt;/td&gt; 
&lt;td&gt;&lt;/td&gt; 
&lt;td style="vertical-align: bottom; width: 3%;"&gt;&lt;/td&gt; 
&lt;td&gt;&lt;/td&gt; 
&lt;td&gt;&lt;/td&gt; 
&lt;td&gt;&lt;/td&gt; &lt;/tr&gt; 
&lt;tr style="page-break-inside: avoid; font-family: times new roman; font-size: 8pt;"&gt; 
&lt;td style="vertical-align: bottom; white-space: nowrap;"&gt;&lt;span style="margin-top: 0pt; margin-bottom: 0pt; border-bottom: 1.00pt solid #000000; display: table-cell; font-size: 8pt; font-family: times new roman; font-weight: bold;"&gt;AMG Yacktman International Fund&lt;/span&gt;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&#160;&lt;/td&gt; 
&lt;td colspan="2" style="border-bottom: 1.00pt solid #000000; vertical-align: bottom; text-align: center;"&gt;&lt;span style="font-style: italic;"&gt;1&#160;Year&lt;/span&gt;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td colspan="2" style="border-bottom: 1.00pt solid #000000; vertical-align: bottom; text-align: center;"&gt;&lt;span style="font-style: italic;"&gt;5&#160;Years&lt;/span&gt;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td colspan="2" style="border-bottom: 1.00pt solid #000000; vertical-align: bottom; text-align: center;"&gt;&lt;span style="font-style: italic;"&gt;Since&lt;br/&gt;Inception&lt;sup style="font-size: 75%; vertical-align: top;"&gt;1&lt;/sup&gt;&lt;/span&gt;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; &lt;/tr&gt; 
&lt;tr style="page-break-inside: avoid; font-family: times new roman; font-size: 10pt; background-color: #cceeff;"&gt; 
&lt;td style="vertical-align: top;"&gt; &lt;div style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;Class&#160;N&lt;/div&gt; &lt;div style="margin-top: 0pt; margin-bottom: 1pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;Return Before Taxes&lt;/div&gt; &lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;32.37&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;8.84&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;11.82&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; &lt;/tr&gt; 
&lt;tr style="page-break-inside: avoid; font-family: times new roman; font-size: 10pt;"&gt; 
&lt;td style="vertical-align: top;"&gt; &lt;div style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;Class&#160;N&lt;/div&gt; &lt;div style="margin-top: 0pt; margin-bottom: 1pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;Return After Taxes on Distributions&lt;/div&gt; &lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;27.55&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;6.82&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;10.20&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; &lt;/tr&gt; 
&lt;tr style="page-break-inside: avoid; font-family: times new roman; font-size: 10pt; background-color: #cceeff;"&gt; 
&lt;td style="vertical-align: top;"&gt; &lt;div style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;Class&#160;N&lt;/div&gt; &lt;div style="margin-top: 0pt; margin-bottom: 1pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;Return After Taxes on Distributions and Sale of Fund Shares&lt;/div&gt; &lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;20.76&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;6.55&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;9.29&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; &lt;/tr&gt; 
&lt;tr style="page-break-inside: avoid; font-family: times new roman; font-size: 10pt;"&gt; 
&lt;td style="vertical-align: top;"&gt; &lt;div style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;Class&#160;I&lt;/div&gt; &lt;div style="margin-top: 0pt; margin-bottom: 1pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;Return Before Taxes&lt;/div&gt; &lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;32.71&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;9.04&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;11.94&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; &lt;/tr&gt; 
&lt;tr style="page-break-inside: avoid; font-family: times new roman; font-size: 10pt; background-color: #cceeff;"&gt; 
&lt;td style="vertical-align: top;"&gt; &lt;div style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman; font-weight: bold;"&gt;MSCI EAFE Index&lt;sup style="font-size: 75%; vertical-align: top;"&gt;2&lt;/sup&gt;&lt;/div&gt; &lt;div style="margin-top: 0pt; margin-bottom: 1pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;(reflects no deduction for fees, expenses or taxes)&lt;/div&gt; &lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;31.22&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;8.92&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;8.76&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; &lt;/tr&gt; 
&lt;tr style="page-break-inside: avoid; font-family: times new roman; font-size: 10pt;"&gt; 
&lt;td style="vertical-align: top;"&gt; &lt;div style="margin-top: 0pt; margin-bottom: 0pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;&lt;span style="font-weight: bold;"&gt;MSCI World Index&lt;/span&gt;&lt;span style="font-weight: bold;"&gt;&lt;sup style="font-size: 75%; vertical-align: top;"&gt;2 &lt;/sup&gt;&lt;/span&gt;&lt;/div&gt; &lt;div style="margin-top: 0pt; margin-bottom: 1pt; margin-left: 1.00em; text-indent: -1.00em; font-size: 10pt; font-family: times new roman;"&gt;(reflects no deduction for fees, expenses or taxes)&lt;/div&gt; &lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;21.09&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;12.15&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; 
&lt;td style="vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;&#160;&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom; text-align: right;"&gt;12.52&lt;/td&gt; 
&lt;td style="white-space: nowrap; vertical-align: bottom;"&gt;%&#160;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;  &lt;div style="font-size: 12pt; margin-top: 0pt; margin-bottom: 0pt;"&gt;&#160;&lt;/div&gt;  
&lt;table cellpadding="0" cellspacing="0" style="border-collapse: collapse; font-family: times new roman; font-size: 10pt; border-spacing: 0px; width: 100%;"&gt; 
&lt;tr style="page-break-inside: avoid;"&gt; 
&lt;td style="width: 4%; vertical-align: top; text-align: left;"&gt;&lt;sup style="font-size: 75%; vertical-align: top;"&gt;1&lt;/sup&gt;&lt;/td&gt; 
&lt;td style="vertical-align: top; text-align: left;"&gt; &lt;div style="margin-top: 0pt; margin-bottom: 0pt; font-size: 10pt; font-family: times new roman; text-align: left;"&gt;Performance shown reflects performance since the inception date of the Fund on January&#160;30, 2017.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;  
&lt;table cellpadding="0" cellspacing="0" style="border-collapse: collapse; font-family: times new roman; font-size: 10pt; border-spacing: 0px; width: 100%;"&gt; 
&lt;tr style="page-break-inside: avoid;"&gt; 
&lt;td style="width: 4%; vertical-align: top; text-align: left;"&gt;&lt;sup style="font-size: 75%; vertical-align: top;"&gt;2&lt;/sup&gt;&lt;/td&gt; 
&lt;td style="vertical-align: top; text-align: left;"&gt; &lt;div style="margin-top: 0pt; margin-bottom: 0pt; font-size: 10pt; font-family: times new roman; text-align: left;"&gt;The MSCI EAFE Index replaced the MSCI World Index as the Fund&#x2019;s benchmark on September&#160;11, 2026 because the Investment Manager and Subadviser believe the new benchmark is more representative of the Fund&#x2019;s current investment strategies.&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </oef:SupplementToProspectusTextBlock>
    <dei:EntityRegistrantName
      contextRef="DefaultContext"
      id="t_1_2205674d_13fe_118c_19d5_b56fb41f184f">AMG FUNDS</dei:EntityRegistrantName>
    <oef:ProspectusDate
      contextRef="DefaultContext"
      id="t_2_849bb940_41b1_40d6_559c_35cd18e84d2c">2026-05-01</oef:ProspectusDate>
</xbrl>
