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  <abflexbdfd-20150813:SupplementTextBlock contextRef="c">&lt;div&gt; &amp;#160;&lt;/div&gt;
&lt;div style="TEXT-ALIGN: center"&gt;&lt;img src="ablogo.jpg"/&gt;&lt;/div&gt;

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&lt;div style="FONT-SIZE: 10pt; FONT-FAMILY: Arial, Helvetica, sans-serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt"&gt;American Beacon Flexible Bond Fund&lt;/div&gt;

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&lt;div style="FONT-SIZE: 10pt; FONT-FAMILY: Arial, Helvetica, sans-serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt"&gt;Supplement dated August 13, 2015&lt;/div&gt;

&lt;div style="FONT-SIZE: 10pt; FONT-FAMILY: Arial, Helvetica, sans-serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt"&gt;to the&lt;/div&gt;

&lt;div style="MARGIN-BOTTOM: 10pt; FONT-SIZE: 10pt; FONT-FAMILY: Arial, Helvetica, sans-serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt"&gt;Prospectus dated December 29, 2014&lt;/div&gt;

&lt;div style="MARGIN-BOTTOM: 6pt; FONT-SIZE: 10pt; FONT-FAMILY: Arial, Helvetica, sans-serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt"&gt;The information below supplements the Prospectus dated December 29, 2014 and is in addition to any other supplement(s):&lt;/div&gt;

&lt;div style="FONT-SIZE: 10pt; FONT-FAMILY: Arial, Helvetica, sans-serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt"&gt;&lt;font style="FONT-SIZE: 10pt; FONT-FAMILY: Arial, Helvetica, sans-serif; FONT-STYLE: italic"&gt;On August 6, 2015, the American Beacon Funds' Board of Trustees approved the termination of GAM International Management Ltd. ("GAM") and the appointment of Payden &amp;amp; Rygel ("P&amp;amp;R") as a sub-advisor to the American Beacon Flexible Bond Fund.&lt;/font&gt;&amp;#160;&lt;font style="FONT-SIZE: 10pt; FONT-FAMILY: Arial, Helvetica, sans-serif; FONT-STYLE: italic"&gt;P&amp;amp;R is expected to begin managing the assets of the Fund currently allocated to GAM on or about August 31, 2015 ("Effective Date").&amp;#160; The changes set forth below are effective as of the Effective Date.&lt;/font&gt;&lt;/div&gt;

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&lt;div style="FONT-SIZE: 10pt; FONT-FAMILY: Arial, Helvetica, sans-serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt"&gt;In the &lt;font style="FONT-SIZE: 10pt; FONT-FAMILY: Arial, Helvetica, sans-serif; FONT-WEIGHT: bold"&gt;"Fund Summary - Principal Investment Strategies"&lt;/font&gt; section, the penultimate sentence in the first paragraph is deleted and replaced with the following:&lt;/div&gt;

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&lt;div style="FONT-SIZE: 10pt; FONT-FAMILY: Arial, Helvetica, sans-serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt"&gt;The Fund invests in fixed income instruments without restrictions on their credit quality, although under normal market conditions, the Fund's investments in non-investment grade securities, known also as high yield or "junk" bonds, is limited to 40% of the Fund's total assets. The bond portfolio will maintain an average credit quality of investment grade under normal market conditions.&lt;/div&gt;

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