<div id="readability-page-1"><div><p><span>Sanchez Antonio R Jr, Director and Beneficial Owner of International Bancshares Corp [IBOC], filed a Form 144 on November 21, 2025 with the Securities and Exchange Commission proposing to sell restricted securities:</span></p><div><table><tbody><tr><td><span>Approximate Date Of Sale</span></td><td><span>11/21/25</span></td></tr><tr><td><span>Shares</span></td><td><span>100,000</span></td></tr><tr><td><span>Broker</span></td><td><span>Piper Sandler Co</span></td></tr></tbody></table></div><p><span>Prior to the sale of restricted stock, owners must file a Form 144 with the SEC.  Upon submission of the filing to the SEC the owner is permitted to sell the shares, or any fraction thereof, within 90 days.</span></p><p><span>For a free trial, or to learn more about our insider trading analysis and data services, please visit http://www.washingtonservice.com or contact us at (301) 913-5100 or send an email to info@washingtonservice.com.</span></p><p><span>Founded in 1970, The Washington Service provides securities professionals with financial, economic and public policy research and data.</span></p><span> </span></div></div>

IBOC

<p>Sanchez Antonio R Jr, Director of International Bancshares Corp, filed a Form 144 with the SEC to sell 100,000 restricted shares on November 21, 2025. The sale will be brokered by Piper Sandler Co. Form 144 is required for selling restricted stock, allowing the owner to sell within 90 days of filing.</p>

Dir Sanchez Jr Files To Sell 100,000 Of International Bancshares Corp [IBOC]