INTERNATIONAL BANCSHARES CORP

Overview

We are headquartered in Laredo, Texas, with 166 facilities and 247 ATMs, providing banking services for commercial, consumer, and international customers of north, south, central and southeast Texas and the State of Oklahoma. We are one of the largest independent commercial bank holding companies headquartered in Texas. We, through our Subsidiary Banks, are in the business of gathering funds from various sources and investing those funds in order to earn a return. We, either directly or through a Subsidiary Bank, own one insurance agency, a liquidating subsidiary; a fifty-percent interest in an investment banking unit that owns a broker/dealer; a controlling interest in five merchant banking entities; and a majority ownership interest in a real-estate development partnership. Our primary earnings come from the spread between the interest earned on interest-bearing assets and the interest paid on interest-bearing liabilities. In addition, we generate income from fees on products offered to commercial, consumer, and international customers. The sales team of each of our Subsidiary Banks aims to match the right mix of products and services to each customer to best serve the customer’s needs. That process entails spending time with customers to assess their needs and servicing the sales arising from those discussions on a long-term basis. Our Subsidiary Banks have various compensation plans, including incentive-based compensation, for fairly compensating employees. Our Subsidiary Banks also have a robust process in place to review sales that support the incentive-based compensation plan to monitor the quality of the sales and identify any significant irregularities, a process that has been in place for many years.

One of our primary goals is to grow net interest income and non-interest income while adequately managing credit risk, interest rate risk and expenses. Effective management of capital is one of our critical objectives. A key measure of the performance of a banking institution is the return on average common equity (“ROE”). Our ROE for the year ended December 31, 2025 was 12.40% as compared to 13.66% for the year ended December 31, 2024.

We are highly active in facilitating trade along the United States border with Mexico. We do a significant amount of business with customers domiciled in Mexico and deposits from persons and entities domiciled in Mexico comprise a large and stable portion of the deposit base of our Subsidiary Banks. We also serve the growing Hispanic population through our facilities located throughout north, south, central, and southeast Texas and the State of Oklahoma.

Future economic conditions remain uncertain and the impact of those conditions on our business also remains uncertain. Our business depends on the willingness and ability of our customers to conduct banking and other financial

transactions. Our revenue streams, including service charges on deposits and banking and non-banking service charges and fees (ATM and interchange income), may be impacted in the future if economic conditions deteriorate. Expense control is an essential element of our long-term profitability. It has been a constant focus of ours for many years and is especially critical during periods of economic uncertainty. We have kept that focus in mind as we continue to look at operations, create efficiencies, and institute cost-control protocols at all levels. We will continue to closely monitor our efficiency ratio, a measure of non-interest expense to net interest income plus non-interest income and our overhead burden ratio, a ratio of our operating expenses against total assets. We use these measures in determining if we are accomplishing our long-term goals of controlling our costs in order to provide superior returns to our shareholders.