144 0001498441 XXXXXXXX LIVE 0000315709 International Bancshares Corp Texas 000-09439 1200 San Bernardo Avenue Laredo TX 78042 9567227611 Norton Properties LTD Board Member Common Stock UBS Financial Services Inc

1000 Harbor Blvd 3rd Floor Weehawken NJ 07086

10000 720000 62181244 05/21/2026 NASDAQ COMMON STOCK 11/13/2008 OPEN MARKET PURCHASE OPEN MARKET N 5000 11/13/2008 CASH COMMON STOCK 11/20/2008 OPEN MARKET PURCHASE OPEN MARKET N 5000 11/20/2008 CASH Y LARRY NORTON IS A BOARD MEMBER OF IBOC, NORTON PROPERTIES LTD IS THE SELLER 05/21/2026 /s/JOSEPH CASSIDY, for UBS Financial Services Inc, as attorney-in-fact for Norton Properties LTD