X0306 4 2012-12-21 0 0000315709 INTERNATIONAL BANCSHARES CORP IBOC 0001060529 SANCHEZ ANTONIO R JR P.O. BOX 2986 LAREDO TX 78044 1 0 1 0 COMMON STOCK 2012-12-21 5 G 0 E 353004 0 D 4880467 I HELD IN TRUST COMMON STOCK 2274269 D COMMON STOCK 1067439 I HELD IN PARTNERSHIP On December 21, 2012, a charitable lead annuity trust of which the reporting person is the trustee made a distribution of 353,004 shares to a private foundation. The reporting person disclaims beneficial ownership of the reported securities except to the extent of the pecuniary interest therein, if any. /S/ANTONIO R. SANCHEZ JR. 2012-12-24