Common Contracts

Form of Election and Transmittal Form (Common Shares) Southeast Texas Bancshares, Inc. 700 Calder Beaumont, Texas 77701 February 11, 2004

Merger Agreement • February 10th, 2004 • Texas Regional Bancshares Inc • State commercial banks

• Contract Type
  Merger Agreement
• Filed
  February 10th, 2004
• Company
  Texas Regional Bancshares Inc
• Industry
  State commercial banks

As you know, Texas Regional Bancshares, Inc. and Southeast Texas Bancshares, Inc. have entered into an Agreement and Plan of Merger dated as of November 19, 2003, pursuant to which, subject to certain conditions, including the approval and adoption of the merger agreement by the shareholders of Southeast Texas, Southeast Texas will merge with and into Texas Regional Delaware, Inc., a wholly owned subsidiary of Texas Regional. As outlined in the proxy statement/prospectus, the terms of the merger agreement allow you to choose, subject to adjustment, the type of merger consideration (either all cash, all Texas Regional common stock or part cash and part Texas Regional common stock) that you wish to receive in exchange for your Southeast Texas common shares.

Form of Election and Transmittal Form (Common Shares) Southeast Texas Bancshares, Inc. 700 Calder Beaumont, Texas 77701 , 2004

Merger Agreement • January 30th, 2004 • Texas Regional Bancshares Inc • State commercial banks

• Contract Type
  Merger Agreement
• Filed
  January 30th, 2004
• Company
  Texas Regional Bancshares Inc
• Industry
  State commercial banks

As you know, Texas Regional Bancshares, Inc. and Southeast Texas Bancshares, Inc. have entered into an Agreement and Plan of Merger dated as of November 19, 2003, pursuant to which, subject to certain conditions, including the approval and adoption of the merger agreement by the shareholders of Southeast Texas, Southeast Texas will merge with and into Texas Regional Delaware, Inc., a wholly owned subsidiary of Texas Regional. As outlined in the proxy statement/prospectus, the terms of the merger agreement allow you to choose, subject to adjustment, the type of merger consideration (either all cash, all Texas Regional common stock or part cash and part Texas Regional common stock) that you wish to receive in exchange for your Southeast Texas common shares.