0001193125-25-251663 Sample Contracts

AGREEMENT AND PLAN OF REORGANIZATION BY AND AMONG third coast BANCSHARES, INC., ARCH MERGER SUB, INC. AND keystone bancshares, Inc. Dated as of October 22, 2025
Agreement and Plan of Reorganization • October 27th, 2025 • Third Coast Bancshares, Inc. • Savings institutions, not federally chartered • Texas
VOTING AGREEMENT
Voting Agreement • October 27th, 2025 • Third Coast Bancshares, Inc. • Savings institutions, not federally chartered

This VOTING AGREEMENT (this “Agreement”) dated as of October 22, 2025 is executed by and among Third Coast Bancshares, Inc. (“TCBX”), a Texas corporation and registered bank holding company under the Bank Holding Company Act of 1956, as amended (the “BHCA”), Keystone Bancshares, Inc. (“Keystone”), a Texas corporation and registered bank holding company under the BHCA, Bart O. Caraway (“Proxy Holder”), as proxy, and the shareholders of Keystone listed on the signature pages to this Agreement (referred to herein individually as a “Shareholder” and collectively as the “Shareholders”). Terms with their initial letters capitalized and not otherwise defined herein have the meanings given them in the Reorganization Agreement (as defined below).

DIRECTOR SUPPORT AGREEMENT
Director Support Agreement • October 27th, 2025 • Third Coast Bancshares, Inc. • Savings institutions, not federally chartered • Texas

This DIRECTOR SUPPORT AGREEMENT (the “Agreement”) is made and entered into as of October 22, 2025, by and between Third Coast Bancshares, Inc. (“TCBX”), a Texas corporation and registered bank holding company under the Bank Holding Company Act of 1956, as amended (the “BHCA”), and [_], an individual resident of the State of [_] (“Director”). Terms with their initial letters capitalized and not otherwise defined herein have the meanings given to them in the Reorganization Agreement (as defined below).