HOUSTON and AUSTIN, Texas, Feb. 2, 2026 /PRNewswire/ -- Third Coast Bancshares, Inc. ("Third Coast") (NYSE & NYSE Texas: TCBX), the parent company of Third Coast Bank, today announced the successful completion of its merger with Keystone Bancshares, Inc. ("Keystone"), the parent company of Keystone Bank, SSB ("Keystone Bank"), effective February 1, 2026. The combined company now has total assets in excess of $6 billion.