X0609 4/A 2026-03-16 2026-03-17 0001781730 Third Coast Bancshares, Inc. TCBX 0001332871 Wilkinson Jeffrey A 20202 HIGHWAY 59 NORTH, SUITE 190 HUMBLE TX 77338 true false false false false Stock Option (right to buy) 37.91 2027-03-16 2036-03-16 Common Stock 0 0 D This Amendment on Form 4/A (this "Amendment") amends the Form 4 filed on March 17, 2026 (the "Original Form 4") solely to correct an administrative error, which resulted in the inadvertent erroneous reporting of the granting of equity awards to the reporting person on March 16, 2026. Specifically, Table II of the Original Form 4 incorrectly reported the grant of 3,600 options to acquire common stock of the issuer to the reporting person, which did not occur. /s/ R. John McWhorter, attorney-in-fact 2026-03-18