X0306 4/A 2023-03-15 2023-03-16 0 0001781730 Third Coast Bancshares, Inc. TCBX 0001966486 Bobbora William 20202 HIGHWAY 59 NORTH SUITE 190 HUMBLE TX 77338 0 1 0 0 See Remarks Common Stock 845 I By ESOP On March 16, 2023, the reporting person filed a Form 4 which inadvertently reported that he indirectly owned by ESOP 816 shares of the issuer's common stock. In fact, as reported in this amendment, the reporting person indirectly owned by ESOP 845 shares of the issuer's common stock. Executive Vice President and Chief Banking Officer /s/ R. John McWhorter, attorney-in-fact 2023-03-17