X0508 4 2025-11-17 0001781730 Third Coast Bancshares, Inc. TCBX 0001966486 Bobbora William 20202 HIGHWAY 59 NORTH, SUITE 190 HUMBLE TX 77338 false true false false See Remarks false Common Stock 2025-11-17 4 S false 245 36.3032 D 47106 D Common Stock 2020 I By ESOP Common Stock 11750 I By IRA The reporting person executed a trade order through a broker-dealer which resulted in multiple same day, same way open market sales, with prices ranging from $36.1501 to $36.42 per share, inclusive. The reporting person has reported these sales on an aggregate basis using the weighted average price for the transactions. The reporting person undertakes to provide to the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. Executive Vice President and Chief Banking Officer /s/ R. John McWhorter, attorney-in-fact 2025-11-20