New 12-Year Corporate NNN Lease w/ 2% Rental Increases Every Year, Plus (3) 5-Year Options to Renew. Houston-based Third Coast Bancshares will acquire Austin, Texas-based Keystone Bank in a roughly $123 million deal set to close in the first quarter of 2026, the banks announced on October 22, 2025. Once the transaction is completed, the combined company will have pro forma total assets in excess of $6B.