First Financial Bankshares, Inc. is a financial holding company. The Company, through its wholly owned subsidiary, First Financial Bankshares of Delaware, Inc., owns 10 banks, a trust company and a technology operating company and an insurance agency. These subsidiaries are First Financial Bank, National Association, Abilene, Texas; Hereford State Bank, Hereford, Texas; First Financial Bank, National Association, Sweetwater, Texas; First Financial Bank, National Association, Eastland, Texas; First Financial Bank, National Association, Cleburne, Texas; First Financial Bank, National Association, Stephenville, Texas; San Angelo National Bank, San Angelo, Texas; Weatherford National Bank, Weatherford, Texas; First Financial Bank, National Association, Southlake, Texas; First Financial Bank, National Association, Mineral Wells, Texas; First Technology Services, Inc., Abilene, Texas; First Financial Trust & Asset Management Company and First Financial Insurance Agency, Inc., Abilene, Texas.