First Financial Bankshares, Inc. is a financial holding company. The Company, through its subsidiaries, conducts commercial banking business. The Company's subsidiaries include First Financial Bank, National Association, Abilene, Texas; First Technology Services, Inc., Abilene, Texas; First Financial Trust & Asset Management Company, National Association, Abilene, Texas; First Financial Investments, Inc., Abilene, Texas, First Financial Insurance Agency, Inc., Abilene, Texas, Commercial Bancshares, Inc., and Commercial State Bank, Kingwood, Texas. Its loan portfolio consists of loans made to businesses, professionals, individuals, and farm and ranch operations located in the primary trade areas served by its subsidiary bank. Its securities available-for-sale include the United States Treasury securities, Obligations of the United States Government sponsored enterprises and agencies and Obligations of states and political subdivisions.