X0306 4 2021-10-27 0 0000036029 FIRST FINANCIAL BANKSHARES INC FFIN 0001554713 Butler Ronald David II P. O. BOX 701 ABILENE TX 79510 0 1 0 0 CAO Common Stock 2021-10-27 4 F 0 595 48.85 D 131584 D The reporting person elected, in accordance with the Registrant's 2015 Restricted Stock Plan, to exercise his right to have the Registrant withhold 595 shares of the Registrant's common stock to pay income taxes related to vesting of previously granted restricted stock. By: James R. Gordon Attorney in Fact for Ronald D. Butler II 2021-10-29