X0609 4 2026-08-14 0000036029 FIRST FINANCIAL BANKSHARES INC FFIN 0002038375 Goodrich Brian D. false P.O. BOX 701 ABILENE TX 79604 false true false false EVP - General Counsel false Common Stock 2026-08-14 4 A false 1814 0 A 7645 D Common Stock 2026-08-14 4 F false 111 35.28 D 7534 D Common Stock 2026-08-14 4 D false 452 D 7082 D Employee Stock Option, Right to Buy 35.28 2026-08-14 4 A false 3368 35.28 A 2036-08-14 Common Stock 3368 3368 D Deferred Stock Units 2026-08-14 4 A false 452 A Common Stock 452 452 D Reflects grant of restricted stock units (RSUs) which vest in three approximately equal installments on each of the three anniversaries of the grant date. The reporting person elected, in accordance with the Registrant's 2021 Omnibus Stock and Incentive Plan, to exercise his right to have the Registrant withhold 111 shares of the Registrant's common stock to pay income taxes related to vesting of previously granted restricted stock units. In connection with the vesting on August 14, 2026, of 452 restricted stock units previously granted to the reporting person, the reporting person's receipt of 452 shares of common stock was deferred resulting in the reporting person's receipt instead of 452 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the "SERP"). The reporting person is therefore reporting the disposition of 452 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination. The options vest 33.33% after one year from the grant date, 66.66% after the second year, and 100% after the third year. Michelle S. Hickox Attorney in Fact for Brian D. Goodrich 2026-08-18