Bailey David William

SEC source: 0001193125-26-355676 · ownership.xml · derivative · entry 6

Bailey David William · CIK 0001924083 · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,045

Underlying: Common Stock · 639 shares

Expires not disclosed

F3 · derivative.exercise_price: In connection with the vesting on August 16, 2026, of 639 restricted stock units previously granted to the reporting person, the reporting person's receipt of 639 shares of common stock was deferred resulting in the reporting person's receipt instead of 639 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 639 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.

F3 · price: In connection with the vesting on August 16, 2026, of 639 restricted stock units previously granted to the reporting person, the reporting person's receipt of 639 shares of common stock was deferred resulting in the reporting person's receipt instead of 639 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 639 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.

F3 · derivative.exercise_date: In connection with the vesting on August 16, 2026, of 639 restricted stock units previously granted to the reporting person, the reporting person's receipt of 639 shares of common stock was deferred resulting in the reporting person's receipt instead of 639 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 639 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.

F3 · derivative.expiration_date: In connection with the vesting on August 16, 2026, of 639 restricted stock units previously granted to the reporting person, the reporting person's receipt of 639 shares of common stock was deferred resulting in the reporting person's receipt instead of 639 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 639 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.

SEC source: 0001193125-26-355676 · ownership.xml · nonDerivative · entry 3

Bailey David William · CIK 0001924083 · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,845

F3 · shares: In connection with the vesting on August 16, 2026, of 639 restricted stock units previously granted to the reporting person, the reporting person's receipt of 639 shares of common stock was deferred resulting in the reporting person's receipt instead of 639 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 639 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.

F3 · price: In connection with the vesting on August 16, 2026, of 639 restricted stock units previously granted to the reporting person, the reporting person's receipt of 639 shares of common stock was deferred resulting in the reporting person's receipt instead of 639 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 639 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.

SEC source: 0001193125-26-355676 · ownership.xml · derivative · entry 5

Bailey David William · CIK 0001924083 · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,406

Underlying: Common Stock · 1,825 shares

Expires not disclosed

F2 · derivative.exercise_price: In connection with the vesting on August 14, 2026, of 1,825 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,825 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,825 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 1,825 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.

F2 · price: In connection with the vesting on August 14, 2026, of 1,825 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,825 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,825 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 1,825 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.

F2 · derivative.exercise_date: In connection with the vesting on August 14, 2026, of 1,825 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,825 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,825 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 1,825 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.

F2 · derivative.expiration_date: In connection with the vesting on August 14, 2026, of 1,825 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,825 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,825 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 1,825 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.

SEC source: 0001193125-26-355676 · ownership.xml · derivative · entry 4

Bailey David William · CIK 0001924083 · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,737

Underlying: Common Stock · 14,737 shares

Expires 2036-08-14

F4 · derivative.exercise_date: The options vest 33.33% after one year from the grant date, 66.66% after the second year, and 100% after the third year.

SEC source: 0001193125-26-355676 · ownership.xml · nonDerivative · entry 2

Bailey David William · CIK 0001924083 · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,484

F2 · shares: In connection with the vesting on August 14, 2026, of 1,825 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,825 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,825 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 1,825 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.

F2 · price: In connection with the vesting on August 14, 2026, of 1,825 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,825 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,825 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 1,825 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.

SEC source: 0001193125-26-355676 · ownership.xml · nonDerivative · entry 1

Bailey David William · CIK 0001924083 · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,309

F1 · shares: Reflects grant of restricted stock units (RSUs) which vest in three approximately equal installments on each of the three anniversaries of the grant date.

SEC source: 0001193125-26-211942 · ownership.xml · derivative · entry 2

Bailey David William · CIK 0001924083 · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,000

Underlying: Common Stock · 2,500 shares

Expires 2027-06-12

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001193125-26-211942 · ownership.xml · nonDerivative · entry 1

Bailey David William · CIK 0001924083 · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,372

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001193125-26-111024 · ownership.xml · derivative · entry 3

Bailey David William · CIK 0001924083 · CEO and President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,581

Underlying: Common Stock · 2,878 shares

Expires not disclosed

F2 · derivative.exercise_price: In connection with the vesting of performance stock units previously granted on August 16, 2023, Mr. Bailey's receipt of 2,878 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 2,878 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 2,878 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

F2 · price: In connection with the vesting of performance stock units previously granted on August 16, 2023, Mr. Bailey's receipt of 2,878 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 2,878 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 2,878 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

F2 · derivative.exercise_date: In connection with the vesting of performance stock units previously granted on August 16, 2023, Mr. Bailey's receipt of 2,878 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 2,878 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 2,878 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

F2 · derivative.expiration_date: In connection with the vesting of performance stock units previously granted on August 16, 2023, Mr. Bailey's receipt of 2,878 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 2,878 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 2,878 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

SEC source: 0001193125-26-111024 · ownership.xml · nonDerivative · entry 2

Bailey David William · CIK 0001924083 · CEO and President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,872

F2 · shares: In connection with the vesting of performance stock units previously granted on August 16, 2023, Mr. Bailey's receipt of 2,878 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 2,878 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 2,878 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

F2 · price: In connection with the vesting of performance stock units previously granted on August 16, 2023, Mr. Bailey's receipt of 2,878 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 2,878 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 2,878 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

SEC source: 0001193125-26-111024 · ownership.xml · nonDerivative · entry 1

Bailey David William · CIK 0001924083 · CEO and President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,750

F1 · shares: Represents shares of common stock issued upon the vesting of outstanding performance stock units that were subject to performance criteria other than the issuer's stock price.

F1 · price: Represents shares of common stock issued upon the vesting of outstanding performance stock units that were subject to performance criteria other than the issuer's stock price.

SEC source: 0001193125-26-036932 · ownership.xml · derivative · entry 2

Bailey David William · CIK 0001924083 · CEO and President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,500

Underlying: Common Stock · 2,500 shares

Expires 2027-06-12

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001193125-26-036932 · ownership.xml · nonDerivative · entry 1

Bailey David William · CIK 0001924083 · CEO and President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,872

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001193125-25-256128 · ownership.xml · nonDerivative · entry 1

Bailey David William · CIK 0001924083 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,372

SEC source: 0000950170-25-110076 · ownership.xml · derivative · entry 2

Bailey David William · CIK 0001924083 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,703

Underlying: Common Stock · 866 shares

Expires not disclosed

F1 · derivative.exercise_price: In connection with the vesting on August 16, 2025, of 866 restricted stock units previously granted to the reporting person, the reporting person's receipt of 866 shares of common stock was deferred resulting in the reporting person's receipt instead of 866 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 866 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.

F1 · price: In connection with the vesting on August 16, 2025, of 866 restricted stock units previously granted to the reporting person, the reporting person's receipt of 866 shares of common stock was deferred resulting in the reporting person's receipt instead of 866 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 866 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.

F1 · derivative.exercise_date: In connection with the vesting on August 16, 2025, of 866 restricted stock units previously granted to the reporting person, the reporting person's receipt of 866 shares of common stock was deferred resulting in the reporting person's receipt instead of 866 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 866 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.

F1 · derivative.expiration_date: In connection with the vesting on August 16, 2025, of 866 restricted stock units previously granted to the reporting person, the reporting person's receipt of 866 shares of common stock was deferred resulting in the reporting person's receipt instead of 866 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 866 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.

SEC source: 0000950170-25-110076 · ownership.xml · nonDerivative · entry 1

Bailey David William · CIK 0001924083 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,372

F1 · shares: In connection with the vesting on August 16, 2025, of 866 restricted stock units previously granted to the reporting person, the reporting person's receipt of 866 shares of common stock was deferred resulting in the reporting person's receipt instead of 866 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 866 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.

F1 · price: In connection with the vesting on August 16, 2025, of 866 restricted stock units previously granted to the reporting person, the reporting person's receipt of 866 shares of common stock was deferred resulting in the reporting person's receipt instead of 866 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 866 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.

SEC source: 0000950170-25-109651 · ownership.xml · derivative · entry 4

Bailey David William · CIK 0001924083 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,837

Underlying: Common Stock · 728 shares

Expires not disclosed

F2 · derivative.exercise_price: In connection with the vesting on August 14, 2025, of 728 restricted stock units previously granted to the reporting person, the reporting person's receipt of 728 shares of common stock was deferred resulting in the reporting person's receipt instead of 728 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 728 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.

F2 · price: In connection with the vesting on August 14, 2025, of 728 restricted stock units previously granted to the reporting person, the reporting person's receipt of 728 shares of common stock was deferred resulting in the reporting person's receipt instead of 728 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 728 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.

F2 · derivative.exercise_date: In connection with the vesting on August 14, 2025, of 728 restricted stock units previously granted to the reporting person, the reporting person's receipt of 728 shares of common stock was deferred resulting in the reporting person's receipt instead of 728 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 728 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.

F2 · derivative.expiration_date: In connection with the vesting on August 14, 2025, of 728 restricted stock units previously granted to the reporting person, the reporting person's receipt of 728 shares of common stock was deferred resulting in the reporting person's receipt instead of 728 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 728 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.

SEC source: 0000950170-25-109651 · ownership.xml · derivative · entry 3

Bailey David William · CIK 0001924083 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,062

Underlying: Common Stock · 11,062 shares

Expires 2035-08-14

F3 · derivative.exercise_date: The options vest 33.33% after one year from the grant date, 66.66% after the second year, and 100% after the third year.

SEC source: 0000950170-25-109651 · ownership.xml · nonDerivative · entry 2

Bailey David William · CIK 0001924083 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,238

F2 · shares: In connection with the vesting on August 14, 2025, of 728 restricted stock units previously granted to the reporting person, the reporting person's receipt of 728 shares of common stock was deferred resulting in the reporting person's receipt instead of 728 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 728 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.

F2 · price: In connection with the vesting on August 14, 2025, of 728 restricted stock units previously granted to the reporting person, the reporting person's receipt of 728 shares of common stock was deferred resulting in the reporting person's receipt instead of 728 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 728 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.

SEC source: 0000950170-25-109651 · ownership.xml · nonDerivative · entry 1

Bailey David William · CIK 0001924083 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,966

F1 · shares: Reflects grant of restricted stock units (RSUs) which vest in three approximately equal installments on each of the three anniversaries of the grant date.

SEC source: 0000950170-25-099073 · ownership.xml · derivative · entry 2

Bailey David William · CIK 0001924083 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2,000 shares

Expires 2025-10-27

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000950170-25-099073 · ownership.xml · nonDerivative · entry 1

Bailey David William · CIK 0001924083 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,672

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000950170-25-044445 · ownership.xml · derivative · entry 3

Bailey David William · CIK 0001924083 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,109

Underlying: Common Stock · 1,017 shares

Expires not disclosed

F2 · derivative.exercise_price: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Bailey's receipt of 1,017 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 1,017 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 1,017 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

F2 · price: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Bailey's receipt of 1,017 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 1,017 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 1,017 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

F2 · derivative.exercise_date: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Bailey's receipt of 1,017 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 1,017 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 1,017 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

F2 · derivative.expiration_date: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Bailey's receipt of 1,017 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 1,017 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 1,017 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

SEC source: 0000950170-25-044445 · ownership.xml · nonDerivative · entry 2

Bailey David William · CIK 0001924083 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,672

F2 · shares: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Bailey's receipt of 1,017 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 1,017 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 1,017 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

F2 · price: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Bailey's receipt of 1,017 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 1,017 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 1,017 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

SEC source: 0000950170-25-044445 · ownership.xml · nonDerivative · entry 1

Bailey David William · CIK 0001924083 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,689

F1 · shares: Represents shares of common stock issued upon the vesting of outstanding performance stock units that were subject to performance criteria other than the issuer's stock price.

F1 · price: Represents shares of common stock issued upon the vesting of outstanding performance stock units that were subject to performance criteria other than the issuer's stock price.

SEC source: 0000950170-24-099158 · ownership.xml · derivative · entry 3

Bailey David William · CIK 0001924083 · EVP, Commercial Banking

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,092

Underlying: Common Stock · 866 shares

Expires not disclosed

F2 · derivative.exercise_price: In connection with the vesting on August 16, 2024, of 866 restricted stock units previously granted to Mr. Bailey, Mr. Bailey's receipt of 866 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 866 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 866 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

F2 · price: In connection with the vesting on August 16, 2024, of 866 restricted stock units previously granted to Mr. Bailey, Mr. Bailey's receipt of 866 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 866 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 866 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

F2 · derivative.exercise_date: In connection with the vesting on August 16, 2024, of 866 restricted stock units previously granted to Mr. Bailey, Mr. Bailey's receipt of 866 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 866 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 866 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

F2 · derivative.expiration_date: In connection with the vesting on August 16, 2024, of 866 restricted stock units previously granted to Mr. Bailey, Mr. Bailey's receipt of 866 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 866 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 866 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

SEC source: 0000950170-24-099158 · ownership.xml · nonDerivative · entry 2

Bailey David William · CIK 0001924083 · EVP, Commercial Banking

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,672

F2 · shares: In connection with the vesting on August 16, 2024, of 866 restricted stock units previously granted to Mr. Bailey, Mr. Bailey's receipt of 866 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 866 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 866 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

F2 · price: In connection with the vesting on August 16, 2024, of 866 restricted stock units previously granted to Mr. Bailey, Mr. Bailey's receipt of 866 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 866 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 866 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

SEC source: 0000950170-24-099158 · ownership.xml · nonDerivative · entry 1

Bailey David William · CIK 0001924083 · EVP, Commercial Banking

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,538

F1 · shares: 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 32 shares of the Registrant's common stock to pay income taxes related to vesting of previously granted restricted stock units.

SEC source: 0000950170-24-097431 · ownership.xml · derivative · entry 2

Bailey David William · CIK 0001924083 · EVP, Commercial Banking

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,532

Underlying: Common Stock · 7,532 shares

Expires 2034-08-14

F2 · derivative.exercise_date: The options vest 33.33% after one year from the grant date, 66.66% after the second year, and 100% after the third year.

SEC source: 0000950170-24-097431 · ownership.xml · nonDerivative · entry 1

Bailey David William · CIK 0001924083 · EVP, Commercial Banking

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,570

F1 · shares: Reflects grant of restricted stock units (RSUs) which vest in three approximately equal installments on each of the three anniversaries of the grant date.

SEC source: 0001209191-24-004992 · doc4.xml · nonDerivative · entry 2

Bailey David William · CIK 0001924083 · EVP, Commercial Banking

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,388

F2 · shares: 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 93 shares of the Registrant's common stock to pay income taxes related to vesting of previously granted performance stock units.

SEC source: 0001209191-24-004992 · doc4.xml · nonDerivative · entry 1

Bailey David William · CIK 0001924083 · EVP, Commercial Banking

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,481

F1 · shares: Represents shares of common stock issued upon the vesting of outstanding performance stock units that were subject to performance criteria other than the issuer's stock price.

F1 · price: Represents shares of common stock issued upon the vesting of outstanding performance stock units that were subject to performance criteria other than the issuer's stock price.

SEC source: 0001209191-24-003018 · doc4.xml · derivative · entry 2

Bailey David William · CIK 0001924083 · EVP, Commercial Banking

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,000

Underlying: Common Stock · 3,000 shares

Expires 2025-10-27

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-24-003018 · doc4.xml · nonDerivative · entry 1

Bailey David William · CIK 0001924083 · EVP, Commercial Banking

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,087

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-23-046510 · doc4.xml · derivative · entry 5

Bailey David William · CIK 0001924083 · EVP, Commercial Banking

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 226

Underlying: Common Stock · 226 shares

Expires not disclosed

F3 · derivative.exercise_price: In connection with the vesting on August 16, 2023, of 226 restricted stock units previously granted to Mr. Bailey on August 16, 2022, Mr. Bailey's receipt of 226 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 226 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 226 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

F3 · price: In connection with the vesting on August 16, 2023, of 226 restricted stock units previously granted to Mr. Bailey on August 16, 2022, Mr. Bailey's receipt of 226 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 226 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 226 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

F3 · derivative.exercise_date: In connection with the vesting on August 16, 2023, of 226 restricted stock units previously granted to Mr. Bailey on August 16, 2022, Mr. Bailey's receipt of 226 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 226 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 226 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

F3 · derivative.expiration_date: In connection with the vesting on August 16, 2023, of 226 restricted stock units previously granted to Mr. Bailey on August 16, 2022, Mr. Bailey's receipt of 226 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 226 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 226 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

SEC source: 0001209191-23-046510 · doc4.xml · derivative · entry 4

Bailey David William · CIK 0001924083 · EVP, Commercial Banking

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,747

Underlying: Common Stock · 6,747 shares

Expires 2033-08-16

F4 · derivative.exercise_date: The options vest 33.33% after one year from the grant date, 66.66% after the second year, and 100% after the third year.

SEC source: 0001209191-23-046510 · doc4.xml · nonDerivative · entry 3

Bailey David William · CIK 0001924083 · EVP, Commercial Banking

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,087

F3 · shares: In connection with the vesting on August 16, 2023, of 226 restricted stock units previously granted to Mr. Bailey on August 16, 2022, Mr. Bailey's receipt of 226 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 226 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 226 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

F3 · price: In connection with the vesting on August 16, 2023, of 226 restricted stock units previously granted to Mr. Bailey on August 16, 2022, Mr. Bailey's receipt of 226 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 226 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the "SERP"). Mr. Bailey is therefore reporting the disposition of 226 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment.

SEC source: 0001209191-23-046510 · doc4.xml · nonDerivative · entry 2

Bailey David William · CIK 0001924083 · EVP, Commercial Banking

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,313

F2 · shares: Reflects grant of restricted stock units (RSUs) which vest in three approximately equal installments on each of the three anniversaries of the grant date.

SEC source: 0001209191-23-046510 · doc4.xml · nonDerivative · entry 1

Bailey David William · CIK 0001924083 · EVP, Commercial Banking

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,394

F1 · shares: 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 33 shares of the Registrant's common stock to pay income taxes related to vesting of previously granted restricted stock units.

SEC source: 0001209191-22-046676 · doc4.xml · derivative · entry 3

Bailey David William · CIK 0001924083 · EVP, Commercial Banking

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,783

Underlying: Common Stock · 2,783 shares

Expires 2032-08-16

F3 · derivative.exercise_date: The options vest 20% after one year from the grant date, 40% after the second year, 60% after the third year, 80% after the fourth year and 100% after the fifth year.

SEC source: 0001209191-22-046676 · doc4.xml · nonDerivative · entry 2

Bailey David William · CIK 0001924083 · EVP, Commercial Banking

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,427

F2 · shares: Reflects grant of restricted stock units (RSUs) which vest in three approximately equal installments on each of the three anniversaries of the grant date.

SEC source: 0001209191-22-046676 · doc4.xml · nonDerivative · entry 1

Bailey David William · CIK 0001924083 · EVP, Commercial Banking

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,749

F1 · shares: 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 33 shares of the Registrant's common stock to pay income taxes related to vesting of previously granted restricted stock units.