FFIN

SEC source: 0000950170-25-075314 · ownership.xml · nonDerivative · entry 1

Haney Geoff · CIK 0002069144 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,946

F1 · shares: This amount represents a restricted stock grant that vests in a single installment on April 28, 2026.

SEC source: 0000950170-25-075305 · ownership.xml · nonDerivative · entry 1

Poutra Blake Matthew · CIK 0002067593 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,278

F1 · shares: This amount represents a restricted stock grant that vests in a single installment on April 28, 2026.

SEC source: 0000950170-25-057763 · ownership.xml · nonDerivative · entry 1

Nickles Robert Clark Jr · CIK 0001774337 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Limited Liability Corporation

Disclosed balance after: 95,128

F1 · ownership.nature: This indirect ownership represents shares owned by a limited liability corporation of which the reporting person and his spouse are equal beneficial owners of the common stock owned by the limited liability corporation.

SEC source: 0000950170-25-044472 · ownership.xml · derivative · entry 3

Longhofer T. Luke · CIK 0001679051 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,073

Underlying: Common Stock · 1,632 shares

Expires not disclosed

F2 · derivative.exercise_price: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Longhofer's receipt of 1,632 shares of common stock was deferred resulting in Mr. Longhofer's receipt instead of 1,632 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. Longhofer is therefore reporting the disposition of 1,632 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Longhofer's termination of employment.

F2 · price: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Longhofer's receipt of 1,632 shares of common stock was deferred resulting in Mr. Longhofer's receipt instead of 1,632 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. Longhofer is therefore reporting the disposition of 1,632 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Longhofer's termination of employment.

F2 · derivative.exercise_date: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Longhofer's receipt of 1,632 shares of common stock was deferred resulting in Mr. Longhofer's receipt instead of 1,632 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. Longhofer is therefore reporting the disposition of 1,632 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Longhofer's termination of employment.

F2 · derivative.expiration_date: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Longhofer's receipt of 1,632 shares of common stock was deferred resulting in Mr. Longhofer's receipt instead of 1,632 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. Longhofer is therefore reporting the disposition of 1,632 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Longhofer's termination of employment.

SEC source: 0000950170-25-044472 · ownership.xml · nonDerivative · entry 2

Longhofer T. Luke · CIK 0001679051 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,132

F2 · shares: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Longhofer's receipt of 1,632 shares of common stock was deferred resulting in Mr. Longhofer's receipt instead of 1,632 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. Longhofer is therefore reporting the disposition of 1,632 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Longhofer's termination of employment.

F2 · price: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Longhofer's receipt of 1,632 shares of common stock was deferred resulting in Mr. Longhofer's receipt instead of 1,632 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. Longhofer is therefore reporting the disposition of 1,632 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Longhofer's termination of employment.

SEC source: 0000950170-25-044472 · ownership.xml · nonDerivative · entry 1

Longhofer T. Luke · CIK 0001679051 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,764

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: 0000950170-25-044481 · ownership.xml · derivative · entry 3

Ruzicka John James Jr · CIK 0001773890 · EVP-CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,226

Underlying: Common Stock · 1,176 shares

Expires not disclosed

F2 · derivative.exercise_price: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Ruzicka's receipt of 1,176 shares of common stock was deferred resulting in Mr. Ruzicka's receipt instead of 1,176 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. Ruzicka is therefore reporting the disposition of 1,176 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Ruzicka's termination of employment.

F2 · price: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Ruzicka's receipt of 1,176 shares of common stock was deferred resulting in Mr. Ruzicka's receipt instead of 1,176 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. Ruzicka is therefore reporting the disposition of 1,176 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Ruzicka's termination of employment.

F2 · derivative.exercise_date: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Ruzicka's receipt of 1,176 shares of common stock was deferred resulting in Mr. Ruzicka's receipt instead of 1,176 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. Ruzicka is therefore reporting the disposition of 1,176 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Ruzicka's termination of employment.

F2 · derivative.expiration_date: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Ruzicka's receipt of 1,176 shares of common stock was deferred resulting in Mr. Ruzicka's receipt instead of 1,176 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. Ruzicka is therefore reporting the disposition of 1,176 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Ruzicka's termination of employment.

SEC source: 0000950170-25-044481 · ownership.xml · nonDerivative · entry 2

Ruzicka John James Jr · CIK 0001773890 · EVP-CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,946

F2 · shares: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Ruzicka's receipt of 1,176 shares of common stock was deferred resulting in Mr. Ruzicka's receipt instead of 1,176 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. Ruzicka is therefore reporting the disposition of 1,176 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Ruzicka's termination of employment.

F2 · price: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Ruzicka's receipt of 1,176 shares of common stock was deferred resulting in Mr. Ruzicka's receipt instead of 1,176 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. Ruzicka is therefore reporting the disposition of 1,176 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Ruzicka's termination of employment.

SEC source: 0000950170-25-044481 · ownership.xml · nonDerivative · entry 1

Ruzicka John James Jr · CIK 0001773890 · EVP-CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,122

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: 0000950170-25-044459 · ownership.xml · derivative · entry 3

Roewe Randall Allen · CIK 0001642844 · Chief Risk Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,352

Underlying: Common Stock · 1,237 shares

Expires not disclosed

F2 · derivative.exercise_price: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Roewe's receipt of 1,237 shares of common stock was deferred resulting in Mr. Roewe's receipt instead of 1,237 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. Roewe is therefore reporting the disposition of 1,237 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Roewe's termination of employment.

F2 · price: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Roewe's receipt of 1,237 shares of common stock was deferred resulting in Mr. Roewe's receipt instead of 1,237 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. Roewe is therefore reporting the disposition of 1,237 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Roewe's termination of employment.

F2 · derivative.exercise_date: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Roewe's receipt of 1,237 shares of common stock was deferred resulting in Mr. Roewe's receipt instead of 1,237 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. Roewe is therefore reporting the disposition of 1,237 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Roewe's termination of employment.

F2 · derivative.expiration_date: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Roewe's receipt of 1,237 shares of common stock was deferred resulting in Mr. Roewe's receipt instead of 1,237 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. Roewe is therefore reporting the disposition of 1,237 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Roewe's termination of employment.

SEC source: 0000950170-25-044459 · ownership.xml · nonDerivative · entry 2

Roewe Randall Allen · CIK 0001642844 · Chief Risk Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,435

F2 · shares: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Roewe's receipt of 1,237 shares of common stock was deferred resulting in Mr. Roewe's receipt instead of 1,237 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. Roewe is therefore reporting the disposition of 1,237 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Roewe's termination of employment.

F2 · price: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Roewe's receipt of 1,237 shares of common stock was deferred resulting in Mr. Roewe's receipt instead of 1,237 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. Roewe is therefore reporting the disposition of 1,237 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Roewe's termination of employment.

SEC source: 0000950170-25-044459 · ownership.xml · nonDerivative · entry 1

Roewe Randall Allen · CIK 0001642844 · Chief Risk Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,672

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: 0000950170-25-044454 · ownership.xml · derivative · entry 3

Butler Ronald David II · CIK 0001554713 · CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,027

Underlying: Common Stock · 2,542 shares

Expires not disclosed

F2 · derivative.exercise_price: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Butler's receipt of 2,542 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 2,542 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. Butler is therefore reporting the disposition of 2,542 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Butler's termination of employment.

F2 · price: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Butler's receipt of 2,542 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 2,542 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. Butler is therefore reporting the disposition of 2,542 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Butler's termination of employment.

F2 · derivative.exercise_date: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Butler's receipt of 2,542 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 2,542 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. Butler is therefore reporting the disposition of 2,542 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Butler's termination of employment.

F2 · derivative.expiration_date: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Butler's receipt of 2,542 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 2,542 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. Butler is therefore reporting the disposition of 2,542 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Butler's termination of employment.

SEC source: 0000950170-25-044454 · ownership.xml · nonDerivative · entry 2

Butler Ronald David II · CIK 0001554713 · CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 161,664

F2 · shares: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Butler's receipt of 2,542 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 2,542 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. Butler is therefore reporting the disposition of 2,542 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Butler's termination of employment.

F2 · price: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Butler's receipt of 2,542 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 2,542 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. Butler is therefore reporting the disposition of 2,542 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Butler's termination of employment.

SEC source: 0000950170-25-044454 · ownership.xml · nonDerivative · entry 1

Butler Ronald David II · CIK 0001554713 · CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 164,206

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: 0000950170-25-044445 · 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: 0000950170-25-044428 · ownership.xml · nonDerivative · entry 2

McVey J. Kyle · CIK 0001688452 · EVP, Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,804

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 226 shares of the Registrant's common stock to pay income taxes related to vesting of previously granted performance stock units.

SEC source: 0000950170-25-044428 · ownership.xml · nonDerivative · entry 1

McVey J. Kyle · CIK 0001688452 · EVP, Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,030

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: 0000950170-25-044414 · ownership.xml · derivative · entry 5

DUESER F SCOTT · CIK 0001243211 · Director · Chairman and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,149

Underlying: Common Stock · 15,591 shares

Expires not disclosed

F4 · derivative.exercise_price: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Dueser's receipt of 15,591 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 15,591 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. Dueser is therefore reporting the disposition of 15,591 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment.

F4 · price: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Dueser's receipt of 15,591 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 15,591 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. Dueser is therefore reporting the disposition of 15,591 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment.

F4 · derivative.exercise_date: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Dueser's receipt of 15,591 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 15,591 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. Dueser is therefore reporting the disposition of 15,591 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment.

F4 · derivative.expiration_date: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Dueser's receipt of 15,591 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 15,591 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. Dueser is therefore reporting the disposition of 15,591 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment.

SEC source: 0000950170-25-044414 · ownership.xml · nonDerivative · entry 2

DUESER F SCOTT · CIK 0001243211 · Director · Chairman and CEO

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 513,608

F4 · shares: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Dueser's receipt of 15,591 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 15,591 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. Dueser is therefore reporting the disposition of 15,591 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment.

F4 · price: In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Dueser's receipt of 15,591 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 15,591 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. Dueser is therefore reporting the disposition of 15,591 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment.

F2 · ownership.nature: Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary.

SEC source: 0000950170-25-044414 · ownership.xml · nonDerivative · entry 1

DUESER F SCOTT · CIK 0001243211 · Director · Chairman and CEO

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 529,199

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.

F2 · ownership.nature: Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary.

SEC source: 0000950170-25-038403 · ownership.xml · nonDerivative · entry 1

TROTTER JOHNNY · CIK 0001251133 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 949,371

SEC source: 0000950170-25-026564 · ownership.xml · derivative · entry 2

Longhofer T. Luke · CIK 0001679051 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,600

Underlying: Common Stock · 1,200 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: 0000950170-25-026564 · ownership.xml · nonDerivative · entry 1

Longhofer T. Luke · CIK 0001679051 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,132

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: 0000950170-25-011041 · ownership.xml · nonDerivative · entry 2

Nickles Robert Clark Jr · CIK 0001774337 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Limited Liability Corporation

Disclosed balance after: 94,579

F1 · ownership.nature: This indirect ownership represents shares owned by a limited liability corporation of which the reporting person and his spouse are equal beneficial owners of the common stock owned by the limited liability corporation.

SEC source: 0000950170-25-011013 · ownership.xml · derivative · entry 2

Ruzicka John James Jr · CIK 0001773890 · EVP-CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,300

Underlying: Common Stock · 500 shares

Expires 2029-06-26

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: 0000950170-25-011013 · ownership.xml · nonDerivative · entry 1

Ruzicka John James Jr · CIK 0001773890 · EVP-CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,946

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: 0000950170-25-004725 · ownership.xml · nonDerivative · entry 1

DUESER F SCOTT · CIK 0001243211 · Director · Chairman and CEO

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 513,608

F1 · shares: Mr. Dueser previously contributed shares of First Financial Bankshares, Inc. common stock to a grantor retained annuity trust for the benefit of himself and his three adult children. Upon termination of the trust on January 9, 2024, 144,664 shares were transferred to each of the reporting person's children. Mr. Dueser no longer has any beneficial ownership or pecuniary interest in such shares.

F2 · ownership.nature: Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary.

SEC source: 0000950170-24-136478 · ownership.xml · nonDerivative · entry 2

DUESER F SCOTT · CIK 0001243211 · Director · Chairman, President and CEO

10b5-1 filing: No plan indicated

Ownership: Indirect · By Partnership

Disclosed balance after: 471,004

F3 · shares: The sale of the shares was made as part of the family limited partnership's diversification plan in connection with the manager's fiduciary obligations.

F4 · ownership.nature: Represents shares that are owned by a family limited partnership of which Mr. Dueser serves as manager of the general partner and to which he disclaims beneficial ownership with respect to 353,253 shares. This report should not be deemed an admission that Mr. Dueser is the beneficial owner of these shares for purposes of Section 16 or any other purpose.

SEC source: 0000950170-24-136478 · ownership.xml · nonDerivative · entry 1

DUESER F SCOTT · CIK 0001243211 · Director · Chairman, President and CEO

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 947,600

F1 · shares: This transaction involved the reporting person's gift of 11,000 shares of the issuer's stock to the Dueser Foundation. The reporting person no longer has any beneficial ownership or pecuniary interest in such shares.

F2 · ownership.nature: Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary.

SEC source: 0000950170-24-136449 · ownership.xml · nonDerivative · entry 1

Thaxton Kirk W · CIK 0001657071 · Trust Company CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 88,801

SEC source: 0000950170-24-135651 · ownership.xml · derivative · entry 2

McVey J. Kyle · CIK 0001688452 · EVP, Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,800

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: 0000950170-24-135651 · ownership.xml · nonDerivative · entry 1

McVey J. Kyle · CIK 0001688452 · EVP, Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,103

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: 0000950170-24-129369 · ownership.xml · nonDerivative · entry 1

Edwards Murray Hamilton · CIK 0001356117 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 41,834

SEC source: 0000950170-24-128107 · ownership.xml · derivative · entry 2

Longhofer T. Luke · CIK 0001679051 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,800

Underlying: Common Stock · 3,100 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: 0000950170-24-128107 · ownership.xml · nonDerivative · entry 1

Longhofer T. Luke · CIK 0001679051 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,932

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: 0000950170-24-127194 · ownership.xml · nonDerivative · entry 1

COPELAND DAVID L · CIK 0001033746 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,350

SEC source: 0000950170-24-125483 · ownership.xml · nonDerivative · entry 1

Butler Ronald David II · CIK 0001554713 · CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 161,664

SEC source: 0000950170-24-124098 · ownership.xml · nonDerivative · entry 1

Denny Michael B. · CIK 0001774246 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Limited Partnership

Disclosed balance after: 101,085

F1 · ownership.nature: This indirect ownership represents shares owned by a limited partnership of which the reporting person and his spouse are beneficial owners of the common stock owned by the limited partnership.

SEC source: 0000950170-24-102446 · ownership.xml · derivative · entry 2

Butler Ronald David II · CIK 0001554713 · CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,150

Underlying: Common Stock · 9,850 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: 0000950170-24-102446 · ownership.xml · nonDerivative · entry 1

Butler Ronald David II · CIK 0001554713 · CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 162,664

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: 0000950170-24-099235 · ownership.xml · derivative · entry 3

Butler Ronald David II · CIK 0001554713 · CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,485

Underlying: Common Stock · 1,920 shares

Expires not disclosed

F2 · derivative.exercise_price: In connection with the vesting on August 16, 2024, of 1,920 restricted stock units previously granted to Mr. Butler, Mr. Butler's receipt of 1,920 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 1,920 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. Butler is therefore reporting the disposition of 1,920 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Butler's termination of employment.

F2 · price: In connection with the vesting on August 16, 2024, of 1,920 restricted stock units previously granted to Mr. Butler, Mr. Butler's receipt of 1,920 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 1,920 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. Butler is therefore reporting the disposition of 1,920 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Butler's termination of employment.

F2 · derivative.exercise_date: In connection with the vesting on August 16, 2024, of 1,920 restricted stock units previously granted to Mr. Butler, Mr. Butler's receipt of 1,920 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 1,920 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. Butler is therefore reporting the disposition of 1,920 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Butler's termination of employment.

F2 · derivative.expiration_date: In connection with the vesting on August 16, 2024, of 1,920 restricted stock units previously granted to Mr. Butler, Mr. Butler's receipt of 1,920 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 1,920 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. Butler is therefore reporting the disposition of 1,920 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Butler's termination of employment.

SEC source: 0000950170-24-099235 · ownership.xml · nonDerivative · entry 2

Butler Ronald David II · CIK 0001554713 · CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 152,814

F2 · shares: In connection with the vesting on August 16, 2024, of 1,920 restricted stock units previously granted to Mr. Butler, Mr. Butler's receipt of 1,920 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 1,920 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. Butler is therefore reporting the disposition of 1,920 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Butler's termination of employment.

F2 · price: In connection with the vesting on August 16, 2024, of 1,920 restricted stock units previously granted to Mr. Butler, Mr. Butler's receipt of 1,920 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 1,920 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. Butler is therefore reporting the disposition of 1,920 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Butler's termination of employment.

SEC source: 0000950170-24-099235 · ownership.xml · nonDerivative · entry 1

Butler Ronald David II · CIK 0001554713 · CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 154,734

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 139 shares of the Registrant's common stock to pay income taxes related to vesting of previously granted restricted stock units.

SEC source: 0000950170-24-099231 · ownership.xml · derivative · entry 2

Hickox Michelle S · CIK 0001573445 · EVP/CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,355

Underlying: Common Stock · 1,355 shares

Expires not disclosed

F1 · derivative.exercise_price: In connection with the vesting on August 16, 2024, of 1,355 restricted stock units previously granted to Mrs. Hickox, Mrs. Hickox's receipt of 1,355 shares of common stock was deferred resulting in Mrs. Hickox's receipt instead of 1,355 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"). Mrs. Hickox is therefore reporting the disposition of 1,355 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mrs. Hickox's termination of employment.

F1 · price: In connection with the vesting on August 16, 2024, of 1,355 restricted stock units previously granted to Mrs. Hickox, Mrs. Hickox's receipt of 1,355 shares of common stock was deferred resulting in Mrs. Hickox's receipt instead of 1,355 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"). Mrs. Hickox is therefore reporting the disposition of 1,355 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mrs. Hickox's termination of employment.

F1 · derivative.exercise_date: In connection with the vesting on August 16, 2024, of 1,355 restricted stock units previously granted to Mrs. Hickox, Mrs. Hickox's receipt of 1,355 shares of common stock was deferred resulting in Mrs. Hickox's receipt instead of 1,355 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"). Mrs. Hickox is therefore reporting the disposition of 1,355 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mrs. Hickox's termination of employment.

F1 · derivative.expiration_date: In connection with the vesting on August 16, 2024, of 1,355 restricted stock units previously granted to Mrs. Hickox, Mrs. Hickox's receipt of 1,355 shares of common stock was deferred resulting in Mrs. Hickox's receipt instead of 1,355 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"). Mrs. Hickox is therefore reporting the disposition of 1,355 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mrs. Hickox's termination of employment.

SEC source: 0000950170-24-099231 · ownership.xml · nonDerivative · entry 1

Hickox Michelle S · CIK 0001573445 · EVP/CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,615

F1 · shares: In connection with the vesting on August 16, 2024, of 1,355 restricted stock units previously granted to Mrs. Hickox, Mrs. Hickox's receipt of 1,355 shares of common stock was deferred resulting in Mrs. Hickox's receipt instead of 1,355 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"). Mrs. Hickox is therefore reporting the disposition of 1,355 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mrs. Hickox's termination of employment.

F1 · price: In connection with the vesting on August 16, 2024, of 1,355 restricted stock units previously granted to Mrs. Hickox, Mrs. Hickox's receipt of 1,355 shares of common stock was deferred resulting in Mrs. Hickox's receipt instead of 1,355 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"). Mrs. Hickox is therefore reporting the disposition of 1,355 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mrs. Hickox's termination of employment.

SEC source: 0000950170-24-099197 · ownership.xml · derivative · entry 4

DUESER F SCOTT · CIK 0001243211 · Director · Chairman, President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,558

Underlying: Common Stock · 6,736 shares

Expires not disclosed

F1 · derivative.exercise_price: In connection with the vesting on August 16, 2024, of 6,736 restricted stock units previously granted to Mr. Dueser, Mr. Dueser's receipt of 6,736 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 6,736 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. Dueser is therefore reporting the disposition of 6,736 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment.

F1 · price: In connection with the vesting on August 16, 2024, of 6,736 restricted stock units previously granted to Mr. Dueser, Mr. Dueser's receipt of 6,736 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 6,736 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. Dueser is therefore reporting the disposition of 6,736 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment.

F1 · derivative.exercise_date: In connection with the vesting on August 16, 2024, of 6,736 restricted stock units previously granted to Mr. Dueser, Mr. Dueser's receipt of 6,736 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 6,736 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. Dueser is therefore reporting the disposition of 6,736 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment.

F1 · derivative.expiration_date: In connection with the vesting on August 16, 2024, of 6,736 restricted stock units previously granted to Mr. Dueser, Mr. Dueser's receipt of 6,736 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 6,736 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. Dueser is therefore reporting the disposition of 6,736 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment.

SEC source: 0000950170-24-099197 · ownership.xml · nonDerivative · entry 1

DUESER F SCOTT · CIK 0001243211 · Director · Chairman, President and CEO

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 958,600

F1 · shares: In connection with the vesting on August 16, 2024, of 6,736 restricted stock units previously granted to Mr. Dueser, Mr. Dueser's receipt of 6,736 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 6,736 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. Dueser is therefore reporting the disposition of 6,736 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment.

F1 · price: In connection with the vesting on August 16, 2024, of 6,736 restricted stock units previously granted to Mr. Dueser, Mr. Dueser's receipt of 6,736 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 6,736 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. Dueser is therefore reporting the disposition of 6,736 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Dueser's termination of employment.

F2 · ownership.nature: Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary.