FFIN

SEC source: 0001193125-26-101706 · ownership.xml · nonDerivative · entry 2

Hickox Michelle S · CIK 0001573445 · EVP/CFO

10b5-1 filing: No plan indicated

Ownership: Indirect · By IRA

Disclosed balance after: 14,600

SEC source: 0001193125-26-101706 · ownership.xml · nonDerivative · entry 1

Hickox Michelle S · CIK 0001573445 · EVP/CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,861

SEC source: 0001193125-26-098854 · ownership.xml · nonDerivative · entry 1

Goodrich Brian D. · CIK 0002038375 · EVP - General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,831

SEC source: 0001193125-26-098817 · ownership.xml · nonDerivative · entry 1

Davis Sally Pope · CIK 0002026030 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,371

SEC source: 0001193125-26-095828 · ownership.xml · nonDerivative · entry 1

Goodrich Brian D. · CIK 0002038375 · EVP - General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,093

SEC source: 0001193125-26-095810 · ownership.xml · nonDerivative · entry 1

TROTTER JOHNNY · CIK 0001251133 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 955,444

SEC source: 0001193125-26-088303 · ownership.xml · nonDerivative · entry 1

Davis Sally Pope · CIK 0002026030 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,571

SEC source: 0001193125-26-064487 · ownership.xml · nonDerivative · entry 1

Haney Geoff · CIK 0002069144 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,146

SEC source: 0001193125-26-040700 · ownership.xml · nonDerivative · entry 1

Edwards Murray Hamilton · CIK 0001356117 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 42,634

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: 0001193125-26-034646 · 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: 96,960

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: 0001193125-25-322880 · 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: 502,507

F1 · shares: This transaction includes the reporting person's gift of 12,800 shares of the issuer's stock to the Dueser Foundation and 2,432 shares to family members. 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: 0001193125-25-314485 · ownership.xml · derivative · entry 3

Longhofer T. Luke · CIK 0001679051 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,500

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: 0001193125-25-314485 · ownership.xml · nonDerivative · entry 2

Longhofer T. Luke · CIK 0001679051 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,970

F1 · shares: This donation was a charitable gift to a nonprofit foundation.

SEC source: 0001193125-25-314485 · ownership.xml · nonDerivative · entry 1

Longhofer T. Luke · CIK 0001679051 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,930

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: 0001193125-25-297268 · ownership.xml · nonDerivative · entry 1

Butler Ronald David II · CIK 0001554713 · CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 170,952

F1 · shares: This distribution was a charitable gift to a nonprofit foundation.

SEC source: 0001193125-25-261881 · ownership.xml · nonDerivative · entry 1

Davis Sally Pope · CIK 0002026030 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,971

SEC source: 0001193125-25-256186 · 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: 96,331

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: 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: 0001193125-25-255746 · ownership.xml · nonDerivative · entry 1

Hickox Michelle S · CIK 0001573445 · EVP/CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,461

SEC source: 0000950170-25-110097 · ownership.xml · derivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,370

Underlying: Common Stock · 3,464 shares

Expires not disclosed

F2 · derivative.exercise_price: In connection with the vesting on August 16, 2025, of 3,464 restricted stock units previously granted to the reporting person, the reporting person's receipt of 3,464 shares of common stock was deferred resulting in the reporting person's receipt instead of 3,464 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 3,464 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 16, 2025, of 3,464 restricted stock units previously granted to the reporting person, the reporting person's receipt of 3,464 shares of common stock was deferred resulting in the reporting person's receipt instead of 3,464 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 3,464 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 16, 2025, of 3,464 restricted stock units previously granted to the reporting person, the reporting person's receipt of 3,464 shares of common stock was deferred resulting in the reporting person's receipt instead of 3,464 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 3,464 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 16, 2025, of 3,464 restricted stock units previously granted to the reporting person, the reporting person's receipt of 3,464 shares of common stock was deferred resulting in the reporting person's receipt instead of 3,464 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 3,464 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: 0000950170-25-110097 · 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: 517,739

F2 · shares: In connection with the vesting on August 16, 2025, of 3,464 restricted stock units previously granted to the reporting person, the reporting person's receipt of 3,464 shares of common stock was deferred resulting in the reporting person's receipt instead of 3,464 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 3,464 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 16, 2025, of 3,464 restricted stock units previously granted to the reporting person, the reporting person's receipt of 3,464 shares of common stock was deferred resulting in the reporting person's receipt instead of 3,464 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 3,464 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 · ownership.nature: Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary.

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: 0000950170-25-110083 · ownership.xml · derivative · entry 2

Hickox Michelle S · CIK 0001573445 · EVP/CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,912

Underlying: Common Stock · 1,354 shares

Expires not disclosed

F1 · derivative.exercise_price: In connection with the vesting on August 16, 2025, of 1,354 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,354 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,354 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 1,354 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 1,354 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,354 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,354 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 1,354 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 1,354 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,354 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,354 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 1,354 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 1,354 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,354 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,354 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 1,354 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: 0000950170-25-110083 · ownership.xml · nonDerivative · entry 1

Hickox Michelle S · CIK 0001573445 · EVP/CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,461

F1 · shares: In connection with the vesting on August 16, 2025, of 1,354 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,354 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,354 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 1,354 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 1,354 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,354 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,354 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 1,354 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: 0000950170-25-110068 · ownership.xml · derivative · entry 2

Ruzicka John James Jr · CIK 0001773890 · EVP-CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,467

Underlying: Common Stock · 788 shares

Expires not disclosed

F1 · derivative.exercise_price: In connection with the vesting on August 16, 2025, of 788 restricted stock units previously granted to the reporting person, the reporting person's receipt of 788 shares of common stock was deferred resulting in the reporting person's receipt instead of 788 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 788 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 788 restricted stock units previously granted to the reporting person, the reporting person's receipt of 788 shares of common stock was deferred resulting in the reporting person's receipt instead of 788 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 788 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 788 restricted stock units previously granted to the reporting person, the reporting person's receipt of 788 shares of common stock was deferred resulting in the reporting person's receipt instead of 788 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 788 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 788 restricted stock units previously granted to the reporting person, the reporting person's receipt of 788 shares of common stock was deferred resulting in the reporting person's receipt instead of 788 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 788 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: 0000950170-25-110068 · ownership.xml · nonDerivative · entry 1

Ruzicka John James Jr · CIK 0001773890 · EVP-CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,986

F1 · shares: In connection with the vesting on August 16, 2025, of 788 restricted stock units previously granted to the reporting person, the reporting person's receipt of 788 shares of common stock was deferred resulting in the reporting person's receipt instead of 788 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 788 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 788 restricted stock units previously granted to the reporting person, the reporting person's receipt of 788 shares of common stock was deferred resulting in the reporting person's receipt instead of 788 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 788 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: 0000950170-25-110065 · 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: 26,021

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

SEC source: 0000950170-25-110061 · ownership.xml · derivative · entry 2

Longhofer T. Luke · CIK 0001679051 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,845

Underlying: Common Stock · 1,077 shares

Expires not disclosed

F1 · derivative.exercise_price: In connection with the vesting on August 16, 2025, of 1,077 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,077 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,077 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 1,077 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 1,077 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,077 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,077 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 1,077 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 1,077 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,077 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,077 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 1,077 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 1,077 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,077 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,077 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 1,077 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: 0000950170-25-110061 · ownership.xml · nonDerivative · entry 1

Longhofer T. Luke · CIK 0001679051 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,830

F1 · shares: In connection with the vesting on August 16, 2025, of 1,077 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,077 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,077 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 1,077 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 1,077 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,077 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,077 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 1,077 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: 0000950170-25-110058 · ownership.xml · derivative · entry 2

Roewe Randall Allen · CIK 0001642844 · Chief Risk Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,757

Underlying: Common Stock · 839 shares

Expires not disclosed

F1 · derivative.exercise_price: In connection with the vesting on August 16, 2025, of 839 restricted stock units previously granted to the reporting person, the reporting person's receipt of 839 shares of common stock was deferred resulting in the reporting person's receipt instead of 839 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 839 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 839 restricted stock units previously granted to the reporting person, the reporting person's receipt of 839 shares of common stock was deferred resulting in the reporting person's receipt instead of 839 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 839 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 839 restricted stock units previously granted to the reporting person, the reporting person's receipt of 839 shares of common stock was deferred resulting in the reporting person's receipt instead of 839 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 839 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 839 restricted stock units previously granted to the reporting person, the reporting person's receipt of 839 shares of common stock was deferred resulting in the reporting person's receipt instead of 839 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 839 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: 0000950170-25-110058 · ownership.xml · nonDerivative · entry 1

Roewe Randall Allen · CIK 0001642844 · Chief Risk Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,315

F1 · shares: In connection with the vesting on August 16, 2025, of 839 restricted stock units previously granted to the reporting person, the reporting person's receipt of 839 shares of common stock was deferred resulting in the reporting person's receipt instead of 839 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 839 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 839 restricted stock units previously granted to the reporting person, the reporting person's receipt of 839 shares of common stock was deferred resulting in the reporting person's receipt instead of 839 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 839 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: 0000950170-25-110056 · ownership.xml · derivative · entry 2

Butler Ronald David II · CIK 0001554713 · CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,168

Underlying: Common Stock · 1,919 shares

Expires not disclosed

F1 · derivative.exercise_price: In connection with the vesting on August 16, 2025, of 1,919 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,919 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,919 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 1,919 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 1,919 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,919 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,919 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 1,919 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 1,919 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,919 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,919 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 1,919 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 1,919 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,919 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,919 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 1,919 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: 0000950170-25-110056 · ownership.xml · nonDerivative · entry 1

Butler Ronald David II · CIK 0001554713 · CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 172,131

F1 · shares: In connection with the vesting on August 16, 2025, of 1,919 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,919 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,919 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 1,919 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 1,919 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,919 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,919 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 1,919 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: 0000950170-25-109685 · ownership.xml · derivative · entry 3

Goodrich Brian D. · CIK 0002038375 · EVP - General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,302

Underlying: Common Stock · 4,302 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: 0000950170-25-109685 · ownership.xml · nonDerivative · entry 2

Goodrich Brian D. · CIK 0002038375 · EVP - General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,528

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

SEC source: 0000950170-25-109685 · ownership.xml · nonDerivative · entry 1

Goodrich Brian D. · CIK 0002038375 · EVP - General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,639

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: 0000950170-25-109678 · ownership.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,762

Underlying: Common Stock · 5,762 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: 0000950170-25-109678 · 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: 26,192

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

SEC source: 0000950170-25-109678 · 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: 26,319

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: 0000950170-25-109675 · 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: 46,906

Underlying: Common Stock · 4,757 shares

Expires not disclosed

F3 · derivative.exercise_price: In connection with the vesting on August 14, 2025, of 4,757 restricted stock units previously granted to the reporting person, the reporting person's receipt of 4,757 shares of common stock was deferred resulting in the reporting person's receipt instead of 4,757 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 4,757 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 14, 2025, of 4,757 restricted stock units previously granted to the reporting person, the reporting person's receipt of 4,757 shares of common stock was deferred resulting in the reporting person's receipt instead of 4,757 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 4,757 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 14, 2025, of 4,757 restricted stock units previously granted to the reporting person, the reporting person's receipt of 4,757 shares of common stock was deferred resulting in the reporting person's receipt instead of 4,757 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 4,757 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 14, 2025, of 4,757 restricted stock units previously granted to the reporting person, the reporting person's receipt of 4,757 shares of common stock was deferred resulting in the reporting person's receipt instead of 4,757 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 4,757 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: 0000950170-25-109675 · 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: 521,203

F3 · shares: In connection with the vesting on August 14, 2025, of 4,757 restricted stock units previously granted to the reporting person, the reporting person's receipt of 4,757 shares of common stock was deferred resulting in the reporting person's receipt instead of 4,757 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 4,757 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 14, 2025, of 4,757 restricted stock units previously granted to the reporting person, the reporting person's receipt of 4,757 shares of common stock was deferred resulting in the reporting person's receipt instead of 4,757 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 4,757 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 · ownership.nature: Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary.

SEC source: 0000950170-25-109675 · 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: 525,960

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.

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

SEC source: 0000950170-25-109671 · ownership.xml · derivative · entry 4

Ruzicka John James Jr · CIK 0001773890 · EVP-CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,679

Underlying: Common Stock · 453 shares

Expires not disclosed

F2 · derivative.exercise_price: In connection with the vesting on August 14, 2025, of 453 restricted stock units previously granted to the reporting person, the reporting person's receipt of 453 shares of common stock was deferred resulting in the reporting person's receipt instead of 453 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 453 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 453 restricted stock units previously granted to the reporting person, the reporting person's receipt of 453 shares of common stock was deferred resulting in the reporting person's receipt instead of 453 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 453 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 453 restricted stock units previously granted to the reporting person, the reporting person's receipt of 453 shares of common stock was deferred resulting in the reporting person's receipt instead of 453 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 453 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 453 restricted stock units previously granted to the reporting person, the reporting person's receipt of 453 shares of common stock was deferred resulting in the reporting person's receipt instead of 453 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 453 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: 0000950170-25-109671 · ownership.xml · derivative · entry 3

Ruzicka John James Jr · CIK 0001773890 · EVP-CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,302

Underlying: Common Stock · 4,302 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: 0000950170-25-109671 · ownership.xml · nonDerivative · entry 2

Ruzicka John James Jr · CIK 0001773890 · EVP-CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,774

F2 · shares: In connection with the vesting on August 14, 2025, of 453 restricted stock units previously granted to the reporting person, the reporting person's receipt of 453 shares of common stock was deferred resulting in the reporting person's receipt instead of 453 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 453 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 453 restricted stock units previously granted to the reporting person, the reporting person's receipt of 453 shares of common stock was deferred resulting in the reporting person's receipt instead of 453 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 453 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: 0000950170-25-109671 · ownership.xml · nonDerivative · entry 1

Ruzicka John James Jr · CIK 0001773890 · EVP-CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,227

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: 0000950170-25-109655 · ownership.xml · derivative · entry 4

Roewe Randall Allen · CIK 0001642844 · Chief Risk Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,918

Underlying: Common Stock · 566 shares

Expires not disclosed

F2 · derivative.exercise_price: In connection with the vesting on August 14, 2025, of 566 restricted stock units previously granted to the reporting person, the reporting person's receipt of 566 shares of common stock was deferred resulting in the reporting person's receipt instead of 566 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 566 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 566 restricted stock units previously granted to the reporting person, the reporting person's receipt of 566 shares of common stock was deferred resulting in the reporting person's receipt instead of 566 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 566 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 566 restricted stock units previously granted to the reporting person, the reporting person's receipt of 566 shares of common stock was deferred resulting in the reporting person's receipt instead of 566 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 566 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 566 restricted stock units previously granted to the reporting person, the reporting person's receipt of 566 shares of common stock was deferred resulting in the reporting person's receipt instead of 566 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 566 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.