FFIN

SEC source: 0001209191-23-053963 · doc4.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,382

F1 · shares: The reporting person elected, in accordance with the Registrant's 2015 Restricted Stock Plan, to exercise his right to have the Registrant withhold 122 shares of the Registrant's common stock to pay income taxes related to vesting of previously granted restricted stock.

SEC source: 0001209191-23-053960 · doc4.xml · nonDerivative · entry 1

Roewe Randall Allen · CIK 0001642844 · Chief Risk Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,882

F1 · shares: The reporting person elected, in accordance with the Registrant's 2015 Restricted Stock Plan, to exercise his right to have the Registrant withhold 203 shares of the Registrant's common stock to pay income taxes related to vesting of previously granted restricted stock.

SEC source: 0001209191-23-053957 · doc4.xml · nonDerivative · entry 1

Ruzicka John James Jr · CIK 0001773890 · EVP-CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,431

F1 · shares: The reporting person elected, in accordance with the Registrant's 2015 Restricted Stock Plan, to exercise his right to have the Registrant withhold 203 shares of the Registrant's common stock to pay income taxes related to vesting of previously granted restricted stock.

SEC source: 0001209191-23-053955 · doc4.xml · nonDerivative · entry 1

Thaxton Kirk W · CIK 0001657071 · Trust Company CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 97,126

F1 · shares: The reporting person elected, in accordance with the Registrant's 2015 Restricted Stock Plan, to exercise his right to have the Registrant withhold 203 shares of the Registrant's common stock to pay income taxes related to vesting of previously granted restricted stock.

SEC source: 0001209191-23-053951 · doc4.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: 952,215

F1 · shares: The reporting person elected, in accordance with the Registrant's 2015 Restricted Stock Plan, to exercise his right to have the Registrant withhold 653 shares of the Registrant's common stock to pay income taxes related to vesting of previously granted restricted stock.

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

SEC source: 0001209191-23-053547 · doc4.xml · nonDerivative · entry 1

Anthony April Kaye Bullock · CIK 0001629441 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 93,146

SEC source: 0001209191-23-053623 · doc4.xml · nonDerivative · entry 1

Denny Michael B. · CIK 0001774246 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Limited Partnership

Disclosed balance after: 101,690

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: 0001209191-23-053622 · doc4.xml · nonDerivative · entry 1

TROTTER JOHNNY · CIK 0001251133 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 936,576

SEC source: 0001209191-23-053620 · doc4.xml · nonDerivative · entry 3

Edwards Murray Hamilton · CIK 0001356117 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 40,509

SEC source: 0001209191-23-053620 · doc4.xml · nonDerivative · entry 2

Edwards Murray Hamilton · CIK 0001356117 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 197,617

SEC source: 0001209191-23-053620 · doc4.xml · nonDerivative · entry 1

Edwards Murray Hamilton · CIK 0001356117 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 197,417

SEC source: 0001209191-23-053544 · doc4.xml · nonDerivative · entry 1

TROTTER JOHNNY · CIK 0001251133 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 935,576

SEC source: 0001209191-23-053456 · doc4.xml · derivative · entry 3

Thaxton Kirk W · CIK 0001657071 · Trust Company CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 5,000 shares

Expires 2023-10-22

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

SEC source: 0001209191-23-053456 · doc4.xml · nonDerivative · entry 1

Thaxton Kirk W · CIK 0001657071 · Trust Company CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 97,329

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

SEC source: 0001209191-23-047298 · doc4.xml · nonDerivative · entry 1

TROTTER JOHNNY · CIK 0001251133 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 932,076

SEC source: 0001209191-23-047162 · doc4.xml · nonDerivative · entry 1

Denny Michael B. · CIK 0001774246 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Limited Partnership

Disclosed balance after: 100,890

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: 0001209191-23-046859 · doc4.xml · nonDerivative · entry 1

TROTTER JOHNNY · CIK 0001251133 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 927,576

SEC source: 0001209191-23-046587 · doc4.xml · derivative · entry 6

Thaxton Kirk W · CIK 0001657071 · Trust Company CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 427

Underlying: Common Stock · 427 shares

Expires not disclosed

F3 · derivative.exercise_price: In connection with the vesting on August 16, 2023, of 427 restricted stock units previously granted to Mr. Thaxton on August 16, 2022, Mr. Thaxton's receipt of 427 shares of common stock was deferred resulting in Mr. Thaxton's receipt instead of 427 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. Thaxton is therefore reporting the disposition of 427 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Thaxton's termination of employment.

F3 · price: In connection with the vesting on August 16, 2023, of 427 restricted stock units previously granted to Mr. Thaxton on August 16, 2022, Mr. Thaxton's receipt of 427 shares of common stock was deferred resulting in Mr. Thaxton's receipt instead of 427 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. Thaxton is therefore reporting the disposition of 427 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Thaxton's termination of employment.

F3 · derivative.exercise_date: In connection with the vesting on August 16, 2023, of 427 restricted stock units previously granted to Mr. Thaxton on August 16, 2022, Mr. Thaxton's receipt of 427 shares of common stock was deferred resulting in Mr. Thaxton's receipt instead of 427 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. Thaxton is therefore reporting the disposition of 427 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Thaxton's termination of employment.

F3 · derivative.expiration_date: In connection with the vesting on August 16, 2023, of 427 restricted stock units previously granted to Mr. Thaxton on August 16, 2022, Mr. Thaxton's receipt of 427 shares of common stock was deferred resulting in Mr. Thaxton's receipt instead of 427 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. Thaxton is therefore reporting the disposition of 427 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Thaxton's termination of employment.

SEC source: 0001209191-23-046587 · doc4.xml · derivative · entry 5

Thaxton Kirk W · CIK 0001657071 · Trust Company CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,923

Underlying: Common Stock · 9,923 shares

Expires 2033-08-16

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

SEC source: 0001209191-23-046587 · doc4.xml · nonDerivative · entry 3

Thaxton Kirk W · CIK 0001657071 · Trust Company CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,329

F3 · shares: In connection with the vesting on August 16, 2023, of 427 restricted stock units previously granted to Mr. Thaxton on August 16, 2022, Mr. Thaxton's receipt of 427 shares of common stock was deferred resulting in Mr. Thaxton's receipt instead of 427 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. Thaxton is therefore reporting the disposition of 427 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Thaxton's termination of employment.

F3 · price: In connection with the vesting on August 16, 2023, of 427 restricted stock units previously granted to Mr. Thaxton on August 16, 2022, Mr. Thaxton's receipt of 427 shares of common stock was deferred resulting in Mr. Thaxton's receipt instead of 427 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. Thaxton is therefore reporting the disposition of 427 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Thaxton's termination of employment.

SEC source: 0001209191-23-046587 · doc4.xml · nonDerivative · entry 2

Thaxton Kirk W · CIK 0001657071 · Trust Company CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,756

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

SEC source: 0001209191-23-046587 · doc4.xml · nonDerivative · entry 1

Thaxton Kirk W · CIK 0001657071 · Trust Company CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 89,934

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

SEC source: 0001209191-23-046582 · doc4.xml · derivative · entry 2

Hickox Michelle S · CIK 0001573445 · EVP/CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,289

Underlying: Common Stock · 14,289 shares

Expires 2033-08-16

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

SEC source: 0001209191-23-046582 · doc4.xml · nonDerivative · entry 1

Hickox Michelle S · CIK 0001573445 · EVP/CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,763

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

SEC source: 0001209191-23-046579 · doc4.xml · derivative · entry 5

Ruzicka John James Jr · CIK 0001773890 · EVP-CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 262

Underlying: Common Stock · 262 shares

Expires not disclosed

F3 · derivative.exercise_price: In connection with the vesting on August 16, 2023, of 262 restricted stock units previously granted to Mr. Ruzicka on August 16, 2022, Mr. Ruzicka's receipt of 262 shares of common stock was deferred resulting in Mr. Ruzicka's receipt instead of 262 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 262 restricted 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.

F3 · price: In connection with the vesting on August 16, 2023, of 262 restricted stock units previously granted to Mr. Ruzicka on August 16, 2022, Mr. Ruzicka's receipt of 262 shares of common stock was deferred resulting in Mr. Ruzicka's receipt instead of 262 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 262 restricted 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.

F3 · derivative.exercise_date: In connection with the vesting on August 16, 2023, of 262 restricted stock units previously granted to Mr. Ruzicka on August 16, 2022, Mr. Ruzicka's receipt of 262 shares of common stock was deferred resulting in Mr. Ruzicka's receipt instead of 262 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 262 restricted 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.

F3 · derivative.expiration_date: In connection with the vesting on August 16, 2023, of 262 restricted stock units previously granted to Mr. Ruzicka on August 16, 2022, Mr. Ruzicka's receipt of 262 shares of common stock was deferred resulting in Mr. Ruzicka's receipt instead of 262 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 262 restricted 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: 0001209191-23-046579 · doc4.xml · derivative · entry 4

Ruzicka John James Jr · CIK 0001773890 · EVP-CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,557

Underlying: Common Stock · 5,557 shares

Expires 2033-08-16

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

SEC source: 0001209191-23-046579 · doc4.xml · nonDerivative · entry 3

Ruzicka John James Jr · CIK 0001773890 · EVP-CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,634

F3 · shares: In connection with the vesting on August 16, 2023, of 262 restricted stock units previously granted to Mr. Ruzicka on August 16, 2022, Mr. Ruzicka's receipt of 262 shares of common stock was deferred resulting in Mr. Ruzicka's receipt instead of 262 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 262 restricted 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.

F3 · price: In connection with the vesting on August 16, 2023, of 262 restricted stock units previously granted to Mr. Ruzicka on August 16, 2022, Mr. Ruzicka's receipt of 262 shares of common stock was deferred resulting in Mr. Ruzicka's receipt instead of 262 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 262 restricted 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: 0001209191-23-046579 · doc4.xml · nonDerivative · entry 2

Ruzicka John James Jr · CIK 0001773890 · EVP-CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,896

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

SEC source: 0001209191-23-046579 · doc4.xml · nonDerivative · entry 1

Ruzicka John James Jr · CIK 0001773890 · EVP-CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,316

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

SEC source: 0001209191-23-046574 · doc4.xml · derivative · entry 5

Roewe Randall Allen · CIK 0001642844 · Chief Risk Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 275

Underlying: Common Stock · 275 shares

Expires not disclosed

F3 · derivative.exercise_price: In connection with the vesting on August 16, 2023, of 275 restricted stock units previously granted to Mr. Roewe on August 16, 2022, Mr. Roewe's receipt of 275 shares of common stock was deferred resulting in Mr. Roewe's receipt instead of 275 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 275 restricted 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.

F3 · price: In connection with the vesting on August 16, 2023, of 275 restricted stock units previously granted to Mr. Roewe on August 16, 2022, Mr. Roewe's receipt of 275 shares of common stock was deferred resulting in Mr. Roewe's receipt instead of 275 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 275 restricted 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.

F3 · derivative.exercise_date: In connection with the vesting on August 16, 2023, of 275 restricted stock units previously granted to Mr. Roewe on August 16, 2022, Mr. Roewe's receipt of 275 shares of common stock was deferred resulting in Mr. Roewe's receipt instead of 275 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 275 restricted 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.

F3 · derivative.expiration_date: In connection with the vesting on August 16, 2023, of 275 restricted stock units previously granted to Mr. Roewe on August 16, 2022, Mr. Roewe's receipt of 275 shares of common stock was deferred resulting in Mr. Roewe's receipt instead of 275 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 275 restricted 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: 0001209191-23-046574 · doc4.xml · derivative · entry 4

Roewe Randall Allen · CIK 0001642844 · Chief Risk Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,954

Underlying: Common Stock · 5,954 shares

Expires 2033-08-16

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

SEC source: 0001209191-23-046574 · doc4.xml · nonDerivative · entry 3

Roewe Randall Allen · CIK 0001642844 · Chief Risk Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,085

F3 · shares: In connection with the vesting on August 16, 2023, of 275 restricted stock units previously granted to Mr. Roewe on August 16, 2022, Mr. Roewe's receipt of 275 shares of common stock was deferred resulting in Mr. Roewe's receipt instead of 275 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 275 restricted 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.

F3 · price: In connection with the vesting on August 16, 2023, of 275 restricted stock units previously granted to Mr. Roewe on August 16, 2022, Mr. Roewe's receipt of 275 shares of common stock was deferred resulting in Mr. Roewe's receipt instead of 275 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 275 restricted 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: 0001209191-23-046574 · doc4.xml · nonDerivative · entry 2

Roewe Randall Allen · CIK 0001642844 · Chief Risk Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,360

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

SEC source: 0001209191-23-046574 · doc4.xml · nonDerivative · entry 1

Roewe Randall Allen · CIK 0001642844 · Chief Risk Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,667

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

SEC source: 0001209191-23-046571 · doc4.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,160

Underlying: Common Stock · 5,160 shares

Expires 2033-08-16

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: 0001209191-23-046571 · doc4.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,504

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

SEC source: 0001209191-23-046571 · doc4.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,037

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

SEC source: 0001209191-23-046568 · doc4.xml · derivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,008

Underlying: Common Stock · 6,736 shares

Expires not disclosed

F1 · derivative.exercise_price: In connection with the vesting on August 16, 2023, of 3,271 restricted stock units previously granted to Mr. Dueser on August 16, 2021, Mr. Dueser's receipt of 3,271 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,271 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 3,271 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.

F3 · derivative.exercise_price: In connection with the vesting on August 16, 2023, of 3,465 restricted stock units previously granted to Mr. Dueser on August 16, 2022, Mr. Dueser's receipt of 3,465 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,465 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 3,465 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, 2023, of 3,271 restricted stock units previously granted to Mr. Dueser on August 16, 2021, Mr. Dueser's receipt of 3,271 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,271 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 3,271 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.

F3 · price: In connection with the vesting on August 16, 2023, of 3,465 restricted stock units previously granted to Mr. Dueser on August 16, 2022, Mr. Dueser's receipt of 3,465 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,465 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 3,465 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, 2023, of 3,271 restricted stock units previously granted to Mr. Dueser on August 16, 2021, Mr. Dueser's receipt of 3,271 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,271 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 3,271 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.

F3 · derivative.exercise_date: In connection with the vesting on August 16, 2023, of 3,465 restricted stock units previously granted to Mr. Dueser on August 16, 2022, Mr. Dueser's receipt of 3,465 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,465 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 3,465 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, 2023, of 3,271 restricted stock units previously granted to Mr. Dueser on August 16, 2021, Mr. Dueser's receipt of 3,271 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,271 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 3,271 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.

F3 · derivative.expiration_date: In connection with the vesting on August 16, 2023, of 3,465 restricted stock units previously granted to Mr. Dueser on August 16, 2022, Mr. Dueser's receipt of 3,465 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,465 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 3,465 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: 0001209191-23-046568 · doc4.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 952,868

F3 · shares: In connection with the vesting on August 16, 2023, of 3,465 restricted stock units previously granted to Mr. Dueser on August 16, 2022, Mr. Dueser's receipt of 3,465 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,465 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 3,465 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.

F3 · price: In connection with the vesting on August 16, 2023, of 3,465 restricted stock units previously granted to Mr. Dueser on August 16, 2022, Mr. Dueser's receipt of 3,465 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,465 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 3,465 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.

SEC source: 0001209191-23-046568 · doc4.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: 956,333

F1 · shares: In connection with the vesting on August 16, 2023, of 3,271 restricted stock units previously granted to Mr. Dueser on August 16, 2021, Mr. Dueser's receipt of 3,271 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,271 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 3,271 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, 2023, of 3,271 restricted stock units previously granted to Mr. Dueser on August 16, 2021, Mr. Dueser's receipt of 3,271 shares of common stock was deferred resulting in Mr. Dueser's receipt instead of 3,271 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 3,271 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.

SEC source: 0001209191-23-046550 · doc4.xml · derivative · entry 5

Butler Ronald David II · CIK 0001554713 · CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 565

Underlying: Common Stock · 565 shares

Expires not disclosed

F3 · derivative.exercise_price: In connection with the vesting on August 16, 2023, of 565 restricted stock units previously granted to Mr. Butler on August 16, 2022, Mr. Butler's receipt of 565 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 565 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 565 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.

F3 · price: In connection with the vesting on August 16, 2023, of 565 restricted stock units previously granted to Mr. Butler on August 16, 2022, Mr. Butler's receipt of 565 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 565 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 565 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.

F3 · derivative.exercise_date: In connection with the vesting on August 16, 2023, of 565 restricted stock units previously granted to Mr. Butler on August 16, 2022, Mr. Butler's receipt of 565 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 565 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 565 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.

F3 · derivative.expiration_date: In connection with the vesting on August 16, 2023, of 565 restricted stock units previously granted to Mr. Butler on August 16, 2022, Mr. Butler's receipt of 565 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 565 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 565 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: 0001209191-23-046550 · doc4.xml · derivative · entry 4

Butler Ronald David II · CIK 0001554713 · CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,289

Underlying: Common Stock · 14,289 shares

Expires 2033-08-16

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

SEC source: 0001209191-23-046550 · doc4.xml · nonDerivative · entry 3

Butler Ronald David II · CIK 0001554713 · CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 150,125

F3 · shares: In connection with the vesting on August 16, 2023, of 565 restricted stock units previously granted to Mr. Butler on August 16, 2022, Mr. Butler's receipt of 565 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 565 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 565 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.

F3 · price: In connection with the vesting on August 16, 2023, of 565 restricted stock units previously granted to Mr. Butler on August 16, 2022, Mr. Butler's receipt of 565 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 565 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 565 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: 0001209191-23-046550 · doc4.xml · nonDerivative · entry 2

Butler Ronald David II · CIK 0001554713 · CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 150,690

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

SEC source: 0001209191-23-046550 · doc4.xml · nonDerivative · entry 1

Butler Ronald David II · CIK 0001554713 · CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 146,627

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: 0001209191-23-046534 · doc4.xml · derivative · entry 5

Longhofer T. Luke · CIK 0001679051 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 363

Underlying: Common Stock · 363 shares

Expires not disclosed

F3 · derivative.exercise_price: In connection with the vesting on August 16, 2023, of 363 restricted stock units previously granted to Mr. Longhofer on August 16, 2022, Mr. Longhofer's receipt of 363 shares of common stock was deferred resulting in Mr. Longhofer's receipt instead of 363 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 363 restricted 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.

F3 · price: In connection with the vesting on August 16, 2023, of 363 restricted stock units previously granted to Mr. Longhofer on August 16, 2022, Mr. Longhofer's receipt of 363 shares of common stock was deferred resulting in Mr. Longhofer's receipt instead of 363 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 363 restricted 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.

F3 · derivative.exercise_date: In connection with the vesting on August 16, 2023, of 363 restricted stock units previously granted to Mr. Longhofer on August 16, 2022, Mr. Longhofer's receipt of 363 shares of common stock was deferred resulting in Mr. Longhofer's receipt instead of 363 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 363 restricted 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.

F3 · derivative.expiration_date: In connection with the vesting on August 16, 2023, of 363 restricted stock units previously granted to Mr. Longhofer on August 16, 2022, Mr. Longhofer's receipt of 363 shares of common stock was deferred resulting in Mr. Longhofer's receipt instead of 363 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 363 restricted 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: 0001209191-23-046534 · doc4.xml · derivative · entry 4

Longhofer T. Luke · CIK 0001679051 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,541

Underlying: Common Stock · 7,541 shares

Expires 2033-08-16

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

SEC source: 0001209191-23-046534 · doc4.xml · nonDerivative · entry 3

Longhofer T. Luke · CIK 0001679051 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,435

F3 · shares: In connection with the vesting on August 16, 2023, of 363 restricted stock units previously granted to Mr. Longhofer on August 16, 2022, Mr. Longhofer's receipt of 363 shares of common stock was deferred resulting in Mr. Longhofer's receipt instead of 363 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 363 restricted 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.

F3 · price: In connection with the vesting on August 16, 2023, of 363 restricted stock units previously granted to Mr. Longhofer on August 16, 2022, Mr. Longhofer's receipt of 363 shares of common stock was deferred resulting in Mr. Longhofer's receipt instead of 363 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 363 restricted 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: 0001209191-23-046534 · doc4.xml · nonDerivative · entry 2

Longhofer T. Luke · CIK 0001679051 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,798

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

SEC source: 0001209191-23-046534 · doc4.xml · nonDerivative · entry 1

Longhofer T. Luke · CIK 0001679051 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,654

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