{"transactions":[{"id":684928,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Deferred Stock Units","published_at":"2026-08-18T21:10:28.000Z","date":"2026-08-16","kind":"grant","planned":false,"acquired":true,"shares":639,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"In connection with the vesting on August 16, 2026, of 639 restricted stock units previously granted to the reporting person, the reporting person's receipt of 639 shares of common stock was deferred resulting in the reporting person's receipt instead of 639 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 639 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"In connection with the vesting on August 16, 2026, of 639 restricted stock units previously granted to the reporting person, the reporting person's receipt of 639 shares of common stock was deferred resulting in the reporting person's receipt instead of 639 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 639 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"In connection with the vesting on August 16, 2026, of 639 restricted stock units previously granted to the reporting person, the reporting person's receipt of 639 shares of common stock was deferred resulting in the reporting person's receipt instead of 639 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 639 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"In connection with the vesting on August 16, 2026, of 639 restricted stock units previously granted to the reporting person, the reporting person's receipt of 639 shares of common stock was deferred resulting in the reporting person's receipt instead of 639 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 639 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."}],"balance_after":9045,"derivative":{"underlying":"Common Stock","underlying_shares":639},"source":{"system":"sec-edgar","filing":"0001193125-26-355676","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355676/ownership.xml","form_type":"4"}},{"id":684927,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Deferred Stock Units","published_at":"2026-08-18T21:10:28.000Z","date":"2026-08-14","kind":"grant","planned":false,"acquired":true,"shares":1825,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"In connection with the vesting on August 14, 2026, of 1,825 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,825 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,825 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 1,825  restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting on August 14, 2026, of 1,825 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,825 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,825 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 1,825  restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"In connection with the vesting on August 14, 2026, of 1,825 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,825 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,825 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 1,825  restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"In connection with the vesting on August 14, 2026, of 1,825 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,825 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,825 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 1,825  restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."}],"balance_after":8406,"derivative":{"underlying":"Common Stock","underlying_shares":1825},"source":{"system":"sec-edgar","filing":"0001193125-26-355676","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355676/ownership.xml","form_type":"4"}},{"id":684926,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Employee Stock Option, Right to Buy","published_at":"2026-08-18T21:10:28.000Z","date":"2026-08-14","kind":"grant","planned":false,"acquired":true,"shares":14737,"price":35.28,"value":519921.36,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The options vest 33.33% after one year from the grant date, 66.66% after the second year, and 100% after the third year."}],"balance_after":14737,"derivative":{"exercise_price":35.28,"expiration_date":"2036-08-14","underlying":"Common Stock","underlying_shares":14737},"source":{"system":"sec-edgar","filing":"0001193125-26-355676","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355676/ownership.xml","form_type":"4"}},{"id":684925,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2026-08-18T21:10:28.000Z","date":"2026-08-16","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":639,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"In connection with the vesting on August 16, 2026, of 639 restricted stock units previously granted to the reporting person, the reporting person's receipt of 639 shares of common stock was deferred resulting in the reporting person's receipt instead of 639 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 639 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"In connection with the vesting on August 16, 2026, of 639 restricted stock units previously granted to the reporting person, the reporting person's receipt of 639 shares of common stock was deferred resulting in the reporting person's receipt instead of 639 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 639 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."}],"balance_after":28845,"source":{"system":"sec-edgar","filing":"0001193125-26-355676","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355676/ownership.xml","form_type":"4"}},{"id":684924,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2026-08-18T21:10:28.000Z","date":"2026-08-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":1825,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"In connection with the vesting on August 14, 2026, of 1,825 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,825 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,825 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 1,825  restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting on August 14, 2026, of 1,825 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,825 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,825 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 1,825  restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."}],"balance_after":29484,"source":{"system":"sec-edgar","filing":"0001193125-26-355676","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355676/ownership.xml","form_type":"4"}},{"id":684923,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2026-08-18T21:10:28.000Z","date":"2026-08-14","kind":"grant","planned":false,"acquired":true,"shares":7937,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Reflects grant of restricted stock units (RSUs) which vest in three approximately equal installments on each of the three anniversaries of the grant date."}],"balance_after":31309,"source":{"system":"sec-edgar","filing":"0001193125-26-355676","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355676/ownership.xml","form_type":"4"}},{"id":789324,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Employee Stock Option, Right to Buy","published_at":"2026-05-07T20:11:15.000Z","date":"2026-05-06","kind":"exercise","planned":false,"acquired":false,"shares":2500,"price":21.18,"value":52950.0,"ownership":{"direct":true},"balance_after":5000,"derivative":{"exercise_price":21.18,"exercise_date":"2021-06-12","expiration_date":"2027-06-12","underlying":"Common Stock","underlying_shares":2500},"source":{"system":"sec-edgar","filing":"0001193125-26-211942","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526211942/ownership.xml","form_type":"4"}},{"id":789323,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2026-05-07T20:11:15.000Z","date":"2026-05-06","kind":"exercise","planned":false,"acquired":true,"shares":2500,"price":21.18,"value":52950.0,"ownership":{"direct":true},"balance_after":23372,"source":{"system":"sec-edgar","filing":"0001193125-26-211942","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526211942/ownership.xml","form_type":"4"}},{"id":840722,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO and President"}}],"security":"Deferred Stock Units","published_at":"2026-03-17T20:44:33.000Z","date":"2026-03-13","kind":"grant","planned":false,"acquired":true,"shares":2878,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2023, Mr. Bailey's receipt of 2,878 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 2,878 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Bailey is therefore reporting the disposition of 2,878 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2023, Mr. Bailey's receipt of 2,878 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 2,878 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Bailey is therefore reporting the disposition of 2,878 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2023, Mr. Bailey's receipt of 2,878 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 2,878 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Bailey is therefore reporting the disposition of 2,878 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2023, Mr. Bailey's receipt of 2,878 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 2,878 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Bailey is therefore reporting the disposition of 2,878 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment."}],"balance_after":6581,"derivative":{"underlying":"Common Stock","underlying_shares":2878},"source":{"system":"sec-edgar","filing":"0001193125-26-111024","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526111024/ownership.xml","form_type":"4"}},{"id":840721,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO and President"}}],"security":"Common Stock","published_at":"2026-03-17T20:44:33.000Z","date":"2026-03-13","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":2878,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2023, Mr. Bailey's receipt of 2,878 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 2,878 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Bailey is therefore reporting the disposition of 2,878 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2023, Mr. Bailey's receipt of 2,878 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 2,878 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Bailey is therefore reporting the disposition of 2,878 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment."}],"balance_after":20872,"source":{"system":"sec-edgar","filing":"0001193125-26-111024","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526111024/ownership.xml","form_type":"4"}},{"id":840720,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO and President"}}],"security":"Common Stock","published_at":"2026-03-17T20:44:33.000Z","date":"2026-03-13","kind":"grant","planned":false,"acquired":true,"shares":2878,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares of common stock issued upon the vesting of outstanding performance stock units that were subject to performance criteria other than the issuer's stock price."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents shares of common stock issued upon the vesting of outstanding performance stock units that were subject to performance criteria other than the issuer's stock price."}],"balance_after":23750,"source":{"system":"sec-edgar","filing":"0001193125-26-111024","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526111024/ownership.xml","form_type":"4"}},{"id":920629,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO and President"}}],"security":"Employee Stock Option, Right to 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and President"}}],"security":"Common Stock","published_at":"2026-02-04T15:50:40.000Z","date":"2026-02-03","kind":"exercise","planned":false,"acquired":true,"shares":2500,"price":21.18,"value":52950.0,"ownership":{"direct":true},"balance_after":20872,"source":{"system":"sec-edgar","filing":"0001193125-26-036932","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526036932/ownership.xml","form_type":"4"}},{"id":1012346,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Common Stock","published_at":"2025-10-29T18:46:48.000Z","date":"2025-10-29","kind":"purchase","planned":false,"acquired":true,"shares":1000,"price":31.54,"value":31540.0,"ownership":{"direct":true},"balance_after":18372,"source":{"system":"sec-edgar","filing":"0001193125-25-256128","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312525256128/ownership.xml","form_type":"4"}},{"id":1063361,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Deferred Stock Units","published_at":"2025-08-19T20:02:04.000Z","date":"2025-08-16","kind":"grant","planned":false,"acquired":true,"shares":866,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"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."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"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."}],"balance_after":3703,"derivative":{"underlying":"Common Stock","underlying_shares":866},"source":{"system":"sec-edgar","filing":"0000950170-25-110076","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017025110076/ownership.xml","form_type":"4"}},{"id":1063360,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Common Stock","published_at":"2025-08-19T20:02:04.000Z","date":"2025-08-16","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":866,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"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."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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."}],"balance_after":17372,"source":{"system":"sec-edgar","filing":"0000950170-25-110076","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017025110076/ownership.xml","form_type":"4"}},{"id":1064873,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Deferred Stock Units","published_at":"2025-08-18T19:01:42.000Z","date":"2025-08-14","kind":"grant","planned":false,"acquired":true,"shares":728,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"In connection with the vesting on August 14, 2025, of 728 restricted stock units previously granted to the reporting person, the reporting person's receipt of 728 shares of common stock was deferred resulting in the reporting person's receipt instead of 728 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 728  restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting on August 14, 2025, of 728 restricted stock units previously granted to the reporting person, the reporting person's receipt of 728 shares of common stock was deferred resulting in the reporting person's receipt instead of 728 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 728  restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"In connection with the vesting on August 14, 2025, of 728 restricted stock units previously granted to the reporting person, the reporting person's receipt of 728 shares of common stock was deferred resulting in the reporting person's receipt instead of 728 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 728  restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"In connection with the vesting on August 14, 2025, of 728 restricted stock units previously granted to the reporting person, the reporting person's receipt of 728 shares of common stock was deferred resulting in the reporting person's receipt instead of 728 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 728  restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."}],"balance_after":2837,"derivative":{"underlying":"Common Stock","underlying_shares":728},"source":{"system":"sec-edgar","filing":"0000950170-25-109651","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017025109651/ownership.xml","form_type":"4"}},{"id":1064872,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Employee Stock Option, Right to Buy","published_at":"2025-08-18T19:01:42.000Z","date":"2025-08-14","kind":"grant","planned":false,"acquired":true,"shares":11062,"price":36.43,"value":402988.66,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The options vest 33.33% after one year from the grant date, 66.66% after the second year, and 100% after the third year."}],"balance_after":11062,"derivative":{"exercise_price":36.43,"expiration_date":"2035-08-14","underlying":"Common Stock","underlying_shares":11062},"source":{"system":"sec-edgar","filing":"0000950170-25-109651","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017025109651/ownership.xml","form_type":"4"}},{"id":1064871,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Common Stock","published_at":"2025-08-18T19:01:42.000Z","date":"2025-08-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":728,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"In connection with the vesting on August 14, 2025, of 728 restricted stock units previously granted to the reporting person, the reporting person's receipt of 728 shares of common stock was deferred resulting in the reporting person's receipt instead of 728 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 728  restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting on August 14, 2025, of 728 restricted stock units previously granted to the reporting person, the reporting person's receipt of 728 shares of common stock was deferred resulting in the reporting person's receipt instead of 728 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 728  restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."}],"balance_after":18238,"source":{"system":"sec-edgar","filing":"0000950170-25-109651","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017025109651/ownership.xml","form_type":"4"}},{"id":1064870,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Common Stock","published_at":"2025-08-18T19:01:42.000Z","date":"2025-08-14","kind":"grant","planned":false,"acquired":true,"shares":3294,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Reflects grant of restricted stock units (RSUs) which vest in three approximately equal installments on each of the three anniversaries of the grant date."}],"balance_after":18966,"source":{"system":"sec-edgar","filing":"0000950170-25-109651","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017025109651/ownership.xml","form_type":"4"}},{"id":1081235,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Employee Stock Option, Right to Buy","published_at":"2025-07-28T18:45:00.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":false,"shares":2000,"price":16.95,"value":33900.0,"ownership":{"direct":true},"balance_after":0,"derivative":{"exercise_price":16.95,"exercise_date":"2021-10-27","expiration_date":"2025-10-27","underlying":"Common Stock","underlying_shares":2000},"source":{"system":"sec-edgar","filing":"0000950170-25-099073","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017025099073/ownership.xml","form_type":"4"}},{"id":1081234,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Common Stock","published_at":"2025-07-28T18:45:00.000Z","date":"2025-07-24","kind":"exercise","planned":false,"acquired":true,"shares":2000,"price":16.95,"value":33900.0,"ownership":{"direct":true},"balance_after":15672,"source":{"system":"sec-edgar","filing":"0000950170-25-099073","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017025099073/ownership.xml","form_type":"4"}},{"id":1192993,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Deferred Stock Units","published_at":"2025-03-25T20:33:28.000Z","date":"2025-03-21","kind":"grant","planned":false,"acquired":true,"shares":1017,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Bailey's receipt of 1,017 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 1,017 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Bailey is therefore reporting the disposition of 1,017 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Bailey's receipt of 1,017 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 1,017 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Bailey is therefore reporting the disposition of 1,017 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Bailey's receipt of 1,017 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 1,017 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Bailey is therefore reporting the disposition of 1,017 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Bailey's receipt of 1,017 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 1,017 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Bailey is therefore reporting the disposition of 1,017 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment."}],"balance_after":2109,"derivative":{"underlying":"Common Stock","underlying_shares":1017},"source":{"system":"sec-edgar","filing":"0000950170-25-044445","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017025044445/ownership.xml","form_type":"4"}},{"id":1192992,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Common Stock","published_at":"2025-03-25T20:33:28.000Z","date":"2025-03-21","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":1017,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Bailey's receipt of 1,017 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 1,017 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Bailey is therefore reporting the disposition of 1,017 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2022, Mr. Bailey's receipt of 1,017 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 1,017 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Bailey is therefore reporting the disposition of 1,017 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment."}],"balance_after":13672,"source":{"system":"sec-edgar","filing":"0000950170-25-044445","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017025044445/ownership.xml","form_type":"4"}},{"id":1192991,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Common Stock","published_at":"2025-03-25T20:33:28.000Z","date":"2025-03-21","kind":"grant","planned":false,"acquired":true,"shares":1017,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares of common stock issued upon the vesting of outstanding performance stock units that were subject to performance criteria other than the issuer's stock price."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents shares of common stock issued upon the vesting of outstanding performance stock units that were subject to performance criteria other than the issuer's stock price."}],"balance_after":14689,"source":{"system":"sec-edgar","filing":"0000950170-25-044445","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017025044445/ownership.xml","form_type":"4"}},{"id":1428562,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Commercial Banking"}}],"security":"Deferred Stock Units","published_at":"2024-08-20T20:41:16.000Z","date":"2024-08-16","kind":"grant","planned":false,"acquired":true,"shares":866,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"In connection with the vesting on August 16, 2024, of 866 restricted stock units previously granted to Mr. Bailey, Mr. Bailey's receipt of 866 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 866 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Bailey is therefore reporting the disposition of 866 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting on August 16, 2024, of 866 restricted stock units previously granted to Mr. Bailey, Mr. Bailey's receipt of 866 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 866 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Bailey is therefore reporting the disposition of 866 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"In connection with the vesting on August 16, 2024, of 866 restricted stock units previously granted to Mr. Bailey, Mr. Bailey's receipt of 866 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 866 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Bailey is therefore reporting the disposition of 866 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"In connection with the vesting on August 16, 2024, of 866 restricted stock units previously granted to Mr. Bailey, Mr. Bailey's receipt of 866 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 866 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Bailey is therefore reporting the disposition of 866 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment."}],"balance_after":1092,"derivative":{"underlying":"Common Stock","underlying_shares":866},"source":{"system":"sec-edgar","filing":"0000950170-24-099158","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017024099158/ownership.xml","form_type":"4"}},{"id":1428561,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Commercial Banking"}}],"security":"Common Stock","published_at":"2024-08-20T20:41:16.000Z","date":"2024-08-16","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":866,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"In connection with the vesting on August 16, 2024, of 866 restricted stock units previously granted to Mr. Bailey, Mr. Bailey's receipt of 866 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 866 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Bailey is therefore reporting the disposition of 866 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting on August 16, 2024, of 866 restricted stock units previously granted to Mr. Bailey, Mr. Bailey's receipt of 866 shares of common stock was deferred resulting in Mr. Bailey's receipt instead of 866 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Bailey is therefore reporting the disposition of 866 restricted stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Bailey's termination of employment."}],"balance_after":13672,"source":{"system":"sec-edgar","filing":"0000950170-24-099158","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000095017024099158/ownership.xml","form_type":"4"}},{"id":1428560,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22673,"kind":"person","name":"Bailey David William","position":1,"cik":"0001924083","reported_name":"Bailey David William","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Commercial Banking"}}],"security":"Common 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