{"transactions":[{"id":4614946,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22674,"kind":"person","name":"Longhofer T. Luke","position":1,"cik":"0001679051","reported_name":"Longhofer T. Luke","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP - Chief Credit Officer"}}],"security":"Employee Stock Option, Right to Buy","published_at":"2026-09-10T21:07:26.000Z","date":"2026-09-08","kind":"exercise","planned":false,"acquired":false,"shares":800,"price":29.7,"value":23760.0,"ownership":{"direct":true},"balance_after":9200,"derivative":{"exercise_price":29.7,"exercise_date":"2021-06-26","expiration_date":"2029-06-26","underlying":"Common Stock","underlying_shares":800},"source":{"system":"sec-edgar","filing":"0001193125-26-388029","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1679051/000119312526388029/ownership.xml","form_type":"4"}},{"id":4614945,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22674,"kind":"person","name":"Longhofer T. Luke","position":1,"cik":"0001679051","reported_name":"Longhofer T. 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Luke","position":1,"cik":"0001679051","reported_name":"Longhofer T. Luke","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP - Chief Credit Officer"}}],"security":"Common Stock","published_at":"2026-09-10T21:07:26.000Z","date":"2026-09-09","kind":"gift","planned":false,"acquired":false,"shares":950,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"This donation was a charitable gift to a nonprofit foundation."}],"balance_after":43148,"source":{"system":"sec-edgar","filing":"0001193125-26-388029","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1679051/000119312526388029/ownership.xml","form_type":"4"}},{"id":4614943,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22674,"kind":"person","name":"Longhofer T. Luke","position":1,"cik":"0001679051","reported_name":"Longhofer T. Luke","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP - Chief Credit Officer"}}],"security":"Common Stock","published_at":"2026-09-10T21:07:26.000Z","date":"2026-09-08","kind":"exercise","planned":false,"acquired":true,"shares":800,"price":29.7,"value":23760.0,"ownership":{"direct":true},"balance_after":44098,"source":{"system":"sec-edgar","filing":"0001193125-26-388029","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1679051/000119312526388029/ownership.xml","form_type":"4"}},{"id":4614942,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22674,"kind":"person","name":"Longhofer T. Luke","position":1,"cik":"0001679051","reported_name":"Longhofer T. Luke","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP - Chief Credit Officer"}}],"security":"Common Stock","published_at":"2026-09-10T21:07:26.000Z","date":"2026-09-08","kind":"exercise","planned":false,"acquired":true,"shares":1500,"price":21.18,"value":31770.0,"ownership":{"direct":true},"balance_after":43298,"source":{"system":"sec-edgar","filing":"0001193125-26-388029","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1679051/000119312526388029/ownership.xml","form_type":"4"}},{"id":680714,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":21458,"kind":"person","name":"Denny Michael B.","position":1,"cik":"0001774246","reported_name":"Denny Michael B.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-08-20T15:09:50.000Z","date":"2026-08-18","kind":"purchase","planned":false,"acquired":true,"shares":3000,"price":34.66,"value":103980.0,"ownership":{"direct":false,"nature":"By IRA"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The reporting person executed a trade order through a broker-dealer which resulted in multiple same day, same way open market purchases, with prices ranging from $34.65 to $34.67 per share, inclusive. The reporting person has reported these purchases on an aggregate basis using the weighted average price for the transactions. The reporting person undertakes to provide to the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price."}],"balance_after":6500,"source":{"system":"sec-edgar","filing":"0001193125-26-358683","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526358683/ownership.xml","form_type":"4"}},{"id":684934,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22674,"kind":"person","name":"Longhofer T. Luke","position":1,"cik":"0001679051","reported_name":"Longhofer T. Luke","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP - Chief Credit Officer"}}],"security":"Deferred Stock Units","published_at":"2026-08-18T21:18:12.000Z","date":"2026-08-16","kind":"grant","planned":false,"acquired":true,"shares":714,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"In connection with the vesting on August 16, 2026, of 714 restricted stock units previously granted to the reporting person, the reporting person's receipt of 714 shares of common stock was deferred resulting in the reporting person's receipt instead of 714 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 714  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 714 restricted stock units previously granted to the reporting person, the reporting person's receipt of 714 shares of common stock was deferred resulting in the reporting person's receipt instead of 714 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 714  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 714 restricted stock units previously granted to the reporting person, the reporting person's receipt of 714 shares of common stock was deferred resulting in the reporting person's receipt instead of 714 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 714  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 714 restricted stock units previously granted to the reporting person, the reporting person's receipt of 714 shares of common stock was deferred resulting in the reporting person's receipt instead of 714 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 714  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":10294,"derivative":{"underlying":"Common Stock","underlying_shares":714},"source":{"system":"sec-edgar","filing":"0001193125-26-355701","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355701/ownership.xml","form_type":"4"}},{"id":684933,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22674,"kind":"person","name":"Longhofer T. Luke","position":1,"cik":"0001679051","reported_name":"Longhofer T. Luke","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP - Chief Credit Officer"}}],"security":"Deferred Stock Units","published_at":"2026-08-18T21:18:12.000Z","date":"2026-08-14","kind":"grant","planned":false,"acquired":true,"shares":1519,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"In connection with the vesting on August 14, 2026, of 1,519 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,519 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,519 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 1,519 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 1,519 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,519 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,519 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 1,519 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 1,519 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,519 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,519 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 1,519 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 1,519 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,519 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,519 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 1,519 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":9580,"derivative":{"underlying":"Common Stock","underlying_shares":1519},"source":{"system":"sec-edgar","filing":"0001193125-26-355701","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355701/ownership.xml","form_type":"4"}},{"id":684932,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22674,"kind":"person","name":"Longhofer T. Luke","position":1,"cik":"0001679051","reported_name":"Longhofer T. Luke","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP - Chief Credit Officer"}}],"security":"Employee Stock Option, Right to Buy","published_at":"2026-08-18T21:18:12.000Z","date":"2026-08-14","kind":"grant","planned":false,"acquired":true,"shares":5684,"price":35.28,"value":200531.52,"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":5684,"derivative":{"exercise_price":35.28,"expiration_date":"2036-08-14","underlying":"Common Stock","underlying_shares":5684},"source":{"system":"sec-edgar","filing":"0001193125-26-355701","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355701/ownership.xml","form_type":"4"}},{"id":684931,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22674,"kind":"person","name":"Longhofer T. Luke","position":1,"cik":"0001679051","reported_name":"Longhofer T. Luke","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP - Chief Credit Officer"}}],"security":"Common Stock","published_at":"2026-08-18T21:18:12.000Z","date":"2026-08-16","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":714,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"In connection with the vesting on August 16, 2026, of 714 restricted stock units previously granted to the reporting person, the reporting person's receipt of 714 shares of common stock was deferred resulting in the reporting person's receipt instead of 714 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 714  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 714 restricted stock units previously granted to the reporting person, the reporting person's receipt of 714 shares of common stock was deferred resulting in the reporting person's receipt instead of 714 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 714  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":41798,"source":{"system":"sec-edgar","filing":"0001193125-26-355701","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355701/ownership.xml","form_type":"4"}},{"id":684930,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22674,"kind":"person","name":"Longhofer T. Luke","position":1,"cik":"0001679051","reported_name":"Longhofer T. Luke","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP - Chief Credit Officer"}}],"security":"Common Stock","published_at":"2026-08-18T21:18:12.000Z","date":"2026-08-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":1519,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"In connection with the vesting on August 14, 2026, of 1,519 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,519 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,519 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 1,519 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 1,519 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,519 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,519 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 1,519 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":42512,"source":{"system":"sec-edgar","filing":"0001193125-26-355701","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355701/ownership.xml","form_type":"4"}},{"id":684929,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22674,"kind":"person","name":"Longhofer T. Luke","position":1,"cik":"0001679051","reported_name":"Longhofer T. Luke","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP - Chief Credit Officer"}}],"security":"Common Stock","published_at":"2026-08-18T21:18:12.000Z","date":"2026-08-14","kind":"grant","planned":false,"acquired":true,"shares":3061,"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":44031,"source":{"system":"sec-edgar","filing":"0001193125-26-355701","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355701/ownership.xml","form_type":"4"}},{"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\"). 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The reporting person is therefore reporting the disposition of 452 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 14, 2026, of 452 restricted stock units previously granted to the reporting person, the reporting person's receipt of 452 shares of common stock was deferred resulting in the reporting person's receipt instead of 452 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 452 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 14, 2026, of 452 restricted stock units previously granted to the reporting person, the reporting person's receipt of 452 shares of common stock was deferred resulting in the reporting person's receipt instead of 452 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\"). 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Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 564 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 564 restricted stock units previously granted to the reporting person, the reporting person's receipt of 564 shares of common stock was deferred resulting in the reporting person's receipt instead of 564 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 564 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 564 restricted stock units previously granted to the reporting person, the reporting person's receipt of 564 shares of common stock was deferred resulting in the reporting person's receipt instead of 564 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 564 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 564 restricted stock units previously granted to the reporting person, the reporting person's receipt of 564 shares of common stock was deferred resulting in the reporting person's receipt instead of 564 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 564 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":7960,"derivative":{"underlying":"Common Stock","underlying_shares":564},"source":{"system":"sec-edgar","filing":"0001193125-26-355596","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355596/ownership.xml","form_type":"4"}},{"id":684906,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22669,"kind":"person","name":"Roewe Randall Allen","position":1,"cik":"0001642844","reported_name":"Roewe Randall Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Chief Risk Officer"}}],"security":"Deferred Stock Units","published_at":"2026-08-18T20:38:02.000Z","date":"2026-08-14","kind":"grant","planned":false,"acquired":true,"shares":1100,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"In connection with the vesting on August 14, 2026, of 1,100 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,100 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,100 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 1,100 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 1,100 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,100 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,100 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 1,100 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 1,100 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,100 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,100 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 1,100 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 1,100 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,100 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,100 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 1,100 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":7396,"derivative":{"underlying":"Common Stock","underlying_shares":1100},"source":{"system":"sec-edgar","filing":"0001193125-26-355596","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355596/ownership.xml","form_type":"4"}},{"id":684905,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22669,"kind":"person","name":"Roewe Randall Allen","position":1,"cik":"0001642844","reported_name":"Roewe Randall Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Chief Risk Officer"}}],"security":"Employee Stock Option, Right to Buy","published_at":"2026-08-18T20:38:02.000Z","date":"2026-08-14","kind":"grant","planned":false,"acquired":true,"shares":3684,"price":35.28,"value":129971.52,"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":3684,"derivative":{"exercise_price":35.28,"expiration_date":"2036-08-14","underlying":"Common Stock","underlying_shares":3684},"source":{"system":"sec-edgar","filing":"0001193125-26-355596","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355596/ownership.xml","form_type":"4"}},{"id":684904,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22669,"kind":"person","name":"Roewe Randall Allen","position":1,"cik":"0001642844","reported_name":"Roewe Randall Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Chief Risk Officer"}}],"security":"Common Stock","published_at":"2026-08-18T20:38:02.000Z","date":"2026-08-16","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":564,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"In connection with the vesting on August 16, 2026, of 564 restricted stock units previously granted to the reporting person, the reporting person's receipt of 564 shares of common stock was deferred resulting in the reporting person's receipt instead of 564 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 564 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 564 restricted stock units previously granted to the reporting person, the reporting person's receipt of 564 shares of common stock was deferred resulting in the reporting person's receipt instead of 564 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 564 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":33635,"source":{"system":"sec-edgar","filing":"0001193125-26-355596","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355596/ownership.xml","form_type":"4"}},{"id":684903,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22669,"kind":"person","name":"Roewe Randall Allen","position":1,"cik":"0001642844","reported_name":"Roewe Randall Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Chief Risk Officer"}}],"security":"Common Stock","published_at":"2026-08-18T20:38:02.000Z","date":"2026-08-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":1100,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"In connection with the vesting on August 14, 2026, of 1,100 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,100 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,100 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 1,100 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 1,100 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,100 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,100 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 1,100 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":34199,"source":{"system":"sec-edgar","filing":"0001193125-26-355596","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355596/ownership.xml","form_type":"4"}},{"id":684902,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22669,"kind":"person","name":"Roewe Randall Allen","position":1,"cik":"0001642844","reported_name":"Roewe Randall Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Chief Risk Officer"}}],"security":"Common 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restricted stock units (RSUs) which vest in three approximately equal installments on each of the three anniversaries of the grant date."}],"balance_after":1814,"source":{"system":"sec-edgar","filing":"0001193125-26-355214","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355214/ownership.xml","form_type":"4"}},{"id":684899,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22667,"kind":"person","name":"Butler Ronald David II","position":1,"cik":"0001554713","reported_name":"Butler Ronald David II","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP/CAO"}}],"security":"Employee Stock Option, Right to 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Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 1,354 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting on August 16, 2026, of 1,354 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,354 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,354 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 1,354 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"In connection with the vesting on August 16, 2026, of 1,354 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,354 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,354 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 1,354 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"In connection with the vesting on August 16, 2026, of 1,354 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,354 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,354 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 1,354 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."}],"balance_after":17991,"derivative":{"underlying":"Common Stock","underlying_shares":1354},"source":{"system":"sec-edgar","filing":"0001193125-26-355206","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355206/ownership.xml","form_type":"4"}},{"id":684897,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22667,"kind":"person","name":"Butler Ronald David II","position":1,"cik":"0001554713","reported_name":"Butler Ronald David II","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP/CAO"}}],"security":"Deferred Stock Units","published_at":"2026-08-18T18:10:10.000Z","date":"2026-08-14","kind":"grant","planned":false,"acquired":true,"shares":2375,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In connection with the vesting on August 14, 2026, of 2,375 restricted stock units previously granted to the reporting person, the reporting person's receipt of 2,375 shares of common stock was deferred resulting in the reporting person's receipt instead of 2,375 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 2,375 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 14, 2026, of 2,375 restricted stock units previously granted to the reporting person, the reporting person's receipt of 2,375 shares of common stock was deferred resulting in the reporting person's receipt instead of 2,375 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 2,375 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 14, 2026, of 2,375 restricted stock units previously granted to the reporting person, the reporting person's receipt of 2,375 shares of common stock was deferred resulting in the reporting person's receipt instead of 2,375 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 2,375 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 14, 2026, of 2,375 restricted stock units previously granted to the reporting person, the reporting person's receipt of 2,375 shares of common stock was deferred resulting in the reporting person's receipt instead of 2,375 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 2,375 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":16637,"derivative":{"underlying":"Common Stock","underlying_shares":2375},"source":{"system":"sec-edgar","filing":"0001193125-26-355206","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355206/ownership.xml","form_type":"4"}},{"id":684896,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22667,"kind":"person","name":"Butler Ronald David II","position":1,"cik":"0001554713","reported_name":"Butler Ronald David II","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP/CAO"}}],"security":"Common Stock","published_at":"2026-08-18T18:10:10.000Z","date":"2026-08-17","kind":"exercise","planned":false,"acquired":true,"shares":5000,"price":21.18,"value":105900.0,"ownership":{"direct":true},"balance_after":157223,"source":{"system":"sec-edgar","filing":"0001193125-26-355206","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355206/ownership.xml","form_type":"4"}},{"id":684895,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22667,"kind":"person","name":"Butler Ronald David II","position":1,"cik":"0001554713","reported_name":"Butler Ronald David II","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP/CAO"}}],"security":"Common Stock","published_at":"2026-08-18T18:10:10.000Z","date":"2026-08-17","kind":"sale","planned":false,"acquired":false,"shares":15000,"price":34.95,"value":524250.0,"ownership":{"direct":true},"balance_after":152223,"source":{"system":"sec-edgar","filing":"0001193125-26-355206","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355206/ownership.xml","form_type":"4"}},{"id":684894,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22667,"kind":"person","name":"Butler Ronald David II","position":1,"cik":"0001554713","reported_name":"Butler Ronald David II","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP/CAO"}}],"security":"Common Stock","published_at":"2026-08-18T18:10:10.000Z","date":"2026-08-16","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":1354,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"In connection with the vesting on August 16, 2026, of 1,354 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,354 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,354 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 1,354 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting on August 16, 2026, of 1,354 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,354 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,354 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 1,354 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."}],"balance_after":167223,"source":{"system":"sec-edgar","filing":"0001193125-26-355206","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355206/ownership.xml","form_type":"4"}},{"id":684893,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22667,"kind":"person","name":"Butler Ronald David II","position":1,"cik":"0001554713","reported_name":"Butler Ronald David II","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP/CAO"}}],"security":"Common Stock","published_at":"2026-08-18T18:10:10.000Z","date":"2026-08-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":2375,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"In connection with the vesting on August 14, 2026, of 2,375 restricted stock units previously granted to the reporting person, the reporting person's receipt of 2,375 shares of common stock was deferred resulting in the reporting person's receipt instead of 2,375 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 2,375 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 14, 2026, of 2,375 restricted stock units previously granted to the reporting person, the reporting person's receipt of 2,375 shares of common stock was deferred resulting in the reporting person's receipt instead of 2,375 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 2,375 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":168577,"source":{"system":"sec-edgar","filing":"0001193125-26-355206","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355206/ownership.xml","form_type":"4"}},{"id":684892,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Chairman"}}],"security":"Deferred Stock Units","published_at":"2026-08-18T17:54:12.000Z","date":"2026-08-14","kind":"grant","planned":false,"acquired":true,"shares":8875,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"In connection with the vesting on August 14, 2026, of 8,875 restricted stock units previously granted to the reporting person, the reporting person's receipt of 8,875 shares of common stock was deferred resulting in the reporting person's receipt instead of 8,875 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 8,875 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 14, 2026, of 8,875 restricted stock units previously granted to the reporting person, the reporting person's receipt of 8,875 shares of common stock was deferred resulting in the reporting person's receipt instead of 8,875 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 8,875 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 14, 2026, of 8,875 restricted stock units previously granted to the reporting person, the reporting person's receipt of 8,875 shares of common stock was deferred resulting in the reporting person's receipt instead of 8,875 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 8,875 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 14, 2026, of 8,875 restricted stock units previously granted to the reporting person, the reporting person's receipt of 8,875 shares of common stock was deferred resulting in the reporting person's receipt instead of 8,875 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 8,875 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":59245,"derivative":{"underlying":"Common Stock","underlying_shares":8875},"source":{"system":"sec-edgar","filing":"0001193125-26-355175","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355175/ownership.xml","form_type":"4"}},{"id":684891,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2026-08-18T17:54:12.000Z","date":"2026-08-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":8875,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"In connection with the vesting on August 14, 2026, of 8,875 restricted stock units previously granted to the reporting person, the reporting person's receipt of 8,875 shares of common stock was deferred resulting in the reporting person's receipt instead of 8,875 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 8,875 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 14, 2026, of 8,875 restricted stock units previously granted to the reporting person, the reporting person's receipt of 8,875 shares of common stock was deferred resulting in the reporting person's receipt instead of 8,875 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 8,875 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":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":506387,"source":{"system":"sec-edgar","filing":"0001193125-26-355175","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355175/ownership.xml","form_type":"4"}},{"id":684890,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22666,"kind":"person","name":"DUESER F SCOTT","position":1,"cik":"0001243211","reported_name":"DUESER F SCOTT","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Chairman"}}],"security":"Common Stock","published_at":"2026-08-18T17:54:12.000Z","date":"2026-08-14","kind":"grant","planned":false,"acquired":true,"shares":12755,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held by several trusts of which Mr. Dueser is trustee, settlor and beneficiary."}],"balance_after":515262,"source":{"system":"sec-edgar","filing":"0001193125-26-355175","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355175/ownership.xml","form_type":"4"}},{"id":684889,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22665,"kind":"person","name":"Hickox Michelle S","position":1,"cik":"0001573445","reported_name":"Hickox Michelle S","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP/CFO"}}],"security":"Deferred Stock Units","published_at":"2026-08-18T17:44:14.000Z","date":"2026-08-16","kind":"grant","planned":false,"acquired":true,"shares":1354,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"In connection with the vesting on August 16, 2026, of 1,354 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,354 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,354 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 1,354 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting on August 16, 2026, of 1,354 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,354 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,354 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 1,354 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"In connection with the vesting on August 16, 2026, of 1,354 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,354 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,354 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 1,354 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"In connection with the vesting on August 16, 2026, of 1,354 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,354 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,354 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 1,354 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."}],"balance_after":13697,"derivative":{"underlying":"Common Stock","underlying_shares":1354},"source":{"system":"sec-edgar","filing":"0001193125-26-355145","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355145/ownership.xml","form_type":"4"}},{"id":684888,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22665,"kind":"person","name":"Hickox Michelle S","position":1,"cik":"0001573445","reported_name":"Hickox Michelle S","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP/CFO"}}],"security":"Deferred Stock Units","published_at":"2026-08-18T17:44:14.000Z","date":"2026-08-14","kind":"grant","planned":false,"acquired":true,"shares":2337,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In connection with the vesting on August 14, 2026, of 2,337 restricted stock units previously granted to the reporting person, the reporting person's receipt of 2,337 shares of common stock was deferred resulting in the reporting person's receipt instead of 2,337 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 2,337 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 14, 2026, of 2,337 restricted stock units previously granted to the reporting person, the reporting person's receipt of 2,337 shares of common stock was deferred resulting in the reporting person's receipt instead of 2,337 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 2,337 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 14, 2026, of 2,337 restricted stock units previously granted to the reporting person, the reporting person's receipt of 2,337 shares of common stock was deferred resulting in the reporting person's receipt instead of 2,337 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 2,337 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 14, 2026, of 2,337 restricted stock units previously granted to the reporting person, the reporting person's receipt of 2,337 shares of common stock was deferred resulting in the reporting person's receipt instead of 2,337 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 2,337 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":12343,"derivative":{"underlying":"Common Stock","underlying_shares":2337},"source":{"system":"sec-edgar","filing":"0001193125-26-355145","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355145/ownership.xml","form_type":"4"}},{"id":684887,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22665,"kind":"person","name":"Hickox Michelle S","position":1,"cik":"0001573445","reported_name":"Hickox Michelle S","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP/CFO"}}],"security":"Common Stock","published_at":"2026-08-18T17:44:14.000Z","date":"2026-08-16","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":1354,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"In connection with the vesting on August 16, 2026, of 1,354 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,354 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,354 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 1,354 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting on August 16, 2026, of 1,354 restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,354 shares of common stock was deferred resulting in the reporting person's receipt instead of 1,354 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effected July 26, 2022 (the \"SERP\"). The reporting person is therefore reporting the disposition of 1,354 restricted stock units in exchange for an equal number of deferred stock units under the SERP, which are payable upon the reporting person's termination."}],"balance_after":8170,"source":{"system":"sec-edgar","filing":"0001193125-26-355145","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355145/ownership.xml","form_type":"4"}},{"id":684886,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22665,"kind":"person","name":"Hickox Michelle S","position":1,"cik":"0001573445","reported_name":"Hickox Michelle S","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP/CFO"}}],"security":"Common Stock","published_at":"2026-08-18T17:44:14.000Z","date":"2016-08-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":2337,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"In connection with the vesting on August 14, 2026, of 2,337 restricted stock units previously granted to the reporting person, the reporting person's receipt of 2,337 shares of common stock was deferred resulting in the reporting person's receipt instead of 2,337 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 2,337 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 14, 2026, of 2,337 restricted stock units previously granted to the reporting person, the reporting person's receipt of 2,337 shares of common stock was deferred resulting in the reporting person's receipt instead of 2,337 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 2,337 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":9524,"source":{"system":"sec-edgar","filing":"0001193125-26-355145","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526355145/ownership.xml","form_type":"4"}},{"id":684885,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22664,"kind":"person","name":"Ruzicka John James Jr","position":1,"cik":"0001773890","reported_name":"Ruzicka John James Jr","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Chief Banking Ops Officer"}}],"security":"Deferred Stock Units","published_at":"2026-08-18T17:33:10.000Z","date":"2026-08-16","kind":"grant","planned":false,"acquired":true,"shares":526,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"In connection with the vesting on August 16, 2026, of 526 restricted stock units previously granted to the reporting person, the reporting person's receipt of 526 shares of common stock was deferred resulting in the reporting person's receipt instead of 526 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 526 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 16, 2026, of 526 restricted stock units previously granted to the reporting person, the reporting person's receipt of 526 shares of common stock was deferred resulting in the reporting person's receipt instead of 526 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 526 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 16, 2026, of 526 restricted stock units previously granted to the reporting person, the reporting person's receipt of 526 shares of common stock was deferred resulting in the reporting person's receipt instead of 526 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 526 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 16, 2026, of 526 restricted stock units previously granted to the reporting person, the reporting person's receipt of 526 shares of common stock was deferred resulting in the reporting person's receipt instead of 526 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\"). 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Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mr. Ruzicka is therefore reporting the disposition of 2,370 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Ruzicka's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2023, Mr. Ruzicka's receipt of 2,370 shares of common stock was deferred resulting in Mr. Ruzicka's receipt instead of 2,370 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 2,370 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Ruzicka's termination of employment."},{"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. Ruzicka's receipt of 2,370 shares of common stock was deferred resulting in Mr. Ruzicka's receipt instead of 2,370 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 2,370 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Ruzicka's termination of employment."},{"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. Ruzicka's receipt of 2,370 shares of common stock was deferred resulting in Mr. Ruzicka's receipt instead of 2,370 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 2,370 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Ruzicka's termination of employment."}],"balance_after":5837,"derivative":{"underlying":"Common Stock","underlying_shares":2370},"source":{"system":"sec-edgar","filing":"0001193125-26-111195","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526111195/ownership.xml","form_type":"4"}},{"id":840733,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22664,"kind":"person","name":"Ruzicka John James Jr","position":1,"cik":"0001773890","reported_name":"Ruzicka John James Jr","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Chief Banking Ops Officer"}}],"security":"Common Stock","published_at":"2026-03-17T21:12:53.000Z","date":"2026-03-13","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":2370,"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. Ruzicka's receipt of 2,370 shares of common stock was deferred resulting in Mr. Ruzicka's receipt instead of 2,370 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 2,370 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Ruzicka's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2023, Mr. Ruzicka's receipt of 2,370 shares of common stock was deferred resulting in Mr. Ruzicka's receipt instead of 2,370 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 2,370 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Ruzicka's termination of employment."}],"balance_after":11986,"source":{"system":"sec-edgar","filing":"0001193125-26-111195","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526111195/ownership.xml","form_type":"4"}},{"id":840732,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22664,"kind":"person","name":"Ruzicka John James Jr","position":1,"cik":"0001773890","reported_name":"Ruzicka John James Jr","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Chief Banking Ops Officer"}}],"security":"Common Stock","published_at":"2026-03-17T21:12:53.000Z","date":"2026-03-13","kind":"grant","planned":false,"acquired":true,"shares":2370,"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":14356,"source":{"system":"sec-edgar","filing":"0001193125-26-111195","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526111195/ownership.xml","form_type":"4"}},{"id":840737,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22669,"kind":"person","name":"Roewe Randall Allen","position":1,"cik":"0001642844","reported_name":"Roewe Randall Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Risk Officer"}}],"security":"Deferred Stock Units","published_at":"2026-03-17T21:03:19.000Z","date":"2026-03-13","kind":"grant","planned":false,"acquired":true,"shares":2539,"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. Roewe's receipt of 2,539 shares of common stock was deferred resulting in Mr. Roewe's receipt instead of 2,539 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 2,539 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Roewe's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2023, Mr. Roewe's receipt of 2,539 shares of common stock was deferred resulting in Mr. Roewe's receipt instead of 2,539 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 2,539 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Roewe's termination of employment."},{"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. Roewe's receipt of 2,539 shares of common stock was deferred resulting in Mr. Roewe's receipt instead of 2,539 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 2,539 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Roewe's termination of employment."},{"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. Roewe's receipt of 2,539 shares of common stock was deferred resulting in Mr. Roewe's receipt instead of 2,539 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 2,539 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Roewe's termination of employment."}],"balance_after":6296,"derivative":{"underlying":"Common Stock","underlying_shares":2539},"source":{"system":"sec-edgar","filing":"0001193125-26-111136","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526111136/ownership.xml","form_type":"4"}},{"id":840736,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22669,"kind":"person","name":"Roewe Randall Allen","position":1,"cik":"0001642844","reported_name":"Roewe Randall Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Risk Officer"}}],"security":"Common Stock","published_at":"2026-03-17T21:03:19.000Z","date":"2026-03-13","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":2539,"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. Roewe's receipt of 2,539 shares of common stock was deferred resulting in Mr. Roewe's receipt instead of 2,539 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 2,539 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Roewe's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2023, Mr. Roewe's receipt of 2,539 shares of common stock was deferred resulting in Mr. Roewe's receipt instead of 2,539 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 2,539 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Roewe's termination of employment."}],"balance_after":33315,"source":{"system":"sec-edgar","filing":"0001193125-26-111136","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526111136/ownership.xml","form_type":"4"}},{"id":840735,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22669,"kind":"person","name":"Roewe Randall Allen","position":1,"cik":"0001642844","reported_name":"Roewe Randall Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Risk Officer"}}],"security":"Common Stock","published_at":"2026-03-17T21:03:19.000Z","date":"2026-03-13","kind":"grant","planned":false,"acquired":true,"shares":2539,"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":35854,"source":{"system":"sec-edgar","filing":"0001193125-26-111136","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526111136/ownership.xml","form_type":"4"}},{"id":840731,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22674,"kind":"person","name":"Longhofer T. 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Mr. Longhofer is therefore reporting the disposition of 3,216 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Longhofer's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2023, Mr. Longhofer's receipt of 3,216 shares of common stock was deferred resulting in Mr. Longhofer's receipt instead of 3,216 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 3,216 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Longhofer's termination of employment."},{"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. Longhofer's receipt of 3,216 shares of common stock was deferred resulting in Mr. Longhofer's receipt instead of 3,216 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 3,216 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Longhofer's termination of employment."},{"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. Longhofer's receipt of 3,216 shares of common stock was deferred resulting in Mr. Longhofer's receipt instead of 3,216 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 3,216 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Longhofer's termination of employment."}],"balance_after":8061,"derivative":{"underlying":"Common Stock","underlying_shares":3216},"source":{"system":"sec-edgar","filing":"0001193125-26-111102","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526111102/ownership.xml","form_type":"4"}},{"id":840730,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22674,"kind":"person","name":"Longhofer T. Luke","position":1,"cik":"0001679051","reported_name":"Longhofer T. 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Mr. Longhofer is therefore reporting the disposition of 3,216 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Longhofer's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2023, Mr. Longhofer's receipt of 3,216 shares of common stock was deferred resulting in Mr. Longhofer's receipt instead of 3,216 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 3,216 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Longhofer's termination of employment."}],"balance_after":40970,"source":{"system":"sec-edgar","filing":"0001193125-26-111102","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526111102/ownership.xml","form_type":"4"}},{"id":840729,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22674,"kind":"person","name":"Longhofer T. Luke","position":1,"cik":"0001679051","reported_name":"Longhofer T. Luke","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP - Chief Credit Officer"}}],"security":"Common Stock","published_at":"2026-03-17T20:59:31.000Z","date":"2026-03-13","kind":"grant","planned":false,"acquired":true,"shares":3216,"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":44186,"source":{"system":"sec-edgar","filing":"0001193125-26-111102","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526111102/ownership.xml","form_type":"4"}},{"id":840728,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22667,"kind":"person","name":"Butler Ronald David II","position":1,"cik":"0001554713","reported_name":"Butler Ronald David II","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CAO"}}],"security":"Deferred Stock Units","published_at":"2026-03-17T20:54:36.000Z","date":"2026-03-13","kind":"grant","planned":false,"acquired":true,"shares":6094,"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. Butler's receipt of 6,094 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 6,094 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 6,094 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Butler's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2023, Mr. Butler's receipt of 6,094 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 6,094 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 6,094 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Butler's termination of employment."},{"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. Butler's receipt of 6,094 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 6,094 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 6,094 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Butler's termination of employment."},{"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. Butler's receipt of 6,094 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 6,094 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 6,094 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Butler's termination of employment."}],"balance_after":14262,"derivative":{"underlying":"Common Stock","underlying_shares":6094},"source":{"system":"sec-edgar","filing":"0001193125-26-111084","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526111084/ownership.xml","form_type":"4"}},{"id":840727,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22667,"kind":"person","name":"Butler Ronald David II","position":1,"cik":"0001554713","reported_name":"Butler Ronald David II","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CAO"}}],"security":"Common Stock","published_at":"2026-03-17T20:54:36.000Z","date":"2026-03-13","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":6094,"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. Butler's receipt of 6,094 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 6,094 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 6,094 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Butler's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2023, Mr. Butler's receipt of 6,094 shares of common stock was deferred resulting in Mr. Butler's receipt instead of 6,094 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 6,094 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mr. Butler's termination of employment."}],"balance_after":170952,"source":{"system":"sec-edgar","filing":"0001193125-26-111084","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526111084/ownership.xml","form_type":"4"}},{"id":840726,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22667,"kind":"person","name":"Butler Ronald David II","position":1,"cik":"0001554713","reported_name":"Butler Ronald David II","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CAO"}}],"security":"Common Stock","published_at":"2026-03-17T20:54:36.000Z","date":"2026-03-13","kind":"grant","planned":false,"acquired":true,"shares":6094,"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":177046,"source":{"system":"sec-edgar","filing":"0001193125-26-111084","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526111084/ownership.xml","form_type":"4"}},{"id":840725,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22665,"kind":"person","name":"Hickox Michelle S","position":1,"cik":"0001573445","reported_name":"Hickox Michelle S","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP/CFO"}}],"security":"Deferred Stock Units","published_at":"2026-03-17T20:50:29.000Z","date":"2026-03-13","kind":"grant","planned":false,"acquired":true,"shares":6094,"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, Mrs. Hickox's receipt of 6,094 shares of common stock was deferred resulting in Mrs. Hickox's receipt instead of 6,094 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mrs. Hickox is therefore reporting the disposition of 6,094 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mrs. Hickox's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2023, Mrs. Hickox's receipt of 6,094 shares of common stock was deferred resulting in Mrs. Hickox's receipt instead of 6,094 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mrs. Hickox is therefore reporting the disposition of 6,094 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mrs. Hickox's termination of employment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2023, Mrs. Hickox's receipt of 6,094 shares of common stock was deferred resulting in Mrs. Hickox's receipt instead of 6,094 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mrs. Hickox is therefore reporting the disposition of 6,094 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mrs. Hickox's termination of employment."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2023, Mrs. Hickox's receipt of 6,094 shares of common stock was deferred resulting in Mrs. Hickox's receipt instead of 6,094 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mrs. Hickox is therefore reporting the disposition of 6,094 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mrs. Hickox's termination of employment."}],"balance_after":10006,"derivative":{"underlying":"Common Stock","underlying_shares":6094},"source":{"system":"sec-edgar","filing":"0001193125-26-111057","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526111057/ownership.xml","form_type":"4"}},{"id":840724,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22665,"kind":"person","name":"Hickox Michelle S","position":1,"cik":"0001573445","reported_name":"Hickox Michelle S","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP/CFO"}}],"security":"Common Stock","published_at":"2026-03-17T20:50:29.000Z","date":"2026-03-13","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":6094,"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, Mrs. Hickox's receipt of 6,094 shares of common stock was deferred resulting in Mrs. Hickox's receipt instead of 6,094 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mrs. Hickox is therefore reporting the disposition of 6,094 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mrs. Hickox's termination of employment."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the vesting of performance stock units previously granted on August 16, 2023, Mrs. Hickox's receipt of 6,094 shares of common stock was deferred resulting in Mrs. Hickox's receipt instead of 6,094 shares of deferred stock units into the First Financial Bankshares, Inc. Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022 (the \"SERP\"). Mrs. Hickox is therefore reporting the disposition of 6,094 performance stock units in exchange for an equal number of shares of deferred stock units under the SERP, which are payable upon Mrs. Hickox's termination of employment."}],"balance_after":11861,"source":{"system":"sec-edgar","filing":"0001193125-26-111057","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526111057/ownership.xml","form_type":"4"}},{"id":840723,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":22665,"kind":"person","name":"Hickox Michelle S","position":1,"cik":"0001573445","reported_name":"Hickox Michelle S","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP/CFO"}}],"security":"Common Stock","published_at":"2026-03-17T20:50:29.000Z","date":"2026-03-13","kind":"grant","planned":false,"acquired":true,"shares":6094,"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":17955,"source":{"system":"sec-edgar","filing":"0001193125-26-111057","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526111057/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":843321,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":38463,"kind":"person","name":"Edwards Murray Hamilton","position":1,"cik":"0001356117","reported_name":"Edwards Murray Hamilton","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-03-16T20:04:26.000Z","date":"2026-03-13","kind":"purchase","planned":false,"acquired":true,"shares":1000,"price":29.32,"value":29320.0,"ownership":{"direct":false,"nature":"By Trust"},"balance_after":43634,"source":{"system":"sec-edgar","filing":"0001193125-26-108315","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526108315/ownership.xml","form_type":"4"}},{"id":845147,"issuer":{"id":3952,"kind":"organization","name":"FIRST FINANCIAL BANKSHARES INC","symbol":"FFIN"},"owners":[{"id":50784,"kind":"person","name":"Haney Geoff","position":1,"cik":"0002069144","reported_name":"Haney Geoff","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-03-13T16:11:47.000Z","date":"2026-03-12","kind":"purchase","planned":false,"acquired":true,"shares":1500,"price":29.18,"value":43770.0,"ownership":{"direct":true},"balance_after":33646,"source":{"system":"sec-edgar","filing":"0001193125-26-105550","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/36029/000119312526105550/ownership.xml","form_type":"4"}}],"next_cursor":"2026-03-13T16:11:47.000000Z,845147"}