Form 4 for FFIN FIRST FINANCIAL BANKSHARES INC

Accepted 2026-08-18 13:44:14 ET · period of report 2026-08-14 · accession 0001193125-26-355145 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
DM	2026-08-18 13:44	2016-08-14+	FFIN	Hickox Michelle S	EVP, CFO	D - Sale to Iss	—	-3,691	8,170	-31%	—
DM	2026-08-18 13:44	2026-08-14+	FFIN	Hickox Michelle S	EVP, CFO	A - Grant	—	+3,691	13.7K	+37%	—

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Common Stock	2016-08-14	D	D	2,337	—	9,524	D	—	—	(F1) 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. (F1) 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.
2	Common	Common Stock	2026-08-16	D	D	1,354	—	8,170	D	—	—	(F2) 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. (F2) 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.
3	Derivative	Deferred Stock Units	2026-08-14	A	A	2,337	—	12,343	D	— · — to —	2,337 Common Stock	(F1) 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. (F1) 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. (F1) 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. (F1) 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.
4	Derivative	Deferred Stock Units	2026-08-16	A	A	1,354	—	13,697	D	— · — to —	1,354 Common Stock	(F2) 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. (F2) 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. (F2) 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. (F2) 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.