Form 4 for FFIN FIRST FINANCIAL BANKSHARES INC

Accepted 2026-08-18 17:18:12 ET · period of report 2026-08-14 · accession 0001193125-26-355701 · 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
D	2026-08-18 17:18	2026-08-14	FFIN	Longhofer T. Luke	EVP - Chief Credit Off	A - Grant	$0.00	+3,061	44.0K	+7%	$0
DM	2026-08-18 17:18	2026-08-14+	FFIN	Longhofer T. Luke	EVP - Chief Credit Off	D - Sale to Iss	—	-2,233	41.8K	-5%	—
DM	2026-08-18 17:18	2026-08-14+	FFIN	Longhofer T. Luke	EVP - Chief Credit Off	A - Grant	$35.28	+7,917	10.3K	+333%	+$279.3K

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	2026-08-14	A	A	3,061	$0.00	44,031	D	—	—	(F1) Reflects grant of restricted stock units (RSUs) which vest in three approximately equal installments on each of the three anniversaries of the grant date.
2	Common	Common Stock	2026-08-14	D	D	1,519	—	42,512	D	—	—	(F2) 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. (F2) 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.
3	Common	Common Stock	2026-08-16	D	D	714	—	41,798	D	—	—	(F3) 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. (F3) 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.
4	Derivative	Employee Stock Option, Right to Buy	2026-08-14	A	A	5,684	$35.28	5,684	D	$35.28 · — to 2036-08-14	5,684 Common Stock	(F4) The options vest 33.33% after one year from the grant date, 66.66% after the second year, and 100% after the third year.
5	Derivative	Deferred Stock Units	2026-08-14	A	A	1,519	—	9,580	D	— · — to —	1,519 Common Stock	(F2) 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. (F2) 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. (F2) 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. (F2) 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.
6	Derivative	Deferred Stock Units	2026-08-16	A	A	714	—	10,294	D	— · — to —	714 Common Stock	(F3) 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. (F3) 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. (F3) 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. (F3) 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.