Form 4 for FFIN FIRST FINANCIAL BANKSHARES INC

Accepted 2026-08-18 13:33:10 ET · period of report 2026-08-14 · accession 0001193125-26-355113 · 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 13:33	2026-08-14+	FFIN	Ruzicka John James Jr	EVP, Chief Banking Ops Off	D - Sale to Iss	—	-1,406	10.6K	-12%	—
DM	2026-08-18 13:33	2026-08-14+	FFIN	Ruzicka John James Jr	EVP, Chief Banking Ops Off	A - Grant	—	+1,406	7,243	+24%	—

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	D	D	880	—	11,106	D	—	—	(F1) In connection with the vesting on August 14, 2026, of 880 restricted stock units previously granted to the reporting person, the reporting person's receipt of 880 shares of common stock was deferred resulting in the reporting person's receipt instead of 880 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 880 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 880 restricted stock units previously granted to the reporting person, the reporting person's receipt of 880 shares of common stock was deferred resulting in the reporting person's receipt instead of 880 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 880 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	526	—	10,580	D	—	—	(F2) 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. (F2) 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.
3	Derivative	Deferred Stock Units	2026-08-14	A	A	880	—	6,717	D	— · — to —	880 Common Stock	(F1) In connection with the vesting on August 14, 2026, of 880 restricted stock units previously granted to the reporting person, the reporting person's receipt of 880 shares of common stock was deferred resulting in the reporting person's receipt instead of 880 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 880 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 880 restricted stock units previously granted to the reporting person, the reporting person's receipt of 880 shares of common stock was deferred resulting in the reporting person's receipt instead of 880 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 880 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 880 restricted stock units previously granted to the reporting person, the reporting person's receipt of 880 shares of common stock was deferred resulting in the reporting person's receipt instead of 880 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 880 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 880 restricted stock units previously granted to the reporting person, the reporting person's receipt of 880 shares of common stock was deferred resulting in the reporting person's receipt instead of 880 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 880 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	526	—	7,243	D	— · — to —	526 Common Stock	(F2) 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. (F2) 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. (F2) 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. (F2) 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.