Ronald David Butler II, Executive Vice President and Chief Accounting Officer of First Financial Bankshares Inc (NASDAQ:FFIN), filed a Form 4 on August 18, 2026, disclosing four transactions in common stock and related derivative securities between August 14 and August 17, 2026.

Key Highlights

  • RSU-to-SERP deferral (Aug. 14): 2,375 restricted stock units vested and were converted into 2,375 deferred stock units under the First Financial Bankshares Supplemental Executive Retirement Plan.
  • RSU-to-SERP deferral (Aug. 16): 1,354 restricted stock units vested and were converted into 1,354 deferred stock units under the same SERP.
  • Open-market sale (Aug. 17): 15,000 shares of common stock were sold at $34.95 per share, transaction code S.
  • Option exercise (Aug. 17): 5,000 shares were acquired via exercise of an employee stock option at $21.18 per share, transaction code M.
  • Resulting direct ownership: 157,223 shares of common stock held directly following all reported transactions.
  • SERP units outstanding: 17,991 deferred stock units held directly following the two deferral transactions.

Transaction Details for First Financial Bankshares EVP/CAO Ronald Butler

First Financial Bankshares Inc, a Texas-based bank holding company traded on NASDAQ under the ticker FFIN, had four ownership changes reported for Butler between August 14 and August 17, 2026. On August 14, 2026, according to the filing, 2,375 restricted stock units vested. Rather than receiving shares of common stock directly, Butler deferred receipt, converting those units into 2,375 deferred stock units credited to the First Financial Bankshares Supplemental Executive Retirement Plan, as amended and restated effective July 26, 2022. The filing notes these SERP units "are payable upon the reporting person's termination."

A second RSU vesting occurred on August 16, 2026, when 1,354 restricted stock units were similarly deferred into 1,354 deferred stock units under the same SERP, bringing the total deferred stock units held directly to 17,991. The filing describes both transactions as dispositions of restricted stock units in exchange for an equal number of deferred stock units, not as sales of common stock.

On August 17, 2026, the filing discloses two separate transactions. Butler sold 15,000 shares of common stock at $34.95 per share (transaction code S), reducing direct common stock holdings. Separately on the same date, Butler exercised an employee stock option to acquire 5,000 shares of common stock at the exercise price of $21.18 per share (transaction code M). The option, which carries an expiration date of June 12, 2027, had a date exercisable of June 12, 2020, according to Table II of the filing. Following all four transactions, Butler's direct beneficial ownership of common stock stood at 157,223 shares, with 15,000 employee stock options remaining directly held.

What Was Disclosed

The filing reported four transactions: two RSU-to-SERP deferrals totaling 3,729 units on August 14 and 16, 2026, one sale of 15,000 common shares at $34.95 on August 17, and one option exercise for 5,000 shares at $21.18 on August 17, 2026.