Donn C. Costa, Chief Home Lending and Executive Vice President of FS Bancorp, Inc. (NASDAQ:FSBW), filed a Form 4 on October 27, 2026, reporting transactions dated October 26, 2026, involving the exercise of stock options and a same-day disposition of common stock.

Key Highlights

  • Option exercise: Costa acquired 36,800 shares of common stock via a stock option exercise (transaction code M) at a conversion price of $29.30 per share on October 26, 2026.
  • Shares disposed: 36,800 shares were disposed of (transaction code F) at $43.77 per share on the same date.
  • Remaining direct holdings: Following the transactions, Costa directly held 76,172 shares, plus a separate direct holding of 5,089 shares, according to the filing.
  • Indirect holdings: The filing reports 9,307 shares held indirectly through an ESOP.
  • Remaining options: Costa retains 24,810 stock options with an exercise price of $29.30, expiring August 15, 2028, per the filing.

Costa Option Exercise and Share Disposition at FS Bancorp

According to the Form 4 filed with the SEC, Donn C. Costa, serving as Chief Home Lending and Executive Vice President of FS Bancorp, Inc. (NASDAQ:FSBW), reported two transactions in the company's common stock on October 26, 2026. The filing shows Costa exercised a stock option to acquire 36,800 shares at the option's conversion price of $29.30 per share, with the underlying option originally dated August 15, 2019 and set to expire August 15, 2028.

On the same date, the filing reports that 36,800 shares were disposed of at $43.77 per share under transaction code F, which the SEC uses to indicate shares withheld for tax obligations. Following these transactions, the filing lists Costa's direct beneficial ownership at 76,172 shares in one line and 5,089 shares in a separate direct holding. An additional 9,307 shares are reported as held indirectly through an ESOP.

The filing further discloses that Costa retains 24,810 stock options with a $29.30 exercise price, expiring August 15, 2028. The price of the derivative security for the exercised options is listed as $0. The Form 4 was signed by Donn C. Costa and dated October 27, 2026.

What Was Disclosed

The filing discloses an option exercise of 36,800 shares at $29.30 and a same-day disposition of 36,800 shares at $43.77 by FS Bancorp's Chief Home Lending EVP, with post-transaction direct holdings of 76,172 shares and 5,089 shares, plus 9,307 indirect ESOP shares.