Other Events On August 24, 2026, FS Bancorp, Inc. (“Company”), the holding company for 1st Security Bank of Washington (“Bank”), announced that the Company’s Board of Directors authorized a share repurchase program of up to $5.0 million of the Company’s common stock. The repurchase program commences no sooner than the second trading day after the public announcement of this repurchase program. A copy of the news release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Other Events Effective August 19, 2026, FS Bancorp, Inc., Mountlake Terrace, Washington (“FS Bancorp”), the parent company of 1st Security Bank of Washington, completed its previously announced acquisition of Pacific West Bancorp (“Pacific West Bancorp”), the parent company of Pacific West Bank, located in Portland, Oregon. Pursuant to the Agreement and Plan of Merger dated February 25, 2026 (“the Merger Agreement”) by and between FS Bancorp and Pacific West Bancorp, Pacific West Bank was mer…

Other Events On July 21, 2026, the Company announced its Board of Directors declared a regular quarterly cash dividend on Company common stock of $0.29 per share, payable on August 21, 2026, to stockholders of record as of the close of business on August 7, 2026. ​

Results of Operations and Financial Condition ​ On July 21, 2026, FS Bancorp, Inc. (the Company), the parent corporation of 1st Security Bank of Washington, issued its earnings release for the quarter ended June 30, 2026. A copy of the press release is furnished with this Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

CEO — Joe Adams: Joe Adams retired as CEO and was succeeded by Matthew D. Mullet.

Other Events On April 21, 2026, the Company announced its Board of Directors declared a regular quarterly cash dividend on Company common stock of $0.29 per share, payable on May 21, 2026, to stockholders of record as of the close of business on May 7, 2026. ​

Results of Operations and Financial Condition ​ On April 21, 2026, FS Bancorp, Inc. (the Company), the parent corporation of 1st Security Bank of Washington, issued its earnings release for the quarter ended March 31, 2026. A copy of the press release is furnished with this Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

Other Events On February 25, 2026, FS Bancorp, Inc., (“FS Bancorp”) entered into a definitive agreement (the “Agreement”) with Pacific West Bancorp, an Oregon corporation (“Pacific West”), pursuant to which Pacific West will be merged with and into FS Bancorp (the “Merger”), and immediately thereafter Pacific West’s bank subsidiary, Pacific West Bank, will be merged with and into the FS Bancorp’s subsidiary bank, 1st Security Bank of Washington. Under terms of the Agreement, the aggregate con…

Other Events ​ As previously reported in the Original Form 8-K, filed on January 21, 2026 with the Securities and Exchange Commission (“SEC”), the Company announced that its Board of Directors declared a regular quarterly cash dividend on its common stock that is payable on February 19, 2026, to shareholders of record as of the close of business on February 5, 2026. This Amendment corrects the record date from February 5, 2026 to February 6, 2026. As corrected, the dividend is payable on Febr…

Other Events ​ On January 21, 2026, the Company announced that its Board of Directors declared a regular quarterly cash dividend on its common stock, increasing it from $0.28 per share to $0.29 per share. The dividend is payable on February 19, 2026, to stockholders of record as of the close of business on February 5, 2026. ​

Results of Operations and Financial Condition ​ On January 21, 2026, FS Bancorp, Inc. (the Company), the parent corporation of 1st Security Bank of Washington, issued its earnings release for the quarter ended December 31, 2025. A copy of the press release is furnished with this Form 8-K as Exhibit 99.1 and is incorporated herein by reference. ​

The filing describes the establishment of change of control agreements for certain officers, which is a routine corporate governance measure.

Other Events On October 27, 2025, FS Bancorp, Inc. (“Company”), the holding company for 1st Security Bank of Washington (“Bank”), announced that the Company’s Board of Directors authorized an additional share repurchase program of up to $5.0 million of the Company’s common stock. The repurchase program commences no sooner than the third trading day after the public announcement of this repurchase program. A copy of the news release is attached hereto as Exhibit 99.1 and is incorporated herein…

Other Events On October 21, 2025, the Company announced its Board of Directors declared a regular quarterly cash dividend on Company common stock of $0.28 per share, payable on November 20, 2025, to stockholders of record as of the close of business on November 6, 2025. ​

Results of Operations and Financial Condition ​ On October 21, 2025, FS Bancorp, Inc. (the Company), the parent corporation of 1st Security Bank of Washington, issued its earnings release for the quarter ended September 30, 2025. A copy of the press release is furnished with this Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

President and Chief Executive Officer — Matthew D. Mullet: Mr. Mullet was promoted to President and CEO of the Bank, succeeding Joseph C. Adams who is retiring from that position.

Results of Operations and Financial Condition ​ On July 22, 2025, FS Bancorp, Inc. (the Company), the parent corporation of 1st Security Bank of Washington, issued its earnings release for the quarter ended June 30, 2025. A copy of the press release is furnished with this Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

Other Events On July 22, 2025, the Company announced its Board of Directors declared a regular quarterly cash dividend on Company common stock of $0.28 per share and a special dividend of $0.22 per common share, both payable on August 21, 2025, to stockholders of record as of the close of business on August 7, 2025. ​

Other Events On July 9, 2025, FS Bancorp, Inc. (“Company”), the holding company for 1st Security Bank of Washington (“Bank”), announced that the Company’s Board of Directors authorized an additional share repurchase program of up to $5.0 million of the Company’s common stock. The repurchase program commences no sooner than the third trading day after the public announcement of this repurchase program. In addition, there is approximately $400,000 remaining for repurchase under the repurchase p…

Changes in Registrant’s Certifying Accountant On June 3 , 2025, FS Bancorp, Inc., (the "Company") was notified that Moss Adams LLP ("Moss Adams"), the Company's independent registered public accounting firm, merged with Baker Tilly US, LLP effective on June 3, 2025. The combined audit practices operate as Baker Tilly US, LLP (“Baker Tilly”). In connection with the notification of the merger, Moss Adams has resigned as the auditors of the Company and the Audit Committee of the Company’s Board…

Results of Operations and Financial Condition ​ On April 22, 2025, FS Bancorp, Inc. (the Company), the parent corporation of 1st Security Bank of Washington, issued its earnings release for the quarter ended March 31, 2025. A copy of the press release is furnished with this Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

Other Events On April 22, 2025, the Company announced its Board of Directors declared a regular quarterly cash dividend on Company common stock of $0.28 per share, payable on May 22, 2025, to stockholders of record as of the close of business on May 8, 2025. ​

Other Events On April 4, 2025, FS Bancorp, Inc. (“Company”), the holding company for 1st Security Bank of Washington (“Bank”), announced that the Company’s Board of Directors authorized an additional share repurchase program of up to $5.0 million of the Company’s common stock. The repurchase program commences no sooner than the third trading day after the public announcement of this repurchase program. In addition, there is approximately $900,000 remaining for repurchase under the repurchase…

Chief Financial Officer — Phillip Whittington: Phillip Whittington was promoted from Controller to Chief Financial Officer.

Other Events ​ On January 21, 2025, the Company announced that its Board of Directors declared a regular quarterly cash dividend on its common stock, increasing it from $0.27 per share to $0.28 per share. The dividend is payable on February 20, 2025, to stockholders of record as of the close of business on February 6, 2025. ​