8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): October 23, 2025

FS BANCORP, INC.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code:  (425) 771-5299

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. [  ]

Item 8.01  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 by reference.

Item 9.01. Financial Statements and Exhibits

(d)

  Exhibits

99.1 Press Release of FS Bancorp, Inc. dated October 27, 2025.

104 Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Exhibit 99.1

FS Bancorp, Inc. Authorizes Additional Share Repurchases

MOUNTLAKE TERRACE, WA – October 27, 2025 - FS Bancorp, Inc. (NASDAQ: FSBW) (“Company”), the holding company for 1st Security Bank of Washington (“Bank”) announced that its Board of Directors has authorized an additional repurchase of up to $5.0 million in shares of the Company’s outstanding common stock in the open market, in privately negotiated transactions from time to time over a 12-month period until October 27, 2026, at such prices as may be determined by the Company’s management. The repurchase program will commence no sooner than the third trading day after the public announcement of this repurchase program.

The repurchase program permits shares to be repurchased in open market or private transactions or pursuant to a trading plan adopted in accordance with Rule 10b5-1 of the Securities and Exchange Commission (“SEC”).

Repurchases will be made at management's discretion at prices management considers to be attractive and in the best interests of both the Company and its shareholders, subject to the availability of stock, general market conditions, the trading price of the stock, alternative uses for capital, and the Company's financial performance. Open market purchases will be conducted in accordance with the limitations set forth in Rule 10b-18 of the SEC and other applicable legal requirements.

The repurchase program may be suspended, terminated or modified at any time for any reason, including market conditions, the cost of repurchasing shares, the availability of alternative investment opportunities, liquidity, and other factors deemed appropriate. These factors may also affect the timing and amount of share repurchases. The repurchase program does not obligate the Company to purchase any particular number of shares.

About FS Bancorp

FS Bancorp, Inc., a Washington corporation, is the holding company for 1st Security Bank of Washington. The Bank offers a range of loan and deposit services primarily to small- and middle-market businesses and individuals in Washington and Oregon. It operates through 27 bank branches, one headquarters office that provides loans and deposit services, and loan production offices in various suburban communities in the greater Puget Sound area, the Kennewick-Pasco-Richland metropolitan area of Washington, also known as the Tri-Cities, and in Vancouver, Washington. Additionally, the Bank services home mortgage customers across the Northwest, focusing on markets in Washington State including the Puget Sound, Tri-Cities, and Vancouver.

For more information visit 1st Security Bank’s website at www.fsbwa.com.

Forward-Looking Statements

When used in this press release and in other documents filed with or furnished to the Securities and Exchange Commission (the “SEC”), in press releases or other public stockholder communications, or in oral statements made with the approval of an authorized executive officer, the words or phrases “believe,” “will,” “will likely result,” “are expected to,” “will continue,” “is anticipated,” “estimate,” “project,” “plans,” or similar expressions are intended to identify “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Forward‑looking statements are not historical

facts but instead represent management's current expectations and forecasts regarding future events, many of which are inherently uncertain and outside of our control. Actual results may differ, possibly materially from those currently expected or projected in these forward-looking statements. Factors that could cause the Company’s actual results to differ materially from those described in the forward-looking statements, include but are not limited to, the following: adverse impacts to economic conditions in the Company’s local market areas, other markets where the Company has lending relationships, or other aspects of the Company’s business operations or financial markets, including, without limitation, as a result of employment levels; labor shortages, the effects of inflation, recessionary pressures or slowing economic growth; changes in interest rates and the duration of such changes, including actions by the Federal Reserve, which could adversely affect our revenues and expenses, the values of our assets and obligations, and the availability and cost of capital and liquidity; the impact of inflation and monetary and fiscal policy responses thereto and their impact on consumer and business behavior; geopolitical developments and international conflicts including but not limited to tensions or instability in Eastern Europe, the Middle East, and Asia, or the imposition of new or increased tariffs and trade restrictions, which may disrupt financial markets, global supply chains, energy prices, or economic activity in specific industry sectors; the effects of a federal government shutdown, debt ceiling standoff, or other fiscal policy uncertainty; increased competitive pressures, including repricing and competitors' pricing initiatives, and their impact on our market position, loan, and deposit products; adverse changes in the securities markets, the Company’s ability to execute its plans to grow its residential construction lending, mortgage banking, and warehouse lending operations, and the geographic expansion of its indirect home improvement lending; challenges arising from expanding into new geographic markets, products, or services; secondary market conditions for loans and the Company’s ability to originate loans for sale and sell loans in the secondary market; volatility in the mortgage industry; fluctuations in deposits; liquidity issues, including our ability to borrow funds or raise additional capital, if necessary; the impact of bank failures or adverse developments at other banks and related negative press about the banking industry in general on investor and depositor sentiment; the ability to adapt to rapid technological changes, including advancements in artificial intelligence, digital banking, and cybersecurity; legislation or regulatory changes, including but not limited to shifts in capital requirements, banking regulation, tax laws, or consumer protection laws; vulnerabilities  in information systems or third-party service providers, including disruptions, breaches, or attacks; environmental, social and governance goals; the effects of climate change, severe weather events, natural disasters, pandemics, epidemics and other public health crises, acts of war or terrorism, domestic political unrest and other external events on our business; and other factors described in the Company’s latest Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, and other reports filed with or furnished to the SEC which are available on its website at www.fsbwa.com

and on the SEC's website at www.sec.gov.

Any of the forward-looking statements that the Company makes in this press release and in the other public statements are based upon management's beliefs and assumptions at the time they are made and may turn out to be incorrect because of the inaccurate assumptions the Company might make, because of the factors illustrated above or because of other factors that cannot be foreseen by the Company. Therefore, these factors should be considered in evaluating the forward‑looking statements, and undue reliance should not be placed on such statements. The Company does not undertake and specifically disclaims any obligation to revise any forward-looking statements to reflect the occurrence of anticipated or unanticipated events or circumstances after the date of such statements.