Form 8-K

8-K — FS Bancorp, Inc.

Accession: 0000939057-26-000122

Filed: 2026-06-01

Period: 2026-06-01

CIK: 0001530249

SIC: 6036 (SAVINGS INSTITUTIONS, NOT FEDERALLY CHARTERED)

Item: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Item: Financial Statements and Exhibits

Documents

8-K — 8k6126.htm (Primary)

EX-99.1 (ex9916126.htm)

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8-K

8-K (Primary)

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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): June 1, 2026

FS BANCORP, INC.

(Exact name of registrant as specified in its charter)

Washington

001-35589

45-4585178

(State or other jurisdiction

of incorporation)

(Commission

File Number)

(I.R.S. Employer

Identification No.)

6920 220th Street SW

Mountlake Terrace, Washington

98043

(Address of principal executive offices)

(Zip Code)

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

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the

following provisions.

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each class

Trading Symbol(s)

Name of each exchange on which registered

Common Stock, par value $.01 per share

FSBW

The NASDAQ Stock Market LLC

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 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of

Certain Officers.

On June 1, 2026, FS Bancorp, Inc. (“Company”) (NASDAQ: FSBW), the holding company for 1st Security Bank of Washington (“1st Security Bank” or “Bank”) announced

that it has named Matthew D. Mullet as Chief Executive Officer of the Company effective June 1, 2026. This appointment is part of the CEO succession plan that was previously announced on

August 15, 2025. Matt Mullet has served as President and CEO of 1st Security Bank and as President of the Company and will also continue in those roles.

Joe Adams, who retired as CEO of the Company on May 31, 2026, will continue to serve as a director of the Company and the Bank.

For further information reference is made to the press release dated June 1, 2026, which is attached hereto as Exhibit 99.1 and incorporated herein by

reference.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

Exhibit No.

Description

99.1

Press Release of FS Bancorp, Inc. dated June 1, 2026.

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.

Date: June 1, 2026

FS BANCORP, INC.

/s/Erin Burr

Erin Burr

Chief Risk Officer and CRA Officer, EVP

EX-99.1

Filename: ex9916126.htm · Sequence: 2

Exhibit 99.1

FS Bancorp, Inc. Names Matt Mullet CEO

Mountlake Terrace, WA, June 1, 2026 – FS Bancorp, Inc.

(the “Company”) (NASDAQ: FSBW), the holding company for 1st Security Bank of Washington (“1st Security Bank” or “Bank”) announced today that it has named Matthew D. Mullet

CEO of the Company, effective June 1, 2026. This appointment is part of the CEO succession plan that was previously announced on August 15, 2025. Matt Mullet has served as President and CEO of 1st Security Bank and as President of the Company and

will continue in those roles.

Joe Adams, who retired as CEO of the Company on May 31, 2026, will continue to serve as a director of the Company and the Bank. Under his leadership, there

was an emphasis on reinforcing the Bank’s people first culture and developing the Company’s vision and purpose statements.

Matt Mullet served the bank as its Chief Financial Officer since 2011 before his current role. His experience and dedication to the Company’s customers and

employees will continue in his new role.

Mr. Mullet said, “I am honored by this opportunity to support our teams across the organization, continue with our financial success, and contribute to the

Company’s Vision to Build a Truly Great Place to Work and Bank.”

About 1st Security Bank of Washington

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 28 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.

Note Regarding Forward Looking Statements

This press release includes forward-looking statements within the meaning of the Private Securities Litigation Reform

Act of 1995, which can be identified by words such as "may," "expected," "anticipate", "continue," or other comparable words. In addition, all statements other than statements of historical facts that address activities that 1st Security expects or

anticipates will or may occur in the future are forward-looking statements. Readers are encouraged to read the Securities and Exchange Commission reports of FS Bancorp, particularly its Annual Report on Form 10-K for the fiscal year ended December

31, 2025, for meaningful cautionary language discussing why actual results may vary materially from those anticipated by management.

Contacts:

Matthew D. Mullet

President & CEO

(425) 771-5299

www.FSBWA.com

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