Form 8-K

8-K — FS Bancorp, Inc.

Accession: 0000939057-26-000205

Filed: 2026-08-21

Period: 2026-08-19

CIK: 0001530249

SIC: 6036 (SAVINGS INSTITUTIONS, NOT FEDERALLY CHARTERED)

Item: Other Events

Item: Financial Statements and Exhibits

Documents

8-K — 8k82026.htm (Primary)

EX-99.1 (ex99182026.htm)

GRAPHIC (image0.jpg)

XML — IDEA: XBRL DOCUMENT (R1.htm)

8-K

8-K (Primary)

Filename: 8k82026.htm · Sequence: 1

false000153024900015302492026-08-192026-08-19

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): August 19, 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 8.01. 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 merged with and into FS Bancorp, with 1st Security Bank of Washington surviving the merger (the “Merger”), and Pacific West Bank was merged with and

into 1st Security Bank of Washington, with 1st Security Bank of Washignton surviving the merger. In connection with the transaction the aggregate consideration consisted of 430,176 shares of FS Bancorp common stock and $16,832,742 in cash. Pacific

West shareholders had the right to elect shares of FS Bancorp common stock or cash, subject to proration as provided in the merger agreement. Reference is made to the Merger Agreement, which was included as Exhibit 2.1 to the Registration Statement

on Form S-4 filed by FS Bancorp with the Securities and Exchange Commission on June 29, 2026, which is incorporated herein by reference.

On August 20, 2026, FS Bancorp issued the press release attached hereto as Exhibit 99.1 and incorporated herein by reference announcing

the completion of its acquisition of Pacific West Bancorp.

Item 9.01 Financial Statements and Exhibits

(d) Exhibits

99.1 Press Release of FS Bancorp, Inc. dated August 20, 2026.

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.

FS BANCORP, INC.

Date: August 20, 2026

/s/ Matthew D. Mullet

Matthew D. Mullet

President and Chief Executive Officer

EX-99.1

Filename: ex99182026.htm · Sequence: 2

Exhibit 99.1

FS Bancorp, Inc. Announces Completion of Acquisition of Pacific West Bancorp

Mountlake Terrace, Washington August 20, 2026-- (NASDAQ

: FSBW) FS Bancorp, Inc. (“FS Bancorp”), the parent company of 1st Security Bank of Washington, announced that effective August 19, 2026, it completed its previously announced acquisition of Pacific West Bancorp (“Pacific West”), an

Oregon corporation and the merger of Pacific West Bank, the bank subsidiary of Pacific West, into 1st Security Bank of Washington.

Matthew D. Mullet, President and Chief Executive Officer of FS Bancorp and 1st Security Bank of Washington, stated, “We are excited to welcome Pacific West

Bank's customers, employees, and communities to the 1st Security Bank family. Both organizations share a commitment to relationship banking, providing exceptional customer service, and supporting the local businesses and communities we serve. This

allows us to expand our presence in Oregon while remaining focused on the values that have guided our success for more than 100 years. Our Vision Statement remains constant: To Build a Truly Great Place to Work and Bank."

Ed Kawasaki, Chairman of the Boards of Pacific West Bancorp and Pacific West Bank, stated, “On behalf of our Board and Banking Team, we wanted to extend our

heartfelt thanks and appreciation to our customers and community for their support of our Bank, and furthermore, our confidence that the partnership with 1st Security Bank will continue serving you with the same values and conviction you’ve

experienced over the past 20 years.”

In connection with the transaction the aggregate consideration consisted of 430,176 shares of FS Bancorp common stock and $16,832,742 in cash. Pacific West

shareholders had the right to elect shares of FS Bancorp common stock or cash, subject to proration as provided in the merger agreement.

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 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 the greater Portland, Oregon market. 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 news 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 FS Bancorp 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, Inc., particularly the Form S-4 and its Form 10-K for the year ended December 31, 2025, for meaningful cautionary language discussing why actual results may vary materially from those anticipated by

management. Specific risks in this press release include among other things: the expected cost savings, synergies and other financial benefits from the merger with Pacific West might not be realized within the expected time frames or at all, and

costs or difficulties relating to integration matters might be greater than expected.

Contacts:

Matthew D. Mullet,

President and Chief Executive Officer

Phillip D. Whittington,

Chief Financial Officer

(425) 771-5299

www.FSBWA.com

GRAPHIC

Filename: image0.jpg · Sequence: 6

Binary file (10641 bytes)

Download image0.jpg

XML — IDEA: XBRL DOCUMENT

XML

Filename: R1.htm · Sequence: 8

v3.26.1

Document and Entity Information

Aug. 19, 2026

Cover [Abstract]

Document Type

8-K

Amendment Flag

false

Document Period End Date

Aug. 19, 2026

Entity File Number

001-35589

Entity Registrant Name

FS BANCORP, INC.

Entity Central Index Key

0001530249

Entity Incorporation, State or Country Code

Entity Tax Identification Number

45-4585178

Entity Address, Address Line One

6920 220th Street SW

Entity Address, City or Town

Mountlake Terrace

Entity Address, State or Province

Entity Address, Postal Zip Code

98043

City Area Code

425

Local Phone Number

771-5299

Title of 12(b) Security

Common Stock, par value $.01 per share

Trading Symbol

FSBW

Security Exchange Name

NASDAQ

Entity Emerging Growth Company

false

Written Communications

false

Soliciting Material

false

Pre-commencement Tender Offer

false

Pre-commencement Issuer Tender Offer

false

- Definition

Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.

+ References

No definition available.

+ Details

Name:

dei_AmendmentFlag

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Area code of city

+ References

No definition available.

+ Details

Name:

dei_CityAreaCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Cover page.

+ References

No definition available.

+ Details

Name:

dei_CoverAbstract

Namespace Prefix:

dei_

Data Type:

xbrli:stringItemType

Balance Type:

Period Type:

duration

- Definition

For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

+ References

No definition available.

+ Details

Name:

dei_DocumentPeriodEndDate

Namespace Prefix:

dei_

Data Type:

xbrli:dateItemType

Balance Type:

Period Type:

duration

- Definition

The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.

+ References

No definition available.

+ Details

Name:

dei_DocumentType

Namespace Prefix:

dei_

Data Type:

dei:submissionTypeItemType

Balance Type:

Period Type:

duration

- Definition

Address Line 1 such as Attn, Building Name, Street Name

+ References

No definition available.

+ Details

Name:

dei_EntityAddressAddressLine1

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Name of the City or Town

+ References

No definition available.

+ Details

Name:

dei_EntityAddressCityOrTown

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Code for the postal or zip code

+ References

No definition available.

+ Details

Name:

dei_EntityAddressPostalZipCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Name of the state or province.

+ References

No definition available.

+ Details

Name:

dei_EntityAddressStateOrProvince

Namespace Prefix:

dei_

Data Type:

dei:stateOrProvinceItemType

Balance Type:

Period Type:

duration

- Definition

A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityCentralIndexKey

Namespace Prefix:

dei_

Data Type:

dei:centralIndexKeyItemType

Balance Type:

Period Type:

duration

- Definition

Indicate if registrant meets the emerging growth company criteria.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityEmergingGrowthCompany

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

+ References

No definition available.

+ Details

Name:

dei_EntityFileNumber

Namespace Prefix:

dei_

Data Type:

dei:fileNumberItemType

Balance Type:

Period Type:

duration

- Definition

Two-character EDGAR code representing the state or country of incorporation.

+ References

No definition available.

+ Details

Name:

dei_EntityIncorporationStateCountryCode

Namespace Prefix:

dei_

Data Type:

dei:edgarStateCountryItemType

Balance Type:

Period Type:

duration

- Definition

The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityRegistrantName

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityTaxIdentificationNumber

Namespace Prefix:

dei_

Data Type:

dei:employerIdItemType

Balance Type:

Period Type:

duration

- Definition

Local phone number for entity.

+ References

No definition available.

+ Details

Name:

dei_LocalPhoneNumber

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 13e

-Subsection 4c

+ Details

Name:

dei_PreCommencementIssuerTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14d

-Subsection 2b

+ Details

Name:

dei_PreCommencementTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Title of a 12(b) registered security.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b

+ Details

Name:

dei_Security12bTitle

Namespace Prefix:

dei_

Data Type:

dei:securityTitleItemType

Balance Type:

Period Type:

duration

- Definition

Name of the Exchange on which a security is registered.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection d1-1

+ Details

Name:

dei_SecurityExchangeName

Namespace Prefix:

dei_

Data Type:

dei:edgarExchangeCodeItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14a

-Subsection 12

+ Details

Name:

dei_SolicitingMaterial

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Trading symbol of an instrument as listed on an exchange.

+ References

No definition available.

+ Details

Name:

dei_TradingSymbol

Namespace Prefix:

dei_

Data Type:

dei:tradingSymbolItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Securities Act

-Number 230

-Section 425

+ Details

Name:

dei_WrittenCommunications

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration