FS Bancorp (FSBW) EVP Donn Costa acquires 505 shares under 2022 stock plan

Rhea-AI Filing Summary

FS Bancorp, Inc. officer Donn C. Costa reported a purchase of 505 shares of common stock on February 6, 2026 at $42.28 per share. The shares were acquired under the company’s Nonqualified 2022 Stock Purchase Plan, which includes a 25% matching component.

After this transaction, Costa directly owned 4,759 common shares from this line plus additional directly held common stock totaling 76,172 shares, and indirectly held 9,307 shares through an ESOP. Costa serves as Chief Home Lending Officer and Executive Vice President.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider COSTA DONN C

Role Chief Home Lending Officer/EVP

Type	Security	Shares	Price	Value
Other	Common Stock	505	$42.28	$21K
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 4,759 shares (Direct); Common Stock — 9,307 shares (Indirect, By ESOP)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

COSTA DONN C

(Last) (First) (Middle)

6920 220TH STREET SW

(Street)

MOUNTLAKE TERRACE WA 98043

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
FS Bancorp, Inc. [ FSBW ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Home Lending Officer/EVP

3. Date of Earliest Transaction (Month/Day/Year)
02/06/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/06/2026		J(1)		505	A	$42.28	4,759	D
Common Stock								76,172	D
Common Stock								9,307	I	By ESOP

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. These shares were purchased under the Issuer's Nonqualified 2022 Stock Purchase Plan and includes a 25% match.

	/s/Donn C. Costa	02/10/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did FS Bancorp (FSBW) report for Donn C. Costa?

FS Bancorp reported that officer Donn C. Costa acquired 505 shares of common stock on February 6, 2026 at $42.28 per share. The purchase occurred under the Nonqualified 2022 Stock Purchase Plan, which provides a 25% share match to participants.

Who is Donn C. Costa in relation to FS Bancorp (FSBW)?

Donn C. Costa is an officer of FS Bancorp, serving as Chief Home Lending Officer and Executive Vice President. As a Section 16 insider, his equity transactions in FS Bancorp common stock must be disclosed through Form 4 filings with the U.S. Securities and Exchange Commission.

How many FS Bancorp (FSBW) shares did Donn C. Costa own after the reported purchase?

Following the reported transaction, Costa directly held 4,759 common shares from the reported line, along with other direct holdings totaling 76,172 shares. He also indirectly held 9,307 FS Bancorp common shares through an employee stock ownership plan, reflecting both direct and ESOP-related interests.

At what price were the FS Bancorp (FSBW) shares acquired by Donn C. Costa?

The 505 FS Bancorp common shares were acquired at $42.28 per share on February 6, 2026. This transaction is coded as type “J,” indicating an acquisition under a transaction type such as a company plan rather than an open-market discretionary trade.

What is the Nonqualified 2022 Stock Purchase Plan mentioned in the FS Bancorp (FSBW) filing?

The Nonqualified 2022 Stock Purchase Plan is a FS Bancorp program under which Costa acquired shares. The filing notes that the purchased shares include a 25% match, meaning the company contributes additional shares equal to one-quarter of the participant’s purchased amount.

How are Donn C. Costa’s indirect FS Bancorp (FSBW) holdings structured?

Costa’s indirect holdings consist of 9,307 FS Bancorp common shares held “By ESOP,” referring to an employee stock ownership plan. These ESOP shares are reported separately from his directly held shares, reflecting an additional form of equity-based participation in the company.