FS Bancorp executive adds shares via stock plan

FS Bancorp, Inc. executive Donn C. Costa, Chief Home Lending EVP, reported an internal equity transaction involving the company’s stock.

Rhea-AI Filing Summary

FS Bancorp, Inc. executive Donn C. Costa, Chief Home Lending EVP, reported an internal equity transaction involving the company’s stock. On the reported date, 330 shares of common stock were purchased at $41.37 per share under FS Bancorp’s Nonqualified 2022 Stock Purchase Plan, which includes a 25% matching component. The filing also lists 9,307 shares held indirectly through an ESOP and 76,172 shares held directly as of the transaction date.

Insider Trade Summary

Other: 330 shares

Other 3 txns

Insider COSTA DONN C

Role Chief Home Lending, EVP

Type	Security	Shares	Price	Value
Other	Common Stock	330	$41.37	$14K
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 81,261 shares (Direct); Common Stock — 9,307 shares (Indirect, By ESOP)

Footnotes (1)

1. F1. These shares were purchased under the Issuer's Nonqualified 2022 Stock Purchase Plan and includes a 25% match.

Key Figures

Shares acquired: 330 shares Purchase price: $41.37 per share Plan match: 25% match +3 more

6 metrics

Shares acquired 330 shares Common Stock purchased under Nonqualified 2022 Stock Purchase Plan

Purchase price $41.37 per share Price for 330 common shares in reported transaction

Plan match 25% match Nonqualified 2022 Stock Purchase Plan matching component

Indirect ESOP holdings 9,307 shares Common Stock held indirectly through ESOP as of transaction date

Direct holdings entry 76,172 shares Common Stock listed as held directly as of transaction date

Direct holdings after J transaction 5,089 shares Common Stock total following the 330-share J-code transaction

Key Terms

Nonqualified 2022 Stock Purchase Plan, ESOP, transaction code J

3 terms

Nonqualified 2022 Stock Purchase Plan financial

"These shares were purchased under the Issuer's Nonqualified 2022 Stock Purchase Plan"

ESOP financial

"nature_of_ownership: By ESOP"

An Employee Stock Ownership Plan (ESOP) is a program that gives employees ownership shares in their company, often as part of their benefits package. It acts like a company-sponsored savings plan, allowing workers to have a stake in the company's success, which can boost motivation and loyalty. For investors, ESOPs can influence company decisions and stock value, making them an important aspect of corporate ownership and governance.

transaction code J financial

"transaction_code: "J" with description Other acquisition or disposition"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did FSBW executive Donn C. Costa report?

Donn C. Costa reported purchasing 330 shares of FS Bancorp common stock. The shares were acquired at $41.37 each under the company’s Nonqualified 2022 Stock Purchase Plan, which also provides a 25% matching component on purchases.

At what price were the FS Bancorp (FSBW) shares acquired in this Form 4?

The reported FS Bancorp shares were acquired at $41.37 per share. This price applied to the 330 common shares purchased under the Nonqualified 2022 Stock Purchase Plan, which also includes an additional 25% match in shares under the plan’s terms.

What does the 25% match mean in FS Bancorp’s 2022 Stock Purchase Plan?

The 25% match means FS Bancorp contributes additional shares equal to 25% of the participant’s purchase. In this filing, the 330 shares were bought under the Nonqualified 2022 Stock Purchase Plan and the total reported includes this matching component from the issuer.

How many FS Bancorp (FSBW) shares does Donn C. Costa hold indirectly?

The filing reports that Donn C. Costa indirectly holds 9,307 FS Bancorp common shares. These shares are held through an ESOP, indicating they are part of an employee stock ownership arrangement rather than directly registered in his own name.

What direct share holdings for FSBW are disclosed for Donn C. Costa?

The document lists 76,172 FS Bancorp common shares held directly by Donn C. Costa. It also discloses a separate direct holding line showing 5,089 shares following the reported transaction, indicating multiple direct holding entries in his overall ownership profile.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/08/2026 - 03:20 PM EDT Learn about SEC filing dates

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 WASHINGTON 98043

(City) (State) (Zip)

UNITED STATES

(Country)

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, EVP

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/06/2026

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

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

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

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	05/06/2026		J(1)		330	A	$41.37	5,089	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	05/08/2026
	** 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.
* Form 4: SEC 1474 (03-26)