FS Bancorp EVP Costa exercises 36,800 stock options

FS Bancorp, Inc. reports that Donn C. Costa, Chief Home Lending, EVP, exercised 36,800 stock options on October 26, 2026, at a $29.30 exercise price, acquiring 36,800 common shares.

Rhea-AI Filing Summary

FS Bancorp, Inc. reports that Donn C. Costa, Chief Home Lending, EVP, exercised 36,800 stock options on October 26, 2026, at a $29.30 exercise price, acquiring 36,800 common shares. The same-day report lists 36,800 common shares delivered or withheld for payment of exercise price or tax liability, at a reported transaction price of $43.77 per share. After the exercise, options covering 24,810 shares remained; 9,307 common shares were held indirectly by ESOP. No Rule 10b5-1 plan is reported.

Insider Trade Summary

36,800 shares exercised/converted

Exercise 5 txns

Insider COSTA DONN C

Role Chief Home Lending, EVP

Type	Security	Shares	Price	Value
Exercise	Stock Option (Right to Buy)	36,800	$0.00	$0.00
Exercise	Common Stock	36,800	$29.30	$1.08M
Exercise Price or Tax Liability	Common Stock	36,800	$43.77	$1.61M
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Stock Option (Right to Buy) — 24,810 contracts (Direct); Common Stock — 81,261 shares (Direct); Common Stock — 9,307 shares (Indirect, By ESOP)

Key Figures

Stock options exercised: 36,800 options Exercise price: $29.30 per share Common shares acquired: 36,800 shares +4 more

7 metrics

Stock options exercised 36,800 options October 26, 2026

Exercise price $29.30 per share Options exercised on October 26, 2026

Common shares acquired 36,800 shares Through the option exercise on October 26, 2026

Shares delivered or withheld 36,800 shares For payment of exercise price or tax liability on October 26, 2026

Reported transaction price $43.77 per share Shares delivered or withheld on October 26, 2026

Options remaining 24,810 shares Following the October 26, 2026 exercise

Shares held indirectly by ESOP 9,307 shares Reported October 26, 2026

Key Terms

Stock Option (Right to Buy), exercise price, ESOP

3 terms

Stock Option (Right to Buy) financial

"Stock Option (Right to Buy)"

exercise price financial

"at a $29.30 exercise price"

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

ESOP financial

"held indirectly 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.

FAQ

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

How many FSBW options did Donn C. Costa exercise?

Donn C. Costa exercised 36,800 stock options on October 26, 2026, at a $29.30 exercise price. Options covering 24,810 shares remained after the exercise, and no Rule 10b5-1 plan is reported.

How many FSBW shares were delivered or withheld in the exercise?

The report lists 36,800 common shares delivered or withheld for payment of exercise price or tax liability, at a reported transaction price of $43.77 per share, on October 26, 2026.

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

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Available on EDGAR 10/28/2026 - 11:54 AM EDT Accepted by SEC EDGAR 10/28/2026 - 11:54 AM 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)
10/26/2026

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	10/26/2026		M		36,800	A	$29.3	112,972	D
Common Stock	10/26/2026		F		36,800	D	$43.77	76,172	D
Common Stock								5,089	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
Stock Option (Right to Buy)	$29.3	10/26/2026		M			36,800	08/15/2019	08/15/2028	Common Stock	36,800	$0	24,810	D

Explanation of Responses:

	/s/ Donn C. Costa	10/27/2026
	** 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)