First Business (NASDAQ: FBIZ) CEO logs 1,531-share tax-withholding stock disposition

Rhea-AI Filing Summary

FIRST BUSINESS FINANCIAL SERVICES, INC. CEO Corey A. Chambas reported a Form 4 transaction involving a tax-withholding disposition of 1,531 shares of common stock on February 16, 2026 at $58.36 per share. After this transaction, he directly owned 116,585 shares, with an additional 16,992 shares held indirectly through a 401(k) plan.

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

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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^*

CHAMBAS COREY A

(Last) (First) (Middle)

401 CHARMANY DRIVE

(Street)

MADISON WI 53719

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
FIRST BUSINESS FINANCIAL SERVICES, INC. [ FBIZ ]

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

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CEO

3. Date of Earliest Transaction (Month/Day/Year)
02/16/2026

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	02/16/2026		F		1,531	D	$58.36	116,585	D
Common Stock								16,992	I	by 401(k) Plan

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:

	Peter J. Wilder (Pursuant to Power of Attorney filed previously)	02/18/2026
	** 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 FBIZ CEO Corey Chambas report on this Form 4?

Corey A. Chambas reported a tax-withholding disposition of 1,531 shares of First Business Financial Services common stock. The shares were disposed of at $58.36 per share to cover tax obligations rather than being sold in an open-market transaction.

How many FBIZ shares did Corey Chambas dispose of and at what price?

Corey Chambas disposed of 1,531 shares of First Business Financial Services common stock at a price of $58.36 per share. The transaction was coded as a tax-withholding event, meaning shares were delivered to satisfy tax liabilities.

How many FBIZ shares does Corey Chambas own after this Form 4 transaction?

After the reported transaction, Corey Chambas directly owned 116,585 shares of First Business Financial Services common stock. In addition, 16,992 shares were held indirectly through a 401(k) plan, reflecting his combined direct and indirect interests.

Was the FBIZ CEO’s Form 4 transaction an open-market sale or tax withholding?

The Form 4 for FBIZ’s CEO shows a tax-withholding disposition, not an open-market sale. The transaction code “F” indicates shares were delivered to pay tax liabilities associated with equity compensation rather than being voluntarily sold on the market.

How are Corey Chambas’s indirect FBIZ holdings structured after this filing?

Following the reported activity, Corey Chambas had 16,992 shares of First Business Financial Services common stock held indirectly. These indirect holdings are maintained through a 401(k) plan, separate from his 116,585 directly owned shares.