First Business Financial (FBIZ) officer reports 2,930-share stake

Rhea-AI Filing Summary

First Business Financial Services, Inc. reported that officer Niamh M. Kristufek, President - Specialty Finance, beneficially owns 2,930 shares of the company’s common stock. These shares are held directly and are shown as of January 30, 2026 in this Form 3 ownership report.

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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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1. Name and Address of Reporting Person^*

Kristufek Niamh M.

(Last) (First) (Middle)

401 CHARMANY DRIVE

(Street)

MADISON WI 53719

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
01/30/2026

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President - Specialty Finance

5. 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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	2,930	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	Peter J. Wilder (Pursuant to Power of Attorney)	02/09/2026
	** 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 5 (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 does the FBIZ Form 3 filed for Niamh M. Kristufek show?

The Form 3 shows that officer Niamh M. Kristufek beneficially owns 2,930 shares of First Business Financial Services common stock. The filing reflects her position as President - Specialty Finance and lists these shares as directly held as of January 30, 2026.

How many FBIZ shares does Niamh M. Kristufek beneficially own?

Niamh M. Kristufek beneficially owns 2,930 shares of First Business Financial Services common stock. The Form 3 indicates this amount as her total holdings following the reported date, and classifies the ownership as direct rather than through an intermediary entity.

What is Niamh M. Kristufek’s role at First Business Financial Services (FBIZ)?

Niamh M. Kristufek serves as an officer of First Business Financial Services with the title President - Specialty Finance. This role is explicitly identified in the Form 3, which ties her reported common stock holdings to her status as a company officer.

Are Niamh M. Kristufek’s FBIZ shares held directly or indirectly?

Her 2,930 shares of First Business Financial Services common stock are held directly. The Form 3 lists the ownership form as “D” for direct and provides no indication of indirect ownership through trusts, partnerships, or other entities in the filing excerpt.

What security is reported in Niamh M. Kristufek’s FBIZ Form 3?

The Form 3 reports beneficial ownership of First Business Financial Services common stock. It lists a single line in the non-derivative securities table, showing 2,930 shares of common stock held directly, with no derivative securities reported in the derivative securities table.