FBIZ furnishes investor slides (Exhibit 99.1) under Reg FD

Rhea-AI Filing Summary

First Business Financial Services, Inc. furnished an investor presentation under Regulation FD. On November 10, 2025, the company posted updated slides on its website (www.firstbusiness.bank) under Investor Relations and furnished the same as Exhibit 99.1 to this Form 8-K. The materials offer an overview of recent operating performance, financial condition, and business strategy and may be used in meetings with shareholders and analysts.

The information is being furnished, not filed, and is not subject to Section 18 liabilities, except as otherwise required.

8-K Event Classification

2 items: 7.01, 9.01

2 items

Item 7.01 Regulation FD Disclosure Disclosure

Material non-public information disclosed under Regulation Fair Disclosure, often investor presentations or guidance.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, and exhibit attachments filed with this report.

Understanding 8-K Material Events →

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

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): November 10, 2025

First Business Financial Services, Inc.

(Exact name of Registrant as Specified in Its Charter)

Wisconsin			001-34095	39-1576570
(State or Other Jurisdiction of Incorporation)			(Commission File Number)	(IRS Employer Identification No.)
401 Charmany Drive
Madison, Wisconsin				53719
(Address of Principal Executive Offices)				(Zip Code)

Registrant’s Telephone Number, Including Area Code: 608 238-8008

N/A

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Stock, $0.01 par value		FBIZ		The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 7.01. Regulation FD Disclosure.

On November 10, 2025, First Business Financial Services, Inc. (the “Company”) posted an investor presentation to its website www.firstbusiness.bank under the “Investor Relations” tab. The information included in the presentation provides an overview of the Company’s recent operating performance, financial condition, and business strategy. The Company intends to use this presentation from time to time when the Company's executives interact with shareholders, analysts and other third parties. A copy of the registrant’s presentation is attached hereto as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information in this Current Report on Form 8-K and Exhibit 99.1 attached hereto are being “furnished” pursuant to Item 7.01 of Form 8-K, and will not, except to the extent required by applicable law or regulation, be deemed “filed” by the Company for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor will any of such information or exhibits be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, except as expressly set forth by specific reference in such filing.

Item 9.01. Financial Statements and Exhibits.

(a) Not applicable

(b) Not applicable

(c) Not applicable

(d) Exhibits. The following exhibit is being furnished herewith:

99.1		Slides from Investor Presentation.
104		Cover Page Interactive Data File (embedded within the Inline XBRL Document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

November 10, 2025				FIRST BUSINESS FINANCIAL SERVICES, INC.
				By:		/s/ Brian D. Spielmann
				Name:		Brian D. Spielmann
				Title:		Chief Financial Officer

FAQ

What did First Business Financial Services (FBIZ) announce in this 8-K?

The company furnished an investor presentation under Regulation FD and posted the slides on its website.

When was the FBIZ investor presentation made available?

On November 10, 2025, with the slides furnished as Exhibit 99.1.

Where can I find the FBIZ investor presentation?

On www.firstbusiness.bank under the “Investor Relations” tab, and as Exhibit 99.1 to the 8-K.

Is the investor presentation considered filed with the SEC?

No. It is being furnished under Item 7.01 and is not deemed filed, except as required by law.

Does this 8-K include financial statements?

No. Item 9.01 lists Exhibits only, including Exhibit 99.1 and the cover page Inline XBRL file (Exhibit 104).

How does FBIZ plan to use the presentation?

The company intends to use it in interactions with shareholders, analysts, and other third parties.