First Business Financial Services, Inc. (the “Company” or “First Business Bank”) (Nasdaq:FBIZ) invites participation in a conference call to discuss the Company’s financial and operating performance during its fourth quarter ended December 31, 2025. The conference call and webcast may contain forward-looking statements and other material information.

Corey A. Chambas, Chief Executive Officer, David R. Seiler, President and Chief Operating Officer, and Brian D. Spielmann, Chief Financial Officer, will provide an overview of fourth quarter 2025 results. The management presentation is expected to last approximately fifteen to thirty minutes, followed by investor questions and discussion. The Company’s fourth quarter results will be released after the market closes on Thursday, January 29, 2026 and will also be available in the “Investor Relations” section of the Company’s website.

A replay of the call will be available through Friday, February 6, 2026, by calling 888-660-6264 or 646-517-3975 for international participants. The webcast archive of the conference call will be available on the Company’s website, ir.firstbusiness.bank.

About First Business Bank

First Business Bank® specializes in Business Banking, including Commercial Banking and Specialty Finance, Private Wealth, and Bank Consulting services, and through its refined focus delivers unmatched expertise, accessibility, and responsiveness. Specialty Finance solutions are delivered through First Business Bank’s wholly owned subsidiary First Business Specialty Finance, LLC®. First Business Bank is a wholly owned subsidiary of First Business Financial Services, Inc®. (Nasdaq: FBIZ). For additional information, visit firstbusiness.bank.

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