Form 3 Filing for Scott M. Ferris

This filing reports that Scott M. Ferris, a director at FIRST BUSINESS FINANCIAL SERVICES, INC. (FBIZ), owns 200 shares of common stock. The ownership is indirect and held through a trust. The filing was made on June 2, 2026, with the period of report being June 1, 2026. The document also includes a Power of Attorney, signed by Scott M. Ferris on May 11, 2026, authorizing Peter J. Wilder to execute and file insider trading forms (3, 4, and 5) on his behalf. This power of attorney is durable and will remain in effect despite any future disability or incapacity of Mr. Ferris.