First Business Financial Services's top three insider shareholders as of September 09, 2026 are Corey A Chambas (Ceo, 122.79K shares), Gerald L Kilcoyne (Director, 66.69K shares), Gerald L Kilcoyne (Director, 66.69K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Corey A Chambas | Ceo | 122,790 | 0 | 122,790 | 22.9% | 19 May, 2026 |
| 2 | Gerald L Kilcoyne | Director | 66,691 | 0 | 66,691 | 12.4% | 19 May, 2026 |
| 3 | Mark J Meloy | Evp | 54,981 | 0 | 54,981 | 10.2% | 15 Apr, 2025 |
| 4 | David R. Seiler | President And Ceo | 41,187 | 0 | 41,187 | 7.7% | 19 May, 2026 |
| 5 | James Edward Hartlieb | Presceo First Business Bank | 31,637 | 0 | 31,637 | 5.9% | 14 Apr, 2026 |
| 6 | Ralph R. Kauten | Director | 29,756 | 0 | 29,756 | 5.5% | 01 Aug, 2025 |
| 7 | Barbara Mccarty Conley | General Counsel | 28,364 | 0 | 28,364 | 5.3% | 19 Apr, 2023 |
| 8 | Daniel P. Olszewski | Director | 27,405 | 0 | 27,405 | 5.1% | 19 May, 2026 |
| 9 | Jodi A Chandler | Chief Human Resources Officer | 22,550 | 0 | 22,550 | 4.2% | 28 Aug, 2026 |
| 10 | Edward G Jr Sloane | Chief Financial Officer | 19,012 | 0 | 19,012 | 3.5% | 20 Feb, 2023 |
| 11 | Bradley A Quade | Chief Credit Officer | 16,582 | 0 | 16,582 | 3.1% | 14 Apr, 2026 |
| 12 | John J Harris | Director | 13,925 | 0 | 13,925 | 2.6% | 20 May, 2024 |
| 13 | Daniel Ovokaitys | Chief Information Officer | 10,668 | 0 | 10,668 | 2.0% | 14 Apr, 2026 |
| 14 | William Kent Lorenz | Director | 9,671 | 0 | 9,671 | 1.8% | 19 May, 2026 |
| 15 | Laurie S. Benson | Director | 8,681 | 0 | 8,681 | 1.6% | 19 May, 2026 |
| 16 | Carla C Chavarria | Director | 8,446 | 0 | 8,446 | 1.6% | 19 May, 2026 |
| 17 | Brian D. Spielmann | Cfo | 7,311 | 0 | 7,311 | 1.4% | 14 Apr, 2026 |
| 18 | Laura M. Garcia | Chief Risk Officer | 4,648 | 0 | 4,648 | 0.9% | 19 May, 2026 |
| 19 | Jason R Graham | Director | 3,930 | 0 | 3,930 | 0.7% | 19 May, 2026 |
| 20 | Niamh M. Kristufek | President Specialty Finance | 3,336 | 0 | 3,336 | 0.6% | 18 Feb, 2026 |
| 21 | Kevin D Crampton | Chief Accounting Officer | 2,347 | 0 | 2,347 | 0.4% | 19 May, 2026 |
| 22 | Mark D Bugher | Director | 2,270 | 0 | 2,270 | 0.4% | 18 May, 2023 |
| 23 | Scott M. Ferris | Director | 575 | 0 | 575 | 0.1% | 18 Aug, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 27 Aug, 2026 | Jodi A Chandler | Chief Human Resources Officer | Disposed S | 675 | $70.19 | $47.38K | 22,550 | Direct |
| 16 Aug, 2026 | Scott M. Ferris | Director | Acquired A | 575 | $0.00 | $0 | 575 | Direct |
| 16 Aug, 2026 | Scott M. Ferris | Director | Acquired A | 575 | $0.00 | $0 | 575 | Direct |
| 16 May, 2026 | Corey A Chambas | Director | Acquired A | 710 | $0.00 | $0 | 122,790 | Direct |
| 16 May, 2026 | Gerald L Kilcoyne | Director | Acquired A | 710 | $0.00 | $0 | 66,691 | Direct |
| 16 May, 2026 | Laurie S. Benson | Director | Acquired A | 710 | $0.00 | $0 | 8,681 | Direct |
| 16 May, 2026 | Daniel P. Olszewski | Director | Acquired A | 710 | $0.00 | $0 | 27,405 | Direct |
| 16 May, 2026 | Gerald L Kilcoyne | Director | Acquired A | 710 | $0.00 | $0 | 66,691 | Direct |
| 16 May, 2026 | Laura M. Garcia | Chief Risk Officer | Disposed F | 194 | $53.81 | $10.44K | 4,648 | Direct |
| 16 May, 2026 | Carla C Chavarria | Director | Acquired A | 710 | $0.00 | $0 | 8,446 | Direct |
| 16 May, 2026 | Kevin D Crampton | Chief Accounting Officer | Disposed F | 54 | $53.81 | $2.91K | 2,347 | Direct |
| 16 May, 2026 | David R. Seiler | President And Ceo | Acquired A | 3,815 | $0.00 | $0 | 41,187 | Direct |
| 16 May, 2026 | David R. Seiler | President And Ceo | Acquired A | 3,815 | $0.00 | $0 | 41,187 | Direct |
| 16 May, 2026 | Jason R Graham | Director | Acquired A | 710 | $0.00 | $0 | 3,930 | Direct |
| 16 May, 2026 | William Kent Lorenz | Director | Acquired A | 710 | $0.00 | $0 | 9,671 | Direct |
| 10 Apr, 2026 | David R. Seiler | President And Coo | Acquired A | 4,780 | $0.00 | $0 | 39,284 | Direct |
| 10 Apr, 2026 | Bradley A Quade | Chief Credit Officer | Acquired A | 2,740 | $0.00 | $0 | 17,678 | Direct |
| 10 Apr, 2026 | Brian D. Spielmann | Cfo | Acquired A | 3,190 | $0.00 | $0 | 8,812 | Direct |
| 10 Apr, 2026 | Bradley A Quade | Chief Credit Officer | Acquired A | 2,740 | $0.00 | $0 | 17,678 | Direct |
| 10 Apr, 2026 | James Edward Hartlieb | Presceo First Business Bank | Acquired A | 2,730 | $0.00 | $0 | 32,803 | Direct |