| Subsidiary | State of Incorporation or Organization | ||||
| First Business Bank | Wisconsin | ||||
| First Business Specialty Finance, LLC | Wisconsin | ||||
| Mitchell Street Apartments Investment, LLC | Wisconsin | ||||
| ABKC Real Estate, LLC | Kansas | ||||
| FBB Real Estate 2, LLC | Kansas | ||||
| FBB Tax Credit Investment, LLC | Wisconsin | ||||
First Madison Investment Corp. | Nevada | ||||