| Relationships | Role | Relationship Start | Relationship End |
| Firstar Corporation Of Wisconsin | Parent | 9/1/1990 | 2/14/1993 |
| Elkhorn Bankshares Corporation | Parent | 10/23/1985 | 8/31/1990 |
| Elkhorn Capital Corporation | Subsidary | 11/8/1990 | 2/14/1993 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Firstar Bank Lake Geneva, National Association | Buyer | 111,332 | Discontinued | 2/15/1993 |