| Relationships | Role | Relationship Start | Relationship End |
| Firstar Corporation Of Wisconsin | Parent | 12/24/1985 | 8/12/1988 |
| Security Financial Services, Inc. | Parent | 3/14/1980 | 12/23/1985 |
| Great Wisconsin Corporation | Parent | 8/15/1978 | 3/13/1980 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Firstar Bank Fond Du Lac, National Association | Buyer | 423,356 | Discontinued | 8/13/1988 |