| Relationships | Role | Relationship Start | Relationship End |
| First Chicago Nbd Corporation | Parent | 6/2/1987 | 8/31/1990 |
| United Michigan Corporation | Parent | 3/28/1985 | 6/1/1987 |
| United Michigan Corporation | Parent | 8/1/1981 | 3/27/1985 |
| United Michigan Corporation | Parent | 5/15/1973 | 7/31/1981 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Bank One, Michigan | Buyer | 20,267,024 | Discontinued | 9/1/1990 | |
| Davison State Bank | Seller | Discontinued | 11/23/1962 | ||
| Vernon State Bank | Seller | Discontinued | 3/6/1961 |