| Relationships | Role | Relationship Start | Relationship End |
| First Chicago Nbd Corporation | Parent | 5/14/1986 | 4/30/1990 |
| Midland Bancorp, Inc. | Parent | 1/1/1974 | 5/13/1986 |
| Port Huron Financial Company | Parent | 10/11/1971 | 12/31/1973 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Bank One, Michigan | Buyer | 20,267,024 | Discontinued | 5/1/1990 | |
| Nbd Port Huron Bank National Association | Seller | Discontinued | 5/1/1986 |