| Relationships | Role | Relationship Start | Relationship End |
| Comerica Incorporated | Parent | 8/2/1980 | 12/31/1989 |
| Isb Financial Corporation | Parent | 12/31/1976 | 8/1/1980 |
| Isb Financial Corporation | Parent | 7/13/1971 | 12/30/1976 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Comerica Bank National Association | Buyer | 1,791,219 | Discontinued | 1/1/1990 |