| Relationships | Role | Relationship Start | Relationship End |
| Comerica Bank | Parent | 6/30/2007 | |
| Comerica Bank | Parent | 3/18/2005 | 6/29/2007 |
| Comerica Incorporated | Parent | 5/14/1975 | 3/17/2005 |
| Texas Metric Enterprises, Incorporated | Subsidary | 10/26/1987 | 3/6/1992 |
| Comerica Realty Inc | Subsidary | 5/3/1983 | 12/30/1984 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Comerica Ahoc, Llc | Seller | Discontinued | 12/19/2014 | ||
| Comerica Realty Inc | Seller | Discontinued | 12/18/1990 |