| Relationships | Role | Relationship Start | Relationship End |
| Security Bancorp, Inc. | Parent | 7/1/1980 | 5/31/1992 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| First Of America Bank-Southeast Michigan, National Association | Buyer | 6,367,857 | Discontinued | 6/1/1992 | |
| Security Bank Of Almont | Seller | 28,544 | Discontinued | 6/1/1987 | |
| Security Bank, Imlay City | Seller | 37,069 | Discontinued | 1/31/1987 | |
| New Haven Savings Bank | Seller | 5,421 | Discontinued | 1/1/1975 |