| Relationships | Role | Relationship Start | Relationship End |
| Firstbank Of Illinois Co. | Parent | 10/31/1986 | 10/27/1991 |
| Kaskaskia Bancgroup & Co. | Parent | 12/31/1979 | 10/30/1986 |
| Kaskaskia Bancgroup & Co. | Parent | 5/28/1976 | 12/30/1979 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Central Bank | Buyer | 767,073 | Discontinued | 10/28/1991 | |
| United Illinois Bank Of Collinsville | Seller | 123,438 | Discontinued | 9/30/1991 | |
| New Athens Federal Savings And Loan Association | Seller | 24,204 | Failure | 11/17/1990 |