| Relationships | Role | Relationship Start | Relationship End |
| Blackhawk Bancorporation | Parent | 6/30/1981 | 6/16/1991 |
| Blackhawk Bancorporation | Parent | 6/30/1980 | 6/29/1981 |
| Blackhawk Bancorporation | Parent | 11/4/1976 | 6/29/1980 |
| Diversified Bank Investment Company | Parent | 12/31/1970 | 1/30/1975 |
| Asset Leasing Inc | Subsidary | 12/31/1984 | 1/28/1991 |
| Century Development Co | Subsidary | 11/4/1976 | 6/30/1977 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Wells Fargo Bank Iowa, National Association | Buyer | 6,606,799 | Discontinued | 6/17/1991 | |
| Parkersburg State Bank | Seller | 21,561 | Discontinued | 3/31/1987 | |
| La Porte City State Bank | Seller | 19,848 | Discontinued | 12/23/1985 |