| Relationships | Role | Relationship Start | Relationship End |
| Firstar Corporation Of Iowa | Parent | 6/8/1988 | 11/5/1995 |
| Great Mid-West Financial Company | Parent | 12/31/1984 | 6/7/1988 |
| Great Mid-West Financial Company | Parent | 8/1/1983 | 12/30/1984 |
| K-Three Enterprises, Inc. | Parent | 1/13/1975 | 12/20/1982 |
| Ames Capital Corporation | Subsidary | 12/10/1992 | 11/5/1995 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Firstar Bank Iowa, National Association | Buyer | 2,875,965 | Pooling of Interests | Discontinued | 11/6/1995 |
| Union Story Trust & Savings Bank | Seller | 57,122 | Discontinued | 6/24/1985 |