| Relationships | Role | Relationship Start | Relationship End |
| Boatmen's Bancshares Of Iowa, Inc. | Parent | 10/13/1994 | 10/14/1994 |
| Boatmen's Bancshares Of Iowa, Inc. | Parent | 4/1/1992 | 10/12/1994 |
| First Interstate Of Iowa, Inc. | Parent | 2/27/1978 | 3/31/1992 |
| Associated Bank Corporation | Parent | 4/16/1975 | 2/26/1978 |
| First Trust And Union Savings Bank Corporation | Parent | 12/31/1970 | 4/15/1975 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Boatmen's Bank Iowa, National Association | Buyer | 743,261 | Discontinued | 10/15/1994 |