| Relationships | Role | Relationship Start | Relationship End |
| First Interstate Bancsystem, Inc. | Parent | 7/1/1995 | 9/22/1995 |
| First Park County Bancshares, Inc. | Parent | 11/30/1987 | 6/30/1995 |
| U.S. Bancorp | Parent | 5/9/1956 | 11/29/1987 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| First Interstate Bank | Buyer | 8,944,669 | Pooling of Interests | Discontinued | 9/23/1995 |