| Relationships | Role | Relationship Start | Relationship End |
| First Interstate Bancsystem, Inc. | Parent | 12/18/1996 | 6/20/1997 |
| Mountain Bank System, Inc. | Parent | 1/1/1992 | 12/17/1996 |
| Mountain Bank System, Inc. | Parent | 12/8/1980 | 12/31/1991 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| First Interstate Bank | Buyer | 8,944,669 | Pooling of Interests | Discontinued | 6/21/1997 |