| Relationships | Role | Relationship Start | Relationship End |
| Montana Bancsystem, Inc. | Parent | 10/1/1988 | 3/31/1991 |
| Sidney Holding Company | Parent | 12/31/1978 | 9/30/1988 |
| Sidney Holding Company | Parent | 10/8/1976 | 12/30/1978 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Montana Bank, National Association | Buyer | 261,675 | Discontinued | 4/1/1991 |