| Relationships | Role | Relationship Start | Relationship End |
| Banc One Colorado Corporation | Parent | 11/2/1993 | 3/11/1994 |
| Colorado Western Bancorp, Inc. | Parent | 8/1/1988 | 11/1/1993 |
| United Banks Of Colorado, Inc. | Parent | 12/31/1982 | 4/30/1987 |
| United Banks Of Colorado, Inc. | Parent | 10/18/1972 | 12/30/1982 |
| Westnet Bank, National Association | Subsidary | 7/31/1984 | 11/30/1986 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Bank One, Western Colorado, National Association | Buyer | 351,611 | Discontinued | 3/12/1994 |