| Relationships | Role | Relationship Start | Relationship End |
| Norbanco, Inc. | Parent | 12/31/1979 | 11/20/1986 |
| Norbanco, Inc. | Parent | 12/15/1979 | 12/30/1979 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Boatmen's First National Bank Of Oklahoma | Buyer | 1,592,266 | Failure | 11/21/1986 |