| Relationships | Role | Relationship Start | Relationship End |
| Blackwell Security Bancshares, Inc. | Parent | 12/31/1984 | 2/3/1995 |
| Blackwell Security Bancshares, Inc. | Parent | 12/31/1982 | 12/30/1984 |
| Blackwell Security Bancshares, Inc. | Parent | 12/31/1980 | 12/30/1982 |
| Blackwell Security Bancshares, Inc. | Parent | 12/28/1979 | 12/30/1980 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Boatmen's National Bank Of Oklahoma | Buyer | 4,092,924 | Acquisition | Discontinued | 2/4/1995 |