| Relationships | Role | Relationship Start | Relationship End |
| Bokf Merger Corporation Number Three | Parent | 11/1/1990 | 5/7/1993 |
| Bancoklahoma Corp. | Parent | 10/2/1986 | 10/31/1990 |
| Quatro Corporation | Parent | 12/31/1984 | 10/1/1986 |
| Quatro Corporation | Parent | 12/31/1970 | 12/30/1984 |
| Affiliated Bancservices, Inc. | Subsidary | 12/31/1980 | 10/1/1986 |
| Affiliated Bancservices, Inc. | Subsidary | 12/31/1979 | 12/30/1980 |
| Affiliated Bancservices, Inc. | Subsidary | 10/14/1977 | 12/30/1979 |
| Exchequer Systems, Inc. | Subsidary | 10/8/1976 | 1/2/1979 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Bokf, National Association | Buyer | 32,669,391 | Discontinued | 5/8/1993 |