| Relationships | Role | Relationship Start | Relationship End |
| Bank One, Texas, National Association | Parent | 1/1/1990 | 12/30/1994 |
| Mbank Houston, National Association | Parent | 10/10/1984 | 3/28/1989 |
| Bank Of The Southwest National Association, Houston | Parent | 12/31/1980 | 10/9/1984 |
| Southwest Bancshares, Inc. | Parent | 12/31/1979 | 12/30/1980 |
| Bank Of The Southwest National Association, Houston | Parent | 12/10/1970 | 12/30/1979 |