| Relationships | Role | Relationship Start | Relationship End |
| Mcorp Financial Inc | Parent | 10/10/1984 | 3/28/1989 |
| Southwest Bancshares, Inc. | Parent | 1/5/1982 | 10/9/1984 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Bank One, Texas, National Association | Buyer | 31,498,941 | Failure | 3/29/1989 | |
| Mbank Arlington | Seller | 177,056 | Discontinued | 9/26/1987 | |
| Mbank Mansfield | Seller | 80,440 | Discontinued | 9/26/1987 |