| Relationships | Role | Relationship Start | Relationship End |
| Mcorp Financial Inc | Parent | 10/10/1984 | 3/28/1989 |
| Southwest Bancshares, Inc. | Parent | 10/11/1972 | 10/9/1984 |
| First National Bank Stock Pool Trust | Parent | 8/18/1970 | 10/10/1972 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Bank One, Texas, National Association | Buyer | 31,498,941 | Failure | 3/29/1989 | |
| Dowlen And Phelan | Seller | Discontinued | 3/18/1988 |