| Relationships | Role | Relationship Start | Relationship End |
| First Southwest Bancorporation, Inc. | Parent | 12/31/1970 | 10/7/1975 |
| East Texas Corporation | Subsidary | 12/31/1970 | 9/30/1973 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Austin Bank, National Association | Buyer | 180,262 | Failure | 6/29/1984 |