| Relationships | Role | Relationship Start | Relationship End |
| First Southwest Bancorporation, Inc. | Parent | 12/31/1970 | 10/7/1975 |
| First Financial Corporation | Parent | 12/31/1970 | 2/26/1975 |
| First Financial Corporation | Parent | 12/31/1959 | 12/30/1970 |
| First Financial Corporation | Parent | 10/31/1952 | 12/30/1959 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| American Bank, National Association | Buyer | 428,991 | Discontinued | 11/1/1987 |