| Relationships | Role | Relationship Start | Relationship End |
| United Bankers, Inc. | Parent | 10/14/1980 | 9/29/1988 |
| First Southwest Bancorporation, Inc. | Parent | 12/31/1970 | 10/7/1975 |
| Sabine Development, Inc. | Subsidary | 12/31/1970 | 9/29/1988 |
| Sabine Gulfway Corp. | Subsidary | 12/31/1970 | 10/13/1980 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| United Bank Of Waco, National Association | Buyer | 250,030 | Discontinued | 9/30/1988 |