| Relationships | Role | Relationship Start | Relationship End |
| South Plains Delaware Financial Corporation | Parent | 4/2/1996 | 7/31/1998 |
| South Plains Financial Corporation | Parent | 2/28/1992 | 4/1/1996 |
| Morton Financial Corporation | Parent | 1/8/1985 | 2/27/1992 |
| Morton Bancshares, Inc. | Parent | 12/31/1984 | 1/7/1985 |
| Morton Bancshares, Inc. | Parent | 8/1/1980 | 12/30/1984 |
| West Texas Trust Company | Subsidary | 1/4/1993 | 7/31/1998 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| City Bank | Buyer | 2,554,089 | Pooling of Interests | Discontinued | 8/1/1998 |