| Relationships | Role | Relationship Start | Relationship End |
| Gulf Southwest Nevada Bancorp, Inc. | Parent | 5/1/1995 | 12/31/1995 |
| Texas Gulf Coast Bancorp, Inc. | Parent | 5/23/1991 | 4/30/1995 |
| Texas Gulf Coast Bancorp, Inc. | Parent | 4/23/1984 | 5/22/1991 |
| Mainland Bancshares, Inc. | Parent | 12/31/1980 | 4/22/1984 |
| Mainland Bancshares, Inc. | Parent | 7/12/1979 | 12/30/1980 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Merchants Bank | Buyer | 572,669 | Pooling of Interests | Discontinued | 1/1/1996 |
| Dickinson Branch | Seller | Discontinued | 7/1/1991 | ||
| La Marque Bank | Seller | 6,311 | Failure | 9/11/1987 |