| Relationships | Role | Relationship Start | Relationship End |
| Shamrock Bancshares, Inc. | Parent | 7/26/1984 | 8/9/2002 |
| Sooner Bancshares, Inc. | Parent | 8/1/1975 | 7/25/1984 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Shamrock Bank, N.A. | Buyer | 289,852 | Pooling of Interests | Discontinued | 8/10/2002 |