| Relationships | Role | Relationship Start | Relationship End |
| Great Plains Bancshares, Inc. | Parent | 4/19/1995 | 7/16/1996 |
| Great Plains Bancshares, Inc. | Parent | 3/7/1995 | 4/18/1995 |
| Mangum Bancshares, Inc. | Parent | 12/31/1992 | 3/6/1995 |
| Mangum Bancshares, Inc. | Parent | 1/15/1992 | 12/30/1992 |
| First Mangum Corp. | Parent | 12/17/1979 | 1/14/1992 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Great Plains National Bank | Buyer | 538,070 | Pooling of Interests | Discontinued | 7/17/1996 |