| Relationships | Role | Relationship Start | Relationship End |
| Pinnacle Bancorp, Inc. | Parent | 7/1/1997 | 5/26/2000 |
| First Ogallala Investment, Inc. | Parent | 11/23/1981 | 6/30/1997 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Pinnacle Bank | Buyer | 4,363,203 | Pooling of Interests | Discontinued | 5/27/2000 |
| United Nebraska Bank, Grant | Seller | 47,460 | Discontinued | 1/16/1993 |