| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Umad LLC | Oil & Gas Operator | Feb 2010 | |
| 2 | Unioil | Denver, CO 80203 | Oil & Gas Operator | Dec 2010 |
| 3 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Dec 2025 |
| 4 | United States Exploration, Inc. | Denver, CO 80802 | Oil & Gas Operator | Apr 2007 |