| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Unbridled Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 2 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Oct 2025 |
| 3 | United Oil Corporation | Denver, CO 80202-3813 | Oil & Gas Operator | Jun 2025 |
| 4 | United Production Company LLC | Edmond, OK 73003 | Oil & Gas Operator | Jul 2025 |
| 5 | Universal Fuels Company | Oil & Gas Operator | Oct 1993 |