| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Unbridled Resources, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2026 |
| 2 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2026 |
| 3 | United Oil Corporation | Denver, CO 80202-3813 | Oil & Gas Operator | Jan 2026 |
| 4 | United Production Company LLC | Edmond, OK 73003 | Oil & Gas Operator | Feb 2026 |
| 5 | Universal Fuels Company | Oil & Gas Operator | Oct 1993 |