| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | U S Drilling Company Inc | Holdenville, OK 74848-0913 | Oil & Gas Operator | Mar 2017 |
| 2 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 3 | Union Valley Petroleum Corp | Enid, OK 73701 | Oil & Gas Operator | Jan 2026 |
| 4 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2026 |
| 5 | United Energy & Expl Inc | Ada, OK 74821-2449 | Oil & Gas Operator | Dec 2025 |
| 6 | United Energy & Exploration LLC | Ada, OK 74821 | Oil & Gas Operator | Jan 2026 |
| 7 | United Production Company LLC | Edmond, OK 73003 | Oil & Gas Operator | Jan 2026 |