| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Onyxx Energy LLC | Oil & Gas Operator | Mar 2017 | |
| 2 | Opmi Operating Company | Houston, TX 77057 | Oil & Gas Operator | Jun 2008 |
| 3 | Optimistic Oil Co. | Oil & Gas Operator | Dec 1991 | |
| 4 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |