| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Oak Energy, LLC | Houston, TX 77027 | Oil & Gas Operator | Dec 2024 |
| 2 | Ocean Energy Inc | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 3 | Oklahoma RB Operating Company | Midland, TX 79701 | Oil & Gas Operator | Jan 1998 |
| 4 | Omimex Petroleum Inc | Fort Worth, TX 76120 | Oil & Gas Operator | Aug 2022 |
| 5 | Ops Group Limited | Houston, TX 77060 | Oil & Gas Operator | Jun 2014 |
| 6 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 7 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Dec 2024 |