| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Occidental Energy Marketing, Inc. | Houston, TX 77227 | Gas Operator | Sep 2015 |
| 2 | Ocean Energy Inc | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 3 | Oilrox Resources LLC | San Antonio, TX 78258 | Oil & Gas Operator | Feb 2026 |
| 4 | Omar Operating Company | Midland, TX 79702 | Oil & Gas Operator | Sep 2013 |
| 5 | Omimex Energy, Inc. | Fort Worth, TX 76120 | Oil & Gas Operator | Apr 2026 |
| 6 | Onaroll Operating LLC | Lubbock, TX 79423 | Oil Operator | Jul 2026 |
| 7 | Orion Energen Inc. | Austin, TX 78731 | Oil & Gas Operator | Jul 2023 |