| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Occidental Energy Marketing, Inc. | Houston, TX 77227 | Gas Operator | Sep 2015 |
| 2 | Oklahoma Oil Company | Dallas, TX 75206 | Oil & Gas Operator | Aug 2013 |
| 3 | Omimex Energy, Inc. | Fort Worth, TX 76120 | Oil & Gas Operator | Jun 2023 |
| 4 | Onaroll Operating LLC | Levelland, TX 79336 | Oil Operator | Apr 2024 |
| 5 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 6 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |