| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Occidental Energy Company, Inc. | Houston, TX 77282 | Oil & Gas Operator | Jul 2021 |
| 2 | Ody Oil Corp. | Oil & Gas Operator | Oct 1994 | |
| 3 | Oleum Inc | Oil & Gas Operator | Mar 1996 | |
| 4 | Oleum Operating Company, L.C. | Longview, TX 75606 | Oil & Gas Operator | Dec 2021 |
| 5 | Olipdp II, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Dec 2025 |
| 6 | Onyxx Energy LLC | Oil & Gas Operator | Mar 2017 | |
| 7 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |