| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Oil Equipment As | Gas Operator | Jun 1989 | |
| 2 | Oil Producers In | Oil & Gas Operator | Dec 1996 | |
| 3 | Oil Producers, Inc. Of Kansas | Wichita, KS 67206 | Oil & Gas Operator | Mar 2025 |
| 4 | Oil Prop Company | Oil & Gas Operator | Sep 1995 | |
| 5 | Oil Property Man | Oil & Gas Operator | Jun 1995 | |
| 6 | Oil Property Management, Inc. | Attica, KS 67009 | Oil & Gas Operator | Feb 2021 |
| 7 | Oklahoma Rig & Salvage, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2015 |
| 8 | Okmar Oil Compan | Oil & Gas Operator | Feb 1995 | |
| 9 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Mar 2025 |