| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Oil Producers In | Oil & Gas Operator | Dec 1996 | |
| 2 | Oil Producers, Inc. Of Kansas | Wichita, KS 67206 | Oil & Gas Operator | Apr 2024 |
| 3 | Oil Prop Company | Oil & Gas Operator | Sep 1995 | |
| 4 | Oil Properties Co., Inc. | Wichita, KS 67208 | Gas Operator | Dec 2009 |
| 5 | Okmar Oil Compan | Oil & Gas Operator | Feb 1995 | |
| 6 | Oneok Exploratio | Oil & Gas Operator | Mar 1995 | |
| 7 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |