| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Oil Company Of America, Inc. | Hays, KS 67601 | Oil Operator | Dec 2009 |
| 2 | Oil Internationa | Oil Operator | Jun 1986 | |
| 3 | Oil Producers In | Oil & Gas Operator | Dec 1996 | |
| 4 | Oil Producers, Inc. Of Kansas | Wichita, KS 67206 | Oil & Gas Operator | Dec 2024 |
| 5 | Okmar Oil Compan | Oil & Gas Operator | Feb 1995 | |
| 6 | Oryx Energy Comp | Oil & Gas Operator | Apr 1991 | |
| 7 | Owen'S Pumping Service | Oil Operator | Sep 2024 | |
| 8 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Dec 2024 |