| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Oak Ridge LLC | Wellsville, KS 66092 | Oil Operator | Dec 2019 |
| 2 | Oaks Petroleum I | Oil Operator | Jul 1987 | |
| 3 | Opef Partnership, A General Partnership | Overland Park, KS 66221 | Oil Operator | Dec 2011 |
| 4 | Osborn Energy, L.L.C. | Bucyrus, KS 66013 | Oil & Gas Operator | Jul 2017 |