| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Oil Drillers & D | Oil & Gas Operator | Feb 1992 | |
| 2 | Oklahoma Energy & Exploration, Inc. | Tulsa, OK 74114 | Oil Operator | Jan 1996 |
| 3 | Onnen, Gerhard E. | Yates Center, KS 66783 | Oil Operator | Feb 2002 |
| 4 | Owens Oil Company, LLC | Yates Center, KS 66783 | Oil Operator | Jun 2025 |
| 5 | Owens Petroleum | Oil Operator | May 2006 | |
| 6 | Owens Petroleum LLC | Yates Center, KS 66783 | Oil & Gas Operator | Jun 2025 |