| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | J & D Investment | Oil Operator | Oct 1993 | |
| 2 | James P. Williams Enterprises, Inc. | Palco, KS 67657 | Oil Operator | May 2026 |
| 3 | Jason Oil Compan | Oil Operator | Sep 1992 | |
| 4 | Jason Oil Company | Oil Operator | Dec 2014 | |
| 5 | Jason Oil Company, LLC | Russell, KS 67665 | Oil Operator | May 2026 |
| 6 | Jaspar Co. | Hays, KS 67601 | Oil Operator | May 2026 |
| 7 | Jay C. Boyer Oil | Oil Operator | Nov 2009 | |
| 8 | John O. Farmer, Inc. | Oil & Gas Operator | Dec 1996 | |
| 9 | Jolen Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2026 |