| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | J & K Operating Company Inc. | Oil & Gas Operator | Mar 2024 | |
| 2 | J & M Operators | Oil & Gas Operator | Dec 1997 | |
| 3 | J And J Operators LLC | Oil & Gas Operator | Mar 2024 | |
| 4 | J. E. Baker | Oil Operator | Dec 1998 | |
| 5 | J. I. Hathaway Opr. | Oil & Gas Operator | Dec 1988 | |
| 6 | J. L. Davis | Oil & Gas Operator | Dec 1985 | |
| 7 | J. M. Peters Co. Inc. | Oil & Gas Operator | Dec 1990 | |
| 8 | J. M. Van Horn Operator | Oil Operator | Dec 1989 | |
| 9 | J.P. Oil Company LLC | Oil & Gas Operator | Feb 2024 | |
| 10 | Jacat Oil Co. | Oil Operator | Dec 1990 | |
| 11 | Jaco Production Company | Bakersfield, CA 93380 | Oil Operator | Feb 2024 |
| 12 | James C. Thomas III | Oil & Gas Operator | Dec 1989 | |
| 13 | James S. Anderson | Oil & Gas Operator | Feb 2024 | |
| 14 | James Sherman & Dennis Weese | Oil & Gas Operator | Feb 2024 | |
| 15 | Jean Martinez | Oil Operator | Feb 2024 | |
| 16 | Jeanne E. Nevins | Oil Operator | Dec 2000 | |
| 17 | Jeans Well Service | Gas Operator | Dec 1985 | |
| 18 | Jim Graham | Oil & Gas Operator | Jan 2018 | |
| 19 | John A. Thomas | Oil & Gas Operator | Feb 2024 | |
| 20 | John A. Thomas & Linda Thomas | Oil Operator | Feb 2024 | |
| 21 | John Guzman Crane Service Inc. | Oil & Gas Operator | Mar 2024 | |
| 22 | John L. Sowers | Oil & Gas Operator | Dec 2009 | |
| 23 | John M. & W. F. Rohrig | Oil Operator | Dec 1986 | |
| 24 | John O. Richardson Operator | Oil & Gas Operator | Mar 2024 | |
| 25 | John Pestana Family Trust | Oil & Gas Operator | Dec 1994 | |
| 26 | John Tedesco | Oil & Gas Operator | Feb 2024 | |
| 27 | Jordan Oil & Gas Company | Healdsburg, CA 95448-1919 | Oil & Gas Operator | Mar 1995 |
| 28 | Joro Inc. | Oil & Gas Operator | Feb 2024 | |
| 29 | JXR Company | Oil Operator | Dec 1991 |