| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | H & L Operators | Oil & Gas Operator | Dec 2002 | |
| 2 | H & R Oil Company | Oil & Gas Operator | Dec 2000 | |
| 3 | Hathaway Company | Oil & Gas Operator | Mar 2025 | |
| 4 | Henry And Jane Fong | Oil Operator | Dec 1989 | |
| 5 | Herley Petroleum | Oil & Gas Operator | Dec 1997 | |
| 6 | Herley-Kelley LLC | Oil & Gas Operator | Apr 2025 | |
| 7 | Herlindah Gallegos | Oil Operator | Dec 2007 | |
| 8 | Hillside Oil Partners | Oil & Gas Operator | Dec 1999 | |
| 9 | Hiwa Petroleum Corp. | Oil & Gas Operator | Mar 2025 | |
| 10 | Horizon Operating Co. | Oil & Gas Operator | Dec 1995 | |
| 11 | Hunt Enterprises | Oil & Gas Operator | Mar 2025 |