| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | H. E. Sutton | Oil & Gas Operator | Jan 1990 | |
| 2 | H. L. McKee & J. P. McKee Jr. | Gas Operator | Mar 2023 | |
| 3 | H. Proler-Luffey Gas Corp. | Gas Operator | Apr 1979 | |
| 4 | Haddox Petroleum Corp | Gas Operator | Dec 2010 | |
| 5 | Hargraves Production, LLC | Oil Operator | Jan 2024 | |
| 6 | Hawkins Oil & Gas Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2016 |
| 7 | Herbst Resources, Inc. | Mandeville, LA 70448 | Oil & Gas Operator | Aug 2003 |
| 8 | Herd Producing Company, Inc. | Tyler, TX 75711 | Oil & Gas Operator | May 2024 |
| 9 | Hillside Oil & Gas, LLC | Midland, TX 79708 | Oil & Gas Operator | Apr 2016 |
| 10 | Homer D. Oliver | Gas Operator | Sep 1998 | |
| 11 | Hootkins-Smith,La LTD. | Gas Operator | Jun 1985 |