| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | H & B Well Service, Inc. | Oil & Gas Operator | Aug 1993 | |
| 2 | H. E. Sutton | Oil & Gas Operator | Jan 1990 | |
| 3 | Hallmark Oil And Gas Co., Inc. | Oil & Gas Operator | Jun 2024 | |
| 4 | Herbst Resources, Inc. | Mandeville, LA 70448 | Oil & Gas Operator | Aug 2003 |
| 5 | High-Hope Oil And Gas, Inc | Oil & Gas Operator | Mar 2017 | |
| 6 | Hope Oil Inc | Midland, TX 79702 | Oil & Gas Operator | Oct 2021 |
| 7 | Horton & Freeman | Oil Operator | Apr 1983 | |
| 8 | Hsumy Oil & Gas Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2007 |
| 9 | Hurricane Iron & Steel, Inc. | Oil Operator | Dec 1993 |