| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | H & B Well Service, Inc. | Oil & Gas Operator | Aug 1993 | |
| 2 | H M Jarred & Walsh-Watts | Oil & Gas Operator | Sep 1992 | |
| 3 | H. E. Sutton | Oil & Gas Operator | Jan 1990 | |
| 4 | Halliburton Operating Company | Plano, TX 75093 | Oil & Gas Operator | Apr 2024 |
| 5 | Hallmark Oil And Gas Co., Inc. | Oil & Gas Operator | Dec 2023 | |
| 6 | High-Hope Oil And Gas, Inc | Oil & Gas Operator | Mar 2017 | |
| 7 | Hilliard Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 2009 |
| 8 | Hunt Petroleum Corporation | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |