| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 2 | Houston Oil & Minerals Corp. | Houston, TX 77002 | Oil & Gas Operator | Aug 1996 |
| 3 | Hughes & Hughes | Oil & Gas Operator | May 1984 | |
| 4 | Hughes Denny Offshore Expl Inc | Oil & Gas Operator | Nov 1988 | |
| 5 | Hughes Eastern Corporation | Ridgeland, MS 39157 | Oil & Gas Operator | Dec 2023 |
| 6 | Hughes Eastern Petroleum, LTD. | Oil & Gas Operator | Jun 1986 | |
| 7 | Hughes-Denny Petroleum Co.,Inc | Oil & Gas Operator | Dec 1987 | |
| 8 | Hunt Industries, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Nov 2000 |
| 9 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |