| 1 | Hall Phoenix Energy, LLC | Frisco, TX 75034 | Oil & Gas Operator | Jun 2022 |
| 2 | Hall, Charles C | | Oil Operator | Sep 2017 |
| 3 | Hall-Hargraves, LLC | Oil City, LA 71061 | Oil & Gas Operator | Dec 2023 |
| 4 | Hallwood Petroleum, LLC | Dallas, TX 75219 | Oil & Gas Operator | Jan 2010 |
| 5 | Hanna Oil And Gas Company | Fort Smith, AR 72901 | Oil & Gas Operator | Jan 2024 |
| 6 | Harken Exploration Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2008 |
| 7 | Harvest Oil, LP | Camden, AR 71701 | Oil & Gas Operator | Feb 2024 |
| 8 | Hawkins Oil & Gas Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2016 |
| 9 | Hendricks Oil Company, LLC | | Oil Operator | Jan 2018 |
| 10 | Hickman, Johnny | | Oil & Gas Operator | Oct 2011 |
| 11 | High Plains Petroleum LLC | Bentonville, AR 72712 | Gas Operator | Jan 2024 |
| 12 | Highland Oil & Gas LLC | Houston, TX 77079-7220 | Oil & Gas Operator | Feb 2015 |
| 13 | Hogback Exploration Inc | Fort Smith, AR 72916 | Oil & Gas Operator | Dec 2023 |
| 14 | Holloway, Donald & Francis | | Oil Operator | Jul 2006 |
| 15 | Horizon Natural Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Dec 2023 |
| 16 | Hughes Eastern Corporation | Ridgeland, MS 39157 | Oil & Gas Operator | Dec 2023 |
| 17 | Hughey, Ronnie Oil Company LLC | Stephens, AR 71764 | Oil Operator | Mar 2024 |
| 18 | Hunt, H L | Dallas, TX 75202-2785 | Oil & Gas Operator | Feb 2020 |