| 1 | H F Production Co., LTD. | Wichita Falls, TX 76309 | Oil Operator | Feb 2020 |
| 2 | Halcon Operating Co., Inc. | Houston, TX 77024 | Oil & Gas Operator | Oct 2025 |
| 3 | Hale Oil & Gas Properties | Graham, TX 76450 | Oil & Gas Operator | Jul 1997 |
| 4 | Harding Exploration, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2016 |
| 5 | Haynes & Shirley Production Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Oct 2025 |
| 6 | Hebron Energy, LLC | Dallas, TX 75206 | Oil Operator | Jul 2018 |
| 7 | Henderson & Erickson, Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 8 | Hoco Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 9 | Hodgden Operating Co., Inc. | Enid, OK 73702 | Oil & Gas Operator | Jul 2025 |
| 10 | Hodgden, Jack D. | Enid, OK 73702 | Oil & Gas Operator | Apr 2000 |
| 11 | Holliday CSG Corp. | Holliday, TX 76366 | Oil & Gas Operator | Oct 2025 |
| 12 | Home Petroleum Corp | Victoria, TX 77902 | Oil & Gas Operator | Oct 2025 |
| 13 | Hood, J. F. | Holliday, TX 76366 | Oil & Gas Operator | Apr 2010 |
| 14 | Hood, J. Frank, Jr. | Arlington, TX 76006 | Oil & Gas Operator | Oct 2025 |
| 15 | Houtchens, D. D. | Gainesville, TX 76240 | Oil & Gas Operator | Oct 2025 |
| 16 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Oct 2025 |
| 17 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 18 | HWH Production, LLC | Muenster, TX 76252 | Oil Operator | Oct 2025 |