| 1 | H & H Production Company | Muenster, TX 76252 | Oil & Gas Operator | Oct 2005 |
| 2 | H & S Production, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Mar 2004 |
| 3 | H.L. Clark Oil Company LLC | Whitesboro, TX 76273 | Oil Operator | Oct 2025 |
| 4 | Hacker Brothers Oil Company, Inc | Muenster, TX 76252 | Oil & Gas Operator | May 2004 |
| 5 | Hacker Brothers Well Service,Inc | Muenster, TX 76252 | Oil & Gas Operator | Oct 2025 |
| 6 | Hacker, Freddie J. | Muenster, TX 76252 | Oil & Gas Operator | Dec 2012 |
| 7 | Hadley Oil | Nocona, TX 76255 | Oil Operator | Jan 2014 |
| 8 | Hadley Oil Company, LLC | Nocona, TX 76255 | Oil Operator | Oct 2025 |
| 9 | Hall Energy Company LLC | Oklahoma City, OK 73120-5020 | Oil & Gas Operator | Jul 2022 |
| 10 | Hamilton Brothers Oil Co. | Houston, TX 77057 | Oil & Gas Operator | Mar 2015 |
| 11 | Hane Operating, Inc. | Santa Anna, TX 76878 | Oil & Gas Operator | Sep 2005 |
| 12 | Harper, Wayne | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 13 | Haverkamp, Floyd | Muenster, TX 76252 | Oil & Gas Operator | Oct 2001 |
| 14 | Hawkeye Transmission Company | Dallas, TX 75244 | Oil & Gas Operator | Jun 2000 |
| 15 | Heape Exploration, Inc. | Dallas, TX 75367 | Oil & Gas Operator | Dec 2020 |
| 16 | Heape, Gene G. | Dallas, TX 75367 | Oil & Gas Operator | Jun 2003 |
| 17 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Jun 2025 |
| 18 | Henley Operating | Nocona, TX 76255 | Oil & Gas Operator | Oct 2025 |
| 19 | Henscheid, Rufus | Muenster, TX 76252 | Oil Operator | Jan 2020 |
| 20 | Hep Oil Company LTD | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2012 |
| 21 | Hep Oil GP, LLC | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |
| 22 | Heritage Petroleum, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Oct 2025 |
| 23 | Hermes, A. J. | Lindsay, TX 76250 | Oil & Gas Operator | Mar 2018 |
| 24 | Herv Oil, LLC | Oklahoma City, OK 73116 | Oil Operator | Jun 2025 |
| 25 | Hess Bros. DRLG. Co. | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2008 |
| 26 | Hess, Jerry Operating Co. | Muenster, TX 76252 | Oil & Gas Operator | Oct 2025 |
| 27 | Houtchens, D. D. | Gainesville, TX 76240 | Oil & Gas Operator | Oct 2025 |
| 28 | Houtchens, DD & Anna D LVNG TRST | Garland, TX 75043 | Oil Operator | Jun 2025 |
| 29 | Howard Operating Co. | Saint Jo, TX 76265 | Oil & Gas Operator | Oct 2025 |
| 30 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Oct 2025 |
| 31 | HWH Production, LLC | Muenster, TX 76252 | Oil Operator | Oct 2025 |