| 1 | H & W Marketing Company | Benbrook, TX 76126 | Oil & Gas Operator | Dec 2002 |
| 2 | H H Exploration, Inc. | Incline VLLG, NV 89451 | Gas Operator | Feb 2018 |
| 3 | H. C. Oil Co. | Weatherford, TX 76085 | Oil & Gas Operator | Feb 2026 |
| 4 | H. K. O. Production | Abilene, TX 79601 | Oil & Gas Operator | May 2002 |
| 5 | H.A.N. Operating Incorporated | Clyde, TX 79510 | Oil & Gas Operator | Aug 2016 |
| 6 | Halek Energy L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | Jan 2014 |
| 7 | Hanvey, Don H. Oil Interests Inc | Cisco, TX 76437 | Oil & Gas Operator | Feb 2026 |
| 8 | Harper, Wayne | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 9 | Harvest Operating Company, Inc. | Cisco, TX 76437 | Oil & Gas Operator | Dec 1997 |
| 10 | Haskit, Kendall | Kyle, TX 78640 | Oil & Gas Operator | Feb 2026 |
| 11 | HB Oil Company | Abilene, TX 79602 | Oil & Gas Operator | Jun 2023 |
| 12 | Heart Land Petroleum Corporation | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 13 | Herd Producing Company, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Feb 2026 |
| 14 | Herod, Bill | Ranger, TX 76470 | Oil & Gas Operator | Apr 2022 |
| 15 | Herring, Ray | Graham, TX 76450 | Oil & Gas Operator | Jul 2014 |
| 16 | Hess, Jerry Operating Co. | Muenster, TX 76252 | Oil & Gas Operator | Feb 2026 |
| 17 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Feb 2026 |
| 18 | HGN Operating Company, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2014 |
| 19 | HGN Operating I, LLC | Abilene, TX 79604 | Oil & Gas Operator | Feb 2026 |
| 20 | Hickory Petroleum Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jun 2013 |
| 21 | Hillside Oil & Gas, LLC | Midland, TX 79708 | Oil & Gas Operator | Apr 2016 |
| 22 | Hofco, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Feb 2026 |
| 23 | Holden Oil & Gas | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 24 | Holson Well Service | Albany, TX 76430 | Oil & Gas Operator | Feb 2026 |
| 25 | Hooks & Hooks | Abilene, TX 79608 | Oil & Gas Operator | Feb 1999 |
| 26 | Horizon Well Services, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Feb 2026 |
| 27 | Horn Energy | Eastland, TX 76448 | Oil & Gas Operator | Feb 2026 |
| 28 | Hovgard & Fitzgerald | Abilene, TX 79608 | Oil & Gas Operator | Mar 1996 |
| 29 | Howle Operating Account, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 1999 |
| 30 | Howle, A.G. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2011 |
| 31 | Hudson Brothers Mining Co., Inc. | Cisco, TX 76437 | Oil & Gas Operator | Jun 1994 |
| 32 | Hughes, Bob Oil Company | San Angelo, TX 76901 | Oil & Gas Operator | Jul 2011 |
| 33 | Humphrey-Bashford Oil, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Sep 2010 |
| 34 | Hunt Operating, LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Feb 2026 |
| 35 | Hunter Oil & Gas Co. | Bangs, TX 76823 | Oil & Gas Operator | Feb 2026 |