| 1 | H L Brown Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2024 |
| 2 | H. L. Brown, Jr. | Midland, TX 79702 | Oil & Gas Operator | May 2001 |
| 3 | Hal J Rasmussen Oper Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2014 |
| 4 | Halcon Holdings, Inc. | Ada, OK 74820 | Oil & Gas Operator | Nov 2018 |
| 5 | Hallador Petroleum LLP | Denver, CO 80264 | Oil & Gas Operator | Feb 2019 |
| 6 | Hanley Petroleum Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2017 |
| 7 | Hanson Operating Company Inc | Roswell, NM 88202 | Oil & Gas Operator | Sep 2024 |
| 8 | Harkey Energy Inc. | Odessa, TX 79762 | Oil & Gas Operator | Feb 2020 |
| 9 | Harris & Walton | Midland, TX 79702 | Oil & Gas Operator | Feb 2004 |
| 10 | Harvard Petroleum Company, LLC | Roswell, NM 88202 | Oil & Gas Operator | Dec 2024 |
| 11 | Harvest Petroleum Partners, LLC | Midland, TX 79705 | Oil & Gas Operator | Sep 2024 |
| 12 | Harvey E Yates Company | Roswell, NM 88202 | Oil & Gas Operator | Feb 2015 |
| 13 | Hawkins Oil & Gas Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2016 |
| 14 | Headington Oil Company LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2016 |
| 15 | Hec Petroleum, Inc | Midland, TX 79705 | Oil & Gas Operator | Mar 2006 |
| 16 | Helemrich & Payne Inc | Iraan, TX 79744 | Oil & Gas Operator | Sep 2002 |
| 17 | Henry Petroleum LP | Midland, TX 79701 | Oil & Gas Operator | Dec 2008 |
| 18 | Heritage Resources, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Feb 2014 |
| 19 | Heritage Standard Corporation | Dallas, TX 75206 | Oil & Gas Operator | Dec 2024 |
| 20 | Herman J Ledbetter | Abilene, TX 79606 | Oil & Gas Operator | Jul 1999 |
| 21 | Herman L Loeb | Lawrenceville, IL 62439 | Oil & Gas Operator | Jul 2009 |
| 22 | Herman L. Loeb, LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Aug 2024 |
| 23 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 24 | Hexp Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Dec 2024 |
| 25 | HK Energy Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2023 |
| 26 | Hondo Drilling Company | Midland, TX 79702 | Oil & Gas Operator | Nov 1996 |
| 27 | Hope Oil Inc | Midland, TX 79702 | Oil & Gas Operator | Oct 2021 |
| 28 | Horizon Oil & Gas Co. | Dallas, TX 75221 | Oil & Gas Operator | Jan 2005 |
| 29 | Horseshoe Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 2023 |
| 30 | HPPC, Inc. | Midland, TX 79701 | Oil & Gas Operator | Feb 2023 |
| 31 | HRC Inc | Hobbs, NM 88241 | Gas Operator | Jun 2017 |
| 32 | Hudson Oil Company Of Texas | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2024 |
| 33 | Hunt Cimarron Limited Partnership | Roswell, NM 882021592 | Oil & Gas Operator | Oct 2024 |
| 34 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Dec 2024 |
| 35 | Hunt Petroleum, Inc. | Houston, TX 772511350 | Oil & Gas Operator | Nov 2002 |