| 1 | H & S Oil LLC | Roswell, NM 882022387 | Oil & Gas Operator | Jul 2013 |
| 2 | H & S Production | Farmington, NM 87401 | Oil Operator | Dec 2007 |
| 3 | H K Keesee And C J Keesee Trust | Farmington, NM 87499 | Gas Operator | Oct 2025 |
| 4 | H L Brown Jr | Midland, TX 79702 | Oil & Gas Operator | May 2001 |
| 5 | H L Brown Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 6 | Hadaway Consulting And Engineering LLC | Canadian, TX 79014 | Oil & Gas Operator | Sep 2025 |
| 7 | Haile Petroleum LTD | Artesia, NM 882110186 | Oil & Gas Operator | Aug 2000 |
| 8 | Hal J Rasmussen Oper Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2014 |
| 9 | Halcon Holdings Inc | Ada, OK 74820 | Oil & Gas Operator | Jul 2025 |
| 10 | Hall Energy Co. | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2016 |
| 11 | Hallador Petroleum LLP | Denver, CO 80264 | Oil & Gas Operator | Feb 2019 |
| 12 | Hamon Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Dec 2011 |
| 13 | Hanagan Petroleum Corp | Roswell, NM 88201 | Oil & Gas Operator | Sep 1999 |
| 14 | Hanley Petroleum Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2017 |
| 15 | Hanson Energy | Glencoe, NM 88324 | Oil & Gas Operator | Jul 2008 |
| 16 | Hanson Operating Company Inc | Roswell, NM 88202 | Oil & Gas Operator | Jul 2025 |
| 17 | Harken Southwest Corp | Dallas, TX 752612007 | Oil & Gas Operator | Feb 2001 |
| 18 | Harkey Energy Inc. | Odessa, TX 79762 | Oil & Gas Operator | Feb 2020 |
| 19 | Harlow Corporation, The | Amarillo, TX 79101 | Oil & Gas Operator | Apr 2014 |
| 20 | Harlow Enterprises LLC | Artesia, NM 88210 | Oil & Gas Operator | Sep 2025 |
| 21 | Harris & Walton | Midland, TX 79702 | Oil & Gas Operator | Feb 2004 |
| 22 | Hart Oil & Gas Inc | Houston, TX 77024 | Oil & Gas Operator | Jan 2017 |
| 23 | Harvard Petroleum Company, LLC | Roswell, NM 88202 | Oil & Gas Operator | Dec 2025 |
| 24 | Harvest Energy Company | Englewood, CO 80110 | Oil & Gas Operator | Jun 1997 |
| 25 | Harvest Petroleum Partners, LLC | Midland, TX 79705 | Oil & Gas Operator | Sep 2025 |
| 26 | Harvey E Yates Company | Roswell, NM 88202 | Oil & Gas Operator | Feb 2015 |
| 27 | Havenor Operating Co | Roswell, NM 88201 | Oil & Gas Operator | Jun 2018 |
| 28 | Hawkins Oil & Gas Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2016 |
| 29 | Headington Oil Company LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2016 |
| 30 | Hec Petroleum, Inc | Midland, TX 79705 | Oil & Gas Operator | Mar 2006 |
| 31 | Helemrich & Payne Inc | Iraan, TX 79744 | Oil & Gas Operator | Sep 2002 |
| 32 | Henry Petroleum LP | Midland, TX 79701 | Oil & Gas Operator | Dec 2008 |
| 33 | Heritage Resources, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Feb 2014 |
| 34 | Heritage Standard Corporation | Dallas, TX 75206 | Oil & Gas Operator | Dec 2025 |
| 35 | Herman J Ledbetter | Abilene, TX 79606 | Oil & Gas Operator | Jul 1999 |
| 36 | Herman L Loeb | Lawrenceville, IL 62439 | Oil & Gas Operator | Jul 2009 |
| 37 | Herman L. Loeb LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Jun 2025 |
| 38 | Herman V Wallis | Kerrville, TX 780281858 | Gas Operator | Feb 2003 |
| 39 | Hess Co2 Resources LLC | Seminole, TX 79360 | Gas Operator | Aug 2017 |
| 40 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 41 | Hexp Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 42 | Hi - Mountain Energy Corporation | Odessa, TX 79762 | Oil & Gas Operator | Dec 2025 |
| 43 | Hicks Oil & Gas Inc | Farmington, NM 87499 | Oil & Gas Operator | Oct 2012 |
| 44 | High Plains Petroleum Corp | Boulder, CO 80305 | Oil & Gas Operator | Jan 2021 |
| 45 | High River Resources Operating, LLC | Farmington, NM 87401 | Oil & Gas Operator | Sep 2025 |
| 46 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Dec 2025 |
| 47 | Hillin Prod. Co. | Odessa, TX 79760 | Oil & Gas Operator | Apr 2002 |
| 48 | Hillside Oil & Gas, LLC | Midland, TX 79708 | Oil & Gas Operator | Apr 2016 |
| 49 | HK Energy Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2023 |
| 50 | Holcomb Oil & Gas Inc | Farmington, NM 87401 | Oil & Gas Operator | Sep 2025 |
| 51 | Holden Energy Corporation | Ardmore, OK 73401 | Oil & Gas Operator | Mar 2015 |
| 52 | Hondo Drilling Company | Midland, TX 79702 | Oil & Gas Operator | Nov 1996 |
| 53 | Hope Oil Inc | Midland, TX 79702 | Oil & Gas Operator | Oct 2021 |
| 54 | Horizon Natural Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Oct 2024 |
| 55 | Horizon Oil & Gas Co. | Dallas, TX 75221 | Oil & Gas Operator | Jan 2005 |
| 56 | Horseshoe Operating Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 2023 |
| 57 | Hpoc, LLC | Cuba, NM 87013 | Oil Operator | Mar 2025 |
| 58 | HPPC, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 59 | HRC Inc | Hobbs, NM 88241 | Gas Operator | Jun 2017 |
| 60 | HS Resources | Tulsa, OK 74136 | Oil & Gas Operator | Aug 1997 |
| 61 | Hudson Oil Company Of Texas | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 62 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 63 | Hunt Cimarron Limited Partnership | Roswell, NM 88202 | Oil & Gas Operator | Oct 2025 |
| 64 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |
| 65 | Hunt Petroleum, Inc. | Houston, TX 772511350 | Oil & Gas Operator | Nov 2002 |
| 66 | Huntington Energy LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Dec 2025 |