| 12701 | Hart Oil, LLC | | Oil Operator | Dec 2014 |
| 12702 | Hart Petroleum Services, Inc | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Jul 2025 |
| 12703 | Hart, Nick And Connie | Paola, KS 66071 | Oil Operator | Sep 2025 |
| 12704 | Hartco Oil Co. | | Oil Operator | Jan 2025 |
| 12705 | Hartel, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Aug 1997 |
| 12706 | Harter Energy Inc | Tulsa, OK 74105 | Oil & Gas Operator | Dec 2025 |
| 12707 | Harter Oil Company | | Oil & Gas Operator | Apr 2011 |
| 12708 | Harter, Ron | Midland, TX 79702 | Oil & Gas Operator | Mar 2026 |
| 12709 | Hartley Natural Resource Development | | Oil & Gas Operator | Dec 2025 |
| 12710 | Hartline Tom | Drumright, OK 74030 | Oil Operator | Nov 2025 |
| 12711 | Hartman Oil And Gas Company | | Oil Operator | Dec 1998 |
| 12712 | Hartman Oil Company Inc | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 12713 | Hartman W L Trus | | Oil Operator | Jun 1992 |
| 12714 | Hartoil Corporation | Post, TX 79356 | Oil & Gas Operator | Mar 2026 |
| 12715 | Harus Inc | Indiana, PA 15701-9401 | Oil & Gas Operator | Dec 2025 |
| 12716 | Harvard Investments, Inc. | | Oil & Gas Operator | Oct 2002 |
| 12717 | Harvard Petroleum Company, LLC | Roswell, NM 88202 | Oil & Gas Operator | Mar 2026 |
| 12718 | Harvard Petroleum Corporation | Roswell, NM 88201 | Oil & Gas Operator | Dec 2004 |
| 12719 | Harvest (Us) Holdings, Inc | Houston, TX 77077 | Oil & Gas Operator | Apr 2011 |
| 12720 | Harvest Energy Company | Englewood, CO 80110 | Oil & Gas Operator | Jun 1997 |
| 12721 | Harvest Oil & Gas, LLC | | Oil & Gas Operator | Feb 2012 |
| 12722 | Harvest Operating Company, Inc. | Cisco, TX 76437 | Oil & Gas Operator | Dec 1997 |
| 12723 | Harvest Petroleum Inc. | Frisco, TX 75033 | Oil & Gas Operator | Mar 2026 |
| 12724 | Harvest Petroleum Partners LLC | Midland, TX 79705 | Oil & Gas Operator | Mar 2026 |
| 12725 | Harvey A B | Seminole, OK 74868-1724 | Oil Operator | Mar 2015 |
| 12726 | Harvey Brothers Oil & Gas | Corpus Chrsti, TX 78408 | Oil & Gas Operator | Jul 2004 |
| 12727 | Harvey Broyles | | Oil & Gas Operator | May 2012 |
| 12728 | Harvey Broyles & Munoco Co. | | Oil & Gas Operator | Jan 2002 |
| 12729 | Harvey Broyles, Et Al | | Gas Operator | Nov 1985 |
| 12730 | Harvey E Yates Company | Roswell, NM 88202 | Oil & Gas Operator | Feb 2015 |
| 12731 | Harvey, James W. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2008 |
| 12732 | Harvey, Mike W. Oil & Gas | Corpus Chrsti, TX 78408 | Oil & Gas Operator | Aug 2003 |
| 12733 | Harvey, Robert E., Jr. | Nixon, TX 78140 | Oil & Gas Operator | Oct 2003 |
| 12734 | Harvick Oil Co. | Albany, TX 76430 | Oil & Gas Operator | Feb 2009 |
| 12735 | Harvick, George R. | Albany, TX 76430 | Oil & Gas Operator | Mar 2026 |
| 12736 | Harwell Enterprises | Loveland, CO 80537 | Gas Operator | Nov 2019 |
| 12737 | Harwell Enterprises Inc. | Weatherford, TX 76086 | Oil & Gas Operator | Jan 2005 |
| 12738 | Harwood Exploration, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Aug 1995 |
| 12739 | Harwood Oil & Gas Inc | Greeley, CO 80631-8233 | Oil & Gas Operator | Dec 2025 |
| 12740 | Hasada Industrie | | Oil & Gas Operator | Jul 1995 |
| 12741 | Haskit, Kendall | Kyle, TX 78640 | Oil & Gas Operator | Mar 2026 |
| 12742 | Hassie Hunt Expl. Co. | | Oil & Gas Operator | Aug 2008 |
| 12743 | Hasso Energy LLC | | Oil & Gas Operator | Jan 2026 |
| 12744 | Hastings, J. W. Oil Co. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2010 |
| 12745 | Hat Creek Cattle Company, A General Partnership | Paola, KS 66071 | Oil Operator | Aug 2016 |
| 12746 | Hat Creek Energy LLC | Denver, CO 80209 | Oil & Gas Operator | Jun 2019 |
| 12747 | Hat Oil & Gas, Inc. | Slaton, TX 79364 | Oil & Gas Operator | Feb 2002 |
| 12748 | Hat-Top Production Co | Duncan, OK 73533 | Oil Operator | Apr 2011 |
| 12749 | Hatch, Jeffrey And Chelsea | Bemus Point, NY 14712 | Gas Operator | Dec 2024 |
| 12750 | Hatcher, Ray | Burkburnett, TX 76354 | Oil & Gas Operator | Jun 2002 |
| 12751 | Hatco Productions LTD | North Augusta, SC 29860 | Oil Operator | Dec 2024 |
| 12752 | Hathaway Company | | Oil & Gas Operator | Dec 2025 |
| 12753 | Hathaway LLC | | Oil & Gas Operator | Dec 2025 |
| 12754 | Hatler Oil Company, Inc. | Graham, TX 76450 | Oil & Gas Operator | Sep 2000 |
| 12755 | Hatley Delbert Jr Dba DH Enterprises | Oklahoma City, OK 73129 | Oil & Gas Operator | Jan 2026 |
| 12756 | Haug Lawrence | Kimball, NE 69145 | Oil & Gas Operator | Jul 2007 |
| 12757 | Haught Energy Corporation | Smithville, WV 26178-7004 | Oil & Gas Operator | Dec 2021 |
| 12758 | Haught Harold | Hominy, OK 74035 | Oil Operator | Feb 2012 |
| 12759 | Haught, Glenn L. & Sons | | Oil & Gas Operator | Dec 1997 |
| 12760 | Haught, Inc. | Smithville, WV 26178 | Oil & Gas Operator | Nov 2021 |
| 12761 | Haul-Pac, Inc. | Hiawatha, KS 66434 | Oil Operator | Aug 2025 |
| 12762 | Haussler Farms Inc. | | Oil Operator | Dec 1992 |
| 12763 | Haven Oil & Gas | Hutchinson, KS 67504 | Oil & Gas Operator | Mar 2009 |
| 12764 | Havenor Operating Co | Roswell, NM 88201 | Oil & Gas Operator | Jun 2018 |
| 12765 | Havens Oil Company | Early, TX 76803 | Oil & Gas Operator | Dec 2025 |
| 12766 | Haverkamp, Floyd | Muenster, TX 76252 | Oil & Gas Operator | Oct 2001 |
| 12767 | Havins Energy | Burkburnett, TX 76354 | Oil & Gas Operator | May 2006 |
| 12768 | Havoco Inc | Newcastle, WY 82701 | Oil & Gas Operator | Aug 2005 |
| 12769 | Haw Corporation | | Oil Operator | Dec 1979 |
| 12770 | Hawk Exploration And Production | Corpus Chrsti, TX 78412 | Oil & Gas Operator | Oct 1995 |
| 12771 | Hawk Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Aug 2003 |
| 12772 | Hawk Petroleum, L L C | San Diego, TX 78384 | Oil & Gas Operator | Mar 2026 |
| 12773 | Hawk Well Service | Borger, TX 79007 | Oil & Gas Operator | Mar 2026 |
| 12774 | Hawk, Lisa | Fredonia, NY 14063 | Gas Operator | Dec 2024 |
| 12775 | Hawk-Hill Operating Company, LLC | Plano, TX 75093 | Oil & Gas Operator | Jun 2009 |
| 12776 | Hawkbend LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2026 |
| 12777 | Hawke Inc | Barbertib, OH 44203 | Oil & Gas Operator | Dec 2024 |
| 12778 | Hawkeye Drilling Co. | Waskom, TX 75692 | Oil & Gas Operator | Feb 2023 |
| 12779 | Hawkeye Oil | | Oil & Gas Operator | Jun 2007 |
| 12780 | Hawkeye Oil & Gas, Inc. | | Gas Operator | Jun 1995 |
| 12781 | Hawkeye Transmission Company | Dallas, TX 75244 | Oil & Gas Operator | Jun 2000 |
| 12782 | Hawkins & Hawkins | Council Hill, OK 74428 | Oil & Gas Operator | Jul 1996 |
| 12783 | Hawkins & Son Inc | Boynton, OK 74422 | Oil & Gas Operator | Aug 2019 |
| 12784 | Hawkins Energy Corporation | Austin, TX 78711 | Oil & Gas Operator | Apr 1997 |
| 12785 | Hawkins Oil & Ga | | Oil & Gas Operator | Jun 1995 |
| 12786 | Hawkins Oil & Gas Company | Richardson, TX 75080 | Oil & Gas Operator | Mar 2026 |
| 12787 | Hawkins Oil & Gas Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2016 |
| 12788 | Hawkins Oil Of Michigan Inc | | Oil & Gas Operator | Aug 2003 |
| 12789 | Hawkins Oil, L.L.C. | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2025 |
| 12790 | Hawkins, B. O. | Aspermont, TX 79502 | Oil & Gas Operator | Mar 2026 |
| 12791 | Hawkins, Blanche | Clay City, KY 40312 | Oil Operator | Dec 2023 |
| 12792 | Hawkins, G. A. | Graham, TX 76450 | Oil & Gas Operator | Dec 2013 |
| 12793 | Hawkins, James F. | Tulsa, OK 74103 | Oil Operator | Dec 2019 |
| 12794 | Hawkins, Robert S. | Kevin, MT 59454 | Oil Operator | Jun 2018 |
| 12795 | Hawks Company | Casper, WY 82602 | Oil & Gas Operator | Apr 2007 |
| 12796 | Hawks Industries Inc | Casper, WY 82601 | Oil & Gas Operator | Jun 1993 |
| 12797 | Hawkwood Energy Operating, LLC | Houston, TX 77224 | Oil & Gas Operator | Apr 2022 |
| 12798 | Hawley & Desimon | Conrad, MT 59425 | Oil Operator | Nov 2025 |
| 12799 | Hawley Hydrocarbons, Merrill&Carol Hawley Dba | Great Falls, MT 59405 | Oil Operator | Dec 2025 |
| 12800 | Hawley Oil Company | Great Falls, MT 59405-5156 | Oil Operator | Nov 2025 |