| 12801 | Heritage Exploration LLC | Oklahoma City, OK 73120-5622 | Oil & Gas Operator | Jan 2020 |
| 12802 | Heritage Oil Company Inc | Norman, OK 73070 | Oil & Gas Operator | Jul 2008 |
| 12803 | Heritage Oil L.L.C. | Hays, KS 67601 | Oil Operator | Dec 2025 |
| 12804 | Heritage Operating Co., Inc. The | Stafford, TX 77497 | Oil & Gas Operator | May 1997 |
| 12805 | Heritage Petroleum Corporation | Cleburne, TX 76033 | Oil & Gas Operator | May 2026 |
| 12806 | Heritage Petroleum, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | May 2026 |
| 12807 | Heritage Resources, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Feb 2014 |
| 12808 | Heritage Standard Corporation | Dallas, TX 75206 | Oil & Gas Operator | May 2026 |
| 12809 | Herley Olive Holdings LLC | | Oil & Gas Operator | Mar 2026 |
| 12810 | Herley Petroleum | | Oil & Gas Operator | Dec 1997 |
| 12811 | Herley-Kelley LLC | | Oil & Gas Operator | Mar 2026 |
| 12812 | Herlihy John D. | | Oil & Gas Operator | May 1997 |
| 12813 | Herlin Et Al | | Oil & Gas Operator | Mar 1985 |
| 12814 | Herlindah Gallegos | | Oil Operator | Dec 2007 |
| 12815 | Herman Fields | | Oil & Gas Operator | May 1989 |
| 12816 | Herman J Ledbetter | Abilene, TX 79606 | Oil & Gas Operator | Jul 1999 |
| 12817 | Herman Krug - Oil Operations | | Oil Operator | Dec 2025 |
| 12818 | Herman L Loeb | Lawrenceville, IL 62439 | Oil & Gas Operator | Jul 2009 |
| 12819 | Herman L. Loeb LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Dec 2025 |
| 12820 | Herman Lang Oil And Gas Co. | | Oil & Gas Operator | Dec 1992 |
| 12821 | Herman Riemer Gas Co | Sarver, PA 16055-8507 | Oil & Gas Operator | Dec 2016 |
| 12822 | Herman V Wallis | Kerrville, TX 780281858 | Gas Operator | Feb 2003 |
| 12823 | Herman'S Supply Company | West Seneca, NY 14224 | Gas Operator | Dec 2024 |
| 12824 | Hermat Salt Water Disposal, Inc. | Corpus Chrsti, TX 78426 | Oil Operator | Aug 2012 |
| 12825 | Hermes, A. J. | Lindsay, TX 76250 | Oil & Gas Operator | Mar 2018 |
| 12826 | Hermreck Oil Com | | Oil & Gas Operator | Aug 1996 |
| 12827 | Hermreck Oil Company | | Oil Operator | Oct 2025 |
| 12828 | Herms, Walter | Luling, TX 78648 | Oil & Gas Operator | Sep 2002 |
| 12829 | Herod, Bill | Ranger, TX 76470 | Oil & Gas Operator | Apr 2022 |
| 12830 | Heron Operating, LLC | | Oil & Gas Operator | Feb 2026 |
| 12831 | Herricks Oil Co. | San Angelo, TX 76906 | Oil & Gas Operator | Jan 2010 |
| 12832 | Herring Production Co | | Oil & Gas Operator | Mar 1992 |
| 12833 | Herring, Casey Oil Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Nov 2008 |
| 12834 | Herring, D Oil & Gas Co. | Santa Anna, TX 76878 | Oil & Gas Operator | May 2026 |
| 12835 | Herring, Ray | Graham, TX 76450 | Oil & Gas Operator | Jul 2014 |
| 12836 | Herrman & Ikenberry | Cushing, OK 74023-0247 | Oil & Gas Operator | Dec 2003 |
| 12837 | Herrmann Arnold | Chandler, OK 74834 | Oil & Gas Operator | Sep 2024 |
| 12838 | Herrmann Energy | Amarillo, TX 79159 | Oil & Gas Operator | May 2015 |
| 12839 | Herrmann J B Oil And Gas | Amarillo, TX 79159-0670 | Oil & Gas Operator | Feb 2015 |
| 12840 | Herrmann, J.B. | Amarillo, TX 79159 | Oil & Gas Operator | Aug 2019 |
| 12841 | Herrmann, S. W. Oil & Gas | Amarillo, TX 79159 | Oil & Gas Operator | May 2026 |
| 12842 | Herschap Bros. | Bruni, TX 78344 | Oil & Gas Operator | May 2026 |
| 12843 | Hershey Oil | Pasadena, CA 91103 | Oil & Gas Operator | Dec 1988 |
| 12844 | Hershey Oil Corporation | | Oil & Gas Operator | Jul 1992 |
| 12845 | Hertel Oil Company | | Oil Operator | Nov 2018 |
| 12846 | Hertel Oil Company LLC | Hays, KS 67601 | Oil Operator | Dec 2025 |
| 12847 | Herv Oil, LLC | Oklahoma City, OK 73116 | Oil Operator | Feb 2026 |
| 12848 | Herzfeld Fabricators Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2017 |
| 12849 | Hesperus Energy II LLC | | Oil Operator | Dec 2025 |
| 12850 | Hess Bakken Investments II, LLC | | Oil & Gas Operator | Feb 2026 |
| 12851 | Hess Bros. DRLG. Co. | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2008 |
| 12852 | Hess Co2 Resources LLC | Seminole, TX 79360 | Gas Operator | Aug 2017 |
| 12853 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 12854 | Hess Corporation, A De Corp. | | Oil & Gas Operator | Oct 2006 |
| 12855 | Hess Ohio Developments LLC | Houston, TX 77010 | Oil & Gas Operator | Sep 2018 |
| 12856 | Hess Ohio Resources LLC | Houston, TX 77010 | Oil & Gas Operator | Jun 2014 |
| 12857 | Hess Oil Company | McPherson, KS 67460 | Oil & Gas Operator | Dec 2025 |
| 12858 | Hess Production | Quitaque, TX 79255 | Oil & Gas Operator | May 2026 |
| 12859 | Hess Seminole Assets LLC | Seminole, TX 79360 | Oil & Gas Operator | Aug 2017 |
| 12860 | Hess, Jay E. | Andover, NY 14806 | Oil & Gas Operator | Dec 2024 |
| 12861 | Hess, Jerry Operating Co. | Muenster, TX 76252 | Oil & Gas Operator | May 2026 |
| 12862 | Hesse Petroleum Co.,L.L.C. | Wichita, KS 67208 | Oil & Gas Operator | Nov 2025 |
| 12863 | Hessert Edward C | | Oil & Gas Operator | Sep 1993 |
| 12864 | Hessert Loc Inc | Carl Junction, MO 64834 | Oil Operator | Dec 2009 |
| 12865 | Hester Jr J C | Lawton, OK 73502-1887 | Oil & Gas Operator | Oct 1997 |
| 12866 | Heston Oil Company | Tulsa, OK 74108 | Oil & Gas Operator | Mar 2005 |
| 12867 | Hett Oil & Gas, LLC | Lincolnville, KS 66858 | Oil & Gas Operator | Dec 2025 |
| 12868 | Heuston Oil LLC | Bartlesville, OK 74006 | Oil & Gas Operator | Apr 2020 |
| 12869 | Hewitt Energy Group Inc | Salt Lake City, UT 84111 | Oil & Gas Operator | Apr 2015 |
| 12870 | Hewitt Oil, LLC | Bolivar, NY 14715 | Oil & Gas Operator | Dec 2024 |
| 12871 | Hewitt, Alan P. | Midland, TX 79702 | Oil & Gas Operator | Aug 1997 |
| 12872 | Hewitt, Douglas R | | Oil Operator | Nov 2025 |
| 12873 | Hewitt, Robert J. | Victoria, TX 77901 | Oil & Gas Operator | Jun 2004 |
| 12874 | Hexadyne Energy Corp. | | Oil & Gas Operator | Dec 2013 |
| 12875 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | May 2026 |
| 12876 | Hexp Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | May 2026 |
| 12877 | Heydrick Petroleum Company | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2026 |
| 12878 | Hez Petroleum Company | Graham, TX 76450 | Oil & Gas Operator | May 2026 |
| 12879 | HG Energy II Appalachia, LLC | | Oil & Gas Operator | Mar 2022 |
| 12880 | HG Energy LLC | Parkersburg, WV 26101 | Oil & Gas Operator | Dec 2021 |
| 12881 | HG Oil Holdings, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Dec 2025 |
| 12882 | HG Operating LLC | Plano, TX 75026 | Oil & Gas Operator | May 2026 |
| 12883 | HGH Energy, Inc. | | Oil & Gas Operator | Jun 2001 |
| 12884 | Hgi Corporation | Nada, TX 77460 | Oil & Gas Operator | Apr 2016 |
| 12885 | HGN Operating Company, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2014 |
| 12886 | HGN Operating I, LLC | Abilene, TX 79604 | Oil & Gas Operator | May 2026 |
| 12887 | HHH & G Oil Co | Owasso, OK 74055 | Oil Operator | Jun 2020 |
| 12888 | HHL Development Inc | Garber, OK 73738 | Oil & Gas Operator | Feb 2026 |
| 12889 | Hi - Mountain Energy Corporation | Odessa, TX 79762 | Oil & Gas Operator | May 2026 |
| 12890 | Hi Plains Hydrocarbons, Inc. | Sunray, TX 79086 | Oil & Gas Operator | Oct 2002 |
| 12891 | Hi Snyder/Snyder Oil & Gas Inc | Dover, OH 44622 | Oil & Gas Operator | Dec 2019 |
| 12892 | Hi-Kat Petroleum | | Oil Operator | Mar 1990 |
| 12893 | Hi-Kat Petroleum Company | Liberal, KS 67905-1261 | Oil & Gas Operator | May 2014 |
| 12894 | Hi-Mi Exploration, LLC | Alvaton, KY 42122 | Oil & Gas Operator | Dec 2022 |
| 12895 | Hi-Pro Production | Gillette, WY 82717 | Gas Operator | Nov 2003 |
| 12896 | Hiawatha Exploration Company | Oklahoma City, OK 73116-7326 | Oil & Gas Operator | Mar 2009 |
| 12897 | Hibbard Energy, LP | Whitehouse, TX 75791 | Oil & Gas Operator | May 2026 |
| 12898 | Hibbard-Frost-Smith | | Oil & Gas Operator | Apr 1990 |
| 12899 | Hibbert R E Estate Of | Houston, TX 77002-3211 | Oil & Gas Operator | Apr 2015 |
| 12900 | Hibernia Resources III, LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2023 |