| 801 | Hemstead Oil Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2001 |
| 802 | Hemus, Inc. | Bellaire, TX 77401 | Oil & Gas Operator | Sep 1994 |
| 803 | Henderson & Erickson, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 804 | Henderson Charles E | Bokoshe, OK 74930 | Gas Operator | Oct 2021 |
| 805 | Henderson Don Inc | Oklahoma City, OK 73134-1753 | Oil & Gas Operator | Aug 2013 |
| 806 | Henderson Exploration Company | Tulsa, OK 74120 | Oil & Gas Operator | May 2013 |
| 807 | Henderson Fred J | Okmulgee, OK 74447 | Oil & Gas Operator | Aug 2025 |
| 808 | Henderson Natural Res, L.L.C. | Crozet, VA 22932 | Oil & Gas Operator | Dec 2025 |
| 809 | Henderson Oil & Gas | | Oil Operator | Sep 1990 |
| 810 | Henderson Pet Corp Of Delaware | | Oil & Gas Operator | Oct 2019 |
| 811 | Henderson Petroleum Corp | San Angelo, TX 76906 | Oil & Gas Operator | Jul 2013 |
| 812 | Henderson, Bryan, Co. | Dallas, TX 75225 | Oil & Gas Operator | Dec 2025 |
| 813 | Henderson, Chris | Pawhuska, OK 74056 | Oil Operator | Dec 2009 |
| 814 | Henderson, David Malcolm & Georgina Hewlett | Hancock, MD 21750 | Oil Operator | Dec 2023 |
| 815 | Henderson, Peter Oil Co. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2020 |
| 816 | Henderson, Sam F. | Odessa, TX 79760 | Oil & Gas Operator | Nov 2002 |
| 817 | Henderson, Sam W. | Iowa Park, TX 76367 | Oil & Gas Operator | Jun 2019 |
| 818 | Hendon WM E. Jr. Rev LVNG Trust | Everett, WA 98208 | Oil & Gas Operator | Dec 2025 |
| 819 | Hendrickson Lester | Delaware, OK 74027-9715 | Oil Operator | Mar 2015 |
| 820 | Hendrickson W R | Beggs, OK 74421-2936 | Oil & Gas Operator | Jun 2023 |
| 821 | Hendrix, John H. Corporation | Midland, TX 79705 | Oil & Gas Operator | Sep 2018 |
| 822 | Hendry Energy Services | | Oil Operator | Dec 2024 |
| 823 | Henergy Oil & Gas LLC | | Oil Operator | Jan 2025 |
| 824 | Henley Operating | Nocona, TX 76255 | Oil & Gas Operator | Dec 2025 |
| 825 | Henley, VIola F | | Oil Operator | Aug 2025 |
| 826 | Hennan Resources, Inc. | Great Neck, NY 11021 | Gas Operator | Nov 1997 |
| 827 | Hennessey Oil & Gas LLC | Hennessey, OK 73742-0212 | Oil & Gas Operator | Sep 2024 |
| 828 | Hennessy Oil Com | | Oil Operator | Mar 1991 |
| 829 | Hennig Production Co., Inc. | Tyler, TX 75701 | Oil & Gas Operator | Dec 2025 |
| 830 | Henrich, Adam Gabriel | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 831 | Henrich, John W. | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 832 | Henry And Jane Fong | | Oil Operator | Dec 1989 |
| 833 | Henry Billy Or Connie | Okemah, OK 74859-6075 | Oil & Gas Operator | Jul 2021 |
| 834 | Henry Gungoll Operating Inc | Enid, OK 73703 | Oil & Gas Operator | Sep 2025 |
| 835 | Henry Oil & Gas Inc | Oklahoma City, OK 73127 | Oil & Gas Operator | Jul 2009 |
| 836 | Henry Patrick K | Chicora, PA 16025-4502 | Oil & Gas Operator | Dec 2024 |
| 837 | Henry Paul Petroleum, LLC | Pampa, TX 79066 | Oil & Gas Operator | Dec 2025 |
| 838 | Henry Petroleum Corp. | Midland, TX 79703 | Oil & Gas Operator | Mar 2001 |
| 839 | Henry Petroleum Inc | Oklahoma City, OK 73162-1757 | Oil & Gas Operator | Sep 2019 |
| 840 | Henry Petroleum LLC | Flower Mound, TX 75028 | Oil & Gas Operator | Dec 2025 |
| 841 | Henry Petroleum LP | Midland, TX 79701 | Oil & Gas Operator | Dec 2008 |
| 842 | Henry Petroleum Of Oklahoma LP | Midland, TX 79703-5000 | Oil & Gas Operator | Feb 2017 |
| 843 | Henry Production Company, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Oct 2019 |
| 844 | Henry Rennick | | Oil Operator | Aug 2025 |
| 845 | Henry Resources LLC | Midland, TX 79703 | Oil & Gas Operator | Dec 2024 |
| 846 | Henry Sappington Machine & Tool Dba Henry Sappingt | | Oil Operator | Oct 2017 |
| 847 | Henry W. Agle And Sons, Inc. | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 848 | Henry Wat Oil Company | Tulsa, OK 74101 | Oil Operator | Jan 2014 |
| 849 | Henry, J.R. Inc | Brenham, TX 77833 | Oil & Gas Operator | Dec 2025 |
| 850 | Henry, John Petroleum | Dallas, TX 75225 | Oil & Gas Operator | Dec 2001 |
| 851 | Henscheid, Rufus | Muenster, TX 76252 | Oil Operator | Jan 2020 |
| 852 | Hensley Oil Company LLC | Arkansas City, KS 67005 | Oil Operator | Jun 2025 |
| 853 | Hensley, Cloide J. & Hazel M. | Arkansas City, KS 67005 | Oil Operator | Sep 2001 |
| 854 | Henson Doyle | Okmulgee, OK 74447-4841 | Oil & Gas Operator | Jun 2020 |
| 855 | Henson Exploration, L.P. | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 856 | Henson Terry Dba Daycon Exploration | Tulsa, OK 74133 | Oil & Gas Operator | Jul 2025 |
| 857 | Hep Oil Company, LTD. | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2012 |
| 858 | Hep Oil GP, LLC | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |
| 859 | Herald Oil & Gas Co | Middleport, OH 45760-9000 | Oil & Gas Operator | Dec 2010 |
| 860 | Herbaly Petroleum Corp | FT Worth, TX 76102 | Oil & Gas Operator | Feb 2002 |
| 861 | Herber, Carl R. | Denton, TX 76205 | Oil & Gas Operator | Apr 2014 |
| 862 | Herbert J. Schmitz | | Oil & Gas Operator | Dec 1987 |
| 863 | Herbig Oil & Gas Co. | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 864 | Herbig, J F | Midland, TX 79701 | Oil & Gas Operator | Mar 1998 |
| 865 | Herbst Resources, Inc. | Mandeville, LA 70448 | Oil & Gas Operator | Aug 2003 |
| 866 | Herco Exploration LLC | Billings, MT 59103 | Gas Operator | Oct 2024 |
| 867 | Herd Producing Company, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Dec 2025 |
| 868 | Hereford, J. A. Industries, Inc. | Nacogdoches, TX 75961 | Oil & Gas Operator | Dec 2025 |
| 869 | Herencia Operating LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 2025 |
| 870 | Heritage Energy Company | | Oil & Gas Operator | Jun 2001 |
| 871 | Heritage Energy Corporation | Waco, TX 76710 | Oil & Gas Operator | Sep 2004 |
| 872 | Heritage Expl. & Prod. Co., Inc. | Stafford, TX 77497 | Oil & Gas Operator | Dec 2000 |
| 873 | Heritage Exploration LLC | Oklahoma City, OK 73120-5622 | Oil & Gas Operator | Jan 2020 |
| 874 | Heritage Gas Corporation | Shreveport, LA 71101 | Gas Operator | Aug 1997 |
| 875 | Heritage Oil Company Inc | Norman, OK 73070 | Oil & Gas Operator | Jul 2008 |
| 876 | Heritage Oil L.L.C. | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 877 | Heritage Operating Co., Inc. The | Stafford, TX 77497 | Oil & Gas Operator | May 1997 |
| 878 | Heritage Petroleum Corporation | Cleburne, TX 76033 | Oil & Gas Operator | Dec 2025 |
| 879 | Heritage Petroleum, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Dec 2025 |
| 880 | Heritage Resources, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Feb 2014 |
| 881 | Heritage Standard Corporation | Dallas, TX 75206 | Oil & Gas Operator | Dec 2025 |
| 882 | Herley Olive Holdings LLC | | Oil & Gas Operator | Oct 2025 |
| 883 | Herley Petroleum | | Oil & Gas Operator | Dec 1997 |
| 884 | Herley-Kelley LLC | | Oil & Gas Operator | Oct 2025 |
| 885 | Herlihy John D. | | Oil & Gas Operator | May 1997 |
| 886 | Herlin Et Al | | Oil & Gas Operator | Mar 1985 |
| 887 | Herlindah Gallegos | | Oil Operator | Dec 2007 |
| 888 | Herman Fields | | Oil & Gas Operator | May 1989 |
| 889 | Herman J Ledbetter | Abilene, TX 79606 | Oil & Gas Operator | Jul 1999 |
| 890 | Herman Krug - Oil Operations | | Oil Operator | Jun 2025 |
| 891 | Herman L Loeb | Lawrenceville, IL 62439 | Oil & Gas Operator | Jul 2009 |
| 892 | Herman L. Loeb LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Jun 2025 |
| 893 | Herman Lang Oil And Gas Co. | | Oil & Gas Operator | Dec 1992 |
| 894 | Herman Riemer Gas Co | Sarver, PA 16055-8507 | Oil & Gas Operator | Dec 2016 |
| 895 | Herman V Wallis | Kerrville, TX 780281858 | Gas Operator | Feb 2003 |
| 896 | Herman'S Supply Company | West Seneca, NY 14224 | Gas Operator | Dec 2024 |
| 897 | Hermat Salt Water Disposal, Inc. | Corpus Chrsti, TX 78426 | Oil Operator | Aug 2012 |
| 898 | Hermes, A. J. | Lindsay, TX 76250 | Oil & Gas Operator | Mar 2018 |
| 899 | Hermreck Oil Com | | Oil & Gas Operator | Aug 1996 |
| 900 | Hermreck Oil Company | | Oil Operator | Nov 2024 |