| 801 | Hennessey Oil & Gas LLC | Hennessey, OK 73742-0212 | Oil & Gas Operator | Sep 2024 |
| 802 | Hennessy Oil Com | | Oil Operator | Mar 1991 |
| 803 | Hennig Production Co., Inc. | Tyler, TX 75701 | Oil & Gas Operator | Jul 2026 |
| 804 | Henrich, Adam Gabriel | Eden, NY 14057 | Gas Operator | Dec 2025 |
| 805 | Henrich, John W. | Eden, NY 14057 | Gas Operator | Dec 2025 |
| 806 | Henry And Jane Fong | | Oil Operator | Dec 1989 |
| 807 | Henry Billy Or Connie | Okemah, OK 74859-6075 | Oil & Gas Operator | Jul 2021 |
| 808 | Henry Gungoll Operating Inc | Enid, OK 73703 | Oil & Gas Operator | May 2026 |
| 809 | Henry Oil & Gas Inc | Oklahoma City, OK 73127 | Oil & Gas Operator | Jul 2009 |
| 810 | Henry Patrick K | | Oil & Gas Operator | Dec 2025 |
| 811 | Henry Paul Petroleum, LLC | Pampa, TX 79066 | Oil & Gas Operator | Jul 2026 |
| 812 | Henry Petroleum Corp. | Midland, TX 79703 | Oil & Gas Operator | Mar 2001 |
| 813 | Henry Petroleum Inc | Oklahoma City, OK 73162-1757 | Oil & Gas Operator | Sep 2019 |
| 814 | Henry Petroleum LLC | Flower Mound, TX 75028 | Oil & Gas Operator | Jul 2026 |
| 815 | Henry Petroleum LP | Midland, TX 79701 | Oil & Gas Operator | Dec 2008 |
| 816 | Henry Petroleum Of Oklahoma LP | Midland, TX 79703-5000 | Oil & Gas Operator | Feb 2017 |
| 817 | Henry Production Company, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Oct 2019 |
| 818 | Henry Rennick | | Oil Operator | Apr 2026 |
| 819 | Henry Resources LLC | Midland, TX 79703 | Oil & Gas Operator | Jul 2026 |
| 820 | Henry Sappington Machine & Tool Dba Henry Sappingt | | Oil Operator | Oct 2017 |
| 821 | Henry W. Agle And Sons, Inc. | Eden, NY 14057 | Gas Operator | Dec 2025 |
| 822 | Henry Wat Oil Company | Tulsa, OK 74101 | Oil Operator | Jan 2014 |
| 823 | Henry, J.R. Inc | Brenham, TX 77833 | Oil & Gas Operator | Jul 2026 |
| 824 | Henry, John Petroleum | Dallas, TX 75225 | Oil & Gas Operator | Dec 2001 |
| 825 | Henscheid, Rufus | Muenster, TX 76252 | Oil Operator | Jan 2020 |
| 826 | Hensley Oil Company LLC | Arkansas City, KS 67005 | Oil Operator | Mar 2026 |
| 827 | Hensley, Cloide J. & Hazel M. | Arkansas City, KS 67005 | Oil Operator | Sep 2001 |
| 828 | Henson Doyle | Okmulgee, OK 74447-4841 | Oil & Gas Operator | Jun 2020 |
| 829 | Henson Exploration, L.P. | Abilene, TX 79608 | Oil & Gas Operator | Jul 2026 |
| 830 | Henson Terry Dba Daycon Exploration | Tulsa, OK 74133 | Oil & Gas Operator | Mar 2026 |
| 831 | Hep Oil Company, LTD. | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2012 |
| 832 | Hep Oil GP, LLC | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |
| 833 | Herald Oil & Gas Co | Middleport, OH 45760-9000 | Oil & Gas Operator | Dec 2010 |
| 834 | Herbaly Petroleum Corp | FT Worth, TX 76102 | Oil & Gas Operator | Feb 2002 |
| 835 | Herber, Carl R. | Denton, TX 76205 | Oil & Gas Operator | Apr 2014 |
| 836 | Herbert J. Schmitz | | Oil & Gas Operator | Dec 1987 |
| 837 | Herbig Oil & Gas Co. | Midland, TX 79705 | Oil & Gas Operator | Jul 2026 |
| 838 | Herbig, J F | Midland, TX 79701 | Oil & Gas Operator | Mar 1998 |
| 839 | Herbst Resources, Inc. | Mandeville, LA 70448 | Oil & Gas Operator | Aug 2003 |
| 840 | Herd Producing Company, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Jul 2026 |
| 841 | Hereford Resources, LLC | Chester, MT 59522 | Gas Operator | May 2026 |
| 842 | Hereford, J. A. Industries, Inc. | Nacogdoches, TX 75961 | Oil & Gas Operator | Jul 2026 |
| 843 | Herencia Operating LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Jul 2026 |
| 844 | Heritage Energy Company | | Oil & Gas Operator | Jun 2001 |
| 845 | Heritage Energy Corporation | Waco, TX 76710 | Oil & Gas Operator | Sep 2004 |
| 846 | Heritage Expl. & Prod. Co., Inc. | Stafford, TX 77497 | Oil & Gas Operator | Dec 2000 |
| 847 | Heritage Exploration LLC | Oklahoma City, OK 73120-5622 | Oil & Gas Operator | Jan 2020 |
| 848 | Heritage Oil Company Inc | Norman, OK 73070 | Oil & Gas Operator | Jul 2008 |
| 849 | Heritage Oil L.L.C. | Hays, KS 67601 | Oil Operator | Mar 2026 |
| 850 | Heritage Operating Co., Inc. The | Stafford, TX 77497 | Oil & Gas Operator | May 1997 |
| 851 | Heritage Petroleum Corporation | Cleburne, TX 76033 | Oil & Gas Operator | Jul 2026 |
| 852 | Heritage Petroleum, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Jul 2026 |
| 853 | Heritage Resources, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Feb 2014 |
| 854 | Heritage Standard Corporation | Dallas, TX 75206 | Oil & Gas Operator | Jul 2026 |
| 855 | Herley Olive Holdings LLC | | Oil & Gas Operator | May 2026 |
| 856 | Herley Petroleum | | Oil & Gas Operator | Dec 1997 |
| 857 | Herley-Kelley LLC | | Oil & Gas Operator | May 2026 |
| 858 | Herlihy John D. | | Oil & Gas Operator | May 1997 |
| 859 | Herlin Et Al | | Oil & Gas Operator | Mar 1985 |
| 860 | Herlindah Gallegos | | Oil Operator | Dec 2007 |
| 861 | Herman Fields | | Oil & Gas Operator | May 1989 |
| 862 | Herman J Ledbetter | Abilene, TX 79606 | Oil & Gas Operator | Jul 1999 |
| 863 | Herman Krug - Oil Operations | | Oil Operator | Mar 2026 |
| 864 | Herman L Loeb | Lawrenceville, IL 62439 | Oil & Gas Operator | Jul 2009 |
| 865 | Herman L. Loeb LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Mar 2026 |
| 866 | Herman Lang Oil And Gas Co. | | Oil & Gas Operator | Dec 1992 |
| 867 | Herman Riemer Gas Co | Sarver, PA 16055-8507 | Oil & Gas Operator | Dec 2016 |
| 868 | Herman V Wallis | Kerrville, TX 780281858 | Gas Operator | Feb 2003 |
| 869 | Hermat Salt Water Disposal, Inc. | Corpus Chrsti, TX 78426 | Oil Operator | Aug 2012 |
| 870 | Hermes, A. J. | Lindsay, TX 76250 | Oil & Gas Operator | Mar 2018 |
| 871 | Hermreck Oil Com | | Oil & Gas Operator | Aug 1996 |
| 872 | Hermreck Oil Company | | Oil Operator | Oct 2025 |
| 873 | Herms, Walter | Luling, TX 78648 | Oil & Gas Operator | Sep 2002 |
| 874 | Herod, Bill | Ranger, TX 76470 | Oil & Gas Operator | Apr 2022 |
| 875 | Heron Operating, LLC | | Oil & Gas Operator | Apr 2026 |
| 876 | Herricks Oil Co. | San Angelo, TX 76906 | Oil & Gas Operator | Jan 2010 |
| 877 | Herring Production Co | | Oil & Gas Operator | Mar 1992 |
| 878 | Herring, Casey Oil Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Nov 2008 |
| 879 | Herring, D Oil & Gas Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Jul 2026 |
| 880 | Herring, Ray | Graham, TX 76450 | Oil & Gas Operator | Jul 2014 |
| 881 | Herrman & Ikenberry | Cushing, OK 74023-0247 | Oil & Gas Operator | Dec 2003 |
| 882 | Herrmann Arnold | Chandler, OK 74834 | Oil & Gas Operator | Sep 2024 |
| 883 | Herrmann Energy | Amarillo, TX 79159 | Oil & Gas Operator | May 2015 |
| 884 | Herrmann J B Oil And Gas | Amarillo, TX 79159-0670 | Oil & Gas Operator | Feb 2015 |
| 885 | Herrmann, J.B. | Amarillo, TX 79159 | Oil & Gas Operator | Aug 2019 |
| 886 | Herrmann, S. W. Oil & Gas | Amarillo, TX 79159 | Oil & Gas Operator | Jul 2026 |
| 887 | Herschap Bros. | Bruni, TX 78344 | Oil & Gas Operator | Jul 2026 |
| 888 | Hershey Oil | Pasadena, CA 91103 | Oil & Gas Operator | Dec 1988 |
| 889 | Hershey Oil Corporation | | Oil & Gas Operator | Jul 1992 |
| 890 | Hertel Oil Company | | Oil Operator | Jan 2026 |
| 891 | Hertel Oil Company LLC | Hays, KS 67601 | Oil Operator | Mar 2026 |
| 892 | Herv Oil, LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | May 2026 |
| 893 | Herzfeld Fabricators Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2017 |
| 894 | Hesperus Energy II LLC | | Oil Operator | Jan 2026 |
| 895 | Hesperus Energy LLC | | Oil Operator | Dec 2025 |
| 896 | Hess Bakken Investments II, LLC | | Oil & Gas Operator | May 2026 |
| 897 | Hess Bros. DRLG. Co. | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2008 |
| 898 | Hess Co2 Resources LLC | Seminole, TX 79360 | Gas Operator | Aug 2017 |
| 899 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 900 | Hess Corporation, A De Corp. | | Oil & Gas Operator | Oct 2006 |