| 801 | Helmcamp, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2002 |
| 802 | Helmco LTD | Kiefer, OK 74041-0397 | Oil & Gas Operator | Jan 2007 |
| 803 | Helmco Production Company | Pawhuska, OK 74056 | Oil Operator | Aug 2000 |
| 804 | Helmer Energy & Stanton Engr. | Tyler, TX 75702 | Oil & Gas Operator | Jun 1998 |
| 805 | Helmer Oil Corporation | | Oil & Gas Operator | Nov 2025 |
| 806 | Helmer, Bonnie J | | Oil Operator | Nov 2025 |
| 807 | Helmerich & Payn | | Oil & Gas Operator | Aug 1995 |
| 808 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Nov 2025 |
| 809 | Helmhold Oil Incorporated | Wellsville, NY 14895 | Oil Operator | Dec 2024 |
| 810 | Helms Oil | Brinkhaven, OH 43006 | Oil Operator | Dec 2018 |
| 811 | Helms Oil & Gas, LLC | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 812 | Helo Energy, Inc. | Borger, TX 79008 | Oil & Gas Operator | Aug 2001 |
| 813 | Helsel, Allan J | South Haven, KS 67140 | Oil Operator | Aug 2025 |
| 814 | Helton Oil Company | Edmond, OK 73083-7283 | Oil & Gas Operator | Aug 2016 |
| 815 | Helton Petroleum | Pampa, TX 79066 | Oil & Gas Operator | Feb 2026 |
| 816 | Helton, Pat A. & Alberta | Allison, TX 79003 | Oil & Gas Operator | Feb 2026 |
| 817 | Hembree Alva | Oklahoma City, OK 73151-9145 | Oil & Gas Operator | Jun 2016 |
| 818 | Hembree Brit W | Shawnee, OK 74802-1725 | Oil & Gas Operator | Nov 2025 |
| 819 | Hembree Oil Production, LLC | Great Bend, KS 67530 | Oil Operator | Sep 2025 |
| 820 | Hembree Robert F | | Oil Operator | Dec 2009 |
| 821 | Hemco Development, LLC | Dallas, TX 75201 | Oil & Gas Operator | Nov 2020 |
| 822 | Hemco Production, L. L. C. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2016 |
| 823 | Hemenger Daniel A | Erie, PA 16510-2035 | Gas Operator | Dec 2025 |
| 824 | Hemstead Oil Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2001 |
| 825 | Hemus, Inc. | Bellaire, TX 77401 | Oil & Gas Operator | Sep 1994 |
| 826 | Henderson & Erickson, Inc. | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 827 | Henderson Charles E | Bokoshe, OK 74930 | Gas Operator | Oct 2021 |
| 828 | Henderson Don Inc | Oklahoma City, OK 73134-1753 | Oil & Gas Operator | Aug 2013 |
| 829 | Henderson Exploration Company | Tulsa, OK 74120 | Oil & Gas Operator | May 2013 |
| 830 | Henderson Fred J | Okmulgee, OK 74447 | Oil & Gas Operator | Nov 2025 |
| 831 | Henderson Gerald D | Watonga, OK 73772 | Gas Operator | Mar 2014 |
| 832 | Henderson Natural Res, L.L.C. | Crozet, VA 22932 | Oil & Gas Operator | Feb 2026 |
| 833 | Henderson Oil & Gas | | Oil Operator | Sep 1990 |
| 834 | Henderson Operating LLC | Oklahoma City, OK 73107-5321 | Oil & Gas Operator | Mar 2015 |
| 835 | Henderson Pet Corp Of Delaware | | Oil & Gas Operator | Oct 2019 |
| 836 | Henderson Petroleum Corp | San Angelo, TX 76906 | Oil & Gas Operator | Jul 2013 |
| 837 | Henderson Russell C | Henryetta, OK 74437-0083 | Gas Operator | May 2013 |
| 838 | Henderson, Bryan, Co. | Dallas, TX 75225 | Oil & Gas Operator | Feb 2026 |
| 839 | Henderson, Chris | Pawhuska, OK 74056 | Oil Operator | Dec 2009 |
| 840 | Henderson, David Malcolm & Georgina Hewlett | Hancock, MD 21750 | Oil Operator | Dec 2023 |
| 841 | Henderson, Peter Oil Co. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2020 |
| 842 | Henderson, Sam F. | Odessa, TX 79760 | Oil & Gas Operator | Nov 2002 |
| 843 | Henderson, Sam W. | Iowa Park, TX 76367 | Oil & Gas Operator | Jun 2019 |
| 844 | Hendon WM E. Jr. Rev LVNG Trust | Everett, WA 98208 | Oil & Gas Operator | Feb 2026 |
| 845 | Hendrickson Lester | Delaware, OK 74027-9715 | Oil Operator | Mar 2015 |
| 846 | Hendrickson W R | Beggs, OK 74421-2936 | Oil & Gas Operator | Jun 2023 |
| 847 | Hendrickson, James W., Dba Dinad Development Company | Harrisville, WV 26362 | Oil & Gas Operator | Dec 2016 |
| 848 | Hendrix, John H. Corporation | Midland, TX 79705 | Oil & Gas Operator | Sep 2018 |
| 849 | Hendry Energy Services | | Oil Operator | Dec 2024 |
| 850 | Henergy Oil & Gas LLC | | Oil Operator | Jan 2025 |
| 851 | Henke, Elden H. | Lost Springs, KS 66859 | Oil & Gas Operator | Feb 1996 |
| 852 | Henley Operating | Nocona, TX 76255 | Oil & Gas Operator | Feb 2026 |
| 853 | Henley, VIola F | | Oil Operator | Nov 2025 |
| 854 | Hennan Resources, Inc. | Great Neck, NY 11021 | Gas Operator | Nov 1997 |
| 855 | Hennessey Oil & Gas LLC | Hennessey, OK 73742-0212 | Oil & Gas Operator | Sep 2024 |
| 856 | Hennessy Oil Com | | Oil Operator | Mar 1991 |
| 857 | Hennig Production Co., Inc. | Tyler, TX 75701 | Oil & Gas Operator | Feb 2026 |
| 858 | Henrich, Adam Gabriel | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 859 | Henrich, John W. | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 860 | Henry And Jane Fong | | Oil Operator | Dec 1989 |
| 861 | Henry Billy Or Connie | Okemah, OK 74859-6075 | Oil & Gas Operator | Jul 2021 |
| 862 | Henry Gungoll Operating Inc | Enid, OK 73703 | Oil & Gas Operator | Dec 2025 |
| 863 | Henry Oil & Gas Inc | Oklahoma City, OK 73127 | Oil & Gas Operator | Jul 2009 |
| 864 | Henry Patrick K | Chicora, PA 16025-4502 | Oil & Gas Operator | Dec 2025 |
| 865 | Henry Paul Petroleum, LLC | Pampa, TX 79066 | Oil & Gas Operator | Feb 2026 |
| 866 | Henry Petroleum Corp. | Midland, TX 79703 | Oil & Gas Operator | Mar 2001 |
| 867 | Henry Petroleum Inc | Oklahoma City, OK 73162-1757 | Oil & Gas Operator | Sep 2019 |
| 868 | Henry Petroleum LLC | Flower Mound, TX 75028 | Oil & Gas Operator | Feb 2026 |
| 869 | Henry Petroleum LP | Midland, TX 79701 | Oil & Gas Operator | Dec 2008 |
| 870 | Henry Petroleum Of Oklahoma LP | Midland, TX 79703-5000 | Oil & Gas Operator | Feb 2017 |
| 871 | Henry Production Company, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Oct 2019 |
| 872 | Henry Rennick | | Oil Operator | Nov 2025 |
| 873 | Henry Resources LLC | Midland, TX 79703 | Oil & Gas Operator | Dec 2024 |
| 874 | Henry Sappington Machine & Tool Dba Henry Sappingt | | Oil Operator | Oct 2017 |
| 875 | Henry W. Agle And Sons, Inc. | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 876 | Henry Wat Oil Company | Tulsa, OK 74101 | Oil Operator | Jan 2014 |
| 877 | Henry, J.R. Inc | Brenham, TX 77833 | Oil & Gas Operator | Feb 2026 |
| 878 | Henry, John Petroleum | Dallas, TX 75225 | Oil & Gas Operator | Dec 2001 |
| 879 | Henscheid, Rufus | Muenster, TX 76252 | Oil Operator | Jan 2020 |
| 880 | Hensley Oil Company LLC | Arkansas City, KS 67005 | Oil Operator | Sep 2025 |
| 881 | Hensley, Cloide J. & Hazel M. | Arkansas City, KS 67005 | Oil Operator | Sep 2001 |
| 882 | Henson Doyle | Okmulgee, OK 74447-4841 | Oil & Gas Operator | Jun 2020 |
| 883 | Henson Exploration, L.P. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2026 |
| 884 | Henson Terry Dba Daycon Exploration | Tulsa, OK 74133 | Oil & Gas Operator | Nov 2025 |
| 885 | Hep Oil Company, LTD. | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2012 |
| 886 | Hep Oil GP, LLC | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |
| 887 | Herald Oil & Gas Co | Middleport, OH 45760-9000 | Oil & Gas Operator | Dec 2010 |
| 888 | Herbaly Petroleum Corp | FT Worth, TX 76102 | Oil & Gas Operator | Feb 2002 |
| 889 | Herber, Carl R. | Denton, TX 76205 | Oil & Gas Operator | Apr 2014 |
| 890 | Herbert A Thomas | Cambridge Springs, PA 16403-2555 | Gas Operator | Dec 2025 |
| 891 | Herbert J. Schmitz | | Oil & Gas Operator | Dec 1987 |
| 892 | Herbig Oil & Gas Co. | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 893 | Herbig, J F | Midland, TX 79701 | Oil & Gas Operator | Mar 1998 |
| 894 | Herbst Resources, Inc. | Mandeville, LA 70448 | Oil & Gas Operator | Aug 2003 |
| 895 | Herco Exploration LLC | Billings, MT 59103 | Gas Operator | Oct 2024 |
| 896 | Herd Producing Company, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Feb 2026 |
| 897 | Hereford, J. A. Industries, Inc. | Nacogdoches, TX 75961 | Oil & Gas Operator | Feb 2026 |
| 898 | Herencia Operating LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Feb 2026 |
| 899 | Heritage Energy Company | | Oil & Gas Operator | Jun 2001 |
| 900 | Heritage Energy Corporation | Waco, TX 76710 | Oil & Gas Operator | Sep 2004 |