| 2701 | Hays Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2000 |
| 2702 | Hays Production LLC | Velma, OK 73491 | Oil & Gas Operator | Jan 2025 |
| 2703 | Hays Stanley L | Wynola, OK 74084 | Oil Operator | May 2022 |
| 2704 | Hazelwood Louis J | Albuquerque, NM 87111-6870 | Oil & Gas Operator | Feb 2023 |
| 2705 | Hazelwood Prod & Exp Co LLC | Oklahoma City, OK 73116-9037 | Oil & Gas Operator | Dec 2024 |
| 2706 | Hazen Oil Company | Cleveland, OK 74020-9633 | Oil Operator | Jul 2020 |
| 2707 | Hazlewood Oil & Gas Co Inc | Oklahoma City, OK 73139-9353 | Oil & Gas Operator | Apr 2022 |
| 2708 | HB Oil Company | Abilene, TX 79602 | Oil & Gas Operator | Jun 2023 |
| 2709 | HCG Energy Corporation & Subs | | Oil & Gas Operator | Mar 2015 |
| 2710 | HCL Inc | Woodward, OK 73802-1074 | Oil Operator | Mar 2015 |
| 2711 | HCM | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 2712 | Headington Energy Corporation | Dallas, TX 75231 | Oil & Gas Operator | Aug 1992 |
| 2713 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 2714 | Headington Oil Company LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2016 |
| 2715 | Heak Operating LLC | Hominy, OK 74035 | Oil Operator | Dec 2024 |
| 2716 | Heartland Environmental Services | Watonga, OK 73080 | Oil & Gas Operator | May 1999 |
| 2717 | Heartland Exploration | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2000 |
| 2718 | Heartland Exploration Inc | Edmond, OK 73013 | Oil & Gas Operator | Dec 2015 |
| 2719 | Heartland Pumping | Hennessey, OK 73742-7311 | Oil & Gas Operator | Dec 2024 |
| 2720 | Heartlands Development Co Inc | Bristow, OK 74010-3826 | Oil & Gas Operator | May 2017 |
| 2721 | Heat Waves Hot Oil Service LLC | Denver, CO 80202 | Oil Operator | Jun 2011 |
| 2722 | Heath B M | | Oil & Gas Operator | Feb 1994 |
| 2723 | Heath Jack A | Tulsa, OK 74132-2403 | Oil & Gas Operator | Jan 2013 |
| 2724 | Heath Oil Co., Inc. | Washington, OK 73093-4702 | Oil & Gas Operator | Dec 2024 |
| 2725 | Heaton Everill L | Exeter, CA 93221-2340 | Oil & Gas Operator | Sep 2014 |
| 2726 | Hegco Canada Inc | | Oil & Gas Operator | Nov 2003 |
| 2727 | Heights Energy Corporation | Plano, TX 75026 | Oil & Gas Operator | Mar 2025 |
| 2728 | Heinrich Production Co Inc | Lubbuck, TX 79424 | Oil Operator | Dec 2024 |
| 2729 | Helena Resources LLC | Helena, OK 73741-4120 | Oil & Gas Operator | Dec 2024 |
| 2730 | Helke Exploration Company | Oklahoma City, OK 73112-7201 | Oil & Gas Operator | Feb 2000 |
| 2731 | Hellard Elmer J | Sapulpa, OK 74066 | Oil & Gas Operator | Jan 2025 |
| 2732 | Heller, Phillip & Charlene | Columbia, MO 65201 | Oil & Gas Operator | Dec 2024 |
| 2733 | Helmco LTD | Kiefer, OK 74041-0397 | Oil & Gas Operator | Jan 2007 |
| 2734 | Helmco Production Company | Pawhuska, OK 74056 | Oil Operator | Aug 2000 |
| 2735 | Helmer Bonnie Jean Revocable Trust | Pawhuska, OK 74056 | Oil Operator | Dec 2024 |
| 2736 | Helmer Oil Corporation | Pawhuska, OK 74056 | Oil & Gas Operator | Dec 2024 |
| 2737 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Nov 2024 |
| 2738 | Helton Oil Company | Edmond, OK 73083-7283 | Oil & Gas Operator | Aug 2016 |
| 2739 | Hembree Alva | Oklahoma City, OK 73151-9145 | Oil & Gas Operator | Jun 2016 |
| 2740 | Hembree Brit W | Shawnee, OK 74802-1725 | Oil & Gas Operator | Oct 2024 |
| 2741 | Hemstead Oil Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2001 |
| 2742 | Henderson Art | Pawhuska, OK 74056 | Oil & Gas Operator | May 2014 |
| 2743 | Henderson Charles E | Bokoshe, OK 74930 | Gas Operator | Oct 2021 |
| 2744 | Henderson Don Inc | Oklahoma City, OK 73134-1753 | Oil & Gas Operator | Aug 2013 |
| 2745 | Henderson Exploration Company | Tulsa, OK 74120 | Oil & Gas Operator | May 2013 |
| 2746 | Henderson Fred J | Okmulgee, OK 74447-9204 | Oil & Gas Operator | Dec 2024 |
| 2747 | Henderson Operating Co Inc | | Oil & Gas Operator | Nov 2003 |
| 2748 | Hendrickson Lester | Delaware, OK 74027-9715 | Oil Operator | Mar 2015 |
| 2749 | Hendrickson W R | Beggs, OK 74421-2936 | Oil & Gas Operator | Jun 2023 |
| 2750 | Henley Dean | Pawhuska, OK 74056 | Oil Operator | Dec 2024 |
| 2751 | Hennessey Oil & Gas LLC | Hennessey, OK 73742-0212 | Oil & Gas Operator | Sep 2024 |
| 2752 | Henry Billy Or Connie | Okemah, OK 74859-6075 | Oil & Gas Operator | Jul 2021 |
| 2753 | Henry Gungoll Operating Inc | Enid, OK 73703 | Oil & Gas Operator | Jan 2025 |
| 2754 | Henry Oil & Gas Inc | Oklahoma City, OK 73127 | Oil & Gas Operator | Jul 2009 |
| 2755 | Henry Petroleum Inc | Oklahoma City, OK 73162-1757 | Oil & Gas Operator | Sep 2019 |
| 2756 | Henry Petroleum Of Oklahoma LP | Midland, TX 79703-5000 | Oil & Gas Operator | Feb 2017 |
| 2757 | Henry Wat Oil Company | Tulsa, OK 74101 | Oil Operator | Jan 2014 |
| 2758 | Henson Doyle | Okmulgee, OK 74447-4841 | Oil & Gas Operator | Jun 2020 |
| 2759 | Henson Terry Dba Daycon Exploration | Tulsa, OK 74137-3546 | Oil & Gas Operator | Dec 2024 |
| 2760 | Hep Oil Company LTD | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2012 |
| 2761 | Hep Oil GP, LLC | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |
| 2762 | Heritage Exploration LLC | Oklahoma City, OK 73120-5622 | Oil & Gas Operator | Jan 2020 |
| 2763 | Heritage Oil Company | Norman, OK 73070 | Oil & Gas Operator | Jul 2008 |
| 2764 | Heritage Petroleum, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Mar 2025 |
| 2765 | Herrman & Ikenberry | Cushing, OK 74023-0247 | Oil & Gas Operator | Dec 2003 |
| 2766 | Herrmann Arnold | Chandler, OK 74834 | Oil & Gas Operator | Sep 2024 |
| 2767 | Herrmann J B Oil And Gas | Amarillo, TX 79159-0670 | Oil & Gas Operator | Feb 2015 |
| 2768 | Herv Oil, LLC | Oklahoma City, OK 73116 | Oil Operator | Jan 2025 |
| 2769 | Herzfeld Fabricators Inc | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2017 |
| 2770 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 2771 | Hester Jr J C | Lawton, OK 73502-1887 | Oil & Gas Operator | Oct 1997 |
| 2772 | Heston Oil Company | Tulsa, OK 74108 | Oil & Gas Operator | Mar 2005 |
| 2773 | Heuston Oil LLC | Bartlesville, OK 74006 | Oil & Gas Operator | Apr 2020 |
| 2774 | Hewitt Doug | Hominy, OK 74035 | Oil Operator | Jul 2024 |
| 2775 | Hewitt Energy Group, Inc. | Salt Lake City, UT 84111 | Oil & Gas Operator | Apr 2015 |
| 2776 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Mar 2025 |
| 2777 | HGN Operating Co Inc | Abilene, TX 79604 | Oil & Gas Operator | Jul 2014 |
| 2778 | HHH & G Oil Co | Owasso, OK 74055 | Oil Operator | Jun 2020 |
| 2779 | HHL Development Inc | Garber, OK 73738 | Oil & Gas Operator | Dec 2024 |
| 2780 | Hi-Kat Petroleum Company | Liberal, KS 67905-1261 | Oil & Gas Operator | May 2014 |
| 2781 | Hiawatha Exploration Company | Oklahoma City, OK 73116-7326 | Oil & Gas Operator | Mar 2009 |
| 2782 | Hibbert R E Estate Of | Houston, TX 77002-3211 | Oil & Gas Operator | Apr 2015 |
| 2783 | High Energy | Cushing, OK 74023 | Oil & Gas Operator | Dec 2024 |
| 2784 | High McDonald Operating Co | Norman, OK 73072-7607 | Oil Operator | Dec 2024 |
| 2785 | High Sierra Crude Oil& Marketing LLC | Ardmore, OK 73401 | Oil Operator | Nov 2013 |
| 2786 | High Sierra Water Services Mid Continent LLC | Denver, CO 80209 | Oil Operator | Feb 2010 |
| 2787 | Highfill Bob W | Claremore, OK 74018-2595 | Oil Operator | Jun 2005 |
| 2788 | Highland Energy Co | Dallas, TX 75201 | Oil & Gas Operator | Jun 1994 |
| 2789 | Highland Minerals, Inc. | Tulsa, OK 74145-7627 | Oil & Gas Operator | Apr 2015 |
| 2790 | Highland Oil & Gas LLC | Houston, TX 77079-7220 | Oil & Gas Operator | Feb 2015 |
| 2791 | Highmark Energy Operating, LLC | Poynor, TX 75782 | Oil & Gas Operator | Mar 2025 |
| 2792 | Highmount Operating LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2014 |
| 2793 | Hightower Energy LLC | Cushing, OK 74023-6370 | Oil & Gas Operator | Dec 2024 |
| 2794 | Hightower Oil & Gas | Cairo, IL 62914-0401 | Oil Operator | Nov 2014 |
| 2795 | Highway 15 SWD LLC | Shattuck, OK 73858 | Oil Operator | Oct 2021 |
| 2796 | Highway 60 SWD LLC | Shattuck, OK 73858-0848 | Oil Operator | Jul 2019 |
| 2797 | Hikcott Oil | Wilson, OK 73463-6537 | Oil Operator | Jan 2014 |
| 2798 | Hiland Energy LP | Enid, OK 73701-0032 | Oil & Gas Operator | Dec 2022 |
| 2799 | Hill Gilford | Stroud, OK 74079-9401 | Oil & Gas Operator | May 2013 |
| 2800 | Hill John H | Dallas, TX 75240-7077 | Oil & Gas Operator | Jul 2015 |