| 2701 | Horizon Oil & Gas Co. | Dallas, TX 75221 | Oil & Gas Operator | Jan 2005 |
| 2702 | Horizon Resources Inc | Fort Worth, TX 76101-1978 | Oil & Gas Operator | Jul 2006 |
| 2703 | Horn Eddie L Dba B & E Investments | Bristow, OK 74010 | Oil & Gas Operator | Dec 2025 |
| 2704 | Horn Oil Company | Bristow, OK 74010 | Oil & Gas Operator | Jan 2026 |
| 2705 | Horn R L & Sons Drilling | | Oil Operator | Jun 1997 |
| 2706 | Horn, Henry L | | Oil Operator | Apr 2009 |
| 2707 | Horseshoe Oil Co | Cromwell, OK 74837 | Oil & Gas Operator | Dec 2021 |
| 2708 | Horton Mary | Ratliff City, OK 73481 | Oil Operator | May 2020 |
| 2709 | Horton Oil Company | Independence, KS 67301 | Oil & Gas Operator | Jul 2000 |
| 2710 | Hosco Operating Inc | Seminole, OK 74868-2447 | Oil & Gas Operator | Aug 2017 |
| 2711 | Hotulke Construction LLC | Seminole, OK 74868 | Oil & Gas Operator | Jan 2026 |
| 2712 | Hough Oil And Gas | Hominy, OK 74035 | Oil Operator | Jan 2026 |
| 2713 | Houseco Petroleum Inc | Bristow, OK 74010-0842 | Oil & Gas Operator | Aug 2002 |
| 2714 | Houston Exploration Co, The | Houston, TX 77002 | Oil & Gas Operator | Apr 2017 |
| 2715 | Howard & Taylor | Wynnewood, OK 73098 | Oil & Gas Operator | Jan 2026 |
| 2716 | Howco Oil And Gas | Stroud, OK 74079-9604 | Oil & Gas Operator | Mar 2015 |
| 2717 | Howden Petroleum Corp | Wetumka, OK 74883 | Gas Operator | Nov 1997 |
| 2718 | Howell Bill J | Calvin, OK 74531-0248 | Oil & Gas Operator | Sep 2016 |
| 2719 | Howell C W | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2015 |
| 2720 | Howell Jason | Wynona, OK 74084 | Oil Operator | Jan 2026 |
| 2721 | Howell'S Well Service, Inc. | | Oil & Gas Operator | Jan 2026 |
| 2722 | Hoyt John C | Bartlesville, OK 74005-1316 | Oil Operator | Feb 2000 |
| 2723 | Hoyt Oil & Gas LLC | Cushing, OK 74023-0442 | Oil & Gas Operator | Dec 2025 |
| 2724 | HPC Incorporated | Denver, CO 80202 | Oil & Gas Operator | Nov 1998 |
| 2725 | HRB Operating Company, Inc. | Bridgeport, TX 76426 | Oil & Gas Operator | May 2026 |
| 2726 | HRC Production Co | Houston, TX 77024 | Oil & Gas Operator | Feb 2026 |
| 2727 | HRF Exploration & Production LLC | Gaylord, MI 49734-0160 | Gas Operator | May 2026 |
| 2728 | Hsumy Oil & Gas, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2007 |
| 2729 | Hub-Hill Inc | San Antonio, TX 78230 | Oil Operator | Nov 1998 |
| 2730 | Huber Energy Panhandle LP | Houston, TX 77079 | Oil & Gas Operator | Oct 2005 |
| 2731 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | May 2026 |
| 2732 | Huck Farms LLC | Stratford, OK 74872 | Oil & Gas Operator | Dec 2025 |
| 2733 | Hudgens Lester E | Bartlesville, OK 74006-0215 | Oil Operator | Mar 2015 |
| 2734 | Hudson Energy LLC | | Oil Operator | Dec 2025 |
| 2735 | Hughes Drilling Co Inc | Enid, OK 73702 | Oil & Gas Operator | Apr 1998 |
| 2736 | Hughes Gas Systems LLC | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Jan 2026 |
| 2737 | Hughes George B | Asher, OK 74826-0165 | Oil & Gas Operator | Mar 2011 |
| 2738 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 2739 | Huitt Joe A | Tulsa, OK 74103 | Oil & Gas Operator | May 2001 |
| 2740 | Huitt Joe A Rev Trust | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2009 |
| 2741 | Hulen Operating Company | Nichols Hill, OK 73116 | Oil & Gas Operator | May 2026 |
| 2742 | Hull Enterprises Inc | Broken Arrow, OK 74012 | Oil & Gas Operator | Sep 2023 |
| 2743 | Hull Oil Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2021 |
| 2744 | Hulse Steve & Frank | Pawhuska, OK 74056 | Oil & Gas Operator | Aug 2000 |
| 2745 | Hulsey Larry O & Co | Graham, TX 76046 | Oil & Gas Operator | Jun 2012 |
| 2746 | Humphrey Mark | Morris, OK 74445-2816 | Oil & Gas Operator | Sep 2021 |
| 2747 | Hungerford Oil & Gas Inc | Helena, OK 73741 | Oil & Gas Operator | Nov 2000 |
| 2748 | Hunt Brothers Producing Co Inc | Redding, CA 96049-2516 | Oil & Gas Operator | Sep 2012 |
| 2749 | Hunt Chris Water Hauling Contractor Inc | Keyes, OK 73947-0004 | Oil Operator | Jun 2008 |
| 2750 | Hunt Energy Corporation | | Oil & Gas Operator | Feb 2002 |
| 2751 | Hunt Engineering Inc | Norman, OK 73069-4093 | Oil & Gas Operator | Feb 2019 |
| 2752 | Hunt H L | Dallas, TX 75202-2785 | Oil & Gas Operator | Jan 2025 |
| 2753 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | May 2026 |
| 2754 | Hunt Petroleum Corp. | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 2755 | Huntington Energy LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | May 2026 |
| 2756 | Huntington Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2006 |
| 2757 | Hunton Oil & Gas Corporation | Oklahoma City, OK 73154-0191 | Oil & Gas Operator | May 2019 |
| 2758 | Hunton Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2026 |
| 2759 | Hurd Oil Company | | Oil & Gas Operator | Jun 2015 |
| 2760 | Hurley Charles B | Santa Ana, CA 92706 | Oil & Gas Operator | Apr 2015 |
| 2761 | Hurricane Energy Corporation | | Oil & Gas Operator | Dec 2000 |
| 2762 | Hurst Oil Investments Inc | Oklahoma City, OK 73172 | Oil & Gas Operator | Feb 2015 |
| 2763 | Husky Petroleum | Seminole, OK 74818-1181 | Oil Operator | Feb 2012 |
| 2764 | Husky Ventures Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Jan 2026 |
| 2765 | Hutton Gas Operating Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 2766 | Hux Oil Company LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Feb 2026 |
| 2767 | Hyalite Energy Corporation | Pampa, TX 79066 | Oil & Gas Operator | Jan 2026 |
| 2768 | Hydrocarbon Management, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Dec 1996 |
| 2769 | Hydrocarbon Technology Services | | Oil & Gas Operator | Dec 2000 |
| 2770 | Hyperion Energy LP | Dallas, TX 75206 | Oil & Gas Operator | May 2014 |
| 2771 | Hyperion Oil & Gas LLC | Dallas, TX 75251 | Oil & Gas Operator | May 2026 |
| 2772 | I C Gas Amcana Inc | Tulsa, OK 74103-3713 | Oil & Gas Operator | Apr 1996 |
| 2773 | I D Oil Company Inc | Sperry, OK 74073-9417 | Oil Operator | Jan 2013 |
| 2774 | I T Enterprises Inc | Tulsa, OK 74170-0775 | Oil & Gas Operator | Mar 2011 |
| 2775 | I-Mac Petroleum Service Inc | Bixby, OK 74008-3778 | Oil & Gas Operator | Apr 2020 |
| 2776 | Icon Energy Company | Oklahoma City, OK 73156-1613 | Oil & Gas Operator | Jan 2026 |
| 2777 | Icor Oil & Gas Of Okla LTD | Claremore, OK 74018-2132 | Oil & Gas Operator | Mar 2015 |
| 2778 | Iep Kansas Gas, LLC | Burlington, CO 80807 | Oil & Gas Operator | Jan 2026 |
| 2779 | Igleheart Warren | Edmond, OK 73034-8964 | Oil & Gas Operator | Jun 2016 |
| 2780 | Ike Energy LLC | Stillwater, OK 74074-1745 | Oil & Gas Operator | Feb 2026 |
| 2781 | Ikenberry Herman & Ikenberry | | Oil Operator | Jul 1999 |
| 2782 | Illoma Oil Company Inc | Algonquin, IL 60102-1825 | Oil & Gas Operator | Mar 2015 |
| 2783 | Impact Energy Operating LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | Feb 2026 |
| 2784 | Imperial Petroleum Inc | Evansville, IN 47725 | Oil & Gas Operator | Jan 2005 |
| 2785 | Imperium Energy Inc | Atlanta, TX 75551 | Oil & Gas Operator | Jan 2026 |
| 2786 | Inca Oil Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2009 |
| 2787 | Inda Oil Unlimited | Bartlesville, OK 74006 | Oil Operator | Dec 2023 |
| 2788 | Indian Nation Energy Company | Wewoka, OK 74884-3456 | Oil & Gas Operator | Apr 2020 |
| 2789 | Indian Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | May 2026 |
| 2790 | Indian Territory Operating LLC | Salado, TX 76571 | Oil & Gas Operator | Jun 2025 |
| 2791 | Indian Wells Oil Co | Oklahoma City, OK 73116 | Oil & Gas Operator | Jan 2000 |
| 2792 | Indianola Oil Inc | Bartlesville, OK 74005 | Oil & Gas Operator | Aug 2000 |
| 2793 | Indrex Inc | Tulsa, OK 74133 | Oil & Gas Operator | Dec 2000 |
| 2794 | Inexco Oil Company | Houston, TX 77210 | Oil & Gas Operator | Mar 2013 |
| 2795 | Infinity Oil & Gas Inc | Nowata, OK 74048 | Oil Operator | Jun 1993 |
| 2796 | Ingersoll Oil Inc | Hominy, OK 74035 | Oil & Gas Operator | Jun 2000 |
| 2797 | Ingersoll Rosinbaum Oil Inc | | Oil & Gas Operator | Feb 2026 |
| 2798 | Ingram Exploration Inc | Seminole, OK 74868 | Oil & Gas Operator | Dec 2025 |
| 2799 | Injection Well Service | Lone Grove, OK 73443-0156 | Oil Operator | Apr 2005 |
| 2800 | Inland Oil Corporation | Sapulpa, OK 74067 | Oil & Gas Operator | Feb 2026 |