| 2601 | Harrell Petroleum Inc | Oklahoma City, OK 73102-7201 | Oil & Gas Operator | Oct 2017 |
| 2602 | Harrell Verlan W | Oklahoma City, OK 73102-7201 | Oil & Gas Operator | Nov 1999 |
| 2603 | Harrington Billy B | Depew, OK 74028-3495 | Oil & Gas Operator | May 2006 |
| 2604 | Harrington Orville | Dewey, OK 74029 | Oil Operator | Oct 2025 |
| 2605 | Harrington SR Tommy W | Drumright, OK 74030-5778 | Oil Operator | May 2015 |
| 2606 | Harris B D | Norman, OK 73071-4802 | Oil & Gas Operator | Apr 2014 |
| 2607 | Harris Mildred C | Tulsa, OK 74120 | Oil & Gas Operator | Sep 2025 |
| 2608 | Harris Minerals Corp (The) | Oklahoma City, OK 73162-1045 | Oil & Gas Operator | Oct 2025 |
| 2609 | Harris Oil & Gas Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2016 |
| 2610 | Harris Olin | Okmulgee, OK 74447-8508 | Oil Operator | Feb 2012 |
| 2611 | Harrison Oil | Lindsay, OK 73052 | Oil & Gas Operator | Nov 2014 |
| 2612 | Harrison Oil & Gas Inc | Houston, TX 77019 | Oil & Gas Operator | Nov 2025 |
| 2613 | Harrison-Wright Oil Company LLC | Tulsa, OK 74133-7035 | Oil & Gas Operator | Nov 2025 |
| 2614 | Harrod Leasing | Edmond, OK 73034 | Oil & Gas Operator | Oct 2025 |
| 2615 | Hart David | Chickasha, OK 73018-7756 | Oil & Gas Operator | Mar 2015 |
| 2616 | Harter Energy Inc | Tulsa, OK 74105 | Oil & Gas Operator | Oct 2025 |
| 2617 | Hartline Tom | Drumright, OK 74030 | Oil Operator | Oct 2025 |
| 2618 | Hartman Oil Company Inc | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 2619 | Harvey A B | Seminole, OK 74868-1724 | Oil Operator | Mar 2015 |
| 2620 | Harwood Oil & Gas Inc | Greeley, CO 80631-8233 | Oil & Gas Operator | Oct 2025 |
| 2621 | Hat-Top Production Co | Duncan, OK 73533 | Oil Operator | Apr 2011 |
| 2622 | Hatley Delbert Jr Dba DH Enterprises | Oklahoma City, OK 73129 | Oil & Gas Operator | Nov 2025 |
| 2623 | Haught Harold | Hominy, OK 74035 | Oil Operator | Feb 2012 |
| 2624 | Hawkins & Hawkins | Council Hill, OK 74428 | Oil & Gas Operator | Jul 1996 |
| 2625 | Hawkins & Son Inc | Boynton, OK 74422 | Oil & Gas Operator | Aug 2019 |
| 2626 | Hawkins Oil & Gas Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2016 |
| 2627 | Hawthorne Carl A | Mounds, OK 74047-4936 | Oil & Gas Operator | Apr 2015 |
| 2628 | Haydens Oil And Gas LLC | Dover, OK 73734 | Oil & Gas Operator | Oct 2025 |
| 2629 | Hayes & Hudson | Bartlesville, OK 74003 | Oil & Gas Operator | Oct 2025 |
| 2630 | Haynes Jim L & Betty L | Haskell, OK 74436-8803 | Oil & Gas Operator | Dec 2013 |
| 2631 | Hays Herb E & K S | Bartlesville, OK 74006 | Oil Operator | Oct 2025 |
| 2632 | Hays Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2000 |
| 2633 | Hays Production LLC | Velma, OK 73491 | Oil & Gas Operator | Oct 2025 |
| 2634 | Hays Stanley L | Wynola, OK 74084 | Oil Operator | May 2022 |
| 2635 | Hazelwood Louis J | Albuquerque, NM 87111-6870 | Oil & Gas Operator | Feb 2023 |
| 2636 | Hazelwood Prod & Exp Co LLC | Oklahoma City, OK 73116-9037 | Oil & Gas Operator | Oct 2025 |
| 2637 | Hazen Oil Company | Cleveland, OK 74020-9633 | Oil Operator | Jul 2020 |
| 2638 | Hazlewood Oil & Gas Co Inc | Oklahoma City, OK 73139-9353 | Oil & Gas Operator | Apr 2022 |
| 2639 | HB Oil Company | Abilene, TX 79602 | Oil & Gas Operator | Jun 2023 |
| 2640 | HCG Energy Corporation & Subs | | Oil & Gas Operator | Mar 2015 |
| 2641 | HCL Inc | Woodward, OK 73802-1074 | Oil Operator | Mar 2015 |
| 2642 | HCM | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 2643 | Headington Energy Corporation | | Oil & Gas Operator | Aug 1992 |
| 2644 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 2645 | Headington Oil Company LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2016 |
| 2646 | Heartland Environmental Services | Watonga, OK 73080 | Oil & Gas Operator | May 1999 |
| 2647 | Heartland Exploration | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2000 |
| 2648 | Heartland Exploration Inc | Edmond, OK 73013 | Oil & Gas Operator | Dec 2015 |
| 2649 | Heartland Pumping | Hennessey, OK 73742-7311 | Oil & Gas Operator | Nov 2025 |
| 2650 | Heartlands Development Co Inc | Bristow, OK 74010-3826 | Oil & Gas Operator | May 2017 |
| 2651 | Heat Waves Hot Oil Service LLC | Denver, CO 80202 | Oil Operator | Jun 2011 |
| 2652 | Heath Jack A | Tulsa, OK 74132-2403 | Oil & Gas Operator | Jan 2013 |
| 2653 | Heath Oil Co., Inc. | Washington, OK 73093-4702 | Oil & Gas Operator | Oct 2025 |
| 2654 | Heaton Everill L | Exeter, CA 93221-2340 | Oil & Gas Operator | Sep 2014 |
| 2655 | Heights Energy Corporation | Plano, TX 75026 | Oil & Gas Operator | Dec 2025 |
| 2656 | Heinrich Production Co Inc | Lubbuck, TX 79424 | Oil Operator | Dec 2024 |
| 2657 | Helena Resources LLC | Helena, OK 73741 | Oil & Gas Operator | Nov 2025 |
| 2658 | Helke Exploration Company | Oklahoma City, OK 73112-7201 | Oil & Gas Operator | Feb 2000 |
| 2659 | Hellard Elmer J | Sapulpa, OK 74066 | Oil & Gas Operator | Oct 2025 |
| 2660 | Heller Phillip & Charlene | Columbia, MO 65201 | Oil & Gas Operator | Oct 2025 |
| 2661 | Helmco LTD | Kiefer, OK 74041-0397 | Oil & Gas Operator | Jan 2007 |
| 2662 | Helmco Production Company | Pawhuska, OK 74056 | Oil Operator | Aug 2000 |
| 2663 | Helmer Oil Corporation | | Oil & Gas Operator | Oct 2025 |
| 2664 | Helmer, Bonnie J | | Oil Operator | Oct 2025 |
| 2665 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Sep 2025 |
| 2666 | Helton Oil Company | Edmond, OK 73083-7283 | Oil & Gas Operator | Aug 2016 |
| 2667 | Hembree Alva | Oklahoma City, OK 73151-9145 | Oil & Gas Operator | Jun 2016 |
| 2668 | Hembree Brit W | Shawnee, OK 74802-1725 | Oil & Gas Operator | Oct 2025 |
| 2669 | Hemstead Oil Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2001 |
| 2670 | Henderson Charles E | Bokoshe, OK 74930 | Gas Operator | Oct 2021 |
| 2671 | Henderson Don Inc | Oklahoma City, OK 73134-1753 | Oil & Gas Operator | Aug 2013 |
| 2672 | Henderson Exploration Company | Tulsa, OK 74120 | Oil & Gas Operator | May 2013 |
| 2673 | Henderson Fred J | Okmulgee, OK 74447 | Oil & Gas Operator | Oct 2025 |
| 2674 | Hendrickson Lester | Delaware, OK 74027-9715 | Oil Operator | Mar 2015 |
| 2675 | Hendrickson W R | Beggs, OK 74421-2936 | Oil & Gas Operator | Jun 2023 |
| 2676 | Henley, VIola F | | Oil Operator | Oct 2025 |
| 2677 | Hennessey Oil & Gas LLC | Hennessey, OK 73742-0212 | Oil & Gas Operator | Sep 2024 |
| 2678 | Henry Billy Or Connie | Okemah, OK 74859-6075 | Oil & Gas Operator | Jul 2021 |
| 2679 | Henry Gungoll Operating Inc | Enid, OK 73703 | Oil & Gas Operator | Nov 2025 |
| 2680 | Henry Oil & Gas Inc | Oklahoma City, OK 73127 | Oil & Gas Operator | Jul 2009 |
| 2681 | Henry Petroleum Inc | Oklahoma City, OK 73162-1757 | Oil & Gas Operator | Sep 2019 |
| 2682 | Henry Petroleum Of Oklahoma LP | Midland, TX 79703-5000 | Oil & Gas Operator | Feb 2017 |
| 2683 | Henry Rennick | | Oil Operator | Oct 2025 |
| 2684 | Henry Wat Oil Company | Tulsa, OK 74101 | Oil Operator | Jan 2014 |
| 2685 | Henson Doyle | Okmulgee, OK 74447-4841 | Oil & Gas Operator | Jun 2020 |
| 2686 | Henson Terry Dba Daycon Exploration | Tulsa, OK 74133 | Oil & Gas Operator | Sep 2025 |
| 2687 | Hep Oil Company, LTD. | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2012 |
| 2688 | Hep Oil GP, LLC | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |
| 2689 | Heritage Exploration LLC | Oklahoma City, OK 73120-5622 | Oil & Gas Operator | Jan 2020 |
| 2690 | Heritage Oil Company Inc | Norman, OK 73070 | Oil & Gas Operator | Jul 2008 |
| 2691 | Heritage Petroleum, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Dec 2025 |
| 2692 | Herrman & Ikenberry | Cushing, OK 74023-0247 | Oil & Gas Operator | Dec 2003 |
| 2693 | Herrmann Arnold | Chandler, OK 74834 | Oil & Gas Operator | Sep 2024 |
| 2694 | Herrmann J B Oil And Gas | Amarillo, TX 79159-0670 | Oil & Gas Operator | Feb 2015 |
| 2695 | Herv Oil, LLC | Oklahoma City, OK 73116 | Oil Operator | Sep 2025 |
| 2696 | Herzfeld Fabricators Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2017 |
| 2697 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 2698 | Hester Jr J C | Lawton, OK 73502-1887 | Oil & Gas Operator | Oct 1997 |
| 2699 | Heston Oil Company | Tulsa, OK 74108 | Oil & Gas Operator | Mar 2005 |
| 2700 | Heuston Oil LLC | Bartlesville, OK 74006 | Oil & Gas Operator | Apr 2020 |