| 2601 | Heartland Exploration | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2000 |
| 2602 | Heartland Exploration Inc | Edmond, OK 73013 | Oil & Gas Operator | Dec 2015 |
| 2603 | Heartland Pumping | Hennessey, OK 73742-7311 | Oil & Gas Operator | Jan 2024 |
| 2604 | Heartlands Development Co Inc | Bristow, OK 74010-3826 | Oil & Gas Operator | May 2017 |
| 2605 | Heat Waves Hot Oil Service LLC | Denver, CO 80202 | Oil Operator | Jun 2011 |
| 2606 | Heath B M | | Oil & Gas Operator | Feb 1994 |
| 2607 | Heath Jack A | Tulsa, OK 74132-2403 | Oil & Gas Operator | Jan 2013 |
| 2608 | Heath Oil Company | Washington, OK 73093-4702 | Oil & Gas Operator | Jan 2024 |
| 2609 | Heaton Everill L | Exeter, CA 93221-2340 | Oil & Gas Operator | Sep 2014 |
| 2610 | Hegco Canada Inc | | Oil & Gas Operator | Nov 2003 |
| 2611 | Heights Energy Corporation | Plano, TX 75026 | Oil & Gas Operator | May 2024 |
| 2612 | Heinrich Production Inc | Rosenberg, TX 77471 | Oil Operator | Sep 2022 |
| 2613 | Helena Resources LLC | Helena, OK 73741-4120 | Oil & Gas Operator | Jan 2024 |
| 2614 | Hellard Elmer J | Sapulpa, OK 74066 | Oil & Gas Operator | Feb 2024 |
| 2615 | Heller, Phillip & Charlene | Columbia, MO 65201 | Oil & Gas Operator | Jan 2024 |
| 2616 | Helmco LTD | Kiefer, OK 74041-0397 | Oil & Gas Operator | Jan 2007 |
| 2617 | Helmco Production Company | Pawhuska, OK 74056 | Oil Operator | Aug 2000 |
| 2618 | Helmer Bonnie Jean Revocable Trust | Pawhuska, OK 74056 | Oil Operator | Jan 2024 |
| 2619 | Helmer Oil Corporation | Pawhuska, OK 74056 | Oil & Gas Operator | Jan 2024 |
| 2620 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Jan 2024 |
| 2621 | Helton Oil Company | Edmond, OK 73083-7283 | Oil & Gas Operator | Aug 2016 |
| 2622 | Hembree Alva | Oklahoma City, OK 73151-9145 | Oil & Gas Operator | Jun 2016 |
| 2623 | Hembree Brit W | Shawnee, OK 74804-1725 | Oil & Gas Operator | Jan 2024 |
| 2624 | Hemstead Oil Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2001 |
| 2625 | Henderson Art | Pawhuska, OK 74056 | Oil & Gas Operator | May 2014 |
| 2626 | Henderson Don Inc | Oklahoma City, OK 73134-1753 | Oil & Gas Operator | Aug 2013 |
| 2627 | Henderson Exploration Company | Tulsa, OK 74120 | Oil & Gas Operator | May 2013 |
| 2628 | Henderson Fred J | Okmulgee, OK 74447-9204 | Oil & Gas Operator | Feb 2024 |
| 2629 | Henderson Operating Co Inc | | Oil & Gas Operator | Nov 2003 |
| 2630 | Hendrickson Lester | Delaware, OK 74027-9715 | Oil Operator | Mar 2015 |
| 2631 | Hendrickson W R | Beggs, OK 74421-2936 | Oil & Gas Operator | Jun 2023 |
| 2632 | Henley Dean | Pawhuska, OK 74056 | Oil Operator | Jan 2024 |
| 2633 | Hennessey Oil & Gas LLC | Hennessey, OK 73742-0212 | Oil & Gas Operator | Jan 2024 |
| 2634 | Henry Billy Or Connie | Okemah, OK 74859-6075 | Oil & Gas Operator | Jul 2021 |
| 2635 | Henry Gungoll Operating Inc | Enid, OK 73702-6209 | Oil & Gas Operator | Feb 2024 |
| 2636 | Henry Oil & Gas Inc | Oklahoma City, OK 73127 | Oil & Gas Operator | Jul 2009 |
| 2637 | Henry Petroleum Inc | Oklahoma City, OK 73162-1757 | Oil & Gas Operator | Sep 2019 |
| 2638 | Henry Petroleum Of Oklahoma LP | Midland, TX 79703-5000 | Oil & Gas Operator | Feb 2017 |
| 2639 | Henry Wat Oil Company | Tulsa, OK 74101 | Oil Operator | Jan 2014 |
| 2640 | Henson Doyle | Okmulgee, OK 74447-4841 | Oil & Gas Operator | Jun 2020 |
| 2641 | Henson Terry Dba Daycon Exploration | Tulsa, OK 74137-3546 | Oil & Gas Operator | Jan 2024 |
| 2642 | Hep Oil Company LTD | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2012 |
| 2643 | Hep Oil GP, LLC | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |
| 2644 | Heritage Oil Company | Norman, OK 73070 | Oil & Gas Operator | Jul 2008 |
| 2645 | Heritage Petroleum, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | May 2024 |
| 2646 | Herrman & Ikenberry | Cushing, OK 74023-0247 | Oil & Gas Operator | Dec 2003 |
| 2647 | Herrmann Arnold | Chandler, OK 74834 | Oil & Gas Operator | Jul 2023 |
| 2648 | Herrmann J B Oil And Gas | Amarillo, TX 79159-0670 | Oil & Gas Operator | Feb 2015 |
| 2649 | Herzfeld Fabricators Inc | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2017 |
| 2650 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 2651 | Hester Jr J C | Lawton, OK 73502-1887 | Oil & Gas Operator | Oct 1997 |
| 2652 | Heuston Oil LLC | Bartlesville, OK 74006 | Oil & Gas Operator | Apr 2020 |
| 2653 | Hewitt Doug | Hominy, OK 74035 | Oil Operator | Aug 2023 |
| 2654 | Hewitt Energy Group, Inc. | Salt Lake City, UT 84111 | Oil & Gas Operator | Apr 2015 |
| 2655 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | May 2024 |
| 2656 | HGN Operating Co Inc | Abilene, TX 79604 | Oil & Gas Operator | Jul 2014 |
| 2657 | HHH & G Oil Co | Owasso, OK 74055 | Oil Operator | Jun 2020 |
| 2658 | HHL Development Inc | Garber, OK 73738-0478 | Oil & Gas Operator | Jan 2024 |
| 2659 | Hi-Kat Petroleum Company | Liberal, KS 67905-1261 | Oil & Gas Operator | May 2014 |
| 2660 | Hiawatha Exploration Company | Oklahoma City, OK 73116-7326 | Oil & Gas Operator | Mar 2009 |
| 2661 | Hibbert R E Estate Of | Houston, TX 77002-3211 | Oil & Gas Operator | Apr 2015 |
| 2662 | High Energy | Cushing, OK 74023-1762 | Oil & Gas Operator | Jan 2024 |
| 2663 | High McDonald Operating Co | Norman, OK 73072-7607 | Oil Operator | Jan 2024 |
| 2664 | High Sierra Crude Oil& Marketing LLC | Ardmore, OK 73401 | Oil Operator | Nov 2013 |
| 2665 | High Sierra Water Services Mid Continent LLC | Denver, CO 80209 | Oil Operator | Feb 2010 |
| 2666 | Highfill Bob W | Claremore, OK 74018-2595 | Oil Operator | Jun 2005 |
| 2667 | Highland Energy Co | Dallas, TX 75201 | Oil & Gas Operator | Jun 1994 |
| 2668 | Highland Minerals, Inc. | Tulsa, OK 74145-7627 | Oil & Gas Operator | Apr 2015 |
| 2669 | Highland Oil & Gas LLC | Houston, TX 77079-7220 | Oil & Gas Operator | Feb 2015 |
| 2670 | Highmark Energy Operating, LLC | Poynor, TX 75782 | Oil & Gas Operator | May 2024 |
| 2671 | Highmount Operating LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2014 |
| 2672 | Hightower Energy LLC | | Oil & Gas Operator | Jan 2024 |
| 2673 | Hightower Oil & Gas | Cairo, IL 62914-0401 | Oil Operator | Nov 2014 |
| 2674 | Highway 15 SWD LLC | | Oil Operator | Oct 2021 |
| 2675 | Highway 60 SWD LLC | | Oil Operator | Jul 2019 |
| 2676 | Hikcott Oil | Wilson, OK 73463-6537 | Oil Operator | Jan 2014 |
| 2677 | Hiland Energy LP | Enid, OK 73701-0032 | Oil & Gas Operator | Dec 2022 |
| 2678 | Hill Gilford | Stroud, OK 74079-9401 | Oil & Gas Operator | May 2013 |
| 2679 | Hill John H | Dallas, TX 75240-7077 | Oil & Gas Operator | Jul 2015 |
| 2680 | Hill Oil Company Inc | | Oil & Gas Operator | Jan 2024 |
| 2681 | Hill Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2009 |
| 2682 | Hill Resources Inc | | Oil & Gas Operator | Nov 2022 |
| 2683 | Hill Robert H & Willa F | Morris, OK 74445 | Oil & Gas Operator | Apr 2020 |
| 2684 | Hill William H | Broken Arrow, OK 74012-8952 | Oil & Gas Operator | Apr 2020 |
| 2685 | Hillenburg Oil Company | Broken Arrow, OK 74011-4021 | Oil Operator | Apr 2011 |
| 2686 | Hilliard Oil & Gas Inc | New Orleans, LA 70112 | Oil & Gas Operator | May 2001 |
| 2687 | Hilligoss Leonard | | Oil Operator | Aug 2022 |
| 2688 | Hillin-Simon Oil Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2013 |
| 2689 | Hills Dozer Service | Stroud, OK 74079 | Oil & Gas Operator | Mar 2022 |
| 2690 | Hillside Resources | Bartlesville, OK 74005 | Oil & Gas Operator | Jan 2007 |
| 2691 | Hilltop Disposal LLC | Elk City, OK 73644-2400 | Oil Operator | Jun 2021 |
| 2692 | Himco Oil & Gas, Inc. | Enid, OK 73702 | Oil & Gas Operator | Jan 2024 |
| 2693 | Hinkle Engineering, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2016 |
| 2694 | Hinkle Oil And Gas Inc | Oklahoma City, OK 73112-4275 | Oil & Gas Operator | Feb 2024 |
| 2695 | Hinson Bobbie L | Bristow, OK 74010-0899 | Oil & Gas Operator | Dec 2023 |
| 2696 | Hinson Jr Bobbie L | Bristow, OK 74010-8420 | Oil & Gas Operator | Jul 2020 |
| 2697 | His Energy Corporation Inc | Newcastle, OK 73065-1461 | Oil Operator | Feb 2018 |
| 2698 | Hitchita #1 LP | Edmond, OK 73013-6628 | Oil & Gas Operator | Sep 1997 |
| 2699 | Hixon James E | | Oil Operator | Feb 2004 |
| 2700 | HK Energy Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2023 |