| 12601 | Haynie Drilling Co. Inc. | Corsicana, TX 75151 | Oil & Gas Operator | Dec 2011 |
| 12602 | Haynie Energy Services LLC | Wortham, TX 76693 | Oil Operator | May 2026 |
| 12603 | Haynie Robert L | | Gas Operator | Jan 2004 |
| 12604 | Hays & Boydston | Graham, TX 76450 | Oil & Gas Operator | Mar 1994 |
| 12605 | Hays & Croker Partnership | Graham, TX 76450 | Oil & Gas Operator | May 2026 |
| 12606 | Hays Herb E & K S | Bartlesville, OK 74006 | Oil Operator | Feb 2026 |
| 12607 | Hays Oil Field S | | Oil Operator | Nov 1988 |
| 12608 | Hays Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2000 |
| 12609 | Hays Partnership | Graham, TX 76450 | Oil & Gas Operator | May 2026 |
| 12610 | Hays Production LLC | Velma, OK 73491 | Oil & Gas Operator | Dec 2025 |
| 12611 | Hays Stanley L | Wynola, OK 74084 | Oil Operator | May 2022 |
| 12612 | Hays, David H. | Olney, TX 76374 | Oil & Gas Operator | Dec 1995 |
| 12613 | Hays, John H. | Graham, TX 76450 | Oil & Gas Operator | May 2026 |
| 12614 | Hays, Mrs. Earl (Cora) | Big Spring, TX 79720 | Oil & Gas Operator | Apr 2005 |
| 12615 | Hays, T.G. Petroleum Expl., Inc. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Dec 1994 |
| 12616 | Haywood, Paul M. Jr. | Denton, TX 76206 | Oil & Gas Operator | Mar 2002 |
| 12617 | Hazelett Oil Company, Inc. | Dale, TX 78616 | Oil & Gas Operator | Sep 2005 |
| 12618 | Hazelett Oil, Inc. | Dale, TX 78616 | Oil & Gas Operator | Aug 2024 |
| 12619 | Hazelwood Louis J | Albuquerque, NM 87111-6870 | Oil & Gas Operator | Feb 2023 |
| 12620 | Hazelwood Prod & Exp Co LLC | Oklahoma City, OK 73116-9037 | Oil & Gas Operator | Jan 2026 |
| 12621 | Hazen Oil Company | Cleveland, OK 74020-9633 | Oil Operator | Jul 2020 |
| 12622 | Hazen, Paul D. | Great Bend, KS 67530 | Oil Operator | Nov 1990 |
| 12623 | Hazen, Ty Anthony | Lyons, KS 67554 | Oil Operator | Dec 2025 |
| 12624 | Hazlewood Oil & Gas Co Inc | Oklahoma City, OK 73139-9353 | Oil & Gas Operator | Apr 2022 |
| 12625 | Hazoco, L.L.C. | Bellville, TX 77418 | Oil Operator | May 2026 |
| 12626 | HB Energy LLC | Wellsville, KS 66092 | Oil Operator | Dec 2025 |
| 12627 | HB Oil Company | Abilene, TX 79602 | Oil & Gas Operator | Jun 2023 |
| 12628 | HBC Oil Company, LLC | San Antonio, TX 78266 | Oil Operator | May 2026 |
| 12629 | HC Resources, Inc. | | Oil & Gas Operator | Jul 2011 |
| 12630 | Hce Operating LLC | Smyer, TX 79367 | Oil & Gas Operator | May 2026 |
| 12631 | HCG Energy Corporation & Subs | | Oil & Gas Operator | Mar 2015 |
| 12632 | HCL Inc | Woodward, OK 73802-1074 | Oil Operator | Mar 2015 |
| 12633 | HCM | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 12634 | HCW Exploration, Inc. | | Oil & Gas Operator | Jun 1986 |
| 12635 | HD Special-Situations, LP | San Francisco, CA 94111 | Oil & Gas Operator | Feb 2014 |
| 12636 | HD Well Services LLC | Wellsville, KS 66092 | Oil Operator | Dec 2025 |
| 12637 | HDH Resources, Inc. | Wilmore, KS 67155 | Oil & Gas Operator | Oct 2025 |
| 12638 | HDS Production | | Oil Operator | Mar 1998 |
| 12639 | HDT Inc. | | Oil & Gas Operator | Mar 2026 |
| 12640 | Headington Canada Corp. | Dallas, TX 75231 | Gas Operator | Jun 2000 |
| 12641 | Headington Energy Corporation | | Oil & Gas Operator | Aug 1992 |
| 12642 | Headington Energy Partners, LLC | Corpus Christ, TX 78401 | Oil & Gas Operator | May 2026 |
| 12643 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 12644 | Headington Oil Company LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2016 |
| 12645 | Headington Oil Company, L.P. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2008 |
| 12646 | Headline Resources, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Aug 1997 |
| 12647 | Headwaters Energy Partners, LLC | Dripping SPGS, TX 78620 | Oil & Gas Operator | May 2026 |
| 12648 | Headwaters Oil Company | | Oil & Gas Operator | Oct 1981 |
| 12649 | Heape Exploration, Inc. | Dallas, TX 75367 | Oil & Gas Operator | Dec 2020 |
| 12650 | Heape, Gene G. | Dallas, TX 75367 | Oil & Gas Operator | Jun 2003 |
| 12651 | Hearn Oil Co. LLC | Newport, OH 45768 | Oil & Gas Operator | Dec 2024 |
| 12652 | Heart Land Petroleum Corporation | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 12653 | Heartland Energy Company | Big Horn, WY 82833 | Gas Operator | Jun 2012 |
| 12654 | Heartland Enterprises, Incorporated | Phillipsburg, KS 67661 | Oil Operator | May 2005 |
| 12655 | Heartland Environmental Services | Watonga, OK 73080 | Oil & Gas Operator | May 1999 |
| 12656 | Heartland Exploration | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2000 |
| 12657 | Heartland Exploration Inc | Edmond, OK 73013 | Oil & Gas Operator | Dec 2015 |
| 12658 | Heartland Oil & Gas Inc. | Gypsum, KS 67448 | Gas Operator | Jun 2011 |
| 12659 | Heartland Production, Inc. | Cuero, TX 77954 | Oil & Gas Operator | May 2026 |
| 12660 | Heartland Pumping | Hennessey, OK 73742-7311 | Oil & Gas Operator | Feb 2026 |
| 12661 | Heartland Resources, Inc. | Temple, TX 76501 | Oil & Gas Operator | Mar 2008 |
| 12662 | Heartlands Development Co Inc | Bristow, OK 74010-3826 | Oil & Gas Operator | May 2017 |
| 12663 | Heat Can Oil, LLC | Chanute, KS 66720 | Oil Operator | Jun 2009 |
| 12664 | Heat Controller Inc | Jackson, MI 49204 | Oil & Gas Operator | Dec 1996 |
| 12665 | Heat Waves Hot Oil Service LLC | Denver, CO 80202 | Oil Operator | Jun 2011 |
| 12666 | Heath Jack A | Tulsa, OK 74132-2403 | Oil & Gas Operator | Jan 2013 |
| 12667 | Heath Oil Co., Inc. | Washington, OK 73093-4702 | Oil & Gas Operator | Jan 2026 |
| 12668 | Heath, Francis A. & Ruth E. | South Dayton, NY 14138 | Gas Operator | Dec 2024 |
| 12669 | Heath, Mark | Leoti, KS 67861 | Oil Operator | Nov 2009 |
| 12670 | Heather & Randy Iantorno Oil | Bolivar, NY 14715 | Oil & Gas Operator | Dec 2024 |
| 12671 | Heaton Everill L | Exeter, CA 93221-2340 | Oil & Gas Operator | Sep 2014 |
| 12672 | Hebert & Rucks L.L.C. | | Oil & Gas Operator | May 2002 |
| 12673 | Hebron Energy, LLC | Dallas, TX 75206 | Oil Operator | Jul 2018 |
| 12674 | Hec Petroleum, Inc | Midland, TX 79705 | Oil & Gas Operator | Mar 2006 |
| 12675 | Hedges Spencer | Casper, WY 82604 | Oil Operator | Mar 2024 |
| 12676 | Hedrick Production Inc. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | May 2026 |
| 12677 | Hedrick, Thomasine | Severy, KS 67137 | Oil Operator | May 2011 |
| 12678 | Heflin, Bryan Exploration, Inc. | Strawn, TX 76475 | Oil & Gas Operator | Mar 2008 |
| 12679 | Heger J J & Asso | | Oil Operator | Jun 1983 |
| 12680 | Hegwald, Jacob L. | Humboldt, KS 66748 | Oil Operator | Nov 2019 |
| 12681 | Hehns Quality Gardens Inc | Wadsworth, OH 44281 | Oil & Gas Operator | Dec 2024 |
| 12682 | Heifer Production Company LLC | Houston, TX 77098 | Oil & Gas Operator | May 2026 |
| 12683 | Heights Energy Corporation | Plano, TX 75026 | Oil & Gas Operator | May 2026 |
| 12684 | Heim, William J. | Springville, NY 14141 | Gas Operator | Dec 2024 |
| 12685 | Heineman, Ronald F. | Caledonia, NY 14423 | Gas Operator | Dec 2024 |
| 12686 | Heinrich Enterprises Inc Dba Washington Operations | Reno, OH 45773 | Oil & Gas Operator | Dec 2024 |
| 12687 | Heinrich Enterprises, Inc. | Reno, OH 45773-0305 | Oil & Gas Operator | Dec 2021 |
| 12688 | Heinrich Production Co Inc | Lubbuck, TX 79424 | Oil Operator | Dec 2024 |
| 12689 | Heintz Gas & Oil Company, Inc. | Allegany, NY 14706 | Gas Operator | Dec 2024 |
| 12690 | Heisey Ventures, Inc. | Houston, TX 77019 | Oil & Gas Operator | May 2026 |
| 12691 | Helberg Oil Comp | | Oil Operator | Mar 1995 |
| 12692 | Helbing & Podpechan | Clarence, OK 74018 | Oil & Gas Operator | May 1983 |
| 12693 | Held By Producti | | Oil & Gas Operator | Feb 1995 |
| 12694 | Held By Production, Inc. | Houston, TX 77251 | Oil & Gas Operator | May 1996 |
| 12695 | Helemrich & Payne Inc | Iraan, TX 79744 | Oil & Gas Operator | Sep 2002 |
| 12696 | Helena Production Corp | | Oil & Gas Operator | Dec 1991 |
| 12697 | Helena Resources Inc | Lakewood, CO 80215 | Oil & Gas Operator | Jan 2026 |
| 12698 | Helios Operating, LLC | Houston, TX 77056 | Oil & Gas Operator | May 2026 |
| 12699 | Helis Oil & Gas Company LLC Estate | New Orleans, LA 70130 | Oil & Gas Operator | Jul 2022 |
| 12700 | Helis Oil & Gas Company, L.L.C. | New Orleans, LA 70130 | Oil & Gas Operator | Oct 2023 |