| 12801 | Haynes & Shirley Production Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Jul 2025 |
| 12802 | Haynes Jim L & Betty L | Haskell, OK 74436-8803 | Oil & Gas Operator | Dec 2013 |
| 12803 | Haynes Production Company, Inc. | Brownwood, TX 76801 | Oil & Gas Operator | Dec 2006 |
| 12804 | Haynie Drilling Co. Inc. | Corsicana, TX 75151 | Oil & Gas Operator | Dec 2011 |
| 12805 | Haynie Energy Services LLC | Wortham, TX 76693 | Oil Operator | Jul 2025 |
| 12806 | Haynie Robert L | | Gas Operator | Jan 2004 |
| 12807 | Hays & Anderson | | Oil & Gas Operator | Feb 2019 |
| 12808 | Hays & Boydston | Graham, TX 76450 | Oil & Gas Operator | Mar 1994 |
| 12809 | Hays & Croker Partnership | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 12810 | Hays Herb E & K S | Bartlesville, OK 74006 | Oil Operator | Mar 2025 |
| 12811 | Hays Oil Field S | | Oil Operator | Nov 1988 |
| 12812 | Hays Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2000 |
| 12813 | Hays Partnership | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 12814 | Hays Production LLC | Velma, OK 73491 | Oil & Gas Operator | May 2025 |
| 12815 | Hays Stanley L | Wynola, OK 74084 | Oil Operator | May 2022 |
| 12816 | Hays, David H. | Olney, TX 76374 | Oil & Gas Operator | Dec 1995 |
| 12817 | Hays, John H. | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 12818 | Hays, Mrs. Earl (Cora) | Big Spring, TX 79720 | Oil & Gas Operator | Apr 2005 |
| 12819 | Hays, T.G. Petroleum Expl., Inc. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Dec 1994 |
| 12820 | Haywood, Paul M. Jr. | Denton, TX 76206 | Oil & Gas Operator | Mar 2002 |
| 12821 | Hazelett Oil Company, Inc. | Dale, TX 78616 | Oil & Gas Operator | Sep 2005 |
| 12822 | Hazelett Oil, Inc. | Dale, TX 78616 | Oil & Gas Operator | Aug 2024 |
| 12823 | Hazelwood Louis J | Albuquerque, NM 87111-6870 | Oil & Gas Operator | Feb 2023 |
| 12824 | Hazelwood Prod & Exp Co LLC | Oklahoma City, OK 73116-9037 | Oil & Gas Operator | Apr 2025 |
| 12825 | Hazen Oil Company | Cleveland, OK 74020-9633 | Oil Operator | Jul 2020 |
| 12826 | Hazen, Paul D. | Great Bend, KS 67530 | Oil Operator | Nov 1990 |
| 12827 | Hazen, Ty Anthony | Lyons, KS 67554 | Oil Operator | Mar 2025 |
| 12828 | Hazlewood Oil & Gas Co Inc | Oklahoma City, OK 73139-9353 | Oil & Gas Operator | Apr 2022 |
| 12829 | Hazoco, L.L.C. | Bellville, TX 77418 | Oil Operator | Jul 2025 |
| 12830 | HB Energy LLC | Wellsville, KS 66092 | Oil Operator | Mar 2025 |
| 12831 | HB Oil Company | Abilene, TX 79602 | Oil & Gas Operator | Jun 2023 |
| 12832 | HBC Oil Company, LLC | San Antonio, TX 78266 | Oil Operator | Jul 2025 |
| 12833 | HC Resources, Inc. | | Oil & Gas Operator | Jul 2011 |
| 12834 | Hce Operating LLC | Smyer, TX 79367 | Oil & Gas Operator | Jul 2025 |
| 12835 | HCG Energy Corporation & Subs | | Oil & Gas Operator | Mar 2015 |
| 12836 | HCL Inc | Woodward, OK 73802-1074 | Oil Operator | Mar 2015 |
| 12837 | HCM | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 12838 | HCW Exploration, Inc. | | Oil & Gas Operator | Jun 1986 |
| 12839 | HD Special-Situations, LP | San Francisco, CA 94111 | Oil & Gas Operator | Feb 2014 |
| 12840 | HD Well Services LLC | Wellsville, KS 66092 | Oil Operator | Mar 2025 |
| 12841 | HDH Resources, Inc. | Wilmore, KS 67155 | Oil & Gas Operator | Mar 2025 |
| 12842 | HDS Production | | Oil Operator | Mar 1998 |
| 12843 | HDT Inc. | | Oil & Gas Operator | Apr 2025 |
| 12844 | Headington Canada Corp. | Dallas, TX 75231 | Gas Operator | Jun 2000 |
| 12845 | Headington Energy Corporation | Dallas, TX 75231 | Oil & Gas Operator | Aug 1992 |
| 12846 | Headington Energy Partners, LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jul 2025 |
| 12847 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 12848 | Headington Oil Company LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2016 |
| 12849 | Headington Oil Company, L.P. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2008 |
| 12850 | Headline Resources, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Aug 1997 |
| 12851 | Headwaters Energy Partners, LLC | Dripping SPGS, TX 78620 | Oil & Gas Operator | Jul 2025 |
| 12852 | Headwaters Oil Company | | Oil & Gas Operator | Oct 1981 |
| 12853 | Heape Exploration, Inc. | Dallas, TX 75367 | Oil & Gas Operator | Dec 2020 |
| 12854 | Heape, Gene G. | Dallas, TX 75367 | Oil & Gas Operator | Jun 2003 |
| 12855 | Hearn Oil Co. LLC | Newport, OH 45768 | Oil & Gas Operator | Dec 2023 |
| 12856 | Heart Land Petroleum Corporation | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 12857 | Heartland Energy Company | Big Horn, WY 82833 | Gas Operator | Jun 2012 |
| 12858 | Heartland Enterprises, Incorporated | Phillipsburg, KS 67661 | Oil Operator | May 2005 |
| 12859 | Heartland Environmental Services | Watonga, OK 73080 | Oil & Gas Operator | May 1999 |
| 12860 | Heartland Exploration | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2000 |
| 12861 | Heartland Exploration Inc | Edmond, OK 73013 | Oil & Gas Operator | Dec 2015 |
| 12862 | Heartland Oil & Gas Company | | Oil & Gas Operator | Jun 2000 |
| 12863 | Heartland Oil & Gas Inc. | Gypsum, KS 67448 | Gas Operator | Jun 2011 |
| 12864 | Heartland Production, Inc. | Cuero, TX 77954 | Oil & Gas Operator | Jul 2025 |
| 12865 | Heartland Pumping | Hennessey, OK 73742-7311 | Oil & Gas Operator | Apr 2025 |
| 12866 | Heartland Resources, Inc. | Temple, TX 76501 | Oil & Gas Operator | Mar 2008 |
| 12867 | Heartlands Development Co Inc | Bristow, OK 74010-3826 | Oil & Gas Operator | May 2017 |
| 12868 | Heat Can Oil, LLC | Chanute, KS 66720 | Oil Operator | Jun 2009 |
| 12869 | Heat Controller Inc | Jackson, MI 49204 | Oil & Gas Operator | Dec 1996 |
| 12870 | Heat Waves Hot Oil Service LLC | Denver, CO 80202 | Oil Operator | Jun 2011 |
| 12871 | Heath 91 Cluster LP | Commodore, PA 15729-9109 | Gas Operator | Dec 2020 |
| 12872 | Heath Jack A | Tulsa, OK 74132-2403 | Oil & Gas Operator | Jan 2013 |
| 12873 | Heath Oil Co., Inc. | Washington, OK 73093-4702 | Oil & Gas Operator | Apr 2025 |
| 12874 | Heath, Chad | Greensburg, KY 42743 | Oil Operator | Dec 2023 |
| 12875 | Heath, Francis A. & Ruth E. | South Dayton, NY 14138 | Gas Operator | Dec 2024 |
| 12876 | Heath, Mark | Leoti, KS 67861 | Oil Operator | Nov 2009 |
| 12877 | Heather & Randy Iantorno Oil | Bolivar, NY 14715 | Oil & Gas Operator | Dec 2024 |
| 12878 | Heatherly, Darl H. | Belington, WV 26250 | Gas Operator | Dec 2021 |
| 12879 | Heaton Everill L | Exeter, CA 93221-2340 | Oil & Gas Operator | Sep 2014 |
| 12880 | Hebert & Rucks L.L.C. | | Oil & Gas Operator | May 2002 |
| 12881 | Hebron Energy, LLC | Dallas, TX 75206 | Oil Operator | Jul 2018 |
| 12882 | Hec Petroleum, Inc | Midland, TX 79705 | Oil & Gas Operator | Mar 2006 |
| 12883 | Hedges Spencer | Casper, WY 82604 | Oil Operator | Mar 2024 |
| 12884 | Hedrick Production Inc. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Jul 2025 |
| 12885 | Hedrick, Thomasine | Severy, KS 67137 | Oil Operator | May 2011 |
| 12886 | Heflin, Bryan Exploration, Inc. | Strawn, TX 76475 | Oil & Gas Operator | Mar 2008 |
| 12887 | Heger J J & Asso | | Oil Operator | Jun 1983 |
| 12888 | Hegwald, Jacob L. | Humboldt, KS 66748 | Oil Operator | Nov 2019 |
| 12889 | Hehns Quality Gardens Inc | Wadsworth, OH 44281 | Oil & Gas Operator | Dec 2023 |
| 12890 | Heifer Production Company LLC | Houston, TX 77098 | Oil & Gas Operator | Jul 2025 |
| 12891 | Heights Energy Corporation | Plano, TX 75026 | Oil & Gas Operator | Jul 2025 |
| 12892 | Heim, William J. | Springville, NY 14141 | Gas Operator | Dec 2024 |
| 12893 | Heineman, Ronald F. | Caledonia, NY 14423 | Gas Operator | Dec 2024 |
| 12894 | Heinrich Enterprises Inc Dba Washington Operations | Reno, OH 45773 | Oil & Gas Operator | Dec 2024 |
| 12895 | Heinrich Enterprises, Inc. | Reno, OH 45773-0305 | Oil & Gas Operator | Dec 2021 |
| 12896 | Heinrich Production Co Inc | Lubbuck, TX 79424 | Oil Operator | Dec 2024 |
| 12897 | Heintz Gas & Oil Company, Inc. | Allegany, NY 14706 | Gas Operator | Dec 2024 |
| 12898 | Heisey Ventures, Inc. | Houston, TX 77019 | Oil & Gas Operator | Jul 2025 |
| 12899 | Helberg Oil Comp | | Oil Operator | Mar 1995 |
| 12900 | Helbing & Podpechan | Clarence, OK 74018 | Oil & Gas Operator | May 1983 |