| 13001 | Hayes, Marshall A. III | Chilton, TX 76632 | Oil & Gas Operator | Feb 2026 |
| 13002 | Haylan Oil Company | Midland, TX 79710 | Oil & Gas Operator | Jan 2000 |
| 13003 | Haylandia, LLC | Bloomfield, NY 14469 | Gas Operator | Dec 2024 |
| 13004 | Haynehead Operating Company, LLC | | Gas Operator | Feb 2016 |
| 13005 | Haynes & Shirley Production Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Feb 2026 |
| 13006 | Haynes Jim L & Betty L | Haskell, OK 74436-8803 | Oil & Gas Operator | Dec 2013 |
| 13007 | Haynes Production Company, Inc. | Brownwood, TX 76801 | Oil & Gas Operator | Dec 2006 |
| 13008 | Haynes, Keisel | Bushnell, IL 61422-000 | Gas Operator | Dec 2014 |
| 13009 | Haynie Drilling Co. Inc. | Corsicana, TX 75151 | Oil & Gas Operator | Dec 2011 |
| 13010 | Haynie Energy Services LLC | Wortham, TX 76693 | Oil Operator | Feb 2026 |
| 13011 | Haynie Robert L | | Gas Operator | Jan 2004 |
| 13012 | Hays & Anderson | | Oil & Gas Operator | Feb 2019 |
| 13013 | Hays & Boydston | Graham, TX 76450 | Oil & Gas Operator | Mar 1994 |
| 13014 | Hays & Croker Partnership | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 13015 | Hays Herb E & K S | Bartlesville, OK 74006 | Oil Operator | Oct 2025 |
| 13016 | Hays Oil Field S | | Oil Operator | Nov 1988 |
| 13017 | Hays Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2000 |
| 13018 | Hays Partnership | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 13019 | Hays Production LLC | Velma, OK 73491 | Oil & Gas Operator | Oct 2025 |
| 13020 | Hays Stanley L | Wynola, OK 74084 | Oil Operator | May 2022 |
| 13021 | Hays, David H. | Olney, TX 76374 | Oil & Gas Operator | Dec 1995 |
| 13022 | Hays, John H. | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 13023 | Hays, Mrs. Earl (Cora) | Big Spring, TX 79720 | Oil & Gas Operator | Apr 2005 |
| 13024 | Hays, T.G. Petroleum Expl., Inc. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Dec 1994 |
| 13025 | Haysite Reinforced Plastics | Erie, PA 16509-3598 | Gas Operator | Dec 2024 |
| 13026 | Haywood, Paul M. Jr. | Denton, TX 76206 | Oil & Gas Operator | Mar 2002 |
| 13027 | Hazelett Oil Company, Inc. | Dale, TX 78616 | Oil & Gas Operator | Sep 2005 |
| 13028 | Hazelett Oil, Inc. | Dale, TX 78616 | Oil & Gas Operator | Aug 2024 |
| 13029 | Hazelwood Louis J | Albuquerque, NM 87111-6870 | Oil & Gas Operator | Feb 2023 |
| 13030 | Hazelwood Prod & Exp Co LLC | Oklahoma City, OK 73116-9037 | Oil & Gas Operator | Oct 2025 |
| 13031 | Hazen Oil Company | Cleveland, OK 74020-9633 | Oil Operator | Jul 2020 |
| 13032 | Hazen, Paul D. | Great Bend, KS 67530 | Oil Operator | Nov 1990 |
| 13033 | Hazen, Ty Anthony | Lyons, KS 67554 | Oil Operator | Sep 2025 |
| 13034 | Hazlewood Oil & Gas Co Inc | Oklahoma City, OK 73139-9353 | Oil & Gas Operator | Apr 2022 |
| 13035 | Hazoco, L.L.C. | Bellville, TX 77418 | Oil Operator | Feb 2026 |
| 13036 | HB Energy LLC | Wellsville, KS 66092 | Oil Operator | Sep 2025 |
| 13037 | HB Oil Company | Abilene, TX 79602 | Oil & Gas Operator | Jun 2023 |
| 13038 | HB Oil, LLC | Sunburst, MT 59482 | Oil Operator | Nov 2025 |
| 13039 | HBC Oil Company, LLC | San Antonio, TX 78266 | Oil Operator | Feb 2026 |
| 13040 | HC Resources, Inc. | | Oil & Gas Operator | Jul 2011 |
| 13041 | Hce Operating LLC | Smyer, TX 79367 | Oil & Gas Operator | Feb 2026 |
| 13042 | HCG Energy Corporation & Subs | | Oil & Gas Operator | Mar 2015 |
| 13043 | HCL Inc | Woodward, OK 73802-1074 | Oil Operator | Mar 2015 |
| 13044 | HCM | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 13045 | HCW Exploration, Inc. | | Oil & Gas Operator | Jun 1986 |
| 13046 | HD Special-Situations, LP | San Francisco, CA 94111 | Oil & Gas Operator | Feb 2014 |
| 13047 | HD Well Services LLC | Wellsville, KS 66092 | Oil Operator | Sep 2025 |
| 13048 | HDH Resources, Inc. | Wilmore, KS 67155 | Oil & Gas Operator | Jul 2025 |
| 13049 | HDS Production | | Oil Operator | Mar 1998 |
| 13050 | HDT Inc. | | Oil & Gas Operator | Nov 2025 |
| 13051 | Headington Canada Corp. | Dallas, TX 75231 | Gas Operator | Jun 2000 |
| 13052 | Headington Energy Corporation | | Oil & Gas Operator | Aug 1992 |
| 13053 | Headington Energy Partners, LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Feb 2026 |
| 13054 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 13055 | Headington Oil Company LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2016 |
| 13056 | Headington Oil Company, L.P. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2008 |
| 13057 | Headline Resources, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Aug 1997 |
| 13058 | Headwaters Energy Partners, LLC | Dripping SPGS, TX 78620 | Oil & Gas Operator | Feb 2026 |
| 13059 | Headwaters Oil Company | | Oil & Gas Operator | Oct 1981 |
| 13060 | Heape Exploration, Inc. | Dallas, TX 75367 | Oil & Gas Operator | Dec 2020 |
| 13061 | Heape, Gene G. | Dallas, TX 75367 | Oil & Gas Operator | Jun 2003 |
| 13062 | Hearn Oil Co. LLC | Newport, OH 45768 | Oil & Gas Operator | Dec 2024 |
| 13063 | Heart Land Petroleum Corporation | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 13064 | Heartland Energy Company | Big Horn, WY 82833 | Gas Operator | Jun 2012 |
| 13065 | Heartland Energy Corp | Rockville, MD 208531658 | Gas Operator | Jun 1997 |
| 13066 | Heartland Enterprises, Incorporated | Phillipsburg, KS 67661 | Oil Operator | May 2005 |
| 13067 | Heartland Environmental Services | Watonga, OK 73080 | Oil & Gas Operator | May 1999 |
| 13068 | Heartland Exploration | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2000 |
| 13069 | Heartland Exploration Inc | Edmond, OK 73013 | Oil & Gas Operator | Dec 2015 |
| 13070 | Heartland Oil & Gas Inc. | Gypsum, KS 67448 | Gas Operator | Jun 2011 |
| 13071 | Heartland Production, Inc. | Cuero, TX 77954 | Oil & Gas Operator | Feb 2026 |
| 13072 | Heartland Pumping | Hennessey, OK 73742-7311 | Oil & Gas Operator | Nov 2025 |
| 13073 | Heartland Resources, Inc. | Temple, TX 76501 | Oil & Gas Operator | Mar 2008 |
| 13074 | Heartlands Development Co Inc | Bristow, OK 74010-3826 | Oil & Gas Operator | May 2017 |
| 13075 | Heat Can Oil, LLC | Chanute, KS 66720 | Oil Operator | Jun 2009 |
| 13076 | Heat Controller Inc | Jackson, MI 49204 | Oil & Gas Operator | Dec 1996 |
| 13077 | Heat Waves Hot Oil Service LLC | Denver, CO 80202 | Oil Operator | Jun 2011 |
| 13078 | Heath 91 Cluster LP | Commodore, PA 15729-9109 | Gas Operator | Dec 2020 |
| 13079 | Heath Jack A | Tulsa, OK 74132-2403 | Oil & Gas Operator | Jan 2013 |
| 13080 | Heath Oil Co., Inc. | Washington, OK 73093-4702 | Oil & Gas Operator | Oct 2025 |
| 13081 | Heath, Chad | Greensburg, KY 42743 | Oil Operator | Dec 2023 |
| 13082 | Heath, Francis A. & Ruth E. | South Dayton, NY 14138 | Gas Operator | Dec 2024 |
| 13083 | Heath, Mark | Leoti, KS 67861 | Oil Operator | Nov 2009 |
| 13084 | Heather & Randy Iantorno Oil | Bolivar, NY 14715 | Oil & Gas Operator | Dec 2024 |
| 13085 | Heatherly, Darl H. | Belington, WV 26250 | Gas Operator | Dec 2021 |
| 13086 | Heaton Everill L | Exeter, CA 93221-2340 | Oil & Gas Operator | Sep 2014 |
| 13087 | Hebert & Rucks L.L.C. | | Oil & Gas Operator | May 2002 |
| 13088 | Hebron Energy, LLC | Dallas, TX 75206 | Oil Operator | Jul 2018 |
| 13089 | Hec Petroleum, Inc | Midland, TX 79705 | Oil & Gas Operator | Mar 2006 |
| 13090 | Hedges Spencer | Casper, WY 82604 | Oil Operator | Mar 2024 |
| 13091 | Hedrick Production Inc. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Feb 2026 |
| 13092 | Hedrick, Thomasine | Severy, KS 67137 | Oil Operator | May 2011 |
| 13093 | Heflin, Bryan Exploration, Inc. | Strawn, TX 76475 | Oil & Gas Operator | Mar 2008 |
| 13094 | Heger J J & Asso | | Oil Operator | Jun 1983 |
| 13095 | Hegwald, Jacob L. | Humboldt, KS 66748 | Oil Operator | Nov 2019 |
| 13096 | Hehns Quality Gardens Inc | Wadsworth, OH 44281 | Oil & Gas Operator | Dec 2024 |
| 13097 | Heifer Production Company LLC | Houston, TX 77098 | Oil & Gas Operator | Feb 2026 |
| 13098 | Heights Energy Corporation | Plano, TX 75026 | Oil & Gas Operator | Feb 2026 |
| 13099 | Heim, William J. | Springville, NY 14141 | Gas Operator | Dec 2024 |
| 13100 | Heineman, Ronald F. | Caledonia, NY 14423 | Gas Operator | Dec 2024 |