| 13001 | Hawkins, Blanche | Clay City, KY 40312 | Oil Operator | Dec 2023 |
| 13002 | Hawkins, David A | | Oil Operator | Dec 2023 |
| 13003 | Hawkins, G. A. | Graham, TX 76450 | Oil & Gas Operator | Dec 2013 |
| 13004 | Hawkins, James F. | Tulsa, OK 74103 | Oil Operator | Dec 2019 |
| 13005 | Hawkins, Robert S. | Kevin, MT 59454 | Oil Operator | Jun 2018 |
| 13006 | Hawks Company | Casper, WY 82602 | Oil & Gas Operator | Apr 2007 |
| 13007 | Hawks Industries Inc | Casper, WY 82601 | Oil & Gas Operator | Jun 1993 |
| 13008 | Hawkwood Energy Operating, LLC | Houston, TX 77224 | Oil & Gas Operator | Apr 2022 |
| 13009 | Hawley & Desimon | Conrad, MT 59425 | Oil Operator | Dec 2024 |
| 13010 | Hawley Hydrocarbons, Merrill&Carol Hawley Dba | Great Falls, MT 59405 | Oil Operator | Dec 2024 |
| 13011 | Hawley Oil Company | Conrad, MT 59425-9802 | Oil Operator | Dec 2024 |
| 13012 | Hawn Bros. & Venus Oil Co. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Aug 1995 |
| 13013 | Hawn Brothers | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2003 |
| 13014 | Hawn Brothers Company | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jan 2003 |
| 13015 | Hawn Petroleum I | | Oil Operator | Jun 1989 |
| 13016 | Hawthorn Energy Partners, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Apr 2025 |
| 13017 | Hawthorne Carl A | Mounds, OK 74047-4936 | Oil & Gas Operator | Apr 2015 |
| 13018 | Hawthorne Oil And Gas Corp. | Houston, TX 77227 | Oil & Gas Operator | Sep 1993 |
| 13019 | Hawthorne-Tipco | | Oil & Gas Operator | Oct 1978 |
| 13020 | Hay Creek Investments, L.L.C. | Santa Anna, TX 76878 | Oil Operator | Jul 2018 |
| 13021 | Hay Exploration, Inc | Ashland, KY 41102 | Oil & Gas Operator | Dec 2021 |
| 13022 | Hay Leonard | Rock Springs, WY 82901 | Oil & Gas Operator | Sep 1994 |
| 13023 | Hayabusa Energy USA, LLC | Pampa, TX 79065 | Oil & Gas Operator | Apr 2025 |
| 13024 | Hayden Harper Energy Ka, LLC | Charlotte, NC 28203-4173 | Oil & Gas Operator | Dec 2021 |
| 13025 | Hayden Operating | | Oil & Gas Operator | Dec 2024 |
| 13026 | Hayden, Mabel | Barkerton, KY 42717 | Oil Operator | Dec 2015 |
| 13027 | Haydens Oil And Gas LLC | Dover, OK 73734 | Oil & Gas Operator | Jan 2025 |
| 13028 | Hayes & Assoc Inc | | Oil & Gas Operator | Oct 1991 |
| 13029 | Hayes & Hudson | Bartlesville, OK 74003 | Oil & Gas Operator | Jan 2025 |
| 13030 | Hayes James Brent | Guysville, OH 45735-9496-9496 | Oil & Gas Operator | Dec 2024 |
| 13031 | Hayes Oil & Gas Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2005 |
| 13032 | Hayes Oil & Gas LLC | Attica, KS 67009 | Oil & Gas Operator | Dec 2024 |
| 13033 | Hayes, Marshall A. III | Chilton, TX 76632 | Oil & Gas Operator | Apr 2025 |
| 13034 | Haylan Oil Company | Midland, TX 79710 | Oil & Gas Operator | Jan 2000 |
| 13035 | Haylandia, LLC | Bloomfield, NY 14469 | Gas Operator | Dec 2023 |
| 13036 | Haynehead Operating Company, LLC | | Gas Operator | Feb 2016 |
| 13037 | Haynes & Shirley Production Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Apr 2025 |
| 13038 | Haynes Jim L & Betty L | Haskell, OK 74436-8803 | Oil & Gas Operator | Dec 2013 |
| 13039 | Haynes Production Company, Inc. | Brownwood, TX 76801 | Oil & Gas Operator | Dec 2006 |
| 13040 | Haynie Drilling Co. Inc. | Corsicana, TX 75151 | Oil & Gas Operator | Dec 2011 |
| 13041 | Haynie Energy Services LLC | Wortham, TX 76693 | Oil Operator | Apr 2025 |
| 13042 | Haynie Robert L | | Gas Operator | Jan 2004 |
| 13043 | Hays & Anderson | | Oil & Gas Operator | Feb 2019 |
| 13044 | Hays & Boydston | Graham, TX 76450 | Oil & Gas Operator | Mar 1994 |
| 13045 | Hays & Croker Partnership | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 13046 | Hays Herb E & K S | Bartlesville, OK 74006 | Oil Operator | Dec 2024 |
| 13047 | Hays Oil Field S | | Oil Operator | Nov 1988 |
| 13048 | Hays Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2000 |
| 13049 | Hays Partnership | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 13050 | Hays Production LLC | Velma, OK 73491 | Oil & Gas Operator | Feb 2025 |
| 13051 | Hays Stanley L | Wynola, OK 74084 | Oil Operator | May 2022 |
| 13052 | Hays, David H. | Olney, TX 76374 | Oil & Gas Operator | Dec 1995 |
| 13053 | Hays, John H. | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 13054 | Hays, Mrs. Earl (Cora) | Big Spring, TX 79720 | Oil & Gas Operator | Apr 2005 |
| 13055 | Hays, T.G. Petroleum Expl., Inc. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Dec 1994 |
| 13056 | Haysite Reinforced Plastics | Erie, PA 16509-3598 | Gas Operator | Dec 2024 |
| 13057 | Haywood, Paul M. Jr. | Denton, TX 76206 | Oil & Gas Operator | Mar 2002 |
| 13058 | Hazelett Oil Company, Inc. | Dale, TX 78616 | Oil & Gas Operator | Sep 2005 |
| 13059 | Hazelett Oil, Inc. | Dale, TX 78616 | Oil & Gas Operator | Aug 2024 |
| 13060 | Hazelwood Louis J | Albuquerque, NM 87111-6870 | Oil & Gas Operator | Feb 2023 |
| 13061 | Hazelwood Prod & Exp Co LLC | Oklahoma City, OK 73116-9037 | Oil & Gas Operator | Jan 2025 |
| 13062 | Hazen Oil Company | Cleveland, OK 74020-9633 | Oil Operator | Jul 2020 |
| 13063 | Hazen, Paul D. | Great Bend, KS 67530 | Oil Operator | Nov 1990 |
| 13064 | Hazen, Ty Anthony | Lyons, KS 67554 | Oil Operator | Dec 2024 |
| 13065 | Hazlewood Oil & Gas Co Inc | Oklahoma City, OK 73139-9353 | Oil & Gas Operator | Apr 2022 |
| 13066 | HB Energy LLC | Wellsville, KS 66092 | Oil Operator | Dec 2024 |
| 13067 | HB Oil Company | Abilene, TX 79602 | Oil & Gas Operator | Jun 2023 |
| 13068 | HBC Oil Company, LLC | San Antonio, TX 78266 | Oil Operator | Apr 2025 |
| 13069 | HC Resources, Inc. | | Oil & Gas Operator | Jul 2011 |
| 13070 | Hce Operating LLC | Smyer, TX 79367 | Oil & Gas Operator | Apr 2025 |
| 13071 | HCG Energy Corporation & Subs | | Oil & Gas Operator | Mar 2015 |
| 13072 | HCL Inc | Woodward, OK 73802-1074 | Oil Operator | Mar 2015 |
| 13073 | HCM | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 13074 | HCW Exploration, Inc. | | Oil & Gas Operator | Jun 1986 |
| 13075 | HD Special-Situations, LP | San Francisco, CA 94111 | Oil & Gas Operator | Feb 2014 |
| 13076 | HD Well Services LLC | Wellsville, KS 66092 | Oil Operator | Dec 2024 |
| 13077 | HDH Resources, Inc. | Wilmore, KS 67155 | Oil & Gas Operator | Sep 2024 |
| 13078 | HDS Production | | Oil Operator | Mar 1998 |
| 13079 | HDT Inc. | | Oil & Gas Operator | Dec 2024 |
| 13080 | Headington Canada Corp. | Dallas, TX 75231 | Gas Operator | Jun 2000 |
| 13081 | Headington Energy Corporation | Dallas, TX 75231 | Oil & Gas Operator | Aug 1992 |
| 13082 | Headington Energy Partners, LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2025 |
| 13083 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 13084 | Headington Oil Company LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2016 |
| 13085 | Headington Oil Company, L.P. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2008 |
| 13086 | Headline Resources, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Aug 1997 |
| 13087 | Headwaters Energy Partners, LLC | Dripping SPGS, TX 78620 | Oil & Gas Operator | Apr 2025 |
| 13088 | Headwaters Oil Company | | Oil & Gas Operator | Oct 1981 |
| 13089 | Heape Exploration, Inc. | Dallas, TX 75367 | Oil & Gas Operator | Dec 2020 |
| 13090 | Heape, Gene G. | Dallas, TX 75367 | Oil & Gas Operator | Jun 2003 |
| 13091 | Hearn Oil Co. LLC | Newport, OH 45768 | Oil & Gas Operator | Dec 2023 |
| 13092 | Heart Land Petroleum Corporation | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 13093 | Heartland Energy Company | Big Horn, WY 82833 | Gas Operator | Jun 2012 |
| 13094 | Heartland Enterprises, Incorporated | Phillipsburg, KS 67661 | Oil Operator | May 2005 |
| 13095 | Heartland Environmental Services | Watonga, OK 73080 | Oil & Gas Operator | May 1999 |
| 13096 | Heartland Exploration | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2000 |
| 13097 | Heartland Exploration Inc | Edmond, OK 73013 | Oil & Gas Operator | Dec 2015 |
| 13098 | Heartland Oil & Gas Company | | Oil & Gas Operator | Jun 2000 |
| 13099 | Heartland Oil & Gas Inc. | Gypsum, KS 67448 | Gas Operator | Jun 2011 |
| 13100 | Heartland Production, Inc. | Cuero, TX 77954 | Oil & Gas Operator | Apr 2025 |