| 13001 | Herlindah Gallegos | | Oil Operator | Dec 2007 |
| 13002 | Herman Fields | | Oil & Gas Operator | May 1989 |
| 13003 | Herman J Ledbetter | Abilene, TX 79606 | Oil & Gas Operator | Jul 1999 |
| 13004 | Herman Krug - Oil Operations | | Oil Operator | Jun 2025 |
| 13005 | Herman L Loeb | Lawrenceville, IL 62439 | Oil & Gas Operator | Jul 2009 |
| 13006 | Herman L. Loeb LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Jun 2025 |
| 13007 | Herman Lang Oil And Gas Co. | | Oil & Gas Operator | Dec 1992 |
| 13008 | Herman Riemer Gas Co | Sarver, PA 16055-8507 | Oil & Gas Operator | Dec 2016 |
| 13009 | Herman V Wallis | Kerrville, TX 780281858 | Gas Operator | Feb 2003 |
| 13010 | Herman'S Supply Company | West Seneca, NY 14224 | Gas Operator | Dec 2024 |
| 13011 | Hermat Salt Water Disposal, Inc. | Corpus Chrsti, TX 78426 | Oil Operator | Aug 2012 |
| 13012 | Hermes, A. J. | Lindsay, TX 76250 | Oil & Gas Operator | Mar 2018 |
| 13013 | Hermreck Oil Com | | Oil & Gas Operator | Aug 1996 |
| 13014 | Hermreck Oil Company | | Oil Operator | Nov 2024 |
| 13015 | Herms, Walter | Luling, TX 78648 | Oil & Gas Operator | Sep 2002 |
| 13016 | Herod, Bill | Ranger, TX 76470 | Oil & Gas Operator | Apr 2022 |
| 13017 | Heron Operating, LLC | | Oil & Gas Operator | Jul 2025 |
| 13018 | Herricks Oil Co. | San Angelo, TX 76906 | Oil & Gas Operator | Jan 2010 |
| 13019 | Herring Production Co | | Oil & Gas Operator | Mar 1992 |
| 13020 | Herring, Casey Oil Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Nov 2008 |
| 13021 | Herring, D Oil & Gas Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Nov 2025 |
| 13022 | Herring, Ray | Graham, TX 76450 | Oil & Gas Operator | Jul 2014 |
| 13023 | Herrman & Ikenberry | Cushing, OK 74023-0247 | Oil & Gas Operator | Dec 2003 |
| 13024 | Herrmann Arnold | Chandler, OK 74834 | Oil & Gas Operator | Sep 2024 |
| 13025 | Herrmann Energy | Amarillo, TX 79159 | Oil & Gas Operator | May 2015 |
| 13026 | Herrmann J B Oil And Gas | Amarillo, TX 79159-0670 | Oil & Gas Operator | Feb 2015 |
| 13027 | Herrmann, J.B. | Amarillo, TX 79159 | Oil & Gas Operator | Aug 2019 |
| 13028 | Herrmann, S. W. Oil & Gas | Amarillo, TX 79159 | Oil & Gas Operator | Nov 2025 |
| 13029 | Herschap Bros. | Bruni, TX 78344 | Oil & Gas Operator | Nov 2025 |
| 13030 | Hershey Oil | Pasadena, CA 91103 | Oil & Gas Operator | Dec 1988 |
| 13031 | Hershey Oil Corporation | | Oil & Gas Operator | Jul 1992 |
| 13032 | Hertel Oil Company | | Oil Operator | Nov 2018 |
| 13033 | Hertel Oil Company LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 13034 | Herv Oil, LLC | Oklahoma City, OK 73116 | Oil Operator | Aug 2025 |
| 13035 | Herzfeld Fabricators Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2017 |
| 13036 | Hesperus Energy II LLC | | Oil Operator | Jul 2025 |
| 13037 | Hess Bakken Investments II, LLC | | Oil & Gas Operator | Aug 2025 |
| 13038 | Hess Bros. DRLG. Co. | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2008 |
| 13039 | Hess Co2 Resources LLC | Seminole, TX 79360 | Gas Operator | Aug 2017 |
| 13040 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 13041 | Hess Corporation, A De Corp. | | Oil & Gas Operator | Oct 2006 |
| 13042 | Hess Ohio Developments LLC | Houston, TX 77010 | Oil & Gas Operator | Sep 2018 |
| 13043 | Hess Ohio Resources LLC | Houston, TX 77010 | Oil & Gas Operator | Jun 2014 |
| 13044 | Hess Oil Company | McPherson, KS 67460 | Oil & Gas Operator | Jun 2025 |
| 13045 | Hess Production | Quitaque, TX 79255 | Oil & Gas Operator | Nov 2025 |
| 13046 | Hess Seminole Assets LLC | Seminole, TX 79360 | Oil & Gas Operator | Aug 2017 |
| 13047 | Hess, Jay E. | Andover, NY 14806 | Oil & Gas Operator | Dec 2024 |
| 13048 | Hess, Jerry Operating Co. | Muenster, TX 76252 | Oil & Gas Operator | Nov 2025 |
| 13049 | Hesse Petroleum Co.,L.L.C. | Wichita, KS 67208 | Oil & Gas Operator | Jun 2025 |
| 13050 | Hessert Edward C | | Oil & Gas Operator | Sep 1993 |
| 13051 | Hessert Loc Inc | Carl Junction, MO 64834 | Oil Operator | Dec 2009 |
| 13052 | Hester Jr J C | Lawton, OK 73502-1887 | Oil & Gas Operator | Oct 1997 |
| 13053 | Hester, Harold & Betty | Bowling Green, KY 42101 | Oil Operator | Dec 2023 |
| 13054 | Heston Oil Company | Tulsa, OK 74108 | Oil & Gas Operator | Mar 2005 |
| 13055 | Hett Oil & Gas, LLC | Lincolnville, KS 66858 | Oil & Gas Operator | Jun 2025 |
| 13056 | Heuston Oil LLC | Bartlesville, OK 74006 | Oil & Gas Operator | Apr 2020 |
| 13057 | Hewitt Energy Group Inc | Salt Lake City, UT 84111 | Oil & Gas Operator | Apr 2015 |
| 13058 | Hewitt Oil, LLC | Bolivar, NY 14715 | Oil & Gas Operator | Dec 2024 |
| 13059 | Hewitt, Alan P. | Midland, TX 79702 | Oil & Gas Operator | Aug 1997 |
| 13060 | Hewitt, Douglas R | | Oil Operator | May 2025 |
| 13061 | Hewitt, Robert J. | Victoria, TX 77901 | Oil & Gas Operator | Jun 2004 |
| 13062 | Hexadyne Energy Corp. | | Oil & Gas Operator | Dec 2013 |
| 13063 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Nov 2025 |
| 13064 | Hexp Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Nov 2025 |
| 13065 | Heydrick Petroleum Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Nov 2025 |
| 13066 | Hez Petroleum Company | Graham, TX 76450 | Oil & Gas Operator | Nov 2025 |
| 13067 | HG Energy II Appalachia, LLC | | Oil & Gas Operator | Mar 2022 |
| 13068 | HG Energy LLC | Parkersburg, WV 26101 | Oil & Gas Operator | Dec 2021 |
| 13069 | HG Oil Holdings, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Jun 2025 |
| 13070 | HG Operating LLC | Plano, TX 75026 | Oil & Gas Operator | Nov 2025 |
| 13071 | HGH Energy, Inc. | | Oil & Gas Operator | Jun 2001 |
| 13072 | Hgi Corporation | Nada, TX 77460 | Oil & Gas Operator | Apr 2016 |
| 13073 | HGN Operating Company, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2014 |
| 13074 | HGN Operating I, LLC | Abilene, TX 79604 | Oil & Gas Operator | Nov 2025 |
| 13075 | HH&F Partners | Katy, TX 77450 | Oil & Gas Operator | Sep 2019 |
| 13076 | HHH & G Oil Co | Owasso, OK 74055 | Oil Operator | Jun 2020 |
| 13077 | HHL Development Inc | Garber, OK 73738 | Oil & Gas Operator | Aug 2025 |
| 13078 | Hi - Mountain Energy Corporation | Odessa, TX 79762 | Oil & Gas Operator | Nov 2025 |
| 13079 | Hi Plains Hydrocarbons, Inc. | Sunray, TX 79086 | Oil & Gas Operator | Oct 2002 |
| 13080 | Hi Snyder/Snyder Oil & Gas Inc | Dover, OH 44622 | Oil & Gas Operator | Dec 2019 |
| 13081 | Hi-Kat Petroleum | | Oil Operator | Mar 1990 |
| 13082 | Hi-Kat Petroleum Company | Liberal, KS 67905-1261 | Oil & Gas Operator | May 2014 |
| 13083 | Hi-Mi Exploration, LLC | Alvaton, KY 42122 | Oil & Gas Operator | Dec 2022 |
| 13084 | Hi-Pro Production | Gillette, WY 82717 | Gas Operator | Nov 2003 |
| 13085 | Hiawatha Exploration Company | Oklahoma City, OK 73116-7326 | Oil & Gas Operator | Mar 2009 |
| 13086 | Hibbard Energy, LP | Whitehouse, TX 75791 | Oil & Gas Operator | Nov 2025 |
| 13087 | Hibbard-Frost-Smith | | Oil & Gas Operator | Apr 1990 |
| 13088 | Hibbert R E Estate Of | Houston, TX 77002-3211 | Oil & Gas Operator | Apr 2015 |
| 13089 | Hibernia Resources III, LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2023 |
| 13090 | Hibernia Resources IV, LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2025 |
| 13091 | Hibernia Resources, LLC | Houston, TX 77027 | Oil & Gas Operator | Jun 2014 |
| 13092 | Hibernian Compan | | Oil & Gas Operator | Feb 1991 |
| 13093 | Hickey, Jeff | Whitesville, KY 42378 | Oil Operator | Dec 2023 |
| 13094 | Hickey, Kevin F. & Mary | Akron, NY 14001 | Gas Operator | Dec 2024 |
| 13095 | Hickman & Ickert | Olney, TX 76374 | Oil & Gas Operator | Feb 2002 |
| 13096 | Hickman, Chad | Burkesville, KY 42717 | Oil Operator | Dec 2023 |
| 13097 | Hickman, Johnny | | Oil & Gas Operator | Oct 2011 |
| 13098 | Hickman-Jordan-Halligan Ranches | Blackwell, TX 79506 | Oil & Gas Operator | Feb 1998 |
| 13099 | Hickory Petroleum Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jun 2013 |
| 13100 | Hickory-National Co. | | Oil Operator | Dec 1986 |