| 13001 | Herald Oil & Gas Co | Middleport, OH 45760-9000 | Oil & Gas Operator | Dec 2010 |
| 13002 | Herbaly Petroleum Corp | FT Worth, TX 76102 | Oil & Gas Operator | Feb 2002 |
| 13003 | Herber, Carl R. | Denton, TX 76205 | Oil & Gas Operator | Apr 2014 |
| 13004 | Herbert J. Schmitz | | Oil & Gas Operator | Dec 1987 |
| 13005 | Herbig Oil & Gas Co. | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 13006 | Herbig, J F | Midland, TX 79701 | Oil & Gas Operator | Mar 1998 |
| 13007 | Herbst Resources, Inc. | Mandeville, LA 70448 | Oil & Gas Operator | Aug 2003 |
| 13008 | Herd Producing Company, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Jul 2025 |
| 13009 | Hereford, J. A. Industries, Inc. | Nacogdoches, TX 75961 | Oil & Gas Operator | Jul 2025 |
| 13010 | Herencia Operating LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Jul 2025 |
| 13011 | Heritage Energy Company | | Oil & Gas Operator | Jun 2001 |
| 13012 | Heritage Energy Corporation | Waco, TX 76710 | Oil & Gas Operator | Sep 2004 |
| 13013 | Heritage Expl. & Prod. Co., Inc. | Stafford, TX 77497 | Oil & Gas Operator | Dec 2000 |
| 13014 | Heritage Exploration LLC | Oklahoma City, OK 73120-5622 | Oil & Gas Operator | Jan 2020 |
| 13015 | Heritage Oil Company | Norman, OK 73070 | Oil & Gas Operator | Jul 2008 |
| 13016 | Heritage Oil L.L.C. | Hays, KS 67601 | Oil Operator | Mar 2025 |
| 13017 | Heritage Operating Co., Inc. The | Stafford, TX 77497 | Oil & Gas Operator | May 1997 |
| 13018 | Heritage Petroleum Corporation | Cleburne, TX 76033 | Oil & Gas Operator | Jul 2025 |
| 13019 | Heritage Petroleum, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Jul 2025 |
| 13020 | Heritage Resources, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Feb 2014 |
| 13021 | Heritage Standard Corporation | Dallas, TX 75206 | Oil & Gas Operator | Jul 2025 |
| 13022 | Herley Olive Holdings LLC | | Oil & Gas Operator | May 2025 |
| 13023 | Herley Petroleum | | Oil & Gas Operator | Dec 1997 |
| 13024 | Herley-Kelley LLC | | Oil & Gas Operator | May 2025 |
| 13025 | Herlihy, John D. | | Oil & Gas Operator | May 1997 |
| 13026 | Herlin Et Al | | Oil & Gas Operator | Mar 1985 |
| 13027 | Herlindah Gallegos | | Oil Operator | Dec 2007 |
| 13028 | Herman Fields | | Oil & Gas Operator | May 1989 |
| 13029 | Herman J Ledbetter | Abilene, TX 79606 | Oil & Gas Operator | Jul 1999 |
| 13030 | Herman Krug - Oil Operations | | Oil Operator | Mar 2025 |
| 13031 | Herman L Loeb | Lawrenceville, IL 62439 | Oil & Gas Operator | Jul 2009 |
| 13032 | Herman L. Loeb, LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Mar 2025 |
| 13033 | Herman Lang Oil And Gas Co. | | Oil & Gas Operator | Dec 1992 |
| 13034 | Herman Riemer Gas Co | Sarver, PA 16055-8507 | Oil & Gas Operator | Dec 2016 |
| 13035 | Herman V Wallis | Kerrville, TX 780281858 | Gas Operator | Feb 2003 |
| 13036 | Herman'S Supply Company | West Seneca, NY 14224 | Gas Operator | Dec 2024 |
| 13037 | Hermat Salt Water Disposal, Inc. | Corpus Chrsti, TX 78426 | Oil Operator | Aug 2012 |
| 13038 | Hermes, A. J. | Lindsay, TX 76250 | Oil & Gas Operator | Mar 2018 |
| 13039 | Hermreck Oil Com | | Oil & Gas Operator | Aug 1996 |
| 13040 | Hermreck Oil Company | | Oil Operator | Nov 2024 |
| 13041 | Herms, Walter | Luling, TX 78648 | Oil & Gas Operator | Sep 2002 |
| 13042 | Herod, Bill | Ranger, TX 76470 | Oil & Gas Operator | Apr 2022 |
| 13043 | Heron Operating, LLC | | Oil & Gas Operator | Apr 2025 |
| 13044 | Herricks Oil Co. | San Angelo, TX 76906 | Oil & Gas Operator | Jan 2010 |
| 13045 | Herring Production Co | | Oil & Gas Operator | Mar 1992 |
| 13046 | Herring, Casey Oil Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Nov 2008 |
| 13047 | Herring, D Oil & Gas Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Jul 2025 |
| 13048 | Herring, Ray | Graham, TX 76450 | Oil & Gas Operator | Jul 2014 |
| 13049 | Herrman & Ikenberry | Cushing, OK 74023-0247 | Oil & Gas Operator | Dec 2003 |
| 13050 | Herrmann Arnold | Chandler, OK 74834 | Oil & Gas Operator | Sep 2024 |
| 13051 | Herrmann Energy | Amarillo, TX 79159 | Oil & Gas Operator | May 2015 |
| 13052 | Herrmann J B Oil And Gas | Amarillo, TX 79159-0670 | Oil & Gas Operator | Feb 2015 |
| 13053 | Herrmann, J.B. | Amarillo, TX 79159 | Oil & Gas Operator | Aug 2019 |
| 13054 | Herrmann, S. W. Oil & Gas | Amarillo, TX 79159 | Oil & Gas Operator | Jul 2025 |
| 13055 | Herschap Bros. | Bruni, TX 78344 | Oil & Gas Operator | Jul 2025 |
| 13056 | Hershey Oil | Pasadena, CA 91103 | Oil & Gas Operator | Dec 1988 |
| 13057 | Hershey Oil Corporation | Seminole, TX 79360 | Oil & Gas Operator | Jul 1992 |
| 13058 | Hertel Oil Company | | Oil Operator | Nov 2018 |
| 13059 | Hertel Oil Company LLC | Hays, KS 67601 | Oil Operator | Mar 2025 |
| 13060 | Herv Oil, LLC | Oklahoma City, OK 73116 | Oil Operator | Apr 2025 |
| 13061 | Herzfeld Fabricators Inc | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2017 |
| 13062 | Hesperus Energy II LLC | | Oil Operator | Apr 2025 |
| 13063 | Hess Bakken Investments II, LLC | | Oil & Gas Operator | May 2025 |
| 13064 | Hess Bros. DRLG. Co. | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2008 |
| 13065 | Hess Co2 Resources LLC | Seminole, TX 79360 | Gas Operator | Aug 2017 |
| 13066 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 13067 | Hess Corporation, A De Corp. | | Oil & Gas Operator | Oct 2006 |
| 13068 | Hess Ohio Developments LLC | Houston, TX 77010 | Oil & Gas Operator | Sep 2018 |
| 13069 | Hess Ohio Resources LLC | Houston, TX 77010 | Oil & Gas Operator | Jun 2014 |
| 13070 | Hess Oil Company | McPherson, KS 67460 | Oil & Gas Operator | Mar 2025 |
| 13071 | Hess Production | Quitaque, TX 79255 | Oil & Gas Operator | Jul 2025 |
| 13072 | Hess Seminole Assets LLC | Seminole, TX 79360 | Oil & Gas Operator | Aug 2017 |
| 13073 | Hess, Jay E. | Andover, NY 14806 | Oil & Gas Operator | Dec 2024 |
| 13074 | Hess, Jerry Operating Co. | Muenster, TX 76252 | Oil & Gas Operator | Jul 2025 |
| 13075 | Hesse Petroleum Co.,L.L.C. | Wichita, KS 67208 | Oil & Gas Operator | Mar 2025 |
| 13076 | Hessert Edward C | | Oil & Gas Operator | Sep 1993 |
| 13077 | Hessert Loc Inc | Carl Junction, MO 64834 | Oil Operator | Dec 2009 |
| 13078 | Hester Jr J C | Lawton, OK 73502-1887 | Oil & Gas Operator | Oct 1997 |
| 13079 | Hester, Harold & Betty | Bowling Green, KY 42101 | Oil Operator | Dec 2023 |
| 13080 | Heston Oil Company | Tulsa, OK 74108 | Oil & Gas Operator | Mar 2005 |
| 13081 | Hett Oil & Gas, LLC | Lincolnville, KS 66858 | Oil & Gas Operator | Mar 2025 |
| 13082 | Heuston Oil LLC | Bartlesville, OK 74006 | Oil & Gas Operator | Apr 2020 |
| 13083 | Hewitt Energy Group, Inc. | Salt Lake City, UT 84111 | Oil & Gas Operator | Apr 2015 |
| 13084 | Hewitt Oil, LLC | Bolivar, NY 14715 | Oil & Gas Operator | Dec 2024 |
| 13085 | Hewitt, Alan P. | Midland, TX 79702 | Oil & Gas Operator | Aug 1997 |
| 13086 | Hewitt, Douglas R | | Oil Operator | Jul 2024 |
| 13087 | Hewitt, Robert J. | Victoria, TX 77901 | Oil & Gas Operator | Jun 2004 |
| 13088 | Hexadyne Energy Corp. | | Oil & Gas Operator | Dec 2013 |
| 13089 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Jul 2025 |
| 13090 | Hexp Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Jul 2025 |
| 13091 | Heydrick Petroleum Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2025 |
| 13092 | Hez Petroleum Company | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 13093 | HG Energy II Appalachia, LLC | | Oil & Gas Operator | Mar 2022 |
| 13094 | HG Energy LLC | Parkersburg, WV 26101 | Oil & Gas Operator | Dec 2021 |
| 13095 | HG Oil Holdings, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Mar 2025 |
| 13096 | HG Operating LLC | Plano, TX 75026 | Oil & Gas Operator | Jul 2025 |
| 13097 | HGB Oil Company | Denver, CO 80224 | Oil Operator | Mar 2006 |
| 13098 | HGH Energy, Inc. | | Oil & Gas Operator | Jun 2001 |
| 13099 | Hgi Corporation | Nada, TX 77460 | Oil & Gas Operator | Apr 2016 |
| 13100 | HGN Operating Co. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2014 |