| 901 | Heritage Expl. & Prod. Co., Inc. | Stafford, TX 77497 | Oil & Gas Operator | Dec 2000 |
| 902 | Heritage Exploration LLC | Oklahoma City, OK 73120-5622 | Oil & Gas Operator | Jan 2020 |
| 903 | Heritage Gas Corporation | Shreveport, LA 71101 | Gas Operator | Aug 1997 |
| 904 | Heritage Oil Company Inc | Norman, OK 73070 | Oil & Gas Operator | Jul 2008 |
| 905 | Heritage Oil L.L.C. | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 906 | Heritage Operating Co., Inc. The | Stafford, TX 77497 | Oil & Gas Operator | May 1997 |
| 907 | Heritage Petroleum Corporation | Cleburne, TX 76033 | Oil & Gas Operator | Feb 2026 |
| 908 | Heritage Petroleum, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Feb 2026 |
| 909 | Heritage Resources, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Feb 2014 |
| 910 | Heritage Standard Corporation | Dallas, TX 75206 | Oil & Gas Operator | Feb 2026 |
| 911 | Herley Olive Holdings LLC | | Oil & Gas Operator | Dec 2025 |
| 912 | Herley Petroleum | | Oil & Gas Operator | Dec 1997 |
| 913 | Herley-Kelley LLC | | Oil & Gas Operator | Dec 2025 |
| 914 | Herlihy John D. | | Oil & Gas Operator | May 1997 |
| 915 | Herlin Et Al | | Oil & Gas Operator | Mar 1985 |
| 916 | Herlindah Gallegos | | Oil Operator | Dec 2007 |
| 917 | Herman Fields | | Oil & Gas Operator | May 1989 |
| 918 | Herman J Ledbetter | Abilene, TX 79606 | Oil & Gas Operator | Jul 1999 |
| 919 | Herman Krug - Oil Operations | | Oil Operator | Sep 2025 |
| 920 | Herman L Loeb | Lawrenceville, IL 62439 | Oil & Gas Operator | Jul 2009 |
| 921 | Herman L. Loeb LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Sep 2025 |
| 922 | Herman Lang Oil And Gas Co. | | Oil & Gas Operator | Dec 1992 |
| 923 | Herman Riemer Gas Co | Sarver, PA 16055-8507 | Oil & Gas Operator | Dec 2016 |
| 924 | Herman V Wallis | Kerrville, TX 780281858 | Gas Operator | Feb 2003 |
| 925 | Herman'S Supply Company | West Seneca, NY 14224 | Gas Operator | Dec 2024 |
| 926 | Hermat Salt Water Disposal, Inc. | Corpus Chrsti, TX 78426 | Oil Operator | Aug 2012 |
| 927 | Hermes, A. J. | Lindsay, TX 76250 | Oil & Gas Operator | Mar 2018 |
| 928 | Hermreck Oil Com | | Oil & Gas Operator | Aug 1996 |
| 929 | Hermreck Oil Company | | Oil Operator | Nov 2024 |
| 930 | Herms, Walter | Luling, TX 78648 | Oil & Gas Operator | Sep 2002 |
| 931 | Herndon Drilling | | Oil & Gas Operator | May 1988 |
| 932 | Herod Investments, Inc. | Ranger, TX 76470 | Oil & Gas Operator | Jul 1999 |
| 933 | Herod, Bill | Ranger, TX 76470 | Oil & Gas Operator | Apr 2022 |
| 934 | Heron Operating, LLC | | Oil & Gas Operator | Dec 2025 |
| 935 | Herricks Oil Co. | San Angelo, TX 76906 | Oil & Gas Operator | Jan 2010 |
| 936 | Herring Production Co | | Oil & Gas Operator | Mar 1992 |
| 937 | Herring, Casey Oil Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Nov 2008 |
| 938 | Herring, D Oil & Gas Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Feb 2026 |
| 939 | Herring, Ray | Graham, TX 76450 | Oil & Gas Operator | Jul 2014 |
| 940 | Herrman & Ikenberry | Cushing, OK 74023-0247 | Oil & Gas Operator | Dec 2003 |
| 941 | Herrmann Arnold | Chandler, OK 74834 | Oil & Gas Operator | Sep 2024 |
| 942 | Herrmann Energy | Amarillo, TX 79159 | Oil & Gas Operator | May 2015 |
| 943 | Herrmann J B Oil And Gas | Amarillo, TX 79159-0670 | Oil & Gas Operator | Feb 2015 |
| 944 | Herrmann, J.B. | Amarillo, TX 79159 | Oil & Gas Operator | Aug 2019 |
| 945 | Herrmann, S. W. Oil & Gas | Amarillo, TX 79159 | Oil & Gas Operator | Feb 2026 |
| 946 | Herschap Bros. | Bruni, TX 78344 | Oil & Gas Operator | Feb 2026 |
| 947 | Hershey Oil | Pasadena, CA 91103 | Oil & Gas Operator | Dec 1988 |
| 948 | Hershey Oil Corporation | | Oil & Gas Operator | Jul 1992 |
| 949 | Hertel Oil Company | | Oil Operator | Nov 2018 |
| 950 | Hertel Oil Company LLC | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 951 | Herv Oil, LLC | Oklahoma City, OK 73116 | Oil Operator | Dec 2025 |
| 952 | Herzfeld Fabricators Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2017 |
| 953 | Hesperus Energy II LLC | | Oil Operator | Oct 2025 |
| 954 | Hess Bakken Investments II, LLC | | Oil & Gas Operator | Dec 2025 |
| 955 | Hess Bros. DRLG. Co. | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2008 |
| 956 | Hess Co2 Resources LLC | Seminole, TX 79360 | Gas Operator | Aug 2017 |
| 957 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 958 | Hess Corporation, A De Corp. | | Oil & Gas Operator | Oct 2006 |
| 959 | Hess Ohio Developments LLC | Houston, TX 77010 | Oil & Gas Operator | Sep 2018 |
| 960 | Hess Ohio Resources LLC | Houston, TX 77010 | Oil & Gas Operator | Jun 2014 |
| 961 | Hess Oil Company | McPherson, KS 67460 | Oil & Gas Operator | Sep 2025 |
| 962 | Hess Production | Quitaque, TX 79255 | Oil & Gas Operator | Feb 2026 |
| 963 | Hess Seminole Assets LLC | Seminole, TX 79360 | Oil & Gas Operator | Aug 2017 |
| 964 | Hess, Jay E. | Andover, NY 14806 | Oil & Gas Operator | Dec 2024 |
| 965 | Hess, Jerry Operating Co. | Muenster, TX 76252 | Oil & Gas Operator | Feb 2026 |
| 966 | Hesse Petroleum Co.,L.L.C. | Wichita, KS 67208 | Oil & Gas Operator | Sep 2025 |
| 967 | Hessert Edward C | | Oil & Gas Operator | Sep 1993 |
| 968 | Hessert Loc Inc | Carl Junction, MO 64834 | Oil Operator | Dec 2009 |
| 969 | Hester Jr J C | Lawton, OK 73502-1887 | Oil & Gas Operator | Oct 1997 |
| 970 | Hester, Harold & Betty | Bowling Green, KY 42101 | Oil Operator | Dec 2023 |
| 971 | Heston Oil Company | Tulsa, OK 74108 | Oil & Gas Operator | Mar 2005 |
| 972 | Hetricks Farm Sply Inc | New Bethlehem, PA 16242-1832 | Gas Operator | Dec 2025 |
| 973 | Hett Oil & Gas, LLC | Lincolnville, KS 66858 | Oil & Gas Operator | Sep 2025 |
| 974 | Heuston Oil LLC | Bartlesville, OK 74006 | Oil & Gas Operator | Apr 2020 |
| 975 | Hewitt Energy Group Inc | Salt Lake City, UT 84111 | Oil & Gas Operator | Apr 2015 |
| 976 | Hewitt Oil, LLC | Bolivar, NY 14715 | Oil & Gas Operator | Dec 2024 |
| 977 | Hewitt, Alan P. | Midland, TX 79702 | Oil & Gas Operator | Aug 1997 |
| 978 | Hewitt, Douglas R | | Oil Operator | Nov 2025 |
| 979 | Hewitt, Robert J. | Victoria, TX 77901 | Oil & Gas Operator | Jun 2004 |
| 980 | Hexadyne Energy Corp. | | Oil & Gas Operator | Dec 2013 |
| 981 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Feb 2026 |
| 982 | Hexp Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 983 | Heydrick Petroleum Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 984 | Hez Petroleum Company | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 985 | HG Energy II Appalachia, LLC | | Oil & Gas Operator | Mar 2022 |
| 986 | HG Energy LLC | Parkersburg, WV 26101 | Oil & Gas Operator | Dec 2021 |
| 987 | HG Oil Holdings, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Sep 2025 |
| 988 | HG Operating LLC | Plano, TX 75026 | Oil & Gas Operator | Feb 2026 |
| 989 | HGH Energy, Inc. | | Oil & Gas Operator | Jun 2001 |
| 990 | Hgi Corporation | Nada, TX 77460 | Oil & Gas Operator | Apr 2016 |
| 991 | HGN Operating Company, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2014 |
| 992 | HGN Operating I, LLC | Abilene, TX 79604 | Oil & Gas Operator | Feb 2026 |
| 993 | HH&F Partners | Katy, TX 77450 | Oil & Gas Operator | Sep 2019 |
| 994 | HHH & G Oil Co | Owasso, OK 74055 | Oil Operator | Jun 2020 |
| 995 | HHL Development Inc | Garber, OK 73738 | Oil & Gas Operator | Nov 2025 |
| 996 | Hi - Mountain Energy Corporation | Odessa, TX 79762 | Oil & Gas Operator | Feb 2026 |
| 997 | Hi Plains Hydrocarbons, Inc. | Sunray, TX 79086 | Oil & Gas Operator | Oct 2002 |
| 998 | Hi Snyder/Snyder Oil & Gas Inc | Dover, OH 44622 | Oil & Gas Operator | Dec 2019 |
| 999 | Hi-Energy Gas Company, LLC | Salyersville, KY 41465 | Gas Operator | Dec 2023 |
| 1000 | Hi-Kat Petroleum | | Oil Operator | Mar 1990 |