| 801 | Ensminger D & J | | Oil Operator | Dec 1994 |
| 802 | Ensminger Energy LLC | Moran, KS 66755 | Oil Operator | Mar 2026 |
| 803 | Ensminger Oil, LLC | Moran, KS 66755 | Oil Operator | Mar 2026 |
| 804 | Ensminger, Donald & Jack, A General Partnership | Moran, KS 66755 | Oil Operator | Jun 2005 |
| 805 | Ensource Inc | Midland, TX 79705 | Oil & Gas Operator | Aug 1998 |
| 806 | Enstar Corporation | Houston, TX 77252 | Oil & Gas Operator | Apr 1988 |
| 807 | Enstar Energy, Inc. | Arlington, TX 76003 | Oil & Gas Operator | Jul 2026 |
| 808 | Enstar Petroleum Company | | Oil & Gas Operator | Aug 1985 |
| 809 | Enstar Petroleum Inc | | Oil & Gas Operator | Apr 1985 |
| 810 | Ensz, Jerry | Sublette, KS 67877 | Gas Operator | Mar 2026 |
| 811 | Entek GRB LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2021 |
| 812 | Enterprise Energy Corp | Cambridge, OH 43725 | Oil & Gas Operator | Dec 1985 |
| 813 | Enterprise Energy Exploration Inc | Tulsa, OK 74133-6724 | Oil & Gas Operator | May 2026 |
| 814 | Enterprise Energy Prod Co Inc | Tulsa, OK 74133-6754 | Oil & Gas Operator | Mar 2015 |
| 815 | Enterprise Exploration Inc | Tulsa, OK 74133 | Oil & Gas Operator | Nov 2020 |
| 816 | Enterprise Gathering LLC | | Oil Operator | Dec 2024 |
| 817 | Enterprise Inc | Hays, KS 67601 | Oil Operator | Sep 2015 |
| 818 | Enterprise Marke | | Oil & Gas Operator | Oct 1992 |
| 819 | Enterprise Oil Marketing Corp. | Little Rock, AR 72206 | Oil Operator | Sep 1998 |
| 820 | Enterprise Resources Inc. | | Oil & Gas Operator | Jun 1979 |
| 821 | Enterprising Enterprises Inc | Tulsa, OK 74137 | Oil Operator | Jun 2009 |
| 822 | Enterra Resources, LLC | Edmond, OK 73083 | Oil & Gas Operator | Mar 2026 |
| 823 | Entex Oil Company | | Gas Operator | Dec 1993 |
| 824 | Entex Petroleum Inc | Oklahoma City, OK 73113 | Oil & Gas Operator | Nov 1997 |
| 825 | Entex, Inc. | | Oil & Gas Operator | Dec 1984 |
| 826 | Entransco Energy LLC | Dewey, OK 74029 | Oil & Gas Operator | Oct 2024 |
| 827 | Enveron Corporation | Portage, MI 49024 | Oil & Gas Operator | Dec 2017 |
| 828 | Envirogas Inc | Hamburg, NY 14075 | Oil & Gas Operator | Dec 1992 |
| 829 | Environmental BR Ser Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 1987 |
| 830 | Environmental Exp Co | North Canton, OH 44720 | Oil & Gas Operator | Dec 1998 |
| 831 | Environmental Oil Co | Thornville, OH 43076 | Oil & Gas Operator | Dec 2024 |
| 832 | Environmental Soil Recovery LTD | | Oil Operator | Apr 2026 |
| 833 | Envirosearch Corporation | | Oil Operator | Dec 1992 |
| 834 | Envirotek Fuel Systems Inc | Dallas, TX 75243 | Oil & Gas Operator | May 2013 |
| 835 | Enwest Resources, Inc. | Midland, TX 79705 | Oil & Gas Operator | Aug 1994 |
| 836 | EOG (Oklahoma) Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Oct 2016 |
| 837 | EOG A Resources, Inc. | Artesia, NM 88210 | Oil & Gas Operator | Dec 2018 |
| 838 | EOG M Resources, Inc. | Artesia, NM 88211 | Oil & Gas Operator | Dec 2018 |
| 839 | EOG Ohio, LLC | New Albany, OH 43054-2646 | Oil & Gas Operator | Mar 2026 |
| 840 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Jul 2026 |
| 841 | EOG Y Resources Inc | Artesia, NM 88210 | Oil & Gas Operator | Feb 2019 |
| 842 | Eok Operating LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | May 2026 |
| 843 | Eor LLC | | Oil & Gas Operator | Nov 2013 |
| 844 | Eor Operating Company | Houston, TX 77079 | Oil & Gas Operator | Jul 2026 |
| 845 | Eos Energy LLC | Columbus, OH 43026 | Oil & Gas Operator | Dec 2025 |
| 846 | Eott Energy Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 1995 |
| 847 | Eott Energy Operating LP | Houston, TX 77210-4666 | Oil & Gas Operator | Oct 2009 |
| 848 | EP Energy E&P Company, LLC | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 849 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | Jan 2023 |
| 850 | EP Operating Co, A LTD Ptrship | | Oil & Gas Operator | Oct 1992 |
| 851 | EP Operating Co. | Dallas, TX 75201 | Oil & Gas Operator | Jan 1993 |
| 852 | EP Operating Company LP | Midland, TX 79705-5510 | Oil & Gas Operator | Mar 1993 |
| 853 | EP Operating Limited Partnership | Dallas, TX 75201 | Oil & Gas Operator | Feb 1995 |
| 854 | EP Operating LP | Dallas, TX 75201 | Oil & Gas Operator | Mar 2015 |
| 855 | EP&W | | Oil Operator | Dec 1997 |
| 856 | Epic Energy, L.L.C. | Aztec, NM 87410 | Oil & Gas Operator | May 2026 |
| 857 | Epic Permian Operating, LLC | Arvada, CO 80006 | Oil & Gas Operator | Jan 2025 |
| 858 | Epl Oil & Gas, Inc | | Oil & Gas Operator | Aug 2015 |
| 859 | Epley Bobbie Inc | Wilson, OK 73463-6319 | Oil Operator | Jun 2007 |
| 860 | Epoc, LLC | Andover, KS 67002 | Oil Operator | Mar 2026 |
| 861 | Epoch Petroleum Corporation | | Oil & Gas Operator | Dec 1992 |
| 862 | Epoch Resources Of Texas Inc | Port Aransas, TX 78373-1637 | Oil & Gas Operator | Nov 2014 |
| 863 | Epperson Dwight | Okemah, OK 74859 | Oil Operator | Jan 2013 |
| 864 | Epperson John R | Bartlesville, OK 74003 | Oil Operator | Aug 1999 |
| 865 | Eps Resources Corp | Englewood, CO 80111 | Oil & Gas Operator | Dec 2009 |
| 866 | Epstein Jr Oper Co | | Oil & Gas Operator | Mar 1991 |
| 867 | Epstein, Edwin A Jr Oper Co Inc | Las Vegas, NV 89128 | Gas Operator | Dec 2001 |
| 868 | Eqt Aro LLC | Canonsburg, PA 15317-1000 | Gas Operator | Apr 2026 |
| 869 | Eqt Chap, LLC | Canonsburg, PA 15317-1000 | Oil & Gas Operator | Apr 2026 |
| 870 | Eqt Production Company | Pittsburg, PA 15222 | Oil & Gas Operator | Apr 2026 |
| 871 | Eqt Production Texas, LLC | Pittsburgh, PA 15222 | Oil & Gas Operator | Jun 2018 |
| 872 | Equal Energy Us Inc | Tulsa, OK 74103-4621 | Oil & Gas Operator | Nov 2019 |
| 873 | Equinor Energy LP | Austin, TX 78730 | Oil & Gas Operator | Oct 2021 |
| 874 | Equinor USA Onshore Properties Inc. | Houston, TX 77042 | Oil & Gas Operator | Mar 2024 |
| 875 | Equinox Oil Comp | | Oil Operator | Dec 1996 |
| 876 | Equinox Oil Company Inc | Plainville, KS 67663 | Oil & Gas Operator | Dec 2019 |
| 877 | Equipment Lott Inc The | Hennessey, OK 73742-0655 | Oil & Gas Operator | Mar 2008 |
| 878 | Equipment, Inc. | | Oil & Gas Operator | Mar 1983 |
| 879 | Equitable Gas Company | Pittsburgh, PA 15212-5352 | Gas Operator | Dec 2013 |
| 880 | Equitable Petroleum Corp. | | Oil & Gas Operator | Jan 1999 |
| 881 | Equitable Prod Eastern States Exploration Inc | Snow Shoe, PA 16874-0178 | Gas Operator | Dec 2001 |
| 882 | Equitable Production Company | Charleston, WV 25302 | Oil & Gas Operator | Dec 2007 |
| 883 | Equitable Resources Energy | Houston, TX 77056-2742 | Oil & Gas Operator | Sep 1997 |
| 884 | Equitable Resources Energy Co, Western Region | Billings, MT 59102 | Oil & Gas Operator | May 1997 |
| 885 | Equitable Resources Energy Company | Big Stone Gap, VA 24219 | Oil & Gas Operator | Dec 1997 |
| 886 | Equitrans Inc | Cannonsburg, PA 15317 | Oil & Gas Operator | Dec 2018 |
| 887 | Equitrans, L. P. | Canonsburg, PA 15317 | Oil & Gas Operator | Jul 2021 |
| 888 | Equity Drilling Company Inc | Dewey, OK 74029 | Oil & Gas Operator | Nov 1998 |
| 889 | Equity Export Oil & Gas Co Inc | Kansas City, MO 64116 | Oil & Gas Operator | Feb 2002 |
| 890 | Equity Oil & Gas Funds Inc | Orlando, FL 32837-6103 | Oil & Gas Operator | Dec 2025 |
| 891 | Equity Oil Company | Salt Lake City, UT 84110-095 | Oil & Gas Operator | Aug 2004 |
| 892 | Eqv Operating LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | Jul 2026 |
| 893 | Eram, Inc. | | Oil & Gas Operator | Dec 2024 |
| 894 | Eratz Investments Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jul 2026 |
| 895 | Erbe, Dwayne E. (Estate) | Neodesha, KS 66757 | Oil Operator | Mar 2026 |
| 896 | Erbert Don Oil C | | Oil Operator | May 1993 |
| 897 | Erbert, Harold | Iola, KS 66749 | Oil Operator | Dec 1992 |
| 898 | Erebor Resources, LLC | Tyler, TX 75702 | Oil & Gas Operator | Dec 2025 |
| 899 | Ereunao Oil & Gas, Inc. | | Oil & Gas Operator | Mar 2003 |
| 900 | Erg Operating Company Inc | Houston, TX 77002 | Oil & Gas Operator | Dec 2006 |