| 1001 | Estate Of William G. Helis | | Oil & Gas Operator | May 1994 |
| 1002 | Estate Oil & Gas Corp. | Dallas, TX 75206 | Oil & Gas Operator | Oct 2011 |
| 1003 | Estes And Company LLC. | Perryton, TX 79070 | Oil & Gas Operator | Dec 2025 |
| 1004 | Estes Operating, Inc. | San Antonio, TX 78210 | Oil & Gas Operator | Mar 2002 |
| 1005 | Estes Operating, LLC | La Porte, TX 77571 | Oil & Gas Operator | Dec 2025 |
| 1006 | Estoril Producing Corporation | Midland, TX 79701 | Oil & Gas Operator | Apr 1994 |
| 1007 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 1008 | Etc Field Services LLC | San Antonio, TX 78258 | Oil Operator | Jun 2018 |
| 1009 | Etc Oil Co. | Pecos, TX 79772 | Oil & Gas Operator | Mar 2004 |
| 1010 | Etc Oil Corp | | Oil & Gas Operator | Mar 1994 |
| 1011 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 1012 | Etchegoin Oil LLC | | Oil & Gas Operator | Oct 2025 |
| 1013 | Etd Oil Co. | | Oil Operator | Oct 1990 |
| 1014 | Eternity Exploration, LLC | Coppell, TX 75019 | Oil Operator | Feb 2025 |
| 1015 | Ethredge & Rhoads Oil Company | | Oil Operator | Dec 2012 |
| 1016 | Ethredge Oil Company | | Oil & Gas Operator | Aug 1998 |
| 1017 | Ethyl Gas Company, LLC | | Oil Operator | Jan 2025 |
| 1018 | Ethyl Properties Inc | | Oil & Gas Operator | Aug 1989 |
| 1019 | Ethyl-Buchanan | | Oil & Gas Operator | Feb 1987 |
| 1020 | Etl Hydrocarbons, Inc. | Andrews, TX 79714 | Oil & Gas Operator | Dec 2025 |
| 1021 | Etm Operating Company, Inc. | Houston, TX 77079 | Oil Operator | Feb 2009 |
| 1022 | Etoco Incorporated | Houston, TX 77002 | Oil & Gas Operator | May 2005 |
| 1023 | Etoco, L.P. | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 1024 | Etopsi Oil And Gas, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 1025 | Etos Operating, Inc. | New London, TX 75682 | Oil & Gas Operator | Dec 2025 |
| 1026 | Ettco Enterprises, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2024 |
| 1027 | Etter Road Investments LLC | Erie, PA 16505-1352 | Gas Operator | Dec 2024 |
| 1028 | Etx Energy, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2022 |
| 1029 | Eubank Michael Dba Trilby Oil Company | Amber, OK 73004-4903 | Oil Operator | May 2022 |
| 1030 | Eubank Operating Company | Cushing, OK 74023 | Oil & Gas Operator | Aug 2024 |
| 1031 | Eubank, Robert B. & B. K. | Spring, TX 77388 | Oil & Gas Operator | Mar 2008 |
| 1032 | Eucutta Petroleum Inc. | | Oil & Gas Operator | Sep 2000 |
| 1033 | Eufaula Enterpri | | Oil & Gas Operator | Mar 1986 |
| 1034 | Eugene E. Marble | | Oil Operator | Dec 1981 |
| 1035 | Eugene Talbert Operating Co. | | Oil & Gas Operator | Mar 2013 |
| 1036 | Eunice Well Service Inc | Eunice, NM 88231 | Oil & Gas Operator | Jan 2000 |
| 1037 | Euram Petroleum | | Oil Operator | Apr 1986 |
| 1038 | Euratex Corp | Glade Park, CO 81523 | Oil & Gas Operator | Sep 1996 |
| 1039 | Eureka Expl Co, Inc | | Oil Operator | Dec 2013 |
| 1040 | Eureka Gas Co, Inc | Pikeville, KY 41502 | Gas Operator | Dec 2010 |
| 1041 | Eureka Oil And Gas LLC | Columbus, OH 43230 | Oil Operator | Dec 2020 |
| 1042 | Eureka Prospecting Company | Wimberley, TX 78676 | Oil & Gas Operator | Jun 2023 |
| 1043 | Euroamerican Energy Group Inc | | Oil & Gas Operator | Oct 1993 |
| 1044 | Euroamerican Pet Corp | Columbus, OH 43229 | Gas Operator | Dec 1991 |
| 1045 | Euromin Canada, Inc. | | Oil & Gas Operator | Mar 1987 |
| 1046 | European-Southwest Co. | Houston, TX 77254 | Oil & Gas Operator | Dec 2025 |
| 1047 | Eurotex Royalty, Inc. | Arlington, TX 76012 | Oil & Gas Operator | Aug 2003 |
| 1048 | Eurovest Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 1049 | Ev Fleming Enterprises, LLC | Kilgore, TX 75662 | Oil & Gas Operator | Aug 2024 |
| 1050 | Evan Energy Co, LC | | Gas Operator | Dec 2013 |
| 1051 | Evanco Inc | Cleveland, OH 44115 | Oil & Gas Operator | Dec 1987 |
| 1052 | Evangelical Free Church | | Oil & Gas Operator | Dec 1987 |
| 1053 | Evangeline Natural Resources, LLC | | Oil & Gas Operator | Jan 2025 |
| 1054 | Evangeline Oil Prod. Co., Inc. | | Oil Operator | Apr 2001 |
| 1055 | Evangeline Operating Co., Inc. | | Oil Operator | Jun 1989 |
| 1056 | Evangeline Pumpers, Inc. | | Oil & Gas Operator | Jul 2005 |
| 1057 | Evangeline Trading Company | Ballinger, TX 76821 | Oil & Gas Operator | Dec 2025 |
| 1058 | Evans Brothers | | Oil & Gas Operator | Jan 2025 |
| 1059 | Evans Douglas G | | Oil Operator | Aug 1987 |
| 1060 | Evans Energy, LLC | Mount Hope, KS 67108 | Oil & Gas Operator | Jun 2025 |
| 1061 | Evans Jay Oil Co | Iola, KS 66749 | Oil Operator | Apr 2001 |
| 1062 | Evans John Roy | | Oil Operator | Nov 1992 |
| 1063 | Evans Oil Company Inc | Eunice, NM 88231 | Oil & Gas Operator | Feb 2007 |
| 1064 | Evans Oil D W - | | Oil Operator | Mar 1992 |
| 1065 | Evans Oil Inc. | Lebo, KS 66856 | Oil Operator | Jun 2025 |
| 1066 | Evans Production Co. | Pampa, TX 79066 | Oil & Gas Operator | Sep 2020 |
| 1067 | Evans Well Service | | Oil Operator | Oct 2013 |
| 1068 | Evans, Carl N. | Graham, TX 76450 | Oil & Gas Operator | Feb 2001 |
| 1069 | Evans, Glenn A. | Paola, KS 66071 | Oil Operator | Oct 1989 |
| 1070 | Evans, Julian | Houston, TX 77024 | Oil & Gas Operator | Nov 1995 |
| 1071 | Evans, Ralph | San Antonio, TX 78209 | Oil & Gas Operator | Jan 2011 |
| 1072 | Evans, S. Lavon Jr. Oper. Co. | Laurel, MS 39442 | Oil & Gas Operator | Dec 2025 |
| 1073 | Evans-Brant (Lake Shore) Central School District | Angola, NY 14006 | Gas Operator | Dec 2024 |
| 1074 | Evantech Energy Corp. | Fort Worth, TX 76120 | Oil & Gas Operator | Apr 1995 |
| 1075 | Evarado Oil Company | Strawn, TX 76475 | Oil & Gas Operator | Dec 2025 |
| 1076 | Evarado Oil, LLC | Strawn, TX 76475 | Oil & Gas Operator | Dec 2025 |
| 1077 | Evenson Oil Oper | | Oil Operator | Nov 1991 |
| 1078 | Everest Minerals Corp. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Apr 2001 |
| 1079 | Everest Network LLC | Eastland, TX 76448 | Oil & Gas Operator | Dec 2025 |
| 1080 | Everest Oil & Gas LLC | Santa Barbara, CA 93101 | Oil Operator | Oct 2025 |
| 1081 | Everest Resource Company | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Dec 2025 |
| 1082 | Everett Oil | San Antonio, TX 78258 | Oil & Gas Operator | Apr 2015 |
| 1083 | Everett Oil, Inc. | San Antonio, TX 78258 | Oil Operator | Dec 2025 |
| 1084 | Everett, Jack T | | Oil Operator | Apr 2007 |
| 1085 | Everett, Joe Mack | Throckmorton, TX 76483 | Oil & Gas Operator | Dec 2025 |
| 1086 | Everflow Eastern Inc | Canfield, OH 44406-0629 | Oil & Gas Operator | Dec 2024 |
| 1087 | Everflow Eastern Partners LP | Canfield, OH 44406 | Oil & Gas Operator | Dec 2024 |
| 1088 | Everglow Energy, LLC | Oklahoma City, OK 73162 | Oil & Gas Operator | Jun 2025 |
| 1089 | Evergreen Energy, Inc | Houston, TX 77098 | Oil & Gas Operator | Dec 2025 |
| 1090 | Evergreen Natural Resources LLC | | Gas Operator | Oct 2025 |
| 1091 | Evergreen Operating Co., LTD. | McAllen, TX 78502 | Oil & Gas Operator | Dec 2025 |
| 1092 | Evergreen Operating Company | Denver, CO 80202 | Oil & Gas Operator | Apr 1996 |
| 1093 | Evergreen Operating Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
| 1094 | Evergreen Resource Co | Warren, PA 16365-4321 | Oil & Gas Operator | Dec 2024 |
| 1095 | Everman, Henry G. | Dansville, NY 14437 | Gas Operator | Dec 2024 |
| 1096 | Everquest Energy Corporation | Fredericksbrg, TX 78624 | Oil & Gas Operator | Sep 2025 |
| 1097 | Evertson Oil Company Inc | Kimball, NE 69145 | Oil & Gas Operator | Sep 2001 |
| 1098 | Evertson Operating Company Inc | Kimball, NE 69145 | Oil & Gas Operator | Nov 2022 |
| 1099 | Evinger, Ernest E. | Midland, TX 79705 | Oil & Gas Operator | Mar 2002 |
| 1100 | Evolution Energy LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Oct 2025 |