| 1001 | BHP Billiton Petro (Txla Operating) Co. | | Gas Operator | Jul 2019 |
| 1002 | BHP Billiton Petro (WSF Operating), Inc. | | Oil & Gas Operator | Jul 2019 |
| 1003 | BHP Petroleum (Americas) | Houston, TX 77056-3020 | Oil & Gas Operator | Mar 1993 |
| 1004 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 1005 | BHP Petroleum (USA) Inc | | Oil & Gas Operator | Mar 1993 |
| 1006 | BHP Petroleum Company Inc | Houston, TX 77057 | Oil & Gas Operator | Jun 2016 |
| 1007 | BHP Petroleum, Inc. | | Oil & Gas Operator | Aug 1985 |
| 1008 | Bi Joe Development Inc | Columbus, OH 43220 | Oil & Gas Operator | Dec 2024 |
| 1009 | Bialek Oil And Gas Corporation | Harrisville, WV 26362 | Oil & Gas Operator | Dec 2021 |
| 1010 | Biblical Life Inst | Freeport, PA 16229 | Gas Operator | Dec 2024 |
| 1011 | Bibs Oil Corpora | | Oil & Gas Operator | Apr 1987 |
| 1012 | Bickham G C Inc | Ada, OK 74820-8304 | Oil Operator | Jun 2017 |
| 1013 | Bickle Energies LLC | Hays, KS 67601 | Oil Operator | Dec 2019 |
| 1014 | Biddy Audrian Q | Okemah, OK 74859 | Oil & Gas Operator | Aug 2013 |
| 1015 | Bieberle Oil & Gas Inc. | Medicine Lodge, KS 67104 | Oil & Gas Operator | Jun 2025 |
| 1016 | Biedenharn Et Al | | Gas Operator | Nov 1996 |
| 1017 | Biehl Oil Service'S LLC | Bellevue, TX 76228 | Oil & Gas Operator | Nov 2017 |
| 1018 | Biffle SR Bob | Duncan, OK 73533 | Oil & Gas Operator | Nov 1998 |
| 1019 | Biffle, Jimmy Jack | Muenster, TX 76252 | Oil & Gas Operator | Feb 2017 |
| 1020 | Big "6" Drilling Company | Houston, TX 77063 | Oil & Gas Operator | Mar 2019 |
| 1021 | Big 'J' Prod Com | | Oil & Gas Operator | Aug 1992 |
| 1022 | Big 'O' | | Oil Operator | Jun 2025 |
| 1023 | Big Al Oil And Gas | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 1024 | Big Basin Petroleum LLC | Gillette, WY 82717 | Oil & Gas Operator | Oct 2008 |
| 1025 | Big Bear Resourc | | Oil Operator | Jan 1989 |
| 1026 | Big Bend Oil Co | Hominy, OK 74035 | Oil & Gas Operator | Jul 2025 |
| 1027 | Big C Production & Processing, Inc. | Crown City, OH 45623 | Oil & Gas Operator | Dec 2021 |
| 1028 | Big Chief Exploration | Palisades, CO 81526 | Oil & Gas Operator | Oct 1993 |
| 1029 | Big Country Pipe & Supply, Inc. | Saint Jo, TX 76265 | Oil Operator | May 2023 |
| 1030 | Big Creek Energy LLC | Kingfisher, OK 73750-3102 | Oil & Gas Operator | Sep 2025 |
| 1031 | Big Creek Operating Company LLC | Houston, TX 77065 | Oil & Gas Operator | Dec 2025 |
| 1032 | Big Creek Operating, Inc. | | Oil & Gas Operator | Jan 1991 |
| 1033 | Big D Energy Company | New Braunfels, TX 78132 | Oil & Gas Operator | Dec 2025 |
| 1034 | Big Dog Energy LLC | Sewickley, PA 15143-8782 | Gas Operator | Sep 2025 |
| 1035 | Big Easy Operating Company | Houston, TX 77056 | Oil & Gas Operator | Aug 2003 |
| 1036 | Big Eight DRLG Co | | Oil Operator | Dec 2023 |
| 1037 | Big Eight Energy | El Dorado, KS 67042 | Oil Operator | Apr 2001 |
| 1038 | Big Eight Energy, L.L.C. | Wichita, KS 67275 | Oil Operator | Dec 2009 |
| 1039 | Big Four Leasing & Operating Inc | Cushing, OK 74023 | Oil & Gas Operator | Aug 2025 |
| 1040 | Big Four Petroleum Company | Cushing, OK 74023 | Oil & Gas Operator | Nov 2004 |
| 1041 | Big G Exploration, Inc. | | Oil Operator | Mar 1988 |
| 1042 | Big Heart Oil Company, LLC | Smackover, AR 71762 | Oil Operator | Jan 2025 |
| 1043 | Big Horn Oil And Gas Inc. | | Gas Operator | Sep 2025 |
| 1044 | Big Horn Oil Co Inc | Great Bend, KS 67530 | Oil & Gas Operator | May 2013 |
| 1045 | Big Iron Excavation, L.L.C. | Blanket, TX 76432 | Oil Operator | Jan 2022 |
| 1046 | Big Island Operating Corp. | | Oil & Gas Operator | Aug 1988 |
| 1047 | Big J Tank Truck Service Inc | Perry, OK 73077-1238 | Oil Operator | Apr 2014 |
| 1048 | Big Jack Oil & G | | Oil Operator | Sep 1986 |
| 1049 | Big Lake Corporation | Dallas, TX 75222 | Oil & Gas Operator | Dec 2025 |
| 1050 | Big Lake J J Oil & Gas, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Dec 2025 |
| 1051 | Big Lime Energy LTD | Medford, OK 73759-0009 | Oil & Gas Operator | Mar 2015 |
| 1052 | Big M Oil Company | | Oil & Gas Operator | Jan 2025 |
| 1053 | Big Man Oil Co, Inc | Owensboro, KY 42302 | Oil & Gas Operator | Dec 2023 |
| 1054 | Big Mountain Operating LLC | Decatur, TX 76234 | Oil & Gas Operator | Dec 2025 |
| 1055 | Big Muddy Operating LLC | Casper, WY 82602 | Oil Operator | Sep 2025 |
| 1056 | Big Pine Petroleum Inc. | | Oil & Gas Operator | Dec 2024 |
| 1057 | Big Piney Oil & Gas Company | Dallas, TX 75206 | Oil & Gas Operator | Sep 1992 |
| 1058 | Big River Oil Field Services, LLC | | Oil Operator | Mar 2017 |
| 1059 | Big Rock Oil LLC | Frisco, TX 75034 | Oil Operator | Dec 2025 |
| 1060 | Big Run Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 1061 | Big Sand Drilling Company | Buckhannon, WV 26201-0000 | Oil & Gas Operator | Dec 2021 |
| 1062 | Big Shell Oil & Gas, Inc. | Taft, TX 78390 | Oil & Gas Operator | Dec 2025 |
| 1063 | Big Sky Energy Inc | New Concord, OH 43762 | Oil & Gas Operator | Dec 2024 |
| 1064 | Big Sky Energy, LLC | Cody, WY 82414 | Oil & Gas Operator | May 2024 |
| 1065 | Big Sky Exploration LLC | Dana Point, CA 92629-2889 | Oil Operator | Apr 2020 |
| 1066 | Big Sky Gas Co. | Tribune, KS 67879 | Gas Operator | Dec 2001 |
| 1067 | Big Sky Oil Company | Nowata, OK 74048-0187 | Oil & Gas Operator | Mar 2015 |
| 1068 | Big Sky Production Co Inc | Perry, OK 73077 | Oil & Gas Operator | May 2006 |
| 1069 | Big Sky Well Service, Inc. | | Oil & Gas Operator | Aug 2018 |
| 1070 | Big Snowy Resources LP | Billings, MT 59105 | Oil Operator | Sep 2025 |
| 1071 | Big Star Exploration | Fort Worth, TX 76121 | Oil & Gas Operator | Dec 2025 |
| 1072 | Big Star Investments, LLC | Fort Worth, TX 76121 | Oil & Gas Operator | Sep 2025 |
| 1073 | Big Star Oil & Gas, LLC | Midland, TX 79710 | Oil & Gas Operator | Sep 2017 |
| 1074 | Big State Industries, Inc. | Houston, TX 77010 | Oil & Gas Operator | Apr 2024 |
| 1075 | Big Three Oil Company | Windthorst, TX 76389 | Oil & Gas Operator | Jul 2006 |
| 1076 | Big Ticket, LLC | Lawrence, KS 66047 | Oil Operator | Mar 2025 |
| 1077 | Big Tio, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Dec 2025 |
| 1078 | Big Top Oil & Gas LLC | Lambertville, MI 48144 | Oil Operator | Dec 2023 |
| 1079 | Big Valley Resources | | Oil Operator | Dec 2008 |
| 1080 | Big W Oil Company | Graham, TX 76450 | Oil & Gas Operator | May 2017 |
| 1081 | Big Wells Energy Corp | Katy, TX 77494 | Oil & Gas Operator | Sep 2019 |
| 1082 | Big West Of California LLC | | Oil & Gas Operator | Dec 2018 |
| 1083 | Big-Joe Operating, Co. | | Oil & Gas Operator | May 2017 |
| 1084 | Bigfoot Energy Services LLC | Carthage, TX 75633 | Oil & Gas Operator | Aug 2024 |
| 1085 | Bigfoot Oil LLC | Denver, CO 80206 | Oil Operator | Dec 2025 |
| 1086 | Biggs Jerrold L | Newark, OH 43055 | Oil & Gas Operator | Dec 2024 |
| 1087 | Biggs Resources, Inc. | | Oil Operator | Apr 1984 |
| 1088 | Biggs, Laura L | | Oil & Gas Operator | Jul 2019 |
| 1089 | Biggy'S Petroleum | | Oil & Gas Operator | May 2025 |
| 1090 | Bigiron Oil & Gas LLC | | Oil & Gas Operator | Oct 2025 |
| 1091 | Biglane Operating Company | | Oil & Gas Operator | Aug 2025 |
| 1092 | Bike Oil & Gas Company, Inc. | | Oil & Gas Operator | Aug 2002 |
| 1093 | Bilbe Operating Company | Sapulpa, OK 74066 | Oil & Gas Operator | Apr 2003 |
| 1094 | Bilbo Operating | Abilene, TX 79603 | Oil Operator | Mar 2004 |
| 1095 | Bileta Corporation | | Oil & Gas Operator | Aug 2010 |
| 1096 | Bill & Patsy Rich | Hobbs, NM 88240 | Oil Operator | Aug 2003 |
| 1097 | Bill And Jesse, Inc | | Oil & Gas Operator | Dec 2021 |
| 1098 | Bill Barrett Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2017 |
| 1099 | Bill Foster | | Oil Operator | Dec 2024 |
| 1100 | Bill Gallagher Enterprises LLC | Newport Beach, CA 92663 | Gas Operator | Jan 2016 |