| 6901 | Cub Creek Energy LLC | | Oil & Gas Operator | Mar 2019 |
| 6902 | Cuba, John H. | Olney, TX 76374 | Oil Operator | May 2026 |
| 6903 | Cucharas Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Dec 2000 |
| 6904 | Cudd Operating Corp | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 2020 |
| 6905 | Cuervo Resources, Inc. | FT Stockton, TX 79735 | Oil & Gas Operator | Oct 1996 |
| 6906 | Cuervo, Inc. | FT Stockton, TX 79735 | Oil & Gas Operator | May 2026 |
| 6907 | Cuesta Petroleum Inc | Shawnee, OK 74801-6963 | Oil & Gas Operator | Jan 2026 |
| 6908 | Culbreath Oil & Gas Co Inc | Tulsa, OK 74135 | Oil & Gas Operator | Jan 2026 |
| 6909 | Culebra Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Dec 2000 |
| 6910 | Culebra Oil & Gas, LLC | Kerrville, TX 78028 | Oil & Gas Operator | May 2026 |
| 6911 | Cullen Corporati | | Oil & Gas Operator | Jan 1993 |
| 6912 | Cullison, Jimmie I. | Moscow, KS 67952 | Oil Operator | Apr 2002 |
| 6913 | Culoco, Inc. | Dallas, TX 75374 | Oil & Gas Operator | Nov 2024 |
| 6914 | Culp & Copple Oil Company | Cushing, OK 74023 | Oil & Gas Operator | Feb 2026 |
| 6915 | Culver & Cain Production LLC | Tyler, TX 75711 | Oil & Gas Operator | May 2026 |
| 6916 | Culver & Grounds | | Oil & Gas Operator | Nov 1995 |
| 6917 | Culver & Grounds Oil Properties, Inc. | McPherson, KS 67460 | Oil Operator | Dec 2025 |
| 6918 | Cumberland Gas Co.(Tree Preservation Co) | | Oil & Gas Operator | Dec 1996 |
| 6919 | Cumberland Harlan Expl Corp | Barbourville, KY 40906 | Oil & Gas Operator | Dec 2024 |
| 6920 | Cumberland Operating Company | Seminole, OK 74868-1258 | Oil & Gas Operator | Mar 2007 |
| 6921 | Cumberland Operating LLC | Cody, WY 82414 | Oil & Gas Operator | Jan 2026 |
| 6922 | Cumberland Petroleum, Inc. II | Weatherford, TX 76086 | Oil & Gas Operator | May 1997 |
| 6923 | Cumberland River Oil & Gas, Inc | Williamsburg, KY 40769 | Oil & Gas Operator | Dec 2024 |
| 6924 | Cumberland Valley Resources, LLC | Louisville, KY 40204 | Oil & Gas Operator | Dec 2024 |
| 6925 | Cumming Company, Inc. The | Fort Worth, TX 76116 | Oil & Gas Operator | May 2026 |
| 6926 | Cummings Gene | | Oil Operator | Dec 2000 |
| 6927 | Cummings Oil & Cattle | Ada, OK 74820-0994 | Oil Operator | Jan 2017 |
| 6928 | Cummings Oil Company | Oklahoma City, OK 73112-6113 | Oil & Gas Operator | Feb 2026 |
| 6929 | Cummings, C. M. Oil & Gas | Lewisville, TX 75029 | Oil & Gas Operator | Nov 1993 |
| 6930 | Cummins & Walker Oil Co., Inc. | Austin, TX 78746 | Oil & Gas Operator | Jan 2021 |
| 6931 | Cummins Wren Oil Company | Tulsa, OK 74135 | Oil & Gas Operator | Nov 1998 |
| 6932 | Cundiff Harold | Perkins, OK 74059-4199 | Oil & Gas Operator | Dec 2025 |
| 6933 | Cundiff Jack | Perkins, OK 74059-4198 | Oil & Gas Operator | Apr 2014 |
| 6934 | Cundiff Operating Company | Dallas, TX 75238 | Oil & Gas Operator | May 2026 |
| 6935 | Cunningham Crude, A General Partnership | Independence, KS 67301 | Oil Operator | Dec 2025 |
| 6936 | Cunningham Energy LLC | Charleston, WV 25302 | Oil & Gas Operator | Dec 2021 |
| 6937 | Cunningham, Melvin | Medicine Lodge, KS 67104 | Oil Operator | Jan 2013 |
| 6938 | Cur-Ric Petrol & Gas Corp | Las Vegas, NV 89120-4003 | Oil Operator | Dec 1985 |
| 6939 | Curmar Producers | Adairsville, GA 30103 | Oil Operator | Mar 2008 |
| 6940 | Curn Lisa | Steubenville, OH 43952-2535 | Oil Operator | Dec 2025 |
| 6941 | Curran Oil Co | Great Falls, MT 59401 | Gas Operator | May 2001 |
| 6942 | Currie Cattle Co. | Big Spring, TX 79720 | Oil & Gas Operator | Sep 2007 |
| 6943 | Currie, V. Monta, Jr. | | Gas Operator | Nov 1990 |
| 6944 | Curry Oil | | Oil Operator | May 2005 |
| 6945 | Curry R D Production Co | Memphis, TN 38103 | Oil & Gas Operator | Dec 1986 |
| 6946 | Curry, Gregg | Madison, KS 66860 | Oil Operator | Dec 2025 |
| 6947 | Curt Weaver Et Al | | Oil Operator | Apr 1982 |
| 6948 | Curt'S Oil Opera | | Oil Operator | Nov 1994 |
| 6949 | Curt'S Oil Operation, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Dec 2025 |
| 6950 | Curtis & Son Oil Inc | Sugar Grove, PA 16350 | Oil & Gas Operator | Dec 2025 |
| 6951 | Curtis Beard & Huston P. Ganey | | Oil Operator | Mar 1987 |
| 6952 | Curtis F. Adams | | Oil & Gas Operator | Oct 2024 |
| 6953 | Curtis Hankamer | Houston, TX 77024 | Oil & Gas Operator | Jun 1997 |
| 6954 | Curtis J Little | Farmington, NM 87499 | Oil & Gas Operator | Aug 2005 |
| 6955 | Curtis Oil Inc | Duke Center, PA 16729-0287 | Oil & Gas Operator | Dec 2025 |
| 6956 | Curzac Oil And Gas, LLC | Texarkana, TX 75503 | Oil & Gas Operator | May 2026 |
| 6957 | Curzon Operating Company LTD | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Jan 2026 |
| 6958 | Custer & Wright Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2026 |
| 6959 | Custer K. Primos | | Oil & Gas Operator | Oct 2002 |
| 6960 | Cut Through Hydrocarbon | Florence, KY 41042 | Gas Operator | Dec 2024 |
| 6961 | Cutbow Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | May 2026 |
| 6962 | Cutler Oil, LLC | Rantoul, KS 66079 | Oil Operator | Dec 2025 |
| 6963 | Cutter Exploration Inc | Oviedo, FL 32765 | Oil & Gas Operator | Dec 2024 |
| 6964 | Cutter Oil Company | West Salem, OH 44287 | Oil & Gas Operator | Dec 2018 |
| 6965 | Cutter Oil LLC | West Salem, OH 44287 | Oil & Gas Operator | Dec 2025 |
| 6966 | Cuyahoga Expl & Develop | Marietta, OH 45750 | Oil & Gas Operator | Dec 1986 |
| 6967 | Cuyahoga Expl. & Devel. Corp. | Jericho, NY 11753 | Oil & Gas Operator | Dec 1996 |
| 6968 | CVR Supply & Trading, LLC | Sugar Land, TX 77479 | Oil & Gas Operator | Apr 2024 |
| 6969 | CVS Operating, LLC. | Plano, TX 75074 | Oil & Gas Operator | May 2026 |
| 6970 | CVS Production, LLC. | Plano, TX 75074 | Oil Operator | May 2026 |
| 6971 | CW Dalcan Management SVCS, LTD. | Frisco, TX 75033 | Oil Operator | May 2026 |
| 6972 | CW Investments | Okmulgee, OK 74447-4026 | Oil & Gas Operator | Nov 2025 |
| 6973 | CWB Energy Inc | Oklahoma City, OK 73139-8837 | Oil Operator | May 2000 |
| 6974 | CWB Oil Company, LLC | St. Francis, KS 67756 | Oil Operator | Dec 2025 |
| 6975 | CWC Oil & Gas, LLC | Abilene, TX 79608 | Oil & Gas Operator | May 2026 |
| 6976 | CWC Petro LLC | | Gas Operator | Dec 2024 |
| 6977 | CWD Resources, LLC | Kilgore, TX 75663 | Oil Operator | May 2026 |
| 6978 | CWF Associates, LTD. | | Oil & Gas Operator | Apr 1988 |
| 6979 | CWF Energy, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Jul 1997 |
| 6980 | Cwic, Inc. | Granbury, TX 76049 | Oil & Gas Operator | May 2026 |
| 6981 | CWJ Operating Co., Inc. | | Oil & Gas Operator | Sep 2001 |
| 6982 | Cwo Energy, LLC | Midland, TX 79705 | Oil Operator | May 2026 |
| 6983 | Cwoc | Big Spring, TX 79721 | Oil & Gas Operator | May 2026 |
| 6984 | CWS Aceite Operating, Inc. | Cotulla, TX 78014 | Oil & Gas Operator | Aug 2018 |
| 6985 | CX Disposals LLC | Minco, OK 73059-9472 | Oil Operator | Feb 2026 |
| 6986 | CX Operating LLC | Dallas, TX 75238 | Oil & Gas Operator | May 2026 |
| 6987 | CX Operating, Inc. | | Oil & Gas Operator | Oct 2023 |
| 6988 | CXL Energy LLC | Canada, 00100 | Oil & Gas Operator | May 2026 |
| 6989 | Cxy Energy, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Nov 2000 |
| 6990 | Cyanostar Energy Inc | Tulsa, OK 74103-4122 | Oil & Gas Operator | Feb 1999 |
| 6991 | Cyber Enviro-Tech Inc | San Tan Valley, AZ 85144 | Oil & Gas Operator | May 2026 |
| 6992 | Cycle Oil & Gas Inc. | Katy, TX 77449 | Oil Operator | May 2026 |
| 6993 | Cycle Oil & Gas LTD | | Gas Operator | Dec 2025 |
| 6994 | Cyclone Exploration, Inc. | Florence, CO 81226 | Oil & Gas Operator | May 2026 |
| 6995 | Cyclone Petroleu | | Oil & Gas Operator | Nov 1995 |
| 6996 | Cyclone Petroleum, Incorporated | Jenks, OK 74037 | Oil & Gas Operator | Nov 2025 |
| 6997 | Cyclops Corp | Pittsburgh, PA 15228 | Oil & Gas Operator | Dec 1992 |
| 6998 | Cygnus Producing Corporation | | Oil & Gas Operator | Feb 1990 |
| 6999 | Cymri Corporation, The | Houston, TX 77057 | Oil & Gas Operator | Mar 2008 |
| 7000 | Cymri, L.L.C. | Houston, TX 77042 | Oil & Gas Operator | May 2026 |