| 7001 | CSD IV Oil LLC | Columbus, OH 43209 | Oil Operator | Dec 2024 |
| 7002 | CSL Exploration, LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2018 |
| 7003 | CSM, Inc. | | Gas Operator | Oct 1990 |
| 7004 | Cso Consulting | Bridgeport, TX 76426 | Oil & Gas Operator | Mar 2020 |
| 7005 | Csoda Operating Company LLC | Amarillo, TX 79114-7506 | Oil & Gas Operator | Aug 2021 |
| 7006 | CSV Holdings, Inc. | | Oil & Gas Operator | Dec 2014 |
| 7007 | CSX Oil & Gas Corporation | Houston, TX 77210-4326 | Oil & Gas Operator | Mar 1993 |
| 7008 | CT Adams Jr., LLC | Schulenburg, TX 78956 | Oil Operator | Jul 2025 |
| 7009 | CTC Oil Co., Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2025 |
| 7010 | Cti Associates | | Gas Operator | Jan 1990 |
| 7011 | CTL Oil & Gas Corporation | Buchanan Dam, TX 78609 | Oil & Gas Operator | Nov 2020 |
| 7012 | CTL Production, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Jul 2025 |
| 7013 | CTR 247 LLC | Peru, KS 67360 | Oil Operator | Mar 2025 |
| 7014 | CTR Petroleum, Inc. | Corpus Chrsti, TX 78414 | Oil & Gas Operator | Mar 2015 |
| 7015 | CTS Oil Recovery, LLC | Austin, TX 78747 | Oil Operator | May 2024 |
| 7016 | CTX Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Aug 2003 |
| 7017 | Cuatro Oil And Gas Corporation | Abilene, TX 79603 | Oil & Gas Operator | Jul 2025 |
| 7018 | Cuatro Petro Corp. | Richardson, TX 75080 | Oil & Gas Operator | Jul 2025 |
| 7019 | Cub Creek Energy LLC | | Oil & Gas Operator | Oct 2023 |
| 7020 | Cuba, John H. | Olney, TX 76374 | Oil Operator | Jul 2025 |
| 7021 | Cucharas Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Dec 2000 |
| 7022 | Cudd Operating Corp. | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 2020 |
| 7023 | Cuervo Resources, Inc. | FT Stockton, TX 79735 | Oil & Gas Operator | Oct 1996 |
| 7024 | Cuervo, Inc. | FT Stockton, TX 79735 | Oil & Gas Operator | Jul 2025 |
| 7025 | Cuesta Petroleum Inc | Shawnee, OK 74801-6963 | Oil & Gas Operator | Apr 2025 |
| 7026 | Culbreath Oil & Gas Company, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Apr 2025 |
| 7027 | Culebra Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Dec 2000 |
| 7028 | Culebra Oil & Gas LLC | Kerrville, TX 78028 | Oil & Gas Operator | Jul 2025 |
| 7029 | Cullen Corporati | | Oil & Gas Operator | Jan 1993 |
| 7030 | Cullison, Jimmie I. | Moscow, KS 67952 | Oil Operator | Apr 2002 |
| 7031 | Culoco, Inc. | Dallas, TX 75374 | Oil & Gas Operator | Nov 2024 |
| 7032 | Culp & Copple Oil Company | Cushing, OK 74023 | Oil & Gas Operator | Feb 2025 |
| 7033 | Culver & Cain Production LLC | Tyler, TX 75711 | Oil & Gas Operator | Jul 2025 |
| 7034 | Culver & Grounds | | Oil & Gas Operator | Nov 1995 |
| 7035 | Culver & Grounds Oil Properties, Inc. | McPherson, KS 67460 | Oil Operator | Mar 2025 |
| 7036 | Cumberland Exploration | Cleveland, OH 44111 | Oil & Gas Operator | Dec 1985 |
| 7037 | Cumberland Gas Co.(Tree Preservation Co) | | Oil & Gas Operator | Dec 1996 |
| 7038 | Cumberland Harlan Expl Corp | Barbourville, KY 40906 | Oil & Gas Operator | Dec 2023 |
| 7039 | Cumberland Operating Company | Seminole, OK 74868-1258 | Oil & Gas Operator | Mar 2007 |
| 7040 | Cumberland Operating LLC | Cody, WY 82414 | Oil & Gas Operator | May 2025 |
| 7041 | Cumberland Petroleum, Inc. II | Weatherford, TX 76086 | Oil & Gas Operator | May 1997 |
| 7042 | Cumberland River Oil & Gas, Inc | Williamsburg, KY 40769 | Oil & Gas Operator | Dec 2023 |
| 7043 | Cumberland Valley Resources, LLC | Louisville, KY 40204 | Oil & Gas Operator | Dec 2023 |
| 7044 | Cumming Company, Inc. The | Fort Worth, TX 76116 | Oil & Gas Operator | Jul 2025 |
| 7045 | Cummings Gene | | Oil Operator | Dec 2000 |
| 7046 | Cummings Oil & Cattle | Ada, OK 74820-0994 | Oil Operator | Jan 2017 |
| 7047 | Cummings Oil Company | Oklahoma City, OK 73112-6113 | Oil & Gas Operator | May 2025 |
| 7048 | Cummings, C. M. Oil & Gas | Lewisville, TX 75029 | Oil & Gas Operator | Nov 1993 |
| 7049 | Cummins & Walker Oil Co., Inc. | Austin, TX 78746 | Oil & Gas Operator | Jan 2021 |
| 7050 | Cummins Wren Oil Company | Tulsa, OK 74135 | Oil & Gas Operator | Nov 1998 |
| 7051 | Cundiff Harold | Perkins, OK 74059-4199 | Oil & Gas Operator | Apr 2025 |
| 7052 | Cundiff Jack | Perkins, OK 74059-4198 | Oil & Gas Operator | Apr 2014 |
| 7053 | Cundiff Operating Company | Dallas, TX 75238 | Oil & Gas Operator | Jul 2025 |
| 7054 | Cunningham Crude, A General Partnership | Independence, KS 67301 | Oil Operator | Mar 2025 |
| 7055 | Cunningham Energy LLC | Charleston, WV 25302 | Oil & Gas Operator | Dec 2021 |
| 7056 | Cunningham, Melvin | Medicine Lodge, KS 67104 | Oil Operator | Jan 2013 |
| 7057 | Cur-Ric Petrol & Gas Corp | Las Vegas, NV 89120-4003 | Oil Operator | Dec 1985 |
| 7058 | Curmar Producers | Adairsville, GA 30103 | Oil Operator | Mar 2008 |
| 7059 | Curn Lisa | Steubenville, OH 43952-2535 | Oil Operator | Apr 2025 |
| 7060 | Curran Oil Co | Great Falls, MT 59401 | Gas Operator | May 2001 |
| 7061 | Currie Cattle Co. | Big Spring, TX 79720 | Oil & Gas Operator | Sep 2007 |
| 7062 | Currie, V. Monta, Jr. | | Gas Operator | Nov 1990 |
| 7063 | Curry Oil | | Oil Operator | May 2005 |
| 7064 | Curry R D Production Co | Memphis, TN 38103 | Oil & Gas Operator | Dec 1986 |
| 7065 | Curry, Gregg | Madison, KS 66860 | Oil Operator | Mar 2025 |
| 7066 | Curt Weaver Et Al | | Oil Operator | Apr 1982 |
| 7067 | Curt'S Oil Opera | | Oil Operator | Nov 1994 |
| 7068 | Curt'S Oil Operation, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Mar 2025 |
| 7069 | Curtis & Son Oil Inc | Sugar Grove, PA 16350 | Oil & Gas Operator | Dec 2024 |
| 7070 | Curtis Beard & Huston P. Ganey | | Oil Operator | Mar 1987 |
| 7071 | Curtis F. Adams | | Oil & Gas Operator | Oct 2024 |
| 7072 | Curtis Hankamer | Houston, TX 77024 | Oil & Gas Operator | Jun 1997 |
| 7073 | Curtis J Little | Farmington, NM 87499 | Oil & Gas Operator | Aug 2005 |
| 7074 | Curtis Oil Inc | Duke Center, PA 16729-0287 | Oil & Gas Operator | Dec 2024 |
| 7075 | Curton Capital Corp | | Oil Operator | Sep 2015 |
| 7076 | Curzac Oil And Gas, LLC | Plano, TX 75075 | Oil & Gas Operator | Jul 2025 |
| 7077 | Curzon Operating Company LTD | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Apr 2025 |
| 7078 | Custer & Wright Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 7079 | Custer K. Primos | | Oil & Gas Operator | Oct 2002 |
| 7080 | Custom Oil Explo | | Oil & Gas Operator | May 1992 |
| 7081 | Custom Service LLC | St John, KS 67576 | Oil Operator | Feb 2025 |
| 7082 | Cut Bank Gas Company | Cut Bank, MT 59427 | Gas Operator | May 2025 |
| 7083 | Cut Through Hydrocarbon | Florence, KY 41042 | Gas Operator | Dec 2019 |
| 7084 | Cutbow Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Jul 2025 |
| 7085 | Cutler Oil, LLC | Rantoul, KS 66079 | Oil Operator | Nov 2024 |
| 7086 | Cutter Exploration Inc | Oviedo, FL 32765 | Oil & Gas Operator | Dec 2024 |
| 7087 | Cutter Oil Company | West Salem, OH 44287 | Oil & Gas Operator | Dec 2018 |
| 7088 | Cutter Oil LLC | West Salem, OH 44287 | Oil & Gas Operator | Dec 2024 |
| 7089 | Cuyahoga Expl & Develop | Marietta, OH 45750 | Oil & Gas Operator | Dec 1986 |
| 7090 | Cuyahoga Expl. & Devel. Corp. | Jericho, NY 11753 | Oil & Gas Operator | Dec 1996 |
| 7091 | CVR Supply & Trading, LLC | Sugar Land, TX 77479 | Oil & Gas Operator | Apr 2024 |
| 7092 | CVS Operating, LLC. | Plano, TX 75074 | Oil & Gas Operator | Jul 2025 |
| 7093 | CVS Production, LLC. | Plano, TX 75074 | Oil Operator | Jul 2025 |
| 7094 | CW Dalcan Management SVCS, LTD. | Frisco, TX 75033 | Oil Operator | Jul 2025 |
| 7095 | CW Investments | Okmulgee, OK 74447-4026 | Oil & Gas Operator | Apr 2025 |
| 7096 | CWB Energy Inc | Oklahoma City, OK 73139-8837 | Oil Operator | May 2000 |
| 7097 | CWB Oil Company, LLC | St. Francis, KS 67756 | Oil Operator | Mar 2025 |
| 7098 | CWC Oil & Gas, LLC | Abilene, TX 79608 | Oil & Gas Operator | Jul 2025 |
| 7099 | CWC Petro LLC | | Gas Operator | Dec 2024 |
| 7100 | CWD Resources, LLC | Kilgore, TX 75663 | Oil Operator | Jul 2025 |