| 7201 | Curtis Beard & Huston P. Ganey | | Oil Operator | Mar 1987 |
| 7202 | Curtis F. Adams | | Oil & Gas Operator | Oct 2024 |
| 7203 | Curtis Hankamer | Houston, TX 77024 | Oil & Gas Operator | Jun 1997 |
| 7204 | Curtis J Little | Farmington, NM 87499 | Oil & Gas Operator | Aug 2005 |
| 7205 | Curtis Oil Inc | Duke Center, PA 16729-0287 | Oil & Gas Operator | Dec 2024 |
| 7206 | Curton Capital Corp | | Oil Operator | Sep 2015 |
| 7207 | Curzac Oil And Gas, LLC | Plano, TX 75075 | Oil & Gas Operator | Apr 2025 |
| 7208 | Curzon Operating Company LTD | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Jan 2025 |
| 7209 | Custer & Wright Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 7210 | Custer K. Primos | | Oil & Gas Operator | Oct 2002 |
| 7211 | Custom Oil Explo | | Oil & Gas Operator | May 1992 |
| 7212 | Custom Service LLC | St John, KS 67576 | Oil Operator | Nov 2024 |
| 7213 | Cut Bank Gas Company | Cut Bank, MT 59427 | Gas Operator | Mar 2025 |
| 7214 | Cut Through Hydrocarbon | Florence, KY 41042 | Gas Operator | Dec 2019 |
| 7215 | Cutbow Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 7216 | Cutler Oil, LLC | Rantoul, KS 66079 | Oil Operator | Nov 2024 |
| 7217 | Cutter Exploration Inc | Oviedo, FL 32765-0476-0476 | Oil & Gas Operator | Dec 2024 |
| 7218 | Cutter Oil Company | West Salem, OH 44287 | Oil & Gas Operator | Dec 2018 |
| 7219 | Cutter Oil LLC | West Salem, OH 44287 | Oil & Gas Operator | Dec 2024 |
| 7220 | Cuyahoga Expl & Develop | Marietta, OH 45750 | Oil & Gas Operator | Dec 1986 |
| 7221 | Cuyahoga Expl. & Devel. Corp. | Jericho, NY 11753 | Oil & Gas Operator | Dec 1996 |
| 7222 | CVR Supply & Trading LLC | Sugar Land, TX 77479 | Oil & Gas Operator | Apr 2024 |
| 7223 | CVS Operating, LLC. | Plano, TX 75074 | Oil & Gas Operator | Apr 2025 |
| 7224 | CVS Production, LLC. | Plano, TX 75074 | Oil Operator | Apr 2025 |
| 7225 | CW Dalcan Management SVCS, LTD. | Frisco, TX 75033 | Oil Operator | Apr 2025 |
| 7226 | CW Investments | Okmulgee, OK 74447-4026 | Oil & Gas Operator | Jan 2025 |
| 7227 | CWB Energy Inc | Oklahoma City, OK 73139-8837 | Oil Operator | May 2000 |
| 7228 | CWB Oil Company, LLC | St. Francis, KS 67756 | Oil Operator | Dec 2024 |
| 7229 | CWC Oil & Gas, LLC | Abilene, TX 79608 | Oil & Gas Operator | Apr 2025 |
| 7230 | CWC Petro LLC | | Gas Operator | Dec 2024 |
| 7231 | CWD Resources, LLC | Kilgore, TX 75663 | Oil Operator | Apr 2025 |
| 7232 | CWF Associates, LTD. | | Oil & Gas Operator | Apr 1988 |
| 7233 | CWF Energy, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Jul 1997 |
| 7234 | Cwic, Inc. | Granbury, TX 76049 | Oil & Gas Operator | Apr 2025 |
| 7235 | CWJ Operating Co., Inc. | | Oil & Gas Operator | Sep 2001 |
| 7236 | Cwo Energy, LLC | Midland, TX 79705 | Oil Operator | Apr 2025 |
| 7237 | Cwoc | Big Spring, TX 79721 | Oil & Gas Operator | Apr 2025 |
| 7238 | CWS Aceite Operating, Inc. | Cotulla, TX 78014 | Oil & Gas Operator | Aug 2018 |
| 7239 | CWT Operating, LLC | McKinney, TX 75072 | Oil & Gas Operator | Feb 2025 |
| 7240 | CX Disposals LLC | Minco, OK 73059-9472 | Oil Operator | Jan 2025 |
| 7241 | CX Operating LLC | Dallas, TX 75238 | Oil & Gas Operator | Apr 2025 |
| 7242 | CX Operating, Inc. | | Oil & Gas Operator | Oct 2023 |
| 7243 | CXL Energy LLC | Canada, 00100 | Oil & Gas Operator | Apr 2025 |
| 7244 | Cxy Energy, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Nov 2000 |
| 7245 | Cyanostar Energy, Inc | Tulsa, OK 74103-4122 | Oil & Gas Operator | Sep 2001 |
| 7246 | Cyber Enviro-Tech Inc | | Oil Operator | Apr 2025 |
| 7247 | Cycle Oil & Gas Inc. | Katy, TX 77449 | Oil Operator | Apr 2025 |
| 7248 | Cycle Oil & Gas LTD | | Gas Operator | Dec 2024 |
| 7249 | Cyclone Exploration, Inc. | Florence, CO 81226 | Oil & Gas Operator | Apr 2025 |
| 7250 | Cyclone Petroleu | | Oil & Gas Operator | Nov 1995 |
| 7251 | Cyclone Petroleum, Incorporated | Jenks, OK 74037 | Oil & Gas Operator | Dec 2024 |
| 7252 | Cyclops Corp | Pittsburgh, PA 15228 | Oil & Gas Operator | Dec 1992 |
| 7253 | Cygnus Producing Corporation | | Oil & Gas Operator | Feb 1990 |
| 7254 | Cymri Corporation, The | Houston, TX 77057 | Oil & Gas Operator | Mar 2008 |
| 7255 | Cymri, L.L.C. | Houston, TX 77042 | Oil & Gas Operator | Apr 2025 |
| 7256 | Cynpat Oil & Gas, Inc. | Sulphur SPGS, TX 75482 | Oil Operator | Nov 2018 |
| 7257 | Cypress Creek Production Company | Magnolia, AR 71753 | Oil Operator | Jan 2025 |
| 7258 | Cypress E & P Corporation | Leander, TX 78646 | Oil & Gas Operator | Sep 2016 |
| 7259 | Cypress Exploration Company | Tulsa, OK 74132 | Oil & Gas Operator | Jan 2025 |
| 7260 | Cypress Gas Pipeline Company | | Oil Operator | Dec 1998 |
| 7261 | Cypress Gas Pipeline, LLC | | Oil Operator | Sep 2019 |
| 7262 | Cypress Oil Company, Inc. | | Oil & Gas Operator | Aug 2003 |
| 7263 | Cypress Operating, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2025 |
| 7264 | Cypress Partners, Inc. | Houston, TX 77068 | Oil & Gas Operator | May 1999 |
| 7265 | Cypress Production, Inc. | Azle, TX 76020 | Oil & Gas Operator | Apr 2025 |
| 7266 | Cypress Resources | | Oil & Gas Operator | Jul 2004 |
| 7267 | Cyrus, Scott | Louisa, KY 41230 | Oil Operator | Dec 2023 |
| 7268 | Cyrus, Wade T | Fort Gay, WV 25574 | Oil & Gas Operator | Dec 2013 |
| 7269 | Czar Resources Inc | Houston, TX 77060 | Oil & Gas Operator | Oct 1992 |
| 7270 | Czarniak, Dennis G. | Holland, NY 14080 | Gas Operator | Dec 2023 |
| 7271 | Czerniak, Michael A. And Cheryl A. | Lakewood, NY 14750 | Gas Operator | Dec 2023 |
| 7272 | Czesak Dairy Farm, LLC | Chaffee, NY 14030 | Gas Operator | Dec 2023 |
| 7273 | Czworka, Terry D. | Le Roy, NY 14482 | Gas Operator | Dec 2023 |
| 7274 | D & A Oil Company | Abilene, TX 79606 | Oil & Gas Operator | Oct 2018 |
| 7275 | D & A Oil Company, A General Partnership | Clearwater, KS 67026 | Oil Operator | Dec 2024 |
| 7276 | D & B Energy Corporation | San Antonio, TX 78264 | Oil Operator | Apr 2025 |
| 7277 | D & B Farm LLC | Wayne, NJ 07470 | Gas Operator | Dec 2023 |
| 7278 | D & B Gas Co. | Burden, KS 67019 | Gas Operator | Feb 2001 |
| 7279 | D & B Gas Prod LLC | Kittanning, PA 16201-7123 | Oil & Gas Operator | Dec 2024 |
| 7280 | D & B Johnson Family LLC | Owasso, OK 74055-7578 | Oil Operator | Dec 2024 |
| 7281 | D & B Oil Company | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 7282 | D & B Operating LLC | Ringwood, OK 73768 | Oil Operator | Jan 2023 |
| 7283 | D & B Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2003 |
| 7284 | D & C Operating, Inc. | | Oil & Gas Operator | Apr 1999 |
| 7285 | D & D Drilling | Kingston, OK 73439-9549 | Oil & Gas Operator | May 2000 |
| 7286 | D & D DRLG Co & Saye Oil Co | | Oil Operator | Apr 1982 |
| 7287 | D & D Energy | | Oil Operator | Jul 2023 |
| 7288 | D & D Energy Company | North Canton, OH 44721 | Oil & Gas Operator | Dec 2020 |
| 7289 | D & D Energy Inc | Sapulpa, OK 74066-8734 | Oil & Gas Operator | May 2013 |
| 7290 | D & D Enterprises | Post, TX 79356 | Oil & Gas Operator | Apr 2025 |
| 7291 | D & D Expl Co-Mba Energy | | Oil Operator | Nov 1985 |
| 7292 | D & D Exploration Co. | | Oil & Gas Operator | Nov 1986 |
| 7293 | D & D Exploration Co. Et Al | | Oil Operator | Feb 1988 |
| 7294 | D & D Oil & Gas, LLC | Woodsfield, OH 43793 | Oil & Gas Operator | Dec 2024 |
| 7295 | D & D Oil Co. #2 | Post, TX 79356 | Oil & Gas Operator | Apr 2025 |
| 7296 | D & D Oil Company | Dayton, TX 77535 | Oil & Gas Operator | Apr 2025 |
| 7297 | D & D Pipe & Equipment Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Mar 2005 |
| 7298 | D & D Services | Cement, OK 73017-9712 | Oil Operator | Feb 2017 |
| 7299 | D & D Well Service, L.L.C. | Post, TX 79356 | Oil Operator | Apr 2025 |
| 7300 | D & E Oil Co. | Perryton, TX 79070 | Oil & Gas Operator | Apr 2025 |