| 7001 | Custer K. Primos | | Oil & Gas Operator | Oct 2002 |
| 7002 | Custom Service LLC | St John, KS 67576 | Oil Operator | Jul 2024 |
| 7003 | Cut Bank Gas Company | Cut Bank, MT 59427 | Gas Operator | Sep 2024 |
| 7004 | Cut Through Hydrocarbon | Florence, KY 41042 | Gas Operator | Dec 2019 |
| 7005 | Cutbow Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Nov 2024 |
| 7006 | Cutler Oil, LLC | Rantoul, KS 66079 | Oil Operator | May 2024 |
| 7007 | Cutter Exploration Inc | Oviedo, FL 32765-0476-0476 | Oil & Gas Operator | Dec 2023 |
| 7008 | Cutter Oil Company | West Salem, OH 44287 | Oil & Gas Operator | Dec 2018 |
| 7009 | Cutter Oil LLC | West Salem, OH 44287 | Oil & Gas Operator | Dec 2023 |
| 7010 | Cuyahoga Expl & Develop | Marietta, OH 45750 | Oil & Gas Operator | Dec 1986 |
| 7011 | Cuyahoga Expl. & Devel. Corp. | Jericho, NY 11753 | Oil & Gas Operator | Dec 1996 |
| 7012 | CVR Supply & Trading LLC | Sugar Land, TX 77479 | Oil & Gas Operator | Apr 2024 |
| 7013 | CVS Operating, LLC. | Plano, TX 75074 | Oil & Gas Operator | Nov 2024 |
| 7014 | CVS Production, LLC. | Plano, TX 75074 | Oil Operator | Nov 2024 |
| 7015 | CW Dalcan Management SVCS, LTD. | Frisco, TX 75033 | Oil Operator | Nov 2024 |
| 7016 | CW Investments | Okmulgee, OK 74447-4026 | Oil & Gas Operator | Aug 2024 |
| 7017 | CWB Energy Inc | Oklahoma City, OK 73139-8837 | Oil Operator | May 2000 |
| 7018 | CWB Oil Company, LLC | St. Francis, KS 67756 | Oil Operator | Jul 2024 |
| 7019 | CWC Oil & Gas, LLC | Abilene, TX 79608 | Oil & Gas Operator | Nov 2024 |
| 7020 | CWC Petro LLC | | Gas Operator | Aug 2023 |
| 7021 | CWD Resources, LLC | Kilgore, TX 75663 | Oil Operator | Nov 2024 |
| 7022 | CWF Associates, LTD. | | Oil & Gas Operator | Apr 1988 |
| 7023 | CWF Energy, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Jul 1997 |
| 7024 | Cwic, Inc. | Granbury, TX 76049 | Oil & Gas Operator | Nov 2024 |
| 7025 | CWJ Operating Co., Inc. | | Oil & Gas Operator | Sep 2001 |
| 7026 | Cwo Energy, LLC | Midland, TX 79705 | Oil Operator | Nov 2024 |
| 7027 | Cwoc | Big Spring, TX 79721 | Oil & Gas Operator | Nov 2024 |
| 7028 | CWS Aceite Operating, Inc. | Cotulla, TX 78014 | Oil & Gas Operator | Aug 2018 |
| 7029 | CWT Operating, LLC | McKinney, TX 75072 | Oil & Gas Operator | Sep 2024 |
| 7030 | CX Disposals LLC | Minco, OK 73059-9472 | Oil Operator | Aug 2024 |
| 7031 | CX Operating LLC | Dallas, TX 75238 | Oil & Gas Operator | Nov 2024 |
| 7032 | CX Operating, Inc. | | Oil & Gas Operator | Oct 2023 |
| 7033 | CXL Energy LLC | Canada, 00100 | Oil & Gas Operator | Nov 2024 |
| 7034 | Cxy Energy, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Nov 2000 |
| 7035 | Cyanostar Energy, Inc | Tulsa, OK 74103-4122 | Oil & Gas Operator | Sep 2001 |
| 7036 | Cyber Enviro-Tech Inc | | Oil Operator | Nov 2024 |
| 7037 | Cycle Oil & Gas Inc. | Graham, TX 76450 | Oil Operator | Nov 2024 |
| 7038 | Cycle Oil & Gas LTD | | Gas Operator | Jan 2023 |
| 7039 | Cyclone Exploration, Inc. | Florence, CO 81226 | Oil & Gas Operator | Nov 2024 |
| 7040 | Cyclone Petroleu | | Oil & Gas Operator | Nov 1995 |
| 7041 | Cyclone Petroleum, Incorporated | Jenks, OK 74037 | Oil & Gas Operator | Jul 2024 |
| 7042 | Cyclops Corp | Pittsburgh, PA 15228 | Oil & Gas Operator | Dec 1992 |
| 7043 | Cygnus Producing Corporation | | Oil & Gas Operator | Feb 1990 |
| 7044 | Cymri Corporation, The | Houston, TX 77057 | Oil & Gas Operator | Mar 2008 |
| 7045 | Cymri, L.L.C. | Houston, TX 77042 | Oil & Gas Operator | Nov 2024 |
| 7046 | Cynpat Oil & Gas, Inc. | Sulphur SPGS, TX 75482 | Oil Operator | Nov 2018 |
| 7047 | Cypress Creek Production Company | Magnolia, AR 71753 | Oil Operator | Jun 2024 |
| 7048 | Cypress E & P Corporation | Leander, TX 78646 | Oil & Gas Operator | Sep 2016 |
| 7049 | Cypress Exploration Company | Tulsa, OK 74132 | Oil & Gas Operator | Aug 2024 |
| 7050 | Cypress Gas Pipeline Company | | Oil Operator | Dec 1998 |
| 7051 | Cypress Gas Pipeline, LLC | | Oil Operator | Sep 2019 |
| 7052 | Cypress Oil Company, Inc. | | Oil & Gas Operator | Aug 2003 |
| 7053 | Cypress Operating, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2024 |
| 7054 | Cypress Partners, Inc. | Houston, TX 77068 | Oil & Gas Operator | May 1999 |
| 7055 | Cypress Production, Inc. | Azle, TX 76020 | Oil & Gas Operator | Nov 2024 |
| 7056 | Cypress Resources | | Oil & Gas Operator | Jul 2004 |
| 7057 | Cyrus, Scott | Louisa, KY 41230 | Oil Operator | Dec 2022 |
| 7058 | Cyrus, Wade T | Fort Gay, WV 25574 | Oil & Gas Operator | Dec 2013 |
| 7059 | Czar Resources Inc | Houston, TX 77060 | Oil & Gas Operator | Oct 1992 |
| 7060 | Czarniak, Dennis G. | Holland, NY 14080 | Gas Operator | Dec 2023 |
| 7061 | Czerniak, Michael A. And Cheryl A. | Lakewood, NY 14750 | Gas Operator | Dec 2023 |
| 7062 | Czesak Dairy Farm, LLC | Chaffee, NY 14030 | Gas Operator | Dec 2023 |
| 7063 | Czworka, Terry D. | Le Roy, NY 14482 | Gas Operator | Dec 2023 |
| 7064 | D & A Oil Company | Abilene, TX 79606 | Oil & Gas Operator | Oct 2018 |
| 7065 | D & A Oil Company, A General Partnership | Clearwater, KS 67026 | Oil Operator | Aug 2023 |
| 7066 | D & B Energy Corporation | San Antonio, TX 78264 | Oil Operator | Nov 2024 |
| 7067 | D & B Gas Co. | Burden, KS 67019 | Gas Operator | Feb 2001 |
| 7068 | D & B Gas Prod LLC | Kittanning, PA 16201-7123 | Oil & Gas Operator | Dec 2023 |
| 7069 | D & B Johnson Family LLC | Owasso, OK 74055-7578 | Oil Operator | Jul 2024 |
| 7070 | D & B Oil Company | Graham, TX 76450 | Oil & Gas Operator | Nov 2024 |
| 7071 | D & B Operating LLC | Ringwood, OK 73768 | Oil Operator | Jan 2023 |
| 7072 | D & B Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2003 |
| 7073 | D & C Operating, Inc. | | Oil & Gas Operator | Apr 1999 |
| 7074 | D & D Contract Pumping Inc | Casper, WY 82604 | Oil Operator | Oct 2024 |
| 7075 | D & D Drilling | Kingston, OK 73439-9549 | Oil & Gas Operator | May 2000 |
| 7076 | D & D DRLG Co & Saye Oil Co | | Oil Operator | Apr 1982 |
| 7077 | D & D Energy | | Oil Operator | Jul 2023 |
| 7078 | D & D Energy Company | North Canton, OH 44721 | Oil & Gas Operator | Dec 2020 |
| 7079 | D & D Energy Inc | Sapulpa, OK 74066-8734 | Oil & Gas Operator | May 2013 |
| 7080 | D & D Enterprises | Post, TX 79356 | Oil & Gas Operator | Nov 2024 |
| 7081 | D & D Expl Co-Mba Energy | | Oil Operator | Nov 1985 |
| 7082 | D & D Exploration Co. | | Oil & Gas Operator | Nov 1986 |
| 7083 | D & D Exploration Co. Et Al | | Oil Operator | Feb 1988 |
| 7084 | D & D Oil & Gas, LLC | Woodsfield, OH 43793 | Oil & Gas Operator | Dec 2023 |
| 7085 | D & D Oil Co. #2 | Post, TX 79356 | Oil & Gas Operator | Nov 2024 |
| 7086 | D & D Oil Company | Dayton, TX 77535 | Oil & Gas Operator | Nov 2024 |
| 7087 | D & D Pipe & Equipment Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Mar 2005 |
| 7088 | D & D Services | Cement, OK 73017-9712 | Oil Operator | Feb 2017 |
| 7089 | D & D Well Service, L.L.C. | Post, TX 79356 | Oil Operator | Nov 2024 |
| 7090 | D & E Oil Co. | Perryton, TX 79070 | Oil & Gas Operator | Nov 2024 |
| 7091 | D & F Oil Company | Dewey, OK 74029 | Oil & Gas Operator | Apr 2001 |
| 7092 | D & F Petroleum | | Oil & Gas Operator | Sep 1990 |
| 7093 | D & G Company | Iraan, TX 79744 | Oil Operator | Apr 2006 |
| 7094 | D & G Energy Corporation | Houston, TX 77056 | Oil & Gas Operator | Dec 1995 |
| 7095 | D & G Gas | Shock, WV 26638 | Oil & Gas Operator | Dec 2021 |
| 7096 | D & G Natural Resources Inc | Somerset, KY 42502 | Oil & Gas Operator | Dec 2022 |
| 7097 | D & G Oil & Gas Company Inc | Enid, OK 73702-2027 | Oil & Gas Operator | Nov 2021 |
| 7098 | D & G Oil Compan | | Oil Operator | Mar 1988 |
| 7099 | D & G Operating Company, Inc. | Houston, TX 77056 | Oil & Gas Operator | Nov 2024 |
| 7100 | D & G Roustabout Service | | Oil & Gas Operator | Jan 2024 |