| 2801 | Curton Capital Corp | | Oil Operator | Sep 2015 |
| 2802 | Curzac Oil And Gas, LLC | Plano, TX 75075 | Oil & Gas Operator | Apr 2025 |
| 2803 | Curzon Operating Company LTD | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Jan 2025 |
| 2804 | Custer & Wright Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 2805 | Custer K. Primos | | Oil & Gas Operator | Oct 2002 |
| 2806 | Custom Oil Explo | | Oil & Gas Operator | May 1992 |
| 2807 | Custom Service LLC | St John, KS 67576 | Oil Operator | Nov 2024 |
| 2808 | Cut Bank Gas Company | Cut Bank, MT 59427 | Gas Operator | Jan 2025 |
| 2809 | Cut Through Hydrocarbon | Florence, KY 41042 | Gas Operator | Dec 2019 |
| 2810 | Cutbow Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 2811 | Cutler Oil, LLC | Rantoul, KS 66079 | Oil Operator | Nov 2024 |
| 2812 | Cutter Exploration Inc | Oviedo, FL 32765-0476-0476 | Oil & Gas Operator | Dec 2024 |
| 2813 | Cutter Oil Company | West Salem, OH 44287 | Oil & Gas Operator | Dec 2018 |
| 2814 | Cutter Oil LLC | West Salem, OH 44287 | Oil & Gas Operator | Dec 2023 |
| 2815 | Cuyahoga Expl & Develop | Marietta, OH 45750 | Oil & Gas Operator | Dec 1986 |
| 2816 | Cuyahoga Expl. & Devel. Corp. | Jericho, NY 11753 | Oil & Gas Operator | Dec 1996 |
| 2817 | CVR Supply & Trading LLC | Sugar Land, TX 77479 | Oil & Gas Operator | Apr 2024 |
| 2818 | CVS Operating, LLC. | Plano, TX 75074 | Oil & Gas Operator | Apr 2025 |
| 2819 | CVS Production, LLC. | Plano, TX 75074 | Oil Operator | Apr 2025 |
| 2820 | CW Dalcan Management SVCS, LTD. | Frisco, TX 75033 | Oil Operator | Apr 2025 |
| 2821 | CW Investments | Okmulgee, OK 74447-4026 | Oil & Gas Operator | Jan 2025 |
| 2822 | CWB Energy Inc | Oklahoma City, OK 73139-8837 | Oil Operator | May 2000 |
| 2823 | CWB Oil Company, LLC | St. Francis, KS 67756 | Oil Operator | Dec 2024 |
| 2824 | CWC Oil & Gas, LLC | Abilene, TX 79608 | Oil & Gas Operator | Apr 2025 |
| 2825 | CWC Petro LLC | | Gas Operator | Dec 2024 |
| 2826 | CWD Resources, LLC | Kilgore, TX 75663 | Oil Operator | Apr 2025 |
| 2827 | CWF Associates, LTD. | | Oil & Gas Operator | Apr 1988 |
| 2828 | CWF Energy, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Jul 1997 |
| 2829 | Cwic, Inc. | Granbury, TX 76049 | Oil & Gas Operator | Apr 2025 |
| 2830 | CWJ Operating Co., Inc. | | Oil & Gas Operator | Sep 2001 |
| 2831 | Cwo Energy, LLC | Midland, TX 79705 | Oil Operator | Apr 2025 |
| 2832 | Cwoc | Big Spring, TX 79721 | Oil & Gas Operator | Apr 2025 |
| 2833 | CWS Aceite Operating, Inc. | Cotulla, TX 78014 | Oil & Gas Operator | Aug 2018 |
| 2834 | CWT Operating, LLC | McKinney, TX 75072 | Oil & Gas Operator | Jan 2025 |
| 2835 | CX Disposals LLC | Minco, OK 73059-9472 | Oil Operator | Jan 2025 |
| 2836 | CX Operating LLC | Dallas, TX 75238 | Oil & Gas Operator | Apr 2025 |
| 2837 | CX Operating, Inc. | | Oil & Gas Operator | Oct 2023 |
| 2838 | CXL Energy LLC | Canada, 00100 | Oil & Gas Operator | Apr 2025 |
| 2839 | Cxy Energy, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Nov 2000 |
| 2840 | Cyanostar Energy, Inc | Tulsa, OK 74103-4122 | Oil & Gas Operator | Sep 2001 |
| 2841 | Cyber Enviro-Tech Inc | | Oil Operator | Apr 2025 |
| 2842 | Cycle Oil & Gas Inc. | Katy, TX 77449 | Oil Operator | Apr 2025 |
| 2843 | Cycle Oil & Gas LTD | | Gas Operator | Dec 2024 |
| 2844 | Cyclone Exploration, Inc. | Florence, CO 81226 | Oil & Gas Operator | Apr 2025 |
| 2845 | Cyclone Petroleu | | Oil & Gas Operator | Nov 1995 |
| 2846 | Cyclone Petroleum, Incorporated | Jenks, OK 74037 | Oil & Gas Operator | Dec 2024 |
| 2847 | Cyclops Corp | Pittsburgh, PA 15228 | Oil & Gas Operator | Dec 1992 |
| 2848 | Cygnus Producing Corporation | | Oil & Gas Operator | Feb 1990 |
| 2849 | Cymri Corporation, The | Houston, TX 77057 | Oil & Gas Operator | Mar 2008 |
| 2850 | Cymri, L.L.C. | Houston, TX 77042 | Oil & Gas Operator | Apr 2025 |
| 2851 | Cynpat Oil & Gas, Inc. | Sulphur SPGS, TX 75482 | Oil Operator | Nov 2018 |
| 2852 | Cypress Creek Production Company | Magnolia, AR 71753 | Oil Operator | Jan 2025 |
| 2853 | Cypress E & P Corporation | Leander, TX 78646 | Oil & Gas Operator | Sep 2016 |
| 2854 | Cypress Exploration Company | Tulsa, OK 74132 | Oil & Gas Operator | Jan 2025 |
| 2855 | Cypress Gas Pipeline Company | | Oil Operator | Dec 1998 |
| 2856 | Cypress Gas Pipeline, LLC | | Oil Operator | Sep 2019 |
| 2857 | Cypress Oil Company, Inc. | | Oil & Gas Operator | Aug 2003 |
| 2858 | Cypress Operating, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2025 |
| 2859 | Cypress Partners, Inc. | Houston, TX 77068 | Oil & Gas Operator | May 1999 |
| 2860 | Cypress Production, Inc. | Azle, TX 76020 | Oil & Gas Operator | Apr 2025 |
| 2861 | Cypress Resources | | Oil & Gas Operator | Jul 2004 |
| 2862 | Cyrus, Scott | Louisa, KY 41230 | Oil Operator | Dec 2023 |
| 2863 | Cyrus, Wade T | Fort Gay, WV 25574 | Oil & Gas Operator | Dec 2013 |
| 2864 | Czar Resources Inc | Houston, TX 77060 | Oil & Gas Operator | Oct 1992 |
| 2865 | Czarniak, Dennis G. | Holland, NY 14080 | Gas Operator | Dec 2023 |
| 2866 | Czerniak, Michael A. And Cheryl A. | Lakewood, NY 14750 | Gas Operator | Dec 2023 |
| 2867 | Czesak Dairy Farm, LLC | Chaffee, NY 14030 | Gas Operator | Dec 2023 |
| 2868 | Czworka, Terry D. | Le Roy, NY 14482 | Gas Operator | Dec 2023 |