| 2701 | Culver & Grounds | | Oil & Gas Operator | Nov 1995 |
| 2702 | Culver & Grounds Oil Properties, Inc. | McPherson, KS 67460 | Oil Operator | Jul 2024 |
| 2703 | Cumberland Gas Co.(Tree Preservation Co) | | Oil & Gas Operator | Dec 1996 |
| 2704 | Cumberland Harlan Expl Corp | Barbourville, KY 40906 | Oil & Gas Operator | Dec 2018 |
| 2705 | Cumberland Operating Company | Seminole, OK 74868-1258 | Oil & Gas Operator | Mar 2007 |
| 2706 | Cumberland Operating LLC | Cody, WY 82414 | Oil & Gas Operator | Sep 2024 |
| 2707 | Cumberland Petroleum, Inc. II | Weatherford, TX 76086 | Oil & Gas Operator | May 1997 |
| 2708 | Cumberland River Oil & Gas, Inc | Williamsburg, KY 40769 | Oil & Gas Operator | Dec 2022 |
| 2709 | Cumberland Valley Resources, LLC | Louisville, KY 40204 | Oil & Gas Operator | Dec 2022 |
| 2710 | Cumming Company, Inc. The | Fort Worth, TX 76116 | Oil & Gas Operator | Nov 2024 |
| 2711 | Cummings Gene | | Oil Operator | Dec 2000 |
| 2712 | Cummings Oil & Cattle | Ada, OK 74820-0994 | Oil Operator | Jan 2017 |
| 2713 | Cummings Oil Company | Oklahoma City, OK 73112-6113 | Oil & Gas Operator | Sep 2024 |
| 2714 | Cummings, C. M. Oil & Gas | Lewisville, TX 75029 | Oil & Gas Operator | Nov 1993 |
| 2715 | Cummins & Walker Oil Co., Inc. | Austin, TX 78746 | Oil & Gas Operator | Jan 2021 |
| 2716 | Cummins Wren Oil Company | Tulsa, OK 74135 | Oil & Gas Operator | Nov 1998 |
| 2717 | Cundiff Harold | Perkins, OK 74059-4199 | Oil & Gas Operator | Jun 2024 |
| 2718 | Cundiff Jack | Perkins, OK 74059-4198 | Oil & Gas Operator | Apr 2014 |
| 2719 | Cundiff Operating Company | Dallas, TX 75238 | Oil & Gas Operator | Nov 2024 |
| 2720 | Cunningham Crude, A General Partnership | Independence, KS 67301 | Oil Operator | Jul 2024 |
| 2721 | Cunningham Energy LLC | Charleston, WV 25302 | Oil & Gas Operator | Dec 2021 |
| 2722 | Cunningham, Melvin | Medicine Lodge, KS 67104 | Oil Operator | Jan 2013 |
| 2723 | Cur-Ric Petrol & Gas Corp | Las Vegas, NV 89120-4003-4003 | Oil Operator | Dec 1985 |
| 2724 | Curmar Producers | Adairsville, GA 30103 | Oil Operator | Mar 2008 |
| 2725 | Curn Lisa | Steubenville, OH 43952-2535 | Oil Operator | Aug 2024 |
| 2726 | Curran Oil Co | Great Falls, MT 59401 | Gas Operator | May 2001 |
| 2727 | Currie Cattle Co. | Big Spring, TX 79720 | Oil & Gas Operator | Sep 2007 |
| 2728 | Currie, V. Monta, Jr. | | Gas Operator | Nov 1990 |
| 2729 | Curry Oil | | Oil Operator | May 2005 |
| 2730 | Curry R D Production Co | Memphis, TN 38103 | Oil & Gas Operator | Dec 1986 |
| 2731 | Curry, Gregg | Madison, KS 66860 | Oil Operator | Jul 2024 |
| 2732 | Curt Weaver Et Al | | Oil Operator | Apr 1982 |
| 2733 | Curt'S Oil Opera | | Oil Operator | Nov 1994 |
| 2734 | Curt'S Oil Operation, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Jul 2024 |
| 2735 | Curtis & Son Oil Inc | Sugar Grove, PA 16350 | Oil & Gas Operator | Dec 2023 |
| 2736 | Curtis Beard & Huston P. Ganey | | Oil Operator | Mar 1987 |
| 2737 | Curtis F. Adams | | Oil & Gas Operator | May 2024 |
| 2738 | Curtis Hankamer | Houston, TX 77024 | Oil & Gas Operator | Jun 1997 |
| 2739 | Curtis J Little | Farmington, NM 87499 | Oil & Gas Operator | Aug 2005 |
| 2740 | Curtis Oil Inc | Duke Center, PA 16729-0287 | Oil & Gas Operator | Dec 2023 |
| 2741 | Curton Capital Corp | | Oil Operator | Sep 2015 |
| 2742 | Curzac Oil And Gas, LLC | Plano, TX 75075 | Oil & Gas Operator | Nov 2024 |
| 2743 | Curzon Operating Company LTD | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Aug 2024 |
| 2744 | Custer & Wright Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Nov 2024 |
| 2745 | Custer K. Primos | | Oil & Gas Operator | Oct 2002 |
| 2746 | Custom Service LLC | St John, KS 67576 | Oil Operator | Jul 2024 |
| 2747 | Cut Bank Gas Company | Cut Bank, MT 59427 | Gas Operator | Sep 2024 |
| 2748 | Cut Through Hydrocarbon | Florence, KY 41042 | Gas Operator | Dec 2019 |
| 2749 | Cutbow Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Nov 2024 |
| 2750 | Cutler Oil, LLC | Rantoul, KS 66079 | Oil Operator | May 2024 |
| 2751 | Cutter Exploration Inc | Oviedo, FL 32765-0476-0476 | Oil & Gas Operator | Dec 2023 |
| 2752 | Cutter Oil Company | West Salem, OH 44287 | Oil & Gas Operator | Dec 2018 |
| 2753 | Cutter Oil LLC | West Salem, OH 44287 | Oil & Gas Operator | Dec 2023 |
| 2754 | Cuyahoga Expl & Develop | Marietta, OH 45750 | Oil & Gas Operator | Dec 1986 |
| 2755 | Cuyahoga Expl. & Devel. Corp. | Jericho, NY 11753 | Oil & Gas Operator | Dec 1996 |
| 2756 | CVR Supply & Trading LLC | Sugar Land, TX 77479 | Oil & Gas Operator | Apr 2024 |
| 2757 | CVS Operating, LLC. | Plano, TX 75074 | Oil & Gas Operator | Nov 2024 |
| 2758 | CVS Production, LLC. | Plano, TX 75074 | Oil Operator | Nov 2024 |
| 2759 | CW Dalcan Management SVCS, LTD. | Frisco, TX 75033 | Oil Operator | Nov 2024 |
| 2760 | CW Investments | Okmulgee, OK 74447-4026 | Oil & Gas Operator | Aug 2024 |
| 2761 | CWB Energy Inc | Oklahoma City, OK 73139-8837 | Oil Operator | May 2000 |
| 2762 | CWB Oil Company, LLC | St. Francis, KS 67756 | Oil Operator | Jul 2024 |
| 2763 | CWC Oil & Gas, LLC | Abilene, TX 79608 | Oil & Gas Operator | Nov 2024 |
| 2764 | CWC Petro LLC | | Gas Operator | Aug 2023 |
| 2765 | CWD Resources, LLC | Kilgore, TX 75663 | Oil Operator | Nov 2024 |
| 2766 | CWF Associates, LTD. | | Oil & Gas Operator | Apr 1988 |
| 2767 | CWF Energy, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Jul 1997 |
| 2768 | Cwic, Inc. | Granbury, TX 76049 | Oil & Gas Operator | Nov 2024 |
| 2769 | CWJ Operating Co., Inc. | | Oil & Gas Operator | Sep 2001 |
| 2770 | Cwo Energy, LLC | Midland, TX 79705 | Oil Operator | Nov 2024 |
| 2771 | Cwoc | Big Spring, TX 79721 | Oil & Gas Operator | Nov 2024 |
| 2772 | CWS Aceite Operating, Inc. | Cotulla, TX 78014 | Oil & Gas Operator | Aug 2018 |
| 2773 | CWT Operating, LLC | McKinney, TX 75072 | Oil & Gas Operator | Sep 2024 |
| 2774 | CX Disposals LLC | Minco, OK 73059-9472 | Oil Operator | Aug 2024 |
| 2775 | CX Operating LLC | Dallas, TX 75238 | Oil & Gas Operator | Nov 2024 |
| 2776 | CX Operating, Inc. | | Oil & Gas Operator | Oct 2023 |
| 2777 | CXL Energy LLC | Canada, 00100 | Oil & Gas Operator | Nov 2024 |
| 2778 | Cxy Energy, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Nov 2000 |
| 2779 | Cyanostar Energy, Inc | Tulsa, OK 74103-4122 | Oil & Gas Operator | Sep 2001 |
| 2780 | Cyber Enviro-Tech Inc | | Oil Operator | Nov 2024 |
| 2781 | Cycle Oil & Gas Inc. | Graham, TX 76450 | Oil Operator | Nov 2024 |
| 2782 | Cycle Oil & Gas LTD | | Gas Operator | Jan 2023 |
| 2783 | Cyclone Exploration, Inc. | Florence, CO 81226 | Oil & Gas Operator | Nov 2024 |
| 2784 | Cyclone Petroleu | | Oil & Gas Operator | Nov 1995 |
| 2785 | Cyclone Petroleum, Incorporated | Jenks, OK 74037 | Oil & Gas Operator | Jul 2024 |
| 2786 | Cyclops Corp | Pittsburgh, PA 15228 | Oil & Gas Operator | Dec 1992 |
| 2787 | Cygnus Producing Corporation | | Oil & Gas Operator | Feb 1990 |
| 2788 | Cymri Corporation, The | Houston, TX 77057 | Oil & Gas Operator | Mar 2008 |
| 2789 | Cymri, L.L.C. | Houston, TX 77042 | Oil & Gas Operator | Nov 2024 |
| 2790 | Cynpat Oil & Gas, Inc. | Sulphur SPGS, TX 75482 | Oil Operator | Nov 2018 |
| 2791 | Cypress Creek Production Company | Magnolia, AR 71753 | Oil Operator | Jun 2024 |
| 2792 | Cypress E & P Corporation | Leander, TX 78646 | Oil & Gas Operator | Sep 2016 |
| 2793 | Cypress Exploration Company | Tulsa, OK 74132 | Oil & Gas Operator | Aug 2024 |
| 2794 | Cypress Gas Pipeline Company | | Oil Operator | Dec 1998 |
| 2795 | Cypress Gas Pipeline, LLC | | Oil Operator | Sep 2019 |
| 2796 | Cypress Oil Company, Inc. | | Oil & Gas Operator | Aug 2003 |
| 2797 | Cypress Operating, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2024 |
| 2798 | Cypress Partners, Inc. | Houston, TX 77068 | Oil & Gas Operator | May 1999 |
| 2799 | Cypress Production, Inc. | Azle, TX 76020 | Oil & Gas Operator | Nov 2024 |
| 2800 | Cypress Resources | | Oil & Gas Operator | Jul 2004 |