| 2701 | Crow-Gulf Coast Venture | | Oil & Gas Operator | Aug 1985 |
| 2702 | Crow-Pittman | | Oil Operator | Aug 1993 |
| 2703 | Crowder Oil Co. | | Oil Operator | Sep 2008 |
| 2704 | Crowder Oil L.L.C. | | Oil Operator | Apr 2015 |
| 2705 | Crowe Drilling C | | Oil & Gas Operator | May 1995 |
| 2706 | Crowheart Energy LLC | Baggs, WY 82321 | Oil & Gas Operator | Nov 2025 |
| 2707 | Crowley Oil Co LLC | Turtlepoint, PA 16750-1620 | Oil & Gas Operator | Dec 2024 |
| 2708 | Crown Central Pet Corp | Bellaire, TX 77401 | Oil & Gas Operator | Dec 2016 |
| 2709 | Crown Central Petroleum Corp | Richmond, TX 77469 | Oil & Gas Operator | Dec 1999 |
| 2710 | Crown Consulting Inc | Liberal, KS 67905 | Oil & Gas Operator | Sep 2025 |
| 2711 | Crown Energy Company | Oklahoma City, OK 73106 | Oil & Gas Operator | Nov 2025 |
| 2712 | Crown Energy Partners LLC | Englewood, CO 80112 | Oil & Gas Operator | Sep 2013 |
| 2713 | Crown Equipment Co. | Weatherford, TX 76086 | Oil & Gas Operator | Feb 2026 |
| 2714 | Crown Natural Gas Inc | Silver City, NM 88061-9350 | Gas Operator | Sep 2014 |
| 2715 | Crown Oil & Gas Co Inc | Labarge, WY 83123 | Oil & Gas Operator | Jan 2023 |
| 2716 | Crown Oil, Inc. | Houston, TX 77002 | Oil Operator | Jan 1999 |
| 2717 | Crown Petroleum Company | Duncan, OK 73534-0938 | Oil & Gas Operator | Jan 2011 |
| 2718 | Crown Petroleum Corp. | Oklahoma City, OK 73106 | Oil & Gas Operator | Feb 2026 |
| 2719 | Crown Well Service Inc | Capon Bridge, WV 26711 | Oil Operator | Sep 2025 |
| 2720 | Crown Zellerbach | | Oil & Gas Operator | May 1986 |
| 2721 | Crown Zellerbach & Newton | | Oil Operator | May 1986 |
| 2722 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 2723 | Crozier & Company | Tyler, TX 75703 | Oil & Gas Operator | Jan 2020 |
| 2724 | CRT'S, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Aug 2008 |
| 2725 | Crude Kin Oil Company, Inc. | Louisburg, KS 66053 | Oil Operator | Sep 2025 |
| 2726 | Crude Oil Recovery Inc /Osage Only | | Oil & Gas Operator | Mar 2006 |
| 2727 | Crude Operators, L.L.C. | Pampa, TX 79066 | Oil & Gas Operator | Feb 2026 |
| 2728 | Crude Producers | | Oil & Gas Operator | Sep 1988 |
| 2729 | Crude Production Company | Clyde, TX 79510 | Oil & Gas Operator | Feb 2026 |
| 2730 | Crude Resources | Sapulpa, OK 74066 | Oil & Gas Operator | Mar 2008 |
| 2731 | Crude Resources, Inc. | Carrollton, TX 75011 | Oil & Gas Operator | Mar 2008 |
| 2732 | Crudewell Drilling, Inc | Albany, KY 42602 | Oil Operator | Dec 2023 |
| 2733 | Cruise Energy Inc | Ravenna, OH 44266 | Oil & Gas Operator | Dec 2024 |
| 2734 | Crump Operating | Henrietta, TX 76365 | Oil & Gas Operator | Feb 2026 |
| 2735 | Crump Petroleum Corp | Midland, TX 79710 | Oil & Gas Operator | Feb 1999 |
| 2736 | Crumpler Oil | | Oil & Gas Operator | Nov 2024 |
| 2737 | Crumpton H A | Duncan, OK 73533 | Oil Operator | Dec 2002 |
| 2738 | Crupper Operating & Trading Company | | Oil & Gas Operator | Dec 1996 |
| 2739 | Crusader Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2011 |
| 2740 | Crusader Energy Group Inc. | Austin, TX 78746 | Oil & Gas Operator | Mar 2015 |
| 2741 | Crusader Energy Group LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2015 |
| 2742 | Crusader Energy II LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 2743 | Crusader Energy III LLC | Oklahoma City, OK 73142-1856 | Oil & Gas Operator | Feb 2011 |
| 2744 | Crusader Resources LC | Sugar Land, TX 77479 | Oil Operator | Feb 2026 |
| 2745 | Crusher Oil Company | Ponca City, OK 74604-5612 | Oil Operator | Apr 2017 |
| 2746 | Crutcher Oil Properties | Wichita Falls, TX 76301 | Oil & Gas Operator | Feb 2026 |
| 2747 | Cruthird, Mark Oil | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 2748 | Cruzen Drilling Company Inc | Cleveland, OK 74020-0470 | Oil Operator | Nov 2014 |
| 2749 | Crystal Carbon Company | | Gas Operator | Dec 1930 |
| 2750 | Crystal Energy Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Feb 2019 |
| 2751 | Crystal Exploration & Production Company | Shreveport, LA 71120 | Oil & Gas Operator | Feb 1995 |
| 2752 | Crystal Exploration Co | | Oil & Gas Operator | Dec 2009 |
| 2753 | Crystal Gas, L.L.C. | | Oil & Gas Operator | Apr 2000 |
| 2754 | Crystal Oil And Land Company | | Oil & Gas Operator | May 1992 |
| 2755 | Crystal Oil Company | Shreveport, LA 71120 | Oil & Gas Operator | Jul 1995 |
| 2756 | Crystal River Oil & Gas LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Jan 2023 |
| 2757 | Csa Exploration Company, Inc. | Houston, TX 77027 | Oil & Gas Operator | Aug 2003 |
| 2758 | Csapo Limited | Creston, OH 44217 | Oil & Gas Operator | Dec 2012 |
| 2759 | CSC Energy Corp. | | Oil & Gas Operator | Dec 2009 |
| 2760 | CSC, Inc. | | Oil Operator | Jan 2000 |
| 2761 | CSD IV Oil LLC | Columbus, OH 43209 | Oil Operator | Dec 2024 |
| 2762 | CSL Exploration, LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2018 |
| 2763 | CSM, Inc. | | Gas Operator | Oct 1990 |
| 2764 | Cso Consulting | Bridgeport, TX 76426 | Oil & Gas Operator | Mar 2020 |
| 2765 | Csoda Operating Company LLC | Amarillo, TX 79114-7506 | Oil & Gas Operator | Aug 2021 |
| 2766 | CSV Holdings, Inc. | | Oil & Gas Operator | Dec 2014 |
| 2767 | CSX Oil & Gas Corporation | Houston, TX 77210-4326 | Oil & Gas Operator | Mar 1993 |
| 2768 | CT Adams Jr., LLC | Schulenburg, TX 78956 | Oil Operator | Feb 2026 |
| 2769 | CTC Oil Co., Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2026 |
| 2770 | Cti Associates | | Gas Operator | Jan 1990 |
| 2771 | CTL Oil & Gas Corporation | Buchanan Dam, TX 78609 | Oil & Gas Operator | Nov 2020 |
| 2772 | CTL Production, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Feb 2026 |
| 2773 | CTR 247 LLC | Peru, KS 67360 | Oil Operator | Jul 2025 |
| 2774 | CTR Petroleum, Inc. | Corpus Chrsti, TX 78414 | Oil & Gas Operator | Mar 2015 |
| 2775 | CTX Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Aug 2003 |
| 2776 | Cuatro Oil And Gas Corporation | Abilene, TX 79603 | Oil & Gas Operator | Feb 2026 |
| 2777 | Cuatro Petro Corp. | Richardson, TX 75080 | Oil & Gas Operator | Feb 2026 |
| 2778 | Cub Creek Energy LLC | | Oil & Gas Operator | Mar 2019 |
| 2779 | Cuba, John H. | Olney, TX 76374 | Oil Operator | Feb 2026 |
| 2780 | Cucharas Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Dec 2000 |
| 2781 | Cudd Operating Corp | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 2020 |
| 2782 | Cuervo Resources, Inc. | FT Stockton, TX 79735 | Oil & Gas Operator | Oct 1996 |
| 2783 | Cuervo, Inc. | FT Stockton, TX 79735 | Oil & Gas Operator | Feb 2026 |
| 2784 | Cuesta Petroleum Inc | Shawnee, OK 74801-6963 | Oil & Gas Operator | Nov 2025 |
| 2785 | Culbreath Oil & Gas Co Inc | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2025 |
| 2786 | Culebra Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Dec 2000 |
| 2787 | Culebra Oil & Gas, LLC | Kerrville, TX 78028 | Oil & Gas Operator | Feb 2026 |
| 2788 | Cullen Corporati | | Oil & Gas Operator | Jan 1993 |
| 2789 | Cullison, Jimmie I. | Moscow, KS 67952 | Oil Operator | Apr 2002 |
| 2790 | Culoco, Inc. | Dallas, TX 75374 | Oil & Gas Operator | Nov 2024 |
| 2791 | Culp & Copple Oil Company | Cushing, OK 74023 | Oil & Gas Operator | Nov 2025 |
| 2792 | Culver & Cain Production LLC | Tyler, TX 75711 | Oil & Gas Operator | Feb 2026 |
| 2793 | Culver & Grounds | | Oil & Gas Operator | Nov 1995 |
| 2794 | Culver & Grounds Oil Properties, Inc. | McPherson, KS 67460 | Oil Operator | Sep 2025 |
| 2795 | Cuma Oil Company, Inc | Oklahoma City, OK 73102-4001 | Gas Operator | Aug 2013 |
| 2796 | Cumberland Exploration | Cleveland, OH 44111 | Oil & Gas Operator | Dec 1985 |
| 2797 | Cumberland Gas Co.(Tree Preservation Co) | | Oil & Gas Operator | Dec 1996 |
| 2798 | Cumberland Harlan Expl Corp | Barbourville, KY 40906 | Oil & Gas Operator | Dec 2023 |
| 2799 | Cumberland Operating Company | Seminole, OK 74868-1258 | Oil & Gas Operator | Mar 2007 |
| 2800 | Cumberland Operating LLC | Cody, WY 82414 | Oil & Gas Operator | Dec 2025 |