| 6801 | Crow-Gulf Coast Venture | | Oil & Gas Operator | Aug 1985 |
| 6802 | Crow-Pittman | | Oil Operator | Aug 1993 |
| 6803 | Crowder Oil Co. | | Oil Operator | Sep 2008 |
| 6804 | Crowder Oil L.L.C. | | Oil Operator | Apr 2015 |
| 6805 | Crowe Drilling C | | Oil & Gas Operator | May 1995 |
| 6806 | Crowheart Energy LLC | Baggs, WY 82321 | Oil & Gas Operator | Jun 2026 |
| 6807 | Crown Central Pet Corp | Bellaire, TX 77401 | Oil & Gas Operator | Dec 2016 |
| 6808 | Crown Central Petroleum Corp | Richmond, TX 77469 | Oil & Gas Operator | Dec 1999 |
| 6809 | Crown Consulting Inc | Liberal, KS 67905 | Oil & Gas Operator | Mar 2026 |
| 6810 | Crown Energy Company | Oklahoma City, OK 73106 | Oil & Gas Operator | Jun 2026 |
| 6811 | Crown Energy Partners LLC | Englewood, CO 80112 | Oil & Gas Operator | Sep 2013 |
| 6812 | Crown Equipment Co. | Weatherford, TX 76086 | Oil & Gas Operator | Jun 2026 |
| 6813 | Crown Oil & Gas Co Inc | Labarge, WY 83123 | Oil & Gas Operator | Jan 2023 |
| 6814 | Crown Oil, Inc. | Houston, TX 77002 | Oil Operator | Jan 1999 |
| 6815 | Crown Petroleum Company | Duncan, OK 73534-0938 | Oil & Gas Operator | Jan 2011 |
| 6816 | Crown Petroleum Corp. | Oklahoma City, OK 73106 | Oil & Gas Operator | Sep 2026 |
| 6817 | Crown Well Service Inc | Capon Bridge, WV 26711 | Oil Operator | May 2026 |
| 6818 | Crown Zellerbach | | Oil & Gas Operator | May 1986 |
| 6819 | Crown Zellerbach & Newton | | Oil Operator | May 1986 |
| 6820 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Sep 2026 |
| 6821 | Crozier & Company | Tyler, TX 75703 | Oil & Gas Operator | Jan 2020 |
| 6822 | CRT'S, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Aug 2008 |
| 6823 | Crude Kin Oil Company, Inc. | Louisburg, KS 66053 | Oil Operator | May 2026 |
| 6824 | Crude Oil Recovery Inc /Osage Only | | Oil & Gas Operator | Mar 2006 |
| 6825 | Crude Operators, L.L.C. | Pampa, TX 79066 | Oil & Gas Operator | Sep 2026 |
| 6826 | Crude Producers | | Oil & Gas Operator | Sep 1988 |
| 6827 | Crude Production Company | Clyde, TX 79510 | Oil & Gas Operator | Sep 2026 |
| 6828 | Crude Resources | Sapulpa, OK 74066 | Oil & Gas Operator | Mar 2008 |
| 6829 | Crude Resources, Inc. | Carrollton, TX 75011 | Oil & Gas Operator | Mar 2008 |
| 6830 | Crudewell Drilling, Inc | Albany, KY 42602 | Oil Operator | Dec 2023 |
| 6831 | Crump Operating | Henrietta, TX 76365 | Oil & Gas Operator | Sep 2026 |
| 6832 | Crump Petroleum Corp | Midland, TX 79710 | Oil & Gas Operator | Feb 1999 |
| 6833 | Crumpler Oil | | Oil & Gas Operator | Nov 2024 |
| 6834 | Crumpton H A | Duncan, OK 73533 | Oil Operator | Dec 2002 |
| 6835 | Crupper Operating & Trading Company | | Oil & Gas Operator | Dec 1996 |
| 6836 | Crusader Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2011 |
| 6837 | Crusader Energy Group Inc. | Austin, TX 78746 | Oil & Gas Operator | Mar 2015 |
| 6838 | Crusader Energy Group LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2015 |
| 6839 | Crusader Energy II LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 6840 | Crusader Energy III LLC | Oklahoma City, OK 73142-1856 | Oil & Gas Operator | Feb 2011 |
| 6841 | Crusader Resources LC | Sugar Land, TX 77479 | Oil Operator | Sep 2026 |
| 6842 | Crusher Oil Company | Ponca City, OK 74604-5612 | Oil Operator | Apr 2017 |
| 6843 | Crutcher Oil Properties | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 2026 |
| 6844 | Cruthird, Mark Oil | Grandfield, OK 73546 | Oil & Gas Operator | Sep 2026 |
| 6845 | Cruzen Drilling Company Inc | Cleveland, OK 74020-0470 | Oil Operator | Nov 2014 |
| 6846 | Crystal Carbon Company | | Gas Operator | Dec 1930 |
| 6847 | Crystal Energy Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Feb 2019 |
| 6848 | Crystal Exploration & Production Company | Shreveport, LA 71120 | Oil & Gas Operator | Feb 1995 |
| 6849 | Crystal Exploration Co | | Oil & Gas Operator | Dec 2009 |
| 6850 | Crystal Gas, L.L.C. | | Oil & Gas Operator | Apr 2000 |
| 6851 | Crystal J Oil And Gas LLC | San Angelo, TX 76904 | Oil & Gas Operator | Sep 2026 |
| 6852 | Crystal Oil And Land Company | | Oil & Gas Operator | May 1992 |
| 6853 | Crystal Oil Company | Shreveport, LA 71120 | Oil & Gas Operator | Jul 1995 |
| 6854 | Crystal River Oil & Gas LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Jan 2023 |
| 6855 | Csa Exploration Company, Inc. | Houston, TX 77027 | Oil & Gas Operator | Aug 2003 |
| 6856 | Csapo Limited | Creston, OH 44217 | Oil & Gas Operator | Dec 2012 |
| 6857 | CSC Energy Corp. | | Oil & Gas Operator | Dec 2009 |
| 6858 | CSC, Inc. | | Oil Operator | Jan 2000 |
| 6859 | CSD IV Oil LLC | Columbus, OH 43209 | Oil Operator | Dec 2025 |
| 6860 | CSL Exploration, LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2018 |
| 6861 | CSM, Inc. | | Gas Operator | Oct 1990 |
| 6862 | Cso Consulting | Bridgeport, TX 76426 | Oil & Gas Operator | Mar 2020 |
| 6863 | Csoda Operating Company LLC | Amarillo, TX 79114-7506 | Oil & Gas Operator | Aug 2021 |
| 6864 | CSV Holdings, Inc. | | Oil & Gas Operator | Dec 2014 |
| 6865 | CSX Oil & Gas Corporation | Houston, TX 77210-4326 | Oil & Gas Operator | Mar 1993 |
| 6866 | CT Adams Jr., LLC | Schulenburg, TX 78956 | Oil Operator | Sep 2026 |
| 6867 | CTC Oil Co., Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 2026 |
| 6868 | Cti Associates | | Gas Operator | Jan 1990 |
| 6869 | Cti Well Service, LLC | | Oil Operator | Jun 2026 |
| 6870 | CTL Oil & Gas Corporation | Buchanan Dam, TX 78609 | Oil & Gas Operator | Nov 2020 |
| 6871 | CTL Production, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Sep 2026 |
| 6872 | Ctoc Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2026 |
| 6873 | CTR 247 LLC | Peru, KS 67360 | Oil Operator | May 2026 |
| 6874 | CTR Petroleum, Inc. | Corpus Chrsti, TX 78414 | Oil & Gas Operator | Mar 2015 |
| 6875 | CTX Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Aug 2003 |
| 6876 | Cuatro Oil And Gas Corporation | Abilene, TX 79603 | Oil & Gas Operator | Sep 2026 |
| 6877 | Cuatro Petro Corp. | Richardson, TX 75080 | Oil & Gas Operator | Sep 2026 |
| 6878 | Cub Creek Energy LLC | | Oil & Gas Operator | Mar 2019 |
| 6879 | Cuba, John H. | Olney, TX 76374 | Oil Operator | Sep 2026 |
| 6880 | Cucharas Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Dec 2000 |
| 6881 | Cudd Operating Corp | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 2020 |
| 6882 | Cuervo Resources, Inc. | FT Stockton, TX 79735 | Oil & Gas Operator | Oct 1996 |
| 6883 | Cuervo, Inc. | FT Stockton, TX 79735 | Oil & Gas Operator | Sep 2026 |
| 6884 | Cuesta Petroleum Inc | Shawnee, OK 74801-6963 | Oil & Gas Operator | Jun 2026 |
| 6885 | Culbreath Oil & Gas Co Inc | Tulsa, OK 74135 | Oil & Gas Operator | Jul 2026 |
| 6886 | Culebra Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Dec 2000 |
| 6887 | Culebra Oil & Gas, LLC | Shiner, TX 77984 | Oil & Gas Operator | Sep 2026 |
| 6888 | Cullen Corporati | | Oil & Gas Operator | Jan 1993 |
| 6889 | Cullison, Jimmie I. | Moscow, KS 67952 | Oil Operator | Apr 2002 |
| 6890 | Culoco, Inc. | Dallas, TX 75374 | Oil & Gas Operator | Nov 2024 |
| 6891 | Culp & Copple Oil Company | Cushing, OK 74023 | Oil & Gas Operator | May 2026 |
| 6892 | Culver & Cain Production LLC | Tyler, TX 75711 | Oil & Gas Operator | Sep 2026 |
| 6893 | Culver & Grounds | | Oil & Gas Operator | Nov 1995 |
| 6894 | Culver & Grounds Oil Properties, Inc. | McPherson, KS 67460 | Oil Operator | May 2026 |
| 6895 | Cumberland Gas Co.(Tree Preservation Co) | | Oil & Gas Operator | Dec 1996 |
| 6896 | Cumberland Harlan Expl Corp | Barbourville, KY 40906 | Oil & Gas Operator | Dec 2024 |
| 6897 | Cumberland Operating Company | Seminole, OK 74868-1258 | Oil & Gas Operator | Mar 2007 |
| 6898 | Cumberland Operating LLC | Cody, WY 82414 | Oil & Gas Operator | Jul 2026 |
| 6899 | Cumberland Petroleum, Inc. II | Weatherford, TX 76086 | Oil & Gas Operator | May 1997 |
| 6900 | Cumberland River Oil & Gas, Inc | Williamsburg, KY 40769 | Oil & Gas Operator | Dec 2024 |