| 6901 | Cross Creek Corporation | Duncan, OK 73534 | Oil & Gas Operator | Mar 1999 |
| 6902 | Cross Creek Energy LLC | Houston, TX 77074 | Oil & Gas Operator | Aug 2013 |
| 6903 | Cross Cut Petroleum, LLC | Abilene, TX 79602 | Oil Operator | Jul 2025 |
| 6904 | Cross Development Co. | | Oil Operator | Dec 1989 |
| 6905 | Cross Development-MMHS PRTSHP. | | Oil Operator | May 1987 |
| 6906 | Cross Development1984-1 PRTSHP | | Oil & Gas Operator | Sep 1990 |
| 6907 | Cross Don | Cushing, OK 74023-6316 | Oil & Gas Operator | Feb 2022 |
| 6908 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2025 |
| 6909 | Cross Timbers Oil Company | Dallas, TX 75284 | Oil & Gas Operator | May 2013 |
| 6910 | Cross Timbers Op | | Oil & Gas Operator | Nov 1996 |
| 6911 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 6912 | Cross Timbers Production Co | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 2005 |
| 6913 | Cross Winds Oil & Gas, LLC | Gruver, TX 79040 | Gas Operator | Jul 2025 |
| 6914 | Cross, Don E | | Oil & Gas Operator | Jan 2013 |
| 6915 | Crossbow Resources, LLC | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 6916 | Crossfield Larry | | Oil & Gas Operator | Sep 1993 |
| 6917 | Crossfoot Operating, LLC | Houston, TX 77227 | Oil & Gas Operator | Jul 2025 |
| 6918 | Crossing Rocks Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2018 |
| 6919 | Crossland Oil & Gas | Dallas, TX 75205 | Oil & Gas Operator | Aug 1994 |
| 6920 | Crossley, Patricia J. | Kennedy, NY 14747 | Gas Operator | Dec 2024 |
| 6921 | Crosspoint Energy Company | Dallas, TX 75205 | Oil & Gas Operator | Oct 2007 |
| 6922 | Crossroads Energy Development, LLC | | Oil Operator | Mar 2018 |
| 6923 | Crossroads Energy L.P. | Houston, TX 77064 | Oil & Gas Operator | Jun 2011 |
| 6924 | Crossroads Energy Partners, LLC | Houston, TX 77070 | Oil & Gas Operator | Mar 2018 |
| 6925 | Crossroads Mineral Prod., L.L.C. | Seguin, TX 78155 | Oil Operator | Jul 2025 |
| 6926 | Crossroads Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Jul 2025 |
| 6927 | Crossroads Petroleum L.L.C. | San Benito, TX 78586 | Oil & Gas Operator | Jul 2025 |
| 6928 | Crossroads Vacuum & Weld. Serv. | Luling, TX 78648 | Oil Operator | Mar 2010 |
| 6929 | Crosstex Lig, LLC | | Oil Operator | Mar 2014 |
| 6930 | Crosstex Processing SVCS, LLC | | Oil Operator | Mar 2014 |
| 6931 | Crosstex Services, L.L.C. | Tuscola, TX 79562 | Oil Operator | Jul 2025 |
| 6932 | Crosstex Treating Services, L.P. | | Oil Operator | Sep 2009 |
| 6933 | Crouch Petroleum Company | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2015 |
| 6934 | Crouch, Eugene Louis | Lockhart, TX 78644 | Oil & Gas Operator | Apr 1999 |
| 6935 | Crow Creek Operating Co II LLC | Houston, TX 77252 | Oil & Gas Operator | Jul 2011 |
| 6936 | Crow Creek Operating Co III LLC | Tulsa, OK 74137-8432 | Oil & Gas Operator | Apr 2015 |
| 6937 | Crow Oil LLC | Tulsa, OK 74133-2914 | Oil & Gas Operator | Sep 2019 |
| 6938 | Crow, David | Shreveport, LA 71106 | Oil & Gas Operator | May 2001 |
| 6939 | Crow, Donald | Gerry, NY 14740 | Gas Operator | Dec 2024 |
| 6940 | Crow-Eason | | Oil & Gas Operator | Feb 1984 |
| 6941 | Crow-Gulf Coast Venture | | Oil & Gas Operator | Aug 1985 |
| 6942 | Crow-Pittman | | Oil Operator | Aug 1993 |
| 6943 | Crowder Oil Co. | | Oil Operator | Sep 2008 |
| 6944 | Crowder Oil L.L.C. | | Oil Operator | Apr 2015 |
| 6945 | Crowe Drilling C | | Oil & Gas Operator | May 1995 |
| 6946 | Crowheart Energy LLC | Baggs, WY 82321 | Oil & Gas Operator | May 2025 |
| 6947 | Crown Central Pet Corp | Bellaire, TX 77401 | Oil & Gas Operator | Dec 2016 |
| 6948 | Crown Central Petroleum Corp | Richmond, TX 77469 | Oil & Gas Operator | Dec 1999 |
| 6949 | Crown Consulting, Inc. | Liberal, KS 67905 | Oil & Gas Operator | Mar 2025 |
| 6950 | Crown Energy Company | Oklahoma City, OK 73106 | Oil & Gas Operator | Apr 2025 |
| 6951 | Crown Energy Partners LLC | Englewood, CO 80112 | Oil & Gas Operator | Sep 2013 |
| 6952 | Crown Equipment Co. | Weatherford, TX 76086 | Oil & Gas Operator | Jul 2025 |
| 6953 | Crown Oil & Gas Co Inc | Labarge, WY 83123 | Oil & Gas Operator | Jan 2023 |
| 6954 | Crown Oil, Inc. | Houston, TX 77002 | Oil Operator | Jan 1999 |
| 6955 | Crown Petroleum Company | Duncan, OK 73534-0938 | Oil & Gas Operator | Jan 2011 |
| 6956 | Crown Petroleum Corp. | Oklahoma City, OK 73106 | Oil & Gas Operator | Jul 2025 |
| 6957 | Crown Well Service Inc | Capon Bridge, WV 26711 | Oil Operator | Mar 2025 |
| 6958 | Crown Zellerbach | | Oil & Gas Operator | May 1986 |
| 6959 | Crown Zellerbach & Newton | | Oil Operator | May 1986 |
| 6960 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 6961 | Crozier & Company | Tyler, TX 75703 | Oil & Gas Operator | Jan 2020 |
| 6962 | CRT'S, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Aug 2008 |
| 6963 | Crude Kin Oil Company, Inc. | Louisburg, KS 66053 | Oil Operator | Mar 2025 |
| 6964 | Crude Oil Recovery Inc /Osage Only | | Oil & Gas Operator | Mar 2006 |
| 6965 | Crude Operators, L.L.C. | Pampa, TX 79066 | Oil & Gas Operator | Jul 2025 |
| 6966 | Crude Producers | | Oil & Gas Operator | Sep 1988 |
| 6967 | Crude Production Company | Clyde, TX 79510 | Oil & Gas Operator | Jul 2025 |
| 6968 | Crude Resources | Sapulpa, OK 74066 | Oil & Gas Operator | Mar 2008 |
| 6969 | Crude Resources, Inc. | Carrollton, TX 75011 | Oil & Gas Operator | Mar 2008 |
| 6970 | Crudewell Drilling, Inc | Albany, KY 42602 | Oil Operator | Dec 2023 |
| 6971 | Cruise Energy Inc | Ravenna, OH 44266 | Oil & Gas Operator | Dec 2024 |
| 6972 | Crumley* Jack | | Oil Operator | Aug 2018 |
| 6973 | Crump Operating | Henrietta, TX 76365 | Oil & Gas Operator | Jul 2025 |
| 6974 | Crump Petroleum Corp | Midland, TX 79710 | Oil & Gas Operator | Feb 1999 |
| 6975 | Crumpler Oil | | Oil & Gas Operator | Nov 2024 |
| 6976 | Crumpton H A | Duncan, OK 73533 | Oil Operator | Dec 2002 |
| 6977 | Crupper Operating & Trading Company | | Oil & Gas Operator | Dec 1996 |
| 6978 | Crusader Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2011 |
| 6979 | Crusader Energy Group Inc. | Austin, TX 78746 | Oil & Gas Operator | Mar 2015 |
| 6980 | Crusader Energy Group LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2015 |
| 6981 | Crusader Energy II LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 6982 | Crusader Energy III LLC | Oklahoma City, OK 73142-1856 | Oil & Gas Operator | Feb 2011 |
| 6983 | Crusader Resources LC | Sugar Land, TX 77479 | Oil Operator | Jul 2025 |
| 6984 | Crusher Oil Company | Ponca City, OK 74604-5612 | Oil Operator | Apr 2017 |
| 6985 | Crutcher Oil Properties | Wichita Falls, TX 76301 | Oil & Gas Operator | Jul 2025 |
| 6986 | Cruthird, Mark Oil | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2025 |
| 6987 | Cruzen Drilling Company Inc | Cleveland, OK 74020-0470 | Oil Operator | Nov 2014 |
| 6988 | Crystal Carbon Company | | Gas Operator | Dec 1930 |
| 6989 | Crystal Energy Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Feb 2019 |
| 6990 | Crystal Expl Co, Inc | | Oil & Gas Operator | Dec 2009 |
| 6991 | Crystal Exploration & Production Company | Shreveport, LA 71120 | Oil & Gas Operator | Feb 1995 |
| 6992 | Crystal Gas, L.L.C. | | Oil & Gas Operator | Apr 2000 |
| 6993 | Crystal Oil And Land Company | | Oil & Gas Operator | May 1992 |
| 6994 | Crystal Oil Company | Shreveport, LA 71120 | Oil & Gas Operator | Jul 1995 |
| 6995 | Crystal River Oil & Gas LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Jan 2023 |
| 6996 | Crystal Waters, LLC | | Oil & Gas Operator | Dec 2021 |
| 6997 | Csa Exploration Company, Inc. | Houston, TX 77027 | Oil & Gas Operator | Aug 2003 |
| 6998 | Csapo Limited | Creston, OH 44217 | Oil & Gas Operator | Dec 2012 |
| 6999 | CSC Energy Corp. | | Oil & Gas Operator | Dec 2009 |
| 7000 | CSC, Inc. | | Oil Operator | Jan 2000 |