| 901 | Crawford Energy Operating Co | Houston, TX 77056 | Oil & Gas Operator | Aug 2008 |
| 902 | Crawford Energy, Incorporated | Houston, TX 77056 | Oil & Gas Operator | Mar 2008 |
| 903 | Crawford Hughes Operating Co. | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2025 |
| 904 | Crawford Oil Company | Iowa Park, TX 76367 | Oil & Gas Operator | Jul 2001 |
| 905 | Crawford, Linda | Alice, TX 78332 | Oil Operator | Apr 2025 |
| 906 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2025 |
| 907 | Crazy Horse Operating LLC | Austin, TX 78731 | Oil & Gas Operator | Apr 2025 |
| 908 | CRD Operating, LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Feb 2021 |
| 909 | Creager And Creager Production | Midland, TX 79708 | Oil & Gas Operator | Aug 2003 |
| 910 | Creamer, Donald R., Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2006 |
| 911 | Creative Oil & Gas Operating,LLC | Giddings, TX 78942 | Oil & Gas Operator | May 2024 |
| 912 | Creative Oil And Gas Op II, LLC | San Antonio, TX 78246 | Oil Operator | Apr 2025 |
| 913 | Crebbs Oil Company | Batson, TX 77519 | Oil & Gas Operator | Jun 2024 |
| 914 | Credo Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | Jan 2013 |
| 915 | Creed Operating Co., LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2025 |
| 916 | Creek Energy, Inc. | Brownwood, TX 76804 | Oil & Gas Operator | Apr 2025 |
| 917 | Creek Operating Company, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Sep 1998 |
| 918 | Crego Exploration | Dallas, TX 75243 | Oil & Gas Operator | Apr 2025 |
| 919 | Cremson Oil & Gas | Coleman, TX 76834 | Oil & Gas Operator | Apr 2025 |
| 920 | Crenshaw Oil | Wichita Falls, TX 76302 | Oil & Gas Operator | Apr 2025 |
| 921 | Crenshaw, Joe R. | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2003 |
| 922 | Crenshaw, K. M. | Wichita Falls, TX 76308 | Oil & Gas Operator | Aug 2018 |
| 923 | Crescendo Resources, L.P. | Amarillo, TX 79188 | Oil & Gas Operator | Jan 2025 |
| 924 | Crescent Exploration Company | Austin, TX 78767 | Oil & Gas Operator | Aug 1995 |
| 925 | Crescent Exploration, LLC | Edmond, OK 73013 | Oil & Gas Operator | Mar 2015 |
| 926 | Crescent Pass Energy, LLC | Houston, TX 77070 | Oil & Gas Operator | Apr 2025 |
| 927 | Crest Operating Company | Houston, TX 77042 | Oil & Gas Operator | Apr 2025 |
| 928 | Crest Petroleum, LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2025 |
| 929 | Crest Resources & Expl. Corp. | Houston, TX 77079 | Oil & Gas Operator | Dec 1998 |
| 930 | Crest Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2025 |
| 931 | Crestmont Operating LLC | New York, NY 10151 | Oil Operator | Apr 2025 |
| 932 | Creston Petroleum Corp. | Dallas, TX 75380 | Oil & Gas Operator | Apr 2025 |
| 933 | Crestridge DRLG. & Prod.Co.,LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2023 |
| 934 | Creswell, Chris | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 935 | Creswell, R.G. | Graham, TX 76450 | Oil & Gas Operator | Feb 2013 |
| 936 | Crey Oil & Gas LLC | Sundown, TX 79372 | Oil Operator | Apr 2025 |
| 937 | Crimson Energy Company, LC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2004 |
| 938 | Crimson Energy Partners IV, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2023 |
| 939 | Crimson Energy Partners V, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 940 | Crimson Energy Partners, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2009 |
| 941 | Crimson Energy PTNRS III, L.L.C. | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2023 |
| 942 | Crimson Exploration Inc. | Houston, TX 77060 | Oil & Gas Operator | Apr 2006 |
| 943 | Crimson Exploration Oper., Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 944 | Criterion Energy, Limited | Austin, TX 78737 | Gas Operator | Jan 2003 |
| 945 | CRJ Bond Operations, LLC | Graham, TX 76450 | Oil Operator | Apr 2025 |
| 946 | CRM Energy, Inc. | Oklahoma City, OK 73101 | Oil & Gas Operator | Apr 2025 |
| 947 | Crocker Oil Company | Windthorst, TX 76389 | Oil & Gas Operator | Aug 1999 |
| 948 | Crockett Operating, LLC | Arlington, TX 76017 | Oil & Gas Operator | Apr 2025 |
| 949 | Crockett Operting, LLC | Arlington, TX 76013 | Oil & Gas Operator | Oct 2020 |
| 950 | Croft Petroleum Co. | Cut Bank, MT 59427 | Oil & Gas Operator | Dec 2022 |
| 951 | Croker, Danny | Wichita Falls, TX 76302 | Oil & Gas Operator | Apr 2025 |
| 952 | Cromeens Petroleum, Inc. | Mineral Wells, TX 76067 | Oil & Gas Operator | Sep 1996 |
| 953 | Crone Oil Company | Gruver, TX 79040 | Oil & Gas Operator | Apr 2025 |
| 954 | Cross Creek Energy LLC | Houston, TX 77074 | Oil & Gas Operator | Aug 2013 |
| 955 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 956 | Cross Timbers Oil Company | Dallas, TX 75284 | Oil & Gas Operator | May 2013 |
| 957 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2024 |
| 958 | Cross Winds Oil & Gas, LLC | Gruver, TX 79040 | Gas Operator | Apr 2025 |
| 959 | Crossbow Resources, LLC | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 960 | Crossfoot Operating, LLC | Houston, TX 77227 | Oil & Gas Operator | Apr 2025 |
| 961 | Crossing Rocks Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2018 |
| 962 | Crossland Oil & Gas | Dallas, TX 75205 | Oil & Gas Operator | Aug 1994 |
| 963 | Crosspoint Energy Company | Dallas, TX 75205 | Oil & Gas Operator | Oct 2007 |
| 964 | Crossroads Energy L.P. | Houston, TX 77064 | Oil & Gas Operator | Jun 2011 |
| 965 | Crossroads Energy Partners, LLC | Houston, TX 77070 | Oil & Gas Operator | Mar 2018 |
| 966 | Crossroads Mineral Prod., L.L.C. | Seguin, TX 78155 | Oil Operator | Apr 2025 |
| 967 | Crossroads Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 968 | Crossroads Petroleum L.L.C. | San Benito, TX 78586 | Oil & Gas Operator | Apr 2025 |
| 969 | Crossroads Vacuum & Weld. Serv. | Luling, TX 78648 | Oil Operator | Mar 2010 |
| 970 | Crosstex Services, L.L.C. | Tuscola, TX 79562 | Oil Operator | Apr 2025 |
| 971 | Crouch Petroleum Company | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2015 |
| 972 | Crouch, Eugene Louis | Lockhart, TX 78644 | Oil & Gas Operator | Apr 1999 |
| 973 | Crow Creek Operating Co II LLC | Houston, TX 77252 | Oil & Gas Operator | Jul 2011 |
| 974 | Crow, David | Shreveport, LA 71106 | Oil & Gas Operator | May 2001 |
| 975 | Crown Energy Company | Oklahoma City, OK 73106 | Oil & Gas Operator | Jan 2025 |
| 976 | Crown Equipment Co. | Weatherford, TX 76086 | Oil & Gas Operator | Apr 2025 |
| 977 | Crown Petroleum Corp. | Oklahoma City, OK 73106 | Oil & Gas Operator | Apr 2025 |
| 978 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2025 |
| 979 | Crozier & Company | Tyler, TX 75703 | Oil & Gas Operator | Jan 2020 |
| 980 | CRT'S, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Aug 2008 |
| 981 | Crude Operators, L.L.C. | Pampa, TX 79066 | Oil & Gas Operator | Apr 2025 |
| 982 | Crude Production Company | Clyde, TX 79510 | Oil & Gas Operator | Apr 2025 |
| 983 | Crude Resources, Inc. | Carrollton, TX 75011 | Oil & Gas Operator | Mar 2008 |
| 984 | Crump Operating | Henrietta, TX 76365 | Oil & Gas Operator | Apr 2025 |
| 985 | Crusader Energy Group Inc. | Austin, TX 78746 | Oil & Gas Operator | Mar 2015 |
| 986 | Crusader Energy Group, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2015 |
| 987 | Crusader Energy II, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 988 | Crusader Resources LC | Sugar Land, TX 77479 | Oil Operator | Apr 2025 |
| 989 | Crutcher Oil Properties | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2025 |
| 990 | Cruthird, Mark Oil | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2025 |
| 991 | Crystal Oil Company | Shreveport, LA 71120 | Oil & Gas Operator | Jul 1995 |
| 992 | Crystal River Oil & Gas LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Jan 2023 |
| 993 | Csa Exploration Company, Inc. | Houston, TX 77027 | Oil & Gas Operator | Aug 2003 |
| 994 | CSL Exploration, LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2018 |
| 995 | Cso Consulting | Bridgeport, TX 76426 | Oil & Gas Operator | Mar 2020 |
| 996 | CT Adams Jr., LLC | Schulenburg, TX 78956 | Oil Operator | Apr 2025 |
| 997 | CTC Oil Co., Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 998 | CTL Oil & Gas Corporation | Buchanan Dam, TX 78609 | Oil & Gas Operator | Nov 2020 |
| 999 | CTL Production, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2025 |
| 1000 | CTR Petroleum, Inc. | Corpus Chrsti, TX 78414 | Oil & Gas Operator | Mar 2015 |