| 1001 | Capataz Operating Inc | Midland, TX 79702 | Oil & Gas Operator | Sep 2020 |
| 1002 | Cape Oil Associates | | Oil & Gas Operator | Sep 1997 |
| 1003 | Capital Pet & Investments Inc | Oklahoma City, OK 73102-7400 | Oil & Gas Operator | Mar 2015 |
| 1004 | Capital Programs Company Inc | Addison, TX 75001-6030 | Oil Operator | Jul 2021 |
| 1005 | Capitol Well Servicing Co., Inc. | Oklahoma City, OK 73143 | Oil & Gas Operator | May 2023 |
| 1006 | Capmac Inc | Tulsa, OK 74105-7119 | Oil & Gas Operator | Jan 2007 |
| 1007 | Caprock, Inc. | Ralls, TX 79357 | Oil & Gas Operator | Mar 2013 |
| 1008 | Capstone Oil & Gas LLC | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2025 |
| 1009 | Capstone Oilfield Disposal Service LLC | Hennessey, OK 73742 | Oil Operator | Dec 2019 |
| 1010 | Capturepoint LLC | Allen, TX 75013 | Oil & Gas Operator | Apr 2025 |
| 1011 | Carbon Economy LLC | Chickasha, OK 73023 | Oil & Gas Operator | Feb 2025 |
| 1012 | Carbon Ridge Energy LLC | Norman, OK 73069 | Oil & Gas Operator | Feb 2025 |
| 1013 | Cardinal Oil LLC | Drumright, OK 74030-5820 | Oil & Gas Operator | Jan 2025 |
| 1014 | Cardinal River Operating LLC | Oklahoma City, OK 73102-7109 | Oil & Gas Operator | Jan 2025 |
| 1015 | Carey Gas Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Jun 1999 |
| 1016 | Carl E Gungoll Exploration Inc | Oklahoma City, OK 73154-0466 | Oil & Gas Operator | Jan 2016 |
| 1017 | Carl E Gungoll Exploration LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2025 |
| 1018 | Carl Humphries Inc | Piedmont, OK 73078-0514 | Oil & Gas Operator | Feb 2025 |
| 1019 | Carla Energy Corporation | Oklahoma City, OK 73154-1487 | Oil & Gas Operator | Nov 2014 |
| 1020 | Carlin Oil And Gas Company | Tulsa, OK 74101-1019 | Oil & Gas Operator | May 1992 |
| 1021 | Carlow Corp. | Midland, TX 79702 | Oil & Gas Operator | Jan 2025 |
| 1022 | Carlson Petroleum Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 1023 | Carlton, Richard L | | Oil & Gas Operator | Aug 1999 |
| 1024 | Carmac Energy Company LLC | Seminole, OK 74868 | Oil Operator | Jan 2025 |
| 1025 | Carmac Energy Corporation | Dallas, TX 75219-2311 | Oil & Gas Operator | Jan 2025 |
| 1026 | Carman C Wilford | | Oil & Gas Operator | Jan 2007 |
| 1027 | Carman Frances J | Pawhuska, OK 74056-0101 | Oil & Gas Operator | Aug 2013 |
| 1028 | Carman Robert W | Bristow, OK 74010-3454 | Oil & Gas Operator | Jan 2025 |
| 1029 | Carmen Field LP | Tulsa, OK 74135 | Oil & Gas Operator | Mar 2008 |
| 1030 | Carmichael Oil & Gas Company | Vallejo, CA 94591-5653 | Oil & Gas Operator | Apr 2014 |
| 1031 | Carnes Crude Oil Reclaiming Industry | | Oil Operator | Dec 2019 |
| 1032 | Carnes Petroleum Corporation | Cleveland, OK 74020 | Oil & Gas Operator | May 2020 |
| 1033 | Carney A B | | Oil & Gas Operator | Jan 2014 |
| 1034 | Carney Mark C & Karen M | Dallas, TX 75206-4010 | Oil & Gas Operator | Oct 1994 |
| 1035 | Carpenter Luther | Skiatook, OK 74070-9124 | Oil & Gas Operator | Dec 2024 |
| 1036 | Carpenter R L | Sapulpa, OK 74067-0452 | Oil Operator | Mar 2007 |
| 1037 | Carr Exploration Corp. | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 1038 | Carrera Energy LLC | Midland, TX 79704-5036 | Oil & Gas Operator | Jan 2025 |
| 1039 | Carroll M R Dba Carroll Production Company | Sapulpa, OK 74066-6132 | Oil & Gas Operator | Feb 2025 |
| 1040 | Carruth David C Family Trust | Russellville, AR 72811-2061 | Oil Operator | Aug 2002 |
| 1041 | Carter County Salt Water Disposal Inc | Wilson, OK 73463 | Oil Operator | Jan 2025 |
| 1042 | Carter Donald L | Sand Springs, OK 74063-8105 | Oil Operator | May 2006 |
| 1043 | Carter E W Oil Co Inc | Hominy, OK 74035 | Oil & Gas Operator | Jan 2025 |
| 1044 | Carter Mammons | Pawhuska, OK 74056 | Oil Operator | Jan 2021 |
| 1045 | Carter Preston Drilling Co | Davis, OK 73030 | Gas Operator | Nov 2000 |
| 1046 | Cartledge & Cartledge Oil Company Inc | Kiefer, OK 74041 | Oil & Gas Operator | Feb 2025 |
| 1047 | Cartledge Energy LLC | Sapulpa, OK 74066-6623 | Oil & Gas Operator | Jan 2025 |
| 1048 | Carver Harry | Oklahoma City, OK 73120 | Oil & Gas Operator | Nov 2000 |
| 1049 | Casa Grande Exploration Company | Casa Grande, AZ 85194 | Oil & Gas Operator | Jan 2025 |
| 1050 | Case Sales Company Inc | Tonkawa, OK 74653-0040 | Oil & Gas Operator | Jan 2025 |
| 1051 | Casey David | Hennepin, OK 73046 | Oil Operator | Sep 2024 |
| 1052 | Casey Musgrove Oil Company Inc | Ponca City, OK 74602 | Oil & Gas Operator | Jan 2025 |
| 1053 | Casillas Operating LLC | Tulsa, OK 74103-4060 | Oil & Gas Operator | Jan 2025 |
| 1054 | Casillas Petroleum Corp | Satanta, KS 67870 | Oil & Gas Operator | Feb 2025 |
| 1055 | Cason William J | Santee, CA 92071-2765 | Oil Operator | Sep 2019 |
| 1056 | Caspen Oil, Inc. | Denver, CO 80226 | Oil & Gas Operator | Jul 1993 |
| 1057 | Casselman Charles Jack | Okmulgee, OK 74447-4265 | Oil & Gas Operator | Apr 2020 |
| 1058 | Casselman Leases LLC | Morris, OK 74445-2509 | Oil & Gas Operator | Jan 2025 |
| 1059 | Casselman Ronald H | Morris, OK 74445 | Oil & Gas Operator | Jan 2025 |
| 1060 | Casselman-Sheely | Emporia, KS 66801 | Oil & Gas Operator | Oct 2021 |
| 1061 | Cassidy Jr John | Stroud, OK 74079-0200 | Oil & Gas Operator | Nov 2014 |
| 1062 | Castella Inc | Bartlesville, OK 74003-3712 | Oil & Gas Operator | Feb 2025 |
| 1063 | Castelli Exploration, Inc. | Oklahoma City, OK 73162 | Oil & Gas Operator | Jan 2025 |
| 1064 | Castle Exploration Company Inc | Blue Bell, PA 19422 | Oil & Gas Operator | May 2018 |
| 1065 | Castle Operating LLC | Oklahoma City, OK 73114-7444 | Oil & Gas Operator | Jan 2025 |
| 1066 | Castlerock Resources Inc | Oklahoma City, OK 73116-3710 | Oil & Gas Operator | Jul 2020 |
| 1067 | Cates Betty J | Tulsa, OK 74112 | Oil & Gas Operator | Nov 2016 |
| 1068 | Cathey Production Company | Ryan, OK 73565-0485 | Oil Operator | Dec 2010 |
| 1069 | Caulkins Oil Company | Aztec, NM 87410 | Oil & Gas Operator | Oct 2024 |
| 1070 | Cayman Exploration Corp. | Tulsa, OK 74119-1323 | Oil & Gas Operator | Jun 2001 |
| 1071 | Cayman Resources Corporation | Tulsa, OK 74119-1323 | Oil & Gas Operator | Jun 2001 |
| 1072 | CB Oil Company | Drumright, OK 74030 | Oil & Gas Operator | Jan 2025 |
| 1073 | CBL Resources LLC | Tulsa, OK 74136-6308 | Oil & Gas Operator | Jan 2025 |
| 1074 | CBM Gas Company LLC | Dewey, OK 74029 | Oil & Gas Operator | Aug 2020 |
| 1075 | Cbo Oil And Gas LLC | Stillwater, OK 74075-8793 | Oil Operator | Jan 2025 |
| 1076 | CBS Energy LLC | Oklahoma City, OK 73142-4437 | Oil & Gas Operator | Jan 2025 |
| 1077 | CCS Investments Inc | Bartlesville, OK 74006-1941 | Oil Operator | Jan 2025 |
| 1078 | CDG Inc | Sapulpa, OK 74066-6339 | Oil Operator | Oct 2020 |
| 1079 | CDS Oil Company | Tulsa, OK 74147-1514 | Oil & Gas Operator | Mar 2015 |
| 1080 | Cedar Oil Company | Midland, TX 79707 | Oil & Gas Operator | Apr 2025 |
| 1081 | Cei Operating LLC | Katy, TX 77449 | Oil & Gas Operator | Apr 2025 |
| 1082 | Cei Petroleum Inc | Tulsa, OK 74103-4141 | Oil & Gas Operator | Jul 2016 |
| 1083 | Ceja Corporation | Tulsa, OK 74172 | Oil & Gas Operator | Jan 2025 |
| 1084 | Celero Energy LP | Midland, TX 79701 | Oil & Gas Operator | May 2011 |
| 1085 | Cement Oil Company | Cement, OK 73017-9234 | Oil & Gas Operator | Feb 2025 |
| 1086 | Cemoil Inc | Cement, OK 73017-0563 | Oil & Gas Operator | Feb 2025 |
| 1087 | Cenergy Exploration Company | Dallas, TX 75231 | Oil & Gas Operator | Sep 2000 |
| 1088 | Cenpat Operating LLC | Houston, TX 77042-3044 | Oil & Gas Operator | Jan 2025 |
| 1089 | Centaur Resources Inc | Oklahoma City, OK 73142-6804 | Oil & Gas Operator | Jan 2025 |
| 1090 | Centennial Resources Inc | Drumright, OK 74030-1234 | Oil & Gas Operator | Dec 2007 |
| 1091 | Center Oil Company | Ada, OK 74821-0584 | Oil Operator | May 2003 |
| 1092 | Center Production Company LLC | Ada, OK 74820 | Oil Operator | Jan 2025 |
| 1093 | Central California Oil Co. | Fish Camp, CA 93623 | Oil & Gas Operator | Dec 2024 |
| 1094 | Central Crude Corp. | Wichita, KS 67206 | Oil Operator | Jan 2024 |
| 1095 | Central Ok Reclamation LLC | Lindsay, OK 73052 | Oil & Gas Operator | Jun 2014 |
| 1096 | Central Resources Inc | Denver, CO 80203 | Oil & Gas Operator | Dec 2019 |
| 1097 | Central Transmission Sys Co | Denver, CO 80202 | Oil & Gas Operator | Apr 2015 |
| 1098 | Centrex Operating Company | Tulsa, OK 74105 | Oil & Gas Operator | Jan 2025 |
| 1099 | Centurion Oil Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | May 1992 |
| 1100 | Centurion Resources LLC | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |