| 1 | C & B Production | Ben Bolt, TX 78342 | Oil & Gas Operator | Dec 2025 |
| 2 | C & C Oil Co. | Borger, TX 79008 | Oil & Gas Operator | Aug 2025 |
| 3 | C & T Energy Co | Bartlesville, OK 74006 | Oil & Gas Operator | Nov 2004 |
| 4 | C E Harmon Oil Inc | Tulsa, OK 74136-6559 | Oil & Gas Operator | Sep 2025 |
| 5 | C N Operating Co | Drumright, OK 74030 | Oil & Gas Operator | Nov 1998 |
| 6 | C5 Energy LLC | Collinsville, OK 74021 | Oil & Gas Operator | Dec 2019 |
| 7 | Cable W S | Cleveland, OK 74020 | Oil Operator | Jan 2021 |
| 8 | Cabot Exploration Corp | Houston, TX 77070 | Oil Operator | Jun 1999 |
| 9 | Calgary Energy LLC | Collinsville, OK 74021 | Oil & Gas Operator | Aug 2025 |
| 10 | Calumet Oil Company | Oklahoma City, OK 73114 | Oil & Gas Operator | Feb 2019 |
| 11 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Sep 2025 |
| 12 | Cape Oil Associates | | Oil & Gas Operator | Sep 1997 |
| 13 | Capital Programs Company Inc | Addison, TX 75001-6030 | Oil Operator | Jul 2021 |
| 14 | Capturepoint LLC | Allen, TX 75013 | Oil & Gas Operator | Dec 2025 |
| 15 | Cardinal River Operating LLC | Oklahoma City, OK 73102-7109 | Oil & Gas Operator | Aug 2025 |
| 16 | Carman C Wilford | | Oil & Gas Operator | Jan 2007 |
| 17 | Carman Frances J | Pawhuska, OK 74056-0101 | Oil & Gas Operator | Aug 2013 |
| 18 | Carman Robert W | Bristow, OK 74010-3454 | Oil & Gas Operator | Aug 2025 |
| 19 | Carnes Crude Oil Reclaiming Industry | | Oil Operator | Dec 2019 |
| 20 | Carpenter Luther | Skiatook, OK 74070-9124 | Oil & Gas Operator | Aug 2025 |
| 21 | Cartledge & Cartledge Oil Company Inc | Kiefer, OK 74041 | Oil & Gas Operator | Sep 2025 |
| 22 | Cartledge Energy LLC | Sapulpa, OK 74066-6623 | Oil & Gas Operator | Aug 2025 |
| 23 | Case Sales Company Inc | Tonkawa, OK 74653-0040 | Oil & Gas Operator | Aug 2025 |
| 24 | Casey, Carl D | | Oil Operator | Sep 2024 |
| 25 | Cassidy Jr John | Stroud, OK 74079-0200 | Oil & Gas Operator | Nov 2014 |
| 26 | Castella Inc | Bartlesville, OK 74003-3712 | Oil & Gas Operator | Sep 2025 |
| 27 | Ceja Corporation | Tulsa, OK 74172 | Oil & Gas Operator | Sep 2025 |
| 28 | Central California Oil Company | Fish Camp, CA 93623 | Oil & Gas Operator | Oct 2025 |
| 29 | Centurion Resources LLC | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 30 | Cep Mid-Continent LLC | Skiatook, OK 74070 | Oil & Gas Operator | Aug 2025 |
| 31 | Chambers & Hendrix Oil & Gas | Skiatook, OK 74070-0726 | Oil & Gas Operator | Aug 2022 |
| 32 | Chanse Energy Corporation | Shreveport, LA 71165-1572 | Oil & Gas Operator | Sep 2021 |
| 33 | Chermac Energy Corporation | Edmond, OK 73083 | Oil & Gas Operator | Apr 2020 |
| 34 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2025 |
| 35 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 36 | Chinn, Larry A | | Oil & Gas Operator | Aug 2025 |
| 37 | Chinn, Larry E | | Oil & Gas Operator | Aug 2025 |
| 38 | Chinn, Velma D | | Oil Operator | Mar 2015 |
| 39 | Christeve Oil Company, Inc. | Houston, TX 77068 | Oil & Gas Operator | Dec 2022 |
| 40 | Circle K Oil & Gas Inc | Sand Springs, OK 74063 | Oil & Gas Operator | Aug 2025 |
| 41 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | Dec 2025 |
| 42 | Clapp Carl O | Cedar Vale, KS 67024 | Oil Operator | Aug 2013 |
| 43 | Class Petroleum Corporation | Barnsdall, OK 74002 | Oil Operator | Aug 2013 |
| 44 | Clear Creek Royalty LLC | Tulsa, OK 74137 | Oil & Gas Operator | Jul 2023 |
| 45 | Clemishire Don | Hominy, OK 74035 | Oil & Gas Operator | Aug 2025 |
| 46 | Clemishire, Brian S | | Oil & Gas Operator | Nov 2014 |
| 47 | Clemishire, Jerry L | | Oil & Gas Operator | Aug 2025 |
| 48 | Clemishire, Mark E | | Oil Operator | Aug 2025 |
| 49 | Clemshire Bob | Hominy, OK 74035 | Oil & Gas Operator | Aug 2025 |
| 50 | Clemshire Drilling Company | Tulsa, OK 74105 | Oil Operator | Jun 2025 |
| 51 | Clifton & Associates Inc | Tulsa, OK 74133 | Oil & Gas Operator | May 2020 |
| 52 | Cmo LLC | Cleveland, OK 74020 | Oil & Gas Operator | Aug 2025 |
| 53 | CMS Energy Inc | Dallas, TX 75287 | Oil & Gas Operator | Aug 2025 |
| 54 | Coast David | Bartlesville, OK 74006-0407 | Oil & Gas Operator | Aug 2025 |
| 55 | Collins, Stephen M | | Oil Operator | Aug 2025 |
| 56 | Colonial Energy Company Inc | Garland, TN 75045 | Oil & Gas Operator | Apr 2015 |
| 57 | Colpitt C H Drilling Co LLC | Collinsville, OK 74021-7107 | Oil Operator | Aug 2025 |
| 58 | Colpitt Chas H Drilling Co | Collinsville, OK 74021-7105 | Oil & Gas Operator | Mar 2012 |
| 59 | Comanche Oil And Service, LLC | | Oil Operator | Aug 2025 |
| 60 | Condrin Oil 1985-A LTD | Tulsa, OK 74136 | Oil & Gas Operator | Nov 1998 |
| 61 | Conklin Robert L Dba Conklin Oil LLC | Tulsa, OK 74153 | Oil Operator | Aug 2025 |
| 62 | Conley, John | | Oil Operator | Aug 2000 |
| 63 | Conoco Inc | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 64 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 65 | Consolidated Oil & Gas Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2012 |
| 66 | Contango Resources LLC | Andrews, TX 79714 | Oil & Gas Operator | Dec 2025 |
| 67 | Continental Oil & Refining Co | Catoosa, OK 74015-0831 | Oil & Gas Operator | Nov 2024 |
| 68 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 69 | Cooper A L & Mae C | | Oil & Gas Operator | Jan 2001 |
| 70 | Cooper John T | Duncan, OK 73534 | Oil & Gas Operator | Sep 2014 |
| 71 | Cooper Oil Inc | Duncan, OK 73534 | Oil & Gas Operator | Sep 2014 |
| 72 | Corley G R | | Oil & Gas Operator | Jun 2009 |
| 73 | Cornelius, Steven L | | Oil Operator | Sep 2015 |
| 74 | Coronado Oklahoma LLC | Tulsa, OK 74133-7036 | Gas Operator | Apr 2020 |
| 75 | Coronado Petroleum Corporation | Oklahoma City, OK 73102-4803 | Oil & Gas Operator | Aug 2025 |
| 76 | Cougar Oil | | Oil Operator | Jul 2025 |
| 77 | Coughlin, Daniel L | | Oil Operator | Aug 2000 |
| 78 | Cox, Gary L | | Oil Operator | Mar 2022 |
| 79 | Craft & Craft Productions LLC | | Oil Operator | May 2025 |
| 80 | Crain & Deisenroth | Tulsa, OK 74103-4433 | Oil & Gas Operator | Mar 2015 |
| 81 | CRM Energy Partners | | Oil & Gas Operator | Aug 2025 |
| 82 | Cross Timbers Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2025 |
| 83 | Cross Timbers Production Co | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 2005 |
| 84 | Crude Oil Recovery Inc /Osage Only | | Oil & Gas Operator | Mar 2006 |
| 85 | Cruzen Drilling Company Inc | Cleveland, OK 74020-0470 | Oil Operator | Nov 2014 |