| 1 | C & L Oil And Gas Corporation | Norman, OK 73069-8224 | Oil & Gas Operator | Feb 2024 |
| 2 | C E D LC | Enid, OK 73702-0326 | Oil & Gas Operator | Oct 2021 |
| 3 | C F & L Producing Co | | Oil & Gas Operator | Sep 2000 |
| 4 | Calumet Oil Company | Oklahoma City, OK 73114 | Oil & Gas Operator | Feb 2019 |
| 5 | Canok International Inc | Beggs, OK 74421-0038 | Oil & Gas Operator | Jan 2024 |
| 6 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Mar 2024 |
| 7 | Capstone Oilfield Disposal Service LLC | Hennessey, OK 73742-0698 | Oil Operator | Dec 2019 |
| 8 | Capturepoint LLC | Allen, TX 75013 | Oil & Gas Operator | May 2024 |
| 9 | Cardinal River Operating LLC | | Oil & Gas Operator | Jan 2024 |
| 10 | Carey Gas Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Jun 1999 |
| 11 | Carl E Gungoll Exploration LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2024 |
| 12 | Case Sales Company Inc | Tonkawa, OK 74653-0040 | Oil & Gas Operator | Jan 2024 |
| 13 | Casey Musgrove Oil Company Inc | Ponca City, OK 74602 | Oil & Gas Operator | Feb 2024 |
| 14 | Casillas Operating LLC | | Oil & Gas Operator | Jan 2024 |
| 15 | Ceja Corporation | Tulsa, OK 74172 | Oil & Gas Operator | Jan 2024 |
| 16 | Central Ok Reclamation LLC | | Oil & Gas Operator | Jun 2014 |
| 17 | Centrex Operating Company | Tulsa, OK 74105 | Oil & Gas Operator | Jan 2024 |
| 18 | Challenge Operating Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
| 19 | Chermac Energy Corporation | Edmond, OK 73083-5446 | Oil & Gas Operator | Apr 2020 |
| 20 | Cherokee Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 21 | Chesapeake Operating, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2024 |
| 22 | Chica Oil Company | Lago VIsta, TX 78645-6561 | Oil & Gas Operator | Mar 2001 |
| 23 | Chizum Oil LLC | Wichita, KS 67211 | Oil & Gas Operator | Feb 2024 |
| 24 | Christie Jr C B | Wichita Falls, TX 76308-4873 | Oil & Gas Operator | Jun 2023 |
| 25 | Cirrus Production Company | Enid, OK 73702 | Oil & Gas Operator | Jan 2024 |
| 26 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | May 2024 |
| 27 | CLV Oil & Gas Inc | Tulsa, OK 74169-0713 | Oil & Gas Operator | Apr 2020 |
| 28 | Co-St Oil Operating Co Inc | Enid, OK 73706 | Oil & Gas Operator | Apr 1997 |
| 29 | Colpitt Brothers Oil | Collinsville, OK 74021-0028 | Oil & Gas Operator | Apr 2020 |
| 30 | Colpitt Brothers Operating Co | Collinsville, OK 74021-0028 | Oil & Gas Operator | Feb 2024 |
| 31 | Colt Resources Corporation | Billings, MT 59103 | Oil & Gas Operator | Feb 2013 |
| 32 | Concho Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2015 |
| 33 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 34 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | May 2024 |
| 35 | Contango Resources LLC | Houston, TX 77002 | Oil & Gas Operator | May 2024 |
| 36 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | May 2024 |
| 37 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 38 | Cooper Operating LLC | | Oil & Gas Operator | Jan 2024 |
| 39 | Cordillera Energy Partners LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |
| 40 | Coronado Petroleum Corporation | Oklahoma City, OK 73102-4803 | Oil & Gas Operator | Jan 2024 |
| 41 | Covington Oil Company Inc | Oklahoma City, OK 73154-1470 | Oil & Gas Operator | Feb 2024 |
| 42 | Cox Robert L | Blackwell, OK 74631 | Oil & Gas Operator | Dec 2023 |
| 43 | CPRC Inc | Tulsa, OK 74103-5037 | Oil & Gas Operator | Apr 1997 |
| 44 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2024 |
| 45 | Culp & Copple Oil Company | Cushing, OK 74023-1442 | Oil & Gas Operator | Apr 2022 |