| 1 | C & L Oil And Gas Corporation | Norman, OK 73069-8224 | Oil & Gas Operator | Feb 2024 |
| 2 | C & S Exploration Inc | | Oil & Gas Operator | Jun 2016 |
| 3 | Capstone Oilfield Disposal Service LLC | Hennessey, OK 73742-0698 | Oil Operator | Dec 2019 |
| 4 | Central Ok Reclamation LLC | | Oil & Gas Operator | Jun 2014 |
| 5 | Chesapeake Energy MKT Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2022 |
| 6 | Chesapeake Operating, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2024 |
| 7 | Cima Energy LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2022 |
| 8 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | May 2024 |
| 9 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | May 2024 |
| 10 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 11 | Crest Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | May 2024 |
| 12 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2024 |
| 13 | CX Disposals LLC | | Oil Operator | Oct 2023 |