| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | C & R Petroleum Company | Duncan, OK 73533-1341 | Oil & Gas Operator | Oct 2025 |
| 2 | Carlon Oil & Gas Co Inc | Derby, KS 67037 | Gas Operator | Dec 2025 |
| 3 | Casillas Petroleum Corp | Satanta, KS 67870 | Oil & Gas Operator | Dec 2025 |
| 4 | Chesapeake Energy | Oil & Gas Operator | Dec 2009 | |
| 5 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2026 |
| 6 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Feb 2026 |
| 7 | Cisco Operating LLC | Plano, TX 75024 | Oil & Gas Operator | Dec 2025 |
| 8 | Cycle Oil & Gas LTD | Gas Operator | Sep 2025 |