| 1 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Jun 2025 |
| 2 | Cane Creek Energy, LLC | Charleston, WV 25314 | Oil & Gas Operator | Dec 2021 |
| 3 | Carnegie Production Co | Charleston, WV 25328 | Oil & Gas Operator | Dec 2017 |
| 4 | Chesapeake Appalachia LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Jul 2025 |
| 5 | Classic Oil & Gas Resources Inc | | Gas Operator | Dec 2008 |
| 6 | CNG Producing Company | New Orleans, LA 70112 | Oil & Gas Operator | Dec 2015 |
| 7 | Cody, Patricia H | | Oil & Gas Operator | Nov 2007 |
| 8 | Columbia Gas Transmission, LLC | Charleston, WV 25314 | Oil & Gas Operator | Dec 2021 |
| 9 | Columbia Natural Resources, LLC | Charleston, WV 23502 | Oil & Gas Operator | Dec 2021 |
| 10 | Core Appalachia Operating LLC | Charleston, WV 25362 | Oil & Gas Operator | Dec 2023 |
| 11 | Cotiga Development Company, Limited Partnership | Williamson, WV 25661-0000 | Oil & Gas Operator | Dec 2021 |