| 1 | C & J Well No 1 And C & J Well No 2 | Philippi, WV 26416 | Gas Operator | Dec 2021 |
| 2 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Jan 2024 |
| 3 | CDX Gas, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Oct 2009 |
| 4 | Century Mining, LLC | | Gas Operator | Dec 2021 |
| 5 | Charity Gas, Inc. | Salem, WV 26426-5554 | Oil & Gas Operator | Dec 2021 |
| 6 | Chesapeake Appalachia LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2024 |
| 7 | Clem Energy LLC | | Oil & Gas Operator | Dec 2021 |
| 8 | Clowser Well Service, Inc. | | Oil & Gas Operator | Dec 2021 |
| 9 | CNG Producing Company | New Orleans, LA 70112 | Oil & Gas Operator | Dec 2015 |
| 10 | CNX Gas Company LLC | Canonsburg, PA 15317 | Oil & Gas Operator | Feb 2024 |
| 11 | Columbia Natural Resources, LLC | Charleston, WV 23502 | Oil & Gas Operator | Dec 2021 |
| 12 | Commonwealth Energy, Inc. | Weston, WV 26452-0000 | Oil & Gas Operator | Dec 2021 |
| 13 | Consol Gas Company | Canonsburg, PA 15317 | Oil & Gas Operator | Dec 2021 |
| 14 | Continental Petroleum, LLC | | Oil & Gas Operator | Oct 2013 |
| 15 | Creston Oil Corporation | Jacksonville, FL 32225 | Oil & Gas Operator | Dec 2021 |