| 1 | C & T Energy Of East Canton Inc | East Canton, OH 44730 | Oil & Gas Operator | Dec 2023 |
| 2 | C T R Resources Inc | Alliance, OH 44601 | Oil & Gas Operator | Dec 2013 |
| 3 | Carless Resources, Inc. | Cambridge, OH 43725 | Oil & Gas Operator | Dec 1997 |
| 4 | Cascade Petroleum Inc | North Canton, OH 44720-4244-4244 | Oil & Gas Operator | Dec 1992 |
| 5 | Cedar Valley Energy Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2021 |
| 6 | Cgas Exploration | Charleston, WV 25301 | Oil & Gas Operator | Dec 2006 |
| 7 | Chesapeake Appalachia LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2024 |
| 8 | Chesapeake Exploration LLC | Oklahoma City, OK 731540496 | Oil & Gas Operator | Jul 2020 |
| 9 | Chevron Appalachia, LLC | Corapolis, PA 15108 | Oil & Gas Operator | Jul 2020 |
| 10 | Clinton Gas Marketing Inc | Columbus, OH 43214 | Oil & Gas Operator | Dec 1988 |
| 11 | CNG Producing Company | New Orleans, LA 70112 | Oil & Gas Operator | Dec 2015 |
| 12 | Columbia Gas Transmission, LLC | Charleston, WV 25314 | Oil & Gas Operator | Dec 2021 |
| 13 | Consortium Energy LLC | North Canton, OH 44720 | Oil & Gas Operator | Dec 2023 |
| 14 | Cutter Exploration Inc | Oviedo, FL 32765-0476-0476 | Oil & Gas Operator | Dec 2022 |