| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Cameron Energy Co | Sheffield, PA 16347-2642 | Oil & Gas Operator | Dec 2023 |
| 2 | Capital Oil & Gas Inc | Austintown, OH 44515-3033 | Oil & Gas Operator | Dec 2023 |
| 3 | Castle Gas Company Inc | Pittsburgh, PA 15236-2466 | Oil & Gas Operator | Dec 2007 |
| 4 | Catalyst Energy Inc | Pittsburgh, PA 15218 | Oil & Gas Operator | Jan 2024 |
| 5 | Cedar Valley Energy Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2021 |
| 6 | CNG Development Co | Oil & Gas Operator | Dec 2008 | |
| 7 | CNX Gas Company LLC | Canonsburg, PA 15317 | Oil & Gas Operator | Jan 2024 |
| 8 | Columbia Natural Res Inc | Charleston, WV 25362-0070 | Gas Operator | Dec 2008 |
| 9 | Consol Gas Company | Canonsburg, PA 15317 | Oil & Gas Operator | Dec 2021 |
| 10 | Coterra Energy Inc | Pittsburgh, PA 15275-1121 | Oil & Gas Operator | Jan 2024 |