| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Natl Fuel Gas Supply Corp | Williamsville, NY 14221-5887 | Oil & Gas Operator | Dec 2009 |
| 2 | North Penn Gas Co | Allentown, PA 18101-1139 | Gas Operator | Dec 2000 |
| 3 | Northeast Natural Energy LLC | Charleston, WV 25301-2719 | Oil & Gas Operator | Aug 2025 |
| 4 | Northwestern Inc | East Brady, PA 16028 | Gas Operator | Dec 2012 |