| 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 | Nea Cross Inc | Erie, PA 16508-2769 | Gas Operator | Dec 1991 |
| 3 | North John M | Valatie, NY 12184-5005 | Gas Operator | Dec 2014 |
| 4 | Northwest Natural Gas Co | Albion, PA 16401-9998 | Oil & Gas Operator | Dec 1990 |
| 5 | Nucomer Energy LLC | Erie, PA 16510 | Oil & Gas Operator | Sep 2025 |