| 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 | NCL Natural Resources LLC | Spring, TX 77381-5261 | Oil & Gas Operator | Dec 2017 |
| 3 | North Fork Oil & Gas Inc | Brookville, PA 15825-7976 | Gas Operator | Dec 2005 |
| 4 | Northwestern Inc | East Brady, PA 16028 | Gas Operator | Dec 2012 |