| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Eagle Line Corp | Oil Operator | Dec 2015 | |
| 2 | East Resources MGMT LLC | Oil & Gas Operator | Dec 2010 | |
| 3 | East Resources, Inc. | Sewickley, PA 15143 | Oil & Gas Operator | Dec 2021 |
| 4 | Elder Oil & Gas Co | Parker, PA 16049-6426 | Oil & Gas Operator | Dec 2025 |
| 5 | Energy Resources Of Amer Inc | Columbiana, OH 44408 | Oil & Gas Operator | Dec 2021 |
| 6 | Enervest Opr LLC | Charleston, WV 25301-1782 | Oil & Gas Operator | Dec 2019 |
| 7 | Eqt Chap, LLC | Canonsburg, PA 15317-1000 | Oil & Gas Operator | Mar 2026 |
| 8 | Exco Resources Pa Inc | Warrendale, PA 15086-6501 | Oil & Gas Operator | Dec 2011 |
| 9 | Exley Oil & Gas Corp | Lemont, PA 16851-0425 | Oil & Gas Operator | Dec 2019 |