| 1 | Eagle Mountain Energy | Columbus, OH 43214-981-981 | Oil & Gas Operator | Dec 2002 |
| 2 | Eastern Amer Energy Corp | Charleston, WV 25304 | Oil & Gas Operator | Dec 2006 |
| 3 | Eastern Petroleum Company | Girard, OH 44420 | Oil & Gas Operator | Sep 1995 |
| 4 | Eclipse Resources-Ohio LLC | Morgantown, WV 26508 | Oil & Gas Operator | Dec 2020 |
| 5 | Edco Drilling & Producing | MT Gilead, OH 43338 | Oil & Gas Operator | Dec 2006 |
| 6 | Elba Oil Company LLC | Macksburg, OH 45746 | Oil Operator | Dec 2023 |
| 7 | Elk Oil Co LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2018 |
| 8 | Em Energy Ohio LLC | Canonsburg, PA 15317 | Oil & Gas Operator | Sep 2019 |
| 9 | Energy Contractors, Inc. | Canal Wincheste, OH 43110 | Oil & Gas Operator | Dec 2019 |
| 10 | Energy Distributors Inc | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1987 |
| 11 | Energy Search Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2007 |
| 12 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 13 | Enterprise Energy Corp | Cambridge, OH 43725 | Oil & Gas Operator | Dec 1985 |
| 14 | Envirogas Inc | Hamburg, NY 14075 | Oil & Gas Operator | Dec 1992 |
| 15 | Equity Oil & Gas Funds Inc | Orlando, FL 32837-6103-6103 | Oil & Gas Operator | Dec 2023 |
| 16 | Exco - North Coast Energy Inc | Kittanning, PA 16201 | Oil & Gas Operator | Dec 2018 |
| 17 | Explore Energy Corp. | Westerville, OH 43086 | Oil & Gas Operator | Dec 2016 |