| 1 | East Resources, Inc. | Sewickley, PA 15143 | Oil & Gas Operator | Dec 2021 |
| 2 | Eastern American Energy Corp | | Oil & Gas Operator | Dec 2008 |
| 3 | Eastern Gas Transmission And Storage, Inc | | Oil & Gas Operator | Dec 2021 |
| 4 | Elder Oil Co. | West Union, WV 26456 | Oil & Gas Operator | Dec 2021 |
| 5 | Emax Oil Company | Charlottesville, VA 22903-4973 | Oil & Gas Operator | Dec 2016 |
| 6 | Empire Oil & Gas, Inc. | Harrisville, WV 26362 | Oil & Gas Operator | Dec 2021 |
| 7 | Energy Corporation Of America | Charleston, WV 25311 | Oil & Gas Operator | Dec 2023 |
| 8 | Energy Search Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2007 |
| 9 | Energy Unlimited Inc | | Oil & Gas Operator | Feb 2005 |
| 10 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 11 | Enervest Operating, L.L.C., A Limited Liability Company | | Oil & Gas Operator | Dec 2019 |
| 12 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 13 | Eqt Production Company | Pittsburg, PA 15222 | Oil & Gas Operator | Jul 2025 |
| 14 | Equitable Production Company | Charleston, WV 25302 | Oil & Gas Operator | Dec 2007 |
| 15 | Exco Resources (Pa), LLC | Dallas, TX 75251-2224 | Oil & Gas Operator | Jul 2025 |
| 16 | Exco Resources (WV), Inc. | | Oil & Gas Operator | Dec 2020 |