| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Dec 2024 |
| 2 | Eberspecher Drilling Inc | Casper, WY 82601 | Oil & Gas Operator | Dec 2000 |
| 3 | Eblen Frank Syndicate Inc | Atlantic, IA 50022 | Oil & Gas Operator | Jul 2014 |
| 4 | Emc Energy | Oil & Gas Operator | Jun 1985 | |
| 5 | Encana Energy Resources Inc | Denver, CO 80202-2828 | Oil & Gas Operator | Feb 2024 |
| 6 | Energetics Inc | Englewood, CO 80155 | Oil & Gas Operator | Aug 1985 |
| 7 | Energy Production Co | Pittsburgh, PA 15241-3949 | Oil & Gas Operator | Dec 1994 |
| 8 | Enstar Petroleum Inc | Oil & Gas Operator | Apr 1985 | |
| 9 | Envirosearch Corporation | Oil Operator | Dec 1992 | |
| 10 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2024 |
| 11 | Equitable Resources Energy Company | Big Stone Gap, VA 24219 | Oil & Gas Operator | Dec 1997 |
| 12 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Dec 2024 |