| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Eads Operating C | Oil Operator | Jun 1990 | |
| 2 | Edison Operating Company LLC | Wichita, KS 67226 | Oil & Gas Operator | Jan 2024 |
| 3 | El Paso E&P Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2013 |
| 4 | Elm III Operating Company LLC | Edmond, OK 73013 | Oil & Gas Operator | Jan 2024 |
| 5 | Energy Sources I | Oil & Gas Operator | Jul 1986 | |
| 6 | Enron Corporatio | Oil & Gas Operator | Aug 1999 | |
| 7 | Ensign Operating | Oil & Gas Operator | Oct 1994 | |
| 8 | Ensz, Jerry | Sublette, KS 67877 | Gas Operator | Jan 2024 |
| 9 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | May 2024 |
| 10 | Extreme Energy Co | Oil & Gas Operator | Jan 2024 | |
| 11 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 2023 |
| 12 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Mar 2024 |