| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | E & B Natural Resources Management Corporation | Hays, KS 67601 | Oil & Gas Operator | Mar 2025 |
| 2 | E & T Limited Liability Co. | Oil & Gas Operator | Mar 2025 | |
| 3 | Ecology Auto Wrecking | Oil Operator | Dec 2005 | |
| 4 | El Segundo Oil LLC | Oil Operator | Mar 2025 | |
| 5 | Emil W. Plegel | Oil & Gas Operator | Mar 2025 | |
| 6 | Energy Production & Sales Co. | Oil & Gas Operator | Dec 1999 | |
| 7 | Eugene E. Marble | Oil Operator | Dec 1981 | |
| 8 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Jun 2025 |