| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | E & E Oil | Oil Operator | Dec 2019 | |
| 2 | E&E Oil LLC | Canton, KS 67428 | Oil Operator | Feb 2025 |
| 3 | Eagle Energy | Midland, TX 79710 | Oil & Gas Operator | Aug 1994 |
| 4 | Eagle Resources | Oil & Gas Operator | Mar 1987 | |
| 5 | Ecco | Oil Operator | Feb 2025 | |
| 6 | Edison Operating Company LLC | Wichita, KS 67226 | Oil & Gas Operator | Feb 2025 |
| 7 | Edwards Oil Properties | Oil Operator | Dec 2009 | |
| 8 | Empire Energy E & P LLC | Mayville, NY 14757 | Oil & Gas Operator | Dec 2024 |
| 9 | Energy Sources I | Oil & Gas Operator | Jul 1986 | |
| 10 | Evans Oil D W - | Oil Operator | Mar 1992 | |
| 11 | Excalibur Prod C | Oil & Gas Operator | Jun 1995 | |
| 12 | Excalibur Production Company, Inc. | McPherson, KS 67460 | Oil & Gas Operator | Feb 2025 |
| 13 | Excel Oil & Gas L.L.C. | Bucyrus, KS 66013 | Oil Operator | Feb 2025 |