| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | E & B Natural Resources Management Corporation | Hays, KS 67601 | Oil & Gas Operator | Aug 2025 |
| 2 | E O R Petroleum | Oil Operator | Oct 1987 | |
| 3 | Eads Operating C | Oil Operator | Jun 1990 | |
| 4 | Eby Oil Co. | Oil Operator | Sep 2017 | |
| 5 | Entransco Energy LLC | Dewey, OK 74029 | Oil & Gas Operator | Oct 2024 |
| 6 | Equinox Oil Comp | Oil Operator | Dec 1996 | |
| 7 | Erbe, Dwayne E. (Estate) | Neodesha, KS 66757 | Oil Operator | Apr 2025 |
| 8 | Exodus Gas & Oil LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2024 |