| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Eagle Creek Corporation | Andover, KS 67002 | Oil & Gas Operator | Feb 2026 |
| 2 | Edinger Incorpor | Oil Operator | Oct 1986 | |
| 3 | Elk Energy Holdings LLC | Wichita, KS 67226 | Oil & Gas Operator | Feb 2026 |
| 4 | Elm III Operating Company LLC | Edmond, OK 73013 | Oil & Gas Operator | Feb 2026 |
| 5 | Encore Operating Company | Denver, CO 80227 | Oil & Gas Operator | Dec 2019 |
| 6 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 7 | Enmark Gas Gathering LP | Dallas, TX 75252 | Oil & Gas Operator | Dec 2025 |
| 8 | Evolution Oil & | Oil & Gas Operator | Apr 1993 |