| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Eagle Petroleum, Inc. | Ellinwood, KS 67526 | Oil Operator | Feb 2026 |
| 2 | Eagle River Energy Corporation | Broken Arrow, OK 74011 | Oil & Gas Operator | Feb 2026 |
| 3 | Edison Operating Company LLC | Wichita, KS 67226 | Oil & Gas Operator | Feb 2026 |
| 4 | Ellsworth Systems, Inc. | Wichita, KS 67202 | Oil & Gas Operator | May 2005 |