| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Easom, Dave Production Co Inc | Oil & Gas Operator | Nov 1998 | |
| 2 | Echols & Assoc. | Oil Operator | Apr 1986 | |
| 3 | El Toro Oil Co. & Flagg Resc. | Oil & Gas Operator | May 1993 | |
| 4 | El Toro Production Co., Inc. | Oil & Gas Operator | Jan 2016 | |
| 5 | Eor, LLC | Oil & Gas Operator | Nov 2013 | |
| 6 | Estate Of William G. Helis | Oil & Gas Operator | May 1994 | |
| 7 | Ethyl Properties Inc. | Oil & Gas Operator | Aug 1989 | |
| 8 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Jun 2025 |