| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Edward Oil Company | Youngsville, PA 16371 | Oil & Gas Operator | May 2024 |
| 2 | El Tres Petr. Corp. | Oil & Gas Operator | Jan 1984 | |
| 3 | Empire Land Corporation | New Orleans, LA 70130 | Oil & Gas Operator | Nov 2014 |
| 4 | Energy Reserves Group | Houston, TX 770563020 | Oil & Gas Operator | Apr 1996 |
| 5 | Energy RSRVS GRP-Lavino-Traver | Oil & Gas Operator | Aug 1985 | |
| 6 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 7 | Enstar Petroleum Company | Oil & Gas Operator | Jul 1985 | |
| 8 | Enstar Petroleum Inc | Oil & Gas Operator | Apr 1985 | |
| 9 | Equitable Petroleum Corp. | Oil & Gas Operator | Jan 1999 | |
| 10 | Evangeline Natural Resources, LLC | Oil & Gas Operator | Jun 2024 | |
| 11 | Expert Oil & Gas, L.L.C. | Oil & Gas Operator | May 2024 | |
| 12 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Nov 2024 |
| 13 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 14 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Nov 2024 |