| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Elson Oil Company | Tulsa, OK 74103-4429 | Oil & Gas Operator | Dec 2016 |
| 2 | Enhanced Energy Partners Corp | Tomball, TX 77377 | Oil & Gas Operator | Oct 2025 |
| 3 | Escondido Petroleum Company, Inc | Houston, TX 77063 | Oil & Gas Operator | Oct 2025 |
| 4 | Evergreen Energy, Inc | Houston, TX 77098 | Oil & Gas Operator | Oct 2025 |
| 5 | Express Oil Co. | Hallettsville, TX 77964 | Oil & Gas Operator | Oct 2025 |
| 6 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 7 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Oct 2025 |