| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Elek Aaron III | Oil Operator | Jul 2005 | |
| 2 | Elek Aaron III Estate | Oil Operator | Feb 2015 | |
| 3 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 4 | Energex Petroleum Inc | Oil Operator | Sep 2019 | |
| 5 | Energy Acquisition Corp And Weitzman Irvin | Oil & Gas Operator | Dec 2003 | |
| 6 | Energy Acquisition Corp W W Energy Weitzman Irvin | Oil & Gas Operator | Jun 2016 | |
| 7 | Energy America Michigan LLC | Oil Operator | Jan 2017 | |
| 8 | Energy Producers Inc | Oil Operator | Nov 1989 | |
| 9 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 10 | Environmental Soil Recovery LTD | Oil Operator | Jan 2024 | |
| 11 | Eps Resources Corp | Englewood, CO 80111 | Oil & Gas Operator | Dec 2009 |
| 12 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Nov 2023 |
| 13 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Mar 2024 |