| 1 | E & B Natural Resources Management | Guilderland Centek, NY 12085 | Oil & Gas Operator | Feb 2024 |
| 2 | Earthstone Energy, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2017 |
| 3 | Earthstone Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2024 |
| 4 | Eason Oil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2012 |
| 5 | Eberspecher Drilling Inc | Casper, WY 82601 | Oil & Gas Operator | Dec 2000 |
| 6 | Eex Corporation | Houston, TX 77060 | Oil & Gas Operator | Feb 2000 |
| 7 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Feb 2024 |
| 8 | Elephant Operating LLC | Dallas, TX 75204 | Oil & Gas Operator | Feb 2024 |
| 9 | Ellbogen John P LTD | Casper, WY 82602 | Oil & Gas Operator | Mar 2024 |
| 10 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 11 | Energas Corporation | Oklahoma City, OK 73105-6422 | Oil & Gas Operator | Jan 2024 |
| 12 | Energetics Inc | Englewood, CO 80155 | Oil & Gas Operator | Aug 1985 |
| 13 | Energy Search Company Inc | Aurora, CO 80011 | Oil & Gas Operator | Jun 2021 |
| 14 | Enpro LLC | Cottonwood, UT 84047 | Oil & Gas Operator | Nov 2017 |
| 15 | Envirosearch Corporation | | Oil Operator | Dec 1992 |
| 16 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 17 | EOG Y Resources Inc | Artesia, NM 88210 | Oil & Gas Operator | Feb 2019 |
| 18 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | May 2022 |
| 19 | Equitable Resources Energy Company | Big Stone Gap, VA 24219 | Oil & Gas Operator | Dec 1997 |
| 20 | Evergreen Operating Company | Denver, CO 80202 | Oil & Gas Operator | Apr 1996 |
| 21 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Jan 2024 |
| 22 | Exeter Drilling Company | Denver, CO 80217 | Oil & Gas Operator | Sep 1997 |
| 23 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |
| 24 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Mar 2024 |