| 1 | E & B Natural Resources Management | Guilderland Centek, NY 12085 | Oil & Gas Operator | Oct 2024 |
| 2 | Eex Corporation | Houston, TX 77060 | Oil & Gas Operator | Feb 2000 |
| 3 | Elf Aquitaine Inc | Houston, TX 77002 | Oil & Gas Operator | May 1991 |
| 4 | Elk Petroleum Inc | Casper, WY 82601 | Oil & Gas Operator | Aug 2014 |
| 5 | Elm Ridge Exploration Company LLC | Bloomfield, NM 87413 | Oil & Gas Operator | Nov 2017 |
| 6 | Emerald Operating Company | Plano, TX 75075 | Oil & Gas Operator | Oct 2024 |
| 7 | Enerex Limited Liability Co | Craig, CO 81625 | Oil & Gas Operator | Jun 2024 |
| 8 | Energy Search Company Inc | Aurora, CO 80011 | Oil & Gas Operator | Jun 2021 |
| 9 | Envirosearch Corporation | | Oil Operator | Dec 1992 |
| 10 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2024 |
| 11 | EOG Y Resources Inc | Artesia, NM 88210 | Oil & Gas Operator | Feb 2019 |
| 12 | Equitable Resources Energy Company | Big Stone Gap, VA 24219 | Oil & Gas Operator | Dec 1997 |
| 13 | Escalera Resources Co | Casper, WY 82602 | Oil & Gas Operator | May 2018 |
| 14 | Everest Oil & Gas LLC | Santa Barbara, CA 93101 | Oil Operator | Sep 2024 |
| 15 | Evertson Operating Company Inc | Kimball, NE 69145 | Oil & Gas Operator | Nov 2022 |
| 16 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Sep 2024 |
| 17 | Exeter Drilling Company | Denver, CO 80217 | Oil & Gas Operator | Sep 1997 |
| 18 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Dec 2024 |
| 19 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Oct 2024 |