| 1 | Eagle Operating Inc | Minot, ND 58701 | Oil & Gas Operator | Sep 2024 |
| 2 | Earl Schwartz Co. | | Oil & Gas Operator | Oct 1989 |
| 3 | Earthstone Energy, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2017 |
| 4 | Earthstone Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Nov 2024 |
| 5 | Edward Mike Davis | Las Vegas, NV 89107 | Oil & Gas Operator | Feb 2003 |
| 6 | Edward Mike Davis, L.L.C. | | Oil & Gas Operator | Dec 2006 |
| 7 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Sep 2024 |
| 8 | Elk Oil Company | Overland Park, KS 66212 | Oil & Gas Operator | Sep 2007 |
| 9 | Emep Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2024 |
| 10 | Emerald Oil, Inc | | Oil & Gas Operator | Dec 2016 |
| 11 | Empire North Dakota LLC | Tulsa, OK 74114 | Oil & Gas Operator | Sep 2024 |
| 12 | Encore Energy Partners Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2015 |
| 13 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Sep 2024 |
| 14 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Nov 2024 |
| 15 | Enduro Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2018 |
| 16 | Energy Equity Company | Columbus, MT 59019 | Oil & Gas Operator | Sep 2024 |
| 17 | Energy Operating Company Inc | Lakewood, CO 80235 | Oil & Gas Operator | Dec 2012 |
| 18 | Energyquest II, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Sep 2024 |
| 19 | Enerplus Resources USA Corporation | Denver, CO 80202 | Oil & Gas Operator | Sep 2024 |
| 20 | Ensign Operating Co. | Denver, CO 80202 | Oil & Gas Operator | Jan 2004 |
| 21 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Nov 2024 |
| 22 | Equinor Energy LP | Austin, TX 78730 | Oil & Gas Operator | Oct 2021 |
| 23 | Evertson Operating Company Inc | Kimball, NE 69145 | Oil & Gas Operator | Nov 2022 |
| 24 | Exeter Exploration Co. | | Oil & Gas Operator | Aug 1985 |
| 25 | Exploration Company, The | San Antonio, TX 78258 | Oil & Gas Operator | Jun 2010 |