| 1 | Eagleridge Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Mar 2025 |
| 2 | Eca Holdings, L.P. | Sugar Land, TX 77478 | Oil & Gas Operator | Mar 2010 |
| 3 | Eex E&P Company, L.P. | Houston, TX 77060 | Oil & Gas Operator | Jul 2003 |
| 4 | El Paso Production Oil & Gas Co. | Houston, TX 77252 | Oil & Gas Operator | Mar 2025 |
| 5 | El Reno Energy, LLC | Granbury, TX 76048 | Oil & Gas Operator | Mar 2025 |
| 6 | Elliott Oil & Gas Company | The Woodlands, TX 77380 | Oil & Gas Operator | Sep 2006 |
| 7 | Energy Corporation Of America | Charleston, WV 25311 | Oil & Gas Operator | Dec 2022 |
| 8 | Energy Development Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2024 |
| 9 | Energy Reserves Group | Houston, TX 770563020 | Oil & Gas Operator | Apr 1996 |
| 10 | Energy Reserves Group LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2018 |
| 11 | Energy Transfer Crude Marketing LLC | Houston, TX 77002 | Oil Operator | Dec 2024 |
| 12 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 13 | Engelke, R. H. | San Antonio, TX 78230 | Oil & Gas Operator | Mar 2025 |
| 14 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 15 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 16 | Enstor Katy Storage & Transp LP | Houston, TX 77042 | Oil & Gas Operator | Mar 2025 |
| 17 | Enterprise Crude Oil LLC | Oklahoma City, OK 73102 | Oil Operator | Aug 2011 |
| 18 | EP Operating Limited Partnership | Dallas, TX 75201 | Oil & Gas Operator | Feb 1995 |
| 19 | Etoco Incorporated | Houston, TX 77002 | Oil & Gas Operator | May 2005 |
| 20 | Etoco, L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 21 | Everest Resource Company | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Mar 2025 |
| 22 | Evolution Resources, LLC | Houston, TX 77070 | Oil & Gas Operator | Mar 2025 |
| 23 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 24 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Mar 2025 |