| 1 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Jun 2026 |
| 2 | Eca Holdings, L.P. | Sugar Land, TX 77478 | Oil & Gas Operator | Mar 2010 |
| 3 | Edinger Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2007 |
| 4 | Edwards, Gus Co. | Abilene, TX 79603 | Oil & Gas Operator | Jun 2004 |
| 5 | Eex Corporation | Houston, TX 77060 | Oil & Gas Operator | Feb 2000 |
| 6 | El Paso Production Oil & Gas Co. | Houston, TX 77252 | Oil & Gas Operator | Jun 2026 |
| 7 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Mar 2026 |
| 8 | Elliott Oil & Gas Company | The Woodlands, TX 77380 | Oil & Gas Operator | Sep 2006 |
| 9 | Elliott Oil & Gas Operating Co. | Magnolia, TX 77354 | Oil & Gas Operator | Jun 2026 |
| 10 | Elliott Oil Company, L.P. | Magnolia, TX 77354 | Oil & Gas Operator | Jun 2026 |
| 11 | Eminent Oil & Gas, Inc. | Houston, TX 77077 | Oil & Gas Operator | Jun 2026 |
| 12 | Endeavor Natural Gas, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2015 |
| 13 | Endeavor Natural Gas, LP | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 14 | Energy Development Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2025 |
| 15 | Energy Oil & Gas Corporation | Austin, TX 78746 | Oil & Gas Operator | Jun 2026 |
| 16 | Energy Reserves Group LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2018 |
| 17 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | Jan 2026 |
| 18 | Energyquest II, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Feb 2026 |
| 19 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 20 | Engroup Resources, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 21 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 22 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 23 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Jun 2026 |
| 24 | Erg Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2015 |
| 25 | Esenjay Exploration, Inc | Houston, TX 77042 | Oil & Gas Operator | Feb 2026 |
| 26 | Esenjay Petroleum Corp. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jul 1998 |
| 27 | European-Southwest Co. | Houston, TX 77254 | Oil & Gas Operator | Jun 2026 |
| 28 | Evergreen Energy, Inc | Houston, TX 77098 | Oil & Gas Operator | Jun 2026 |
| 29 | Exotic Oil & Gas LLC | Indiana, PA 15701-3634 | Oil & Gas Operator | Dec 2025 |
| 30 | Express Oil Co. | Hallettsville, TX 77964 | Oil & Gas Operator | Jun 2026 |
| 31 | Expro Engineering, Inc. | Fort Worth, TX 76179 | Oil & Gas Operator | Jun 2026 |
| 32 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jan 2026 |
| 33 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Jun 2026 |
| 34 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Mar 2026 |