| 1 | E.C. Production, L.L.C. | Rosenberg, TX 77471 | Oil & Gas Operator | Jul 2025 |
| 2 | Eagle Oil Management, LLC | Shreveport, LA 71106 | Oil & Gas Operator | Jul 2025 |
| 3 | Eason Production Company | Atlanta, TX 75551 | Oil & Gas Operator | May 2007 |
| 4 | East Texas Exploration, LLC | Edmond, OK 73003 | Oil & Gas Operator | Sep 2019 |
| 5 | Eastex Crude Company, LLC | Leesburg, TX 75451 | Oil & Gas Operator | Jul 2025 |
| 6 | Eastex Operating, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Jun 2003 |
| 7 | Edmonds, Karl F. Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2005 |
| 8 | Eex E&P Company, L.P. | Houston, TX 77060 | Oil & Gas Operator | Jul 2003 |
| 9 | El Paso E&P Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2013 |
| 10 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 11 | Elms Oil Company | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2025 |
| 12 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 13 | Encrescent, LLC | Dallas, TX 75205 | Oil & Gas Operator | Jul 2025 |
| 14 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 15 | Endurance Oil & Gas, Inc. | Minden, LA 71055 | Oil & Gas Operator | Jul 2025 |
| 16 | Enduring Resources, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | May 2025 |
| 17 | Energetics Inc | Englewood, CO 80155 | Oil & Gas Operator | Aug 1985 |
| 18 | Energy Oil & Gas Corporation | Austin, TX 78746 | Oil & Gas Operator | Jul 2025 |
| 19 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | Mar 2025 |
| 20 | Enerquest Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2025 |
| 21 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 22 | Enpower Resources Inc. | Sugar Land, TX 77479 | Oil & Gas Operator | Jul 2025 |
| 23 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 24 | Ensight Resources, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2001 |
| 25 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 26 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | Jan 2023 |
| 27 | Erso, Inc. | Houston, TX 77002 | Gas Operator | Mar 1995 |
| 28 | Estate Oil & Gas Corp. | Dallas, TX 75206 | Oil & Gas Operator | Oct 2011 |
| 29 | Etopsi Oil And Gas, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2025 |
| 30 | Evergreen Operating Co., LTD. | McAllen, TX 78502 | Oil & Gas Operator | Jul 2025 |
| 31 | Exco Operating Company, LP | Dallas, TX 75251 | Oil & Gas Operator | Jul 2025 |
| 32 | Exco Production Company, LP | Dallas, TX 75251 | Oil & Gas Operator | Dec 2009 |
| 33 | Exco/Hgi JV Assets, LLC | Dallas, TX 75251 | Oil & Gas Operator | Jun 2014 |
| 34 | Explo Oil, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Jul 2025 |
| 35 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 36 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Jul 2025 |