| 1 | E.G. Operating | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 2 | E.G.L. Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 3 | Eagle Capital Partners, LLC | Eunice, NM 88231 | Oil & Gas Operator | Jun 2025 |
| 4 | Eastland Oil Company, The | Midland, TX 79702 | Oil & Gas Operator | Jun 2025 |
| 5 | Echo Production Inc | Graham, TX 76450 | Oil & Gas Operator | Jun 2025 |
| 6 | Edge Oil And Gas, LLC | Abilene, TX 79602 | Oil Operator | Jun 2025 |
| 7 | Eex Corporation | Houston, TX 77060 | Oil & Gas Operator | Feb 2000 |
| 8 | Elam, Jack G., Inc. | Midland, TX 79702 | Oil & Gas Operator | Nov 2002 |
| 9 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Mar 2025 |
| 10 | Element Petro Operating II, LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2016 |
| 11 | Element Petroleum Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2015 |
| 12 | Elk River Resources, LLC | The Woodlands, TX 77382 | Oil & Gas Operator | Oct 2023 |
| 13 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Jun 2025 |
| 14 | Energen Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2021 |
| 15 | Energy Hunter Resources, Inc. | Houston, TX 77024 | Oil & Gas Operator | Feb 2019 |
| 16 | Energy Resources Oil & Gas Corp. | Amarillo, TX 79102 | Oil & Gas Operator | Jun 1994 |
| 17 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | Jan 2025 |
| 18 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2025 |
| 19 | Engelke, R. H. | San Antonio, TX 78230 | Oil & Gas Operator | Jun 2025 |
| 20 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 21 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 22 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 2025 |
| 23 | EP Operating Limited Partnership | Dallas, TX 75201 | Oil & Gas Operator | Feb 1995 |
| 24 | Estancia Oil & Gas, LLC | Austin, TX 78716 | Oil & Gas Operator | Jun 2025 |
| 25 | Exco Partners Operating PTSHP LP | Dallas, TX 75251 | Oil & Gas Operator | Jan 2009 |
| 26 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Feb 2025 |
| 27 | Exco/Hgi JV Assets, LLC | Dallas, TX 75251 | Oil & Gas Operator | Jun 2014 |
| 28 | Exl Petroleum Operating Inc. | Midland, TX 79705 | Oil & Gas Operator | Feb 2020 |
| 29 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Jun 2025 |
| 30 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |