| 1 | E.G.L. Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 2 | Eado Production, Inc. | Kermit, TX 79745 | Oil & Gas Operator | Aug 2012 |
| 3 | Eagle Energy Development Co | La Porte, TX 77571 | Oil & Gas Operator | Dec 2024 |
| 4 | Eagle Energy Resources, LLC | La Porte, TX 77571 | Oil & Gas Operator | Nov 2025 |
| 5 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Nov 2025 |
| 6 | Eagle Rock Operating Company,LLC | Houston, TX 77252 | Oil & Gas Operator | Oct 2015 |
| 7 | Earnest Producing Corporation | Midland, TX 79704 | Oil & Gas Operator | Nov 2025 |
| 8 | Eason Production Company | Atlanta, TX 75551 | Oil & Gas Operator | May 2007 |
| 9 | Eclipse Oil & Gas, Inc. | Midland, TX 79703 | Oil & Gas Operator | Nov 2025 |
| 10 | Eex Corporation | Houston, TX 77060 | Oil & Gas Operator | Feb 2000 |
| 11 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Aug 2025 |
| 12 | Elevation Resources LLC | Midland, TX 79701 | Oil & Gas Operator | Nov 2025 |
| 13 | En Geo, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Nov 2025 |
| 14 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Aug 2025 |
| 15 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 16 | Energen Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2021 |
| 17 | Energy Equity Company | Columbus, MT 59019 | Oil & Gas Operator | Aug 2025 |
| 18 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | Jul 2025 |
| 19 | Energyquest II, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Jul 2025 |
| 20 | Enertex, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 1995 |
| 21 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2025 |
| 22 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 23 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 24 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Nov 2025 |
| 25 | EP Operating Limited Partnership | Dallas, TX 75201 | Oil & Gas Operator | Feb 1995 |
| 26 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 27 | Etc Field Services LLC | San Antonio, TX 78258 | Oil Operator | Jun 2018 |
| 28 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 29 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Jul 2025 |
| 30 | Explo Oil, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Nov 2025 |
| 31 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Nov 2025 |
| 32 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 33 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Nov 2025 |
| 34 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Aug 2025 |