| 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 Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Sep 2025 |
| 4 | Eagle Rock Operating Company,LLC | Houston, TX 77252 | Oil & Gas Operator | Oct 2015 |
| 5 | Eason Production Company | Atlanta, TX 75551 | Oil & Gas Operator | May 2007 |
| 6 | Eastland Oil Company, The | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 7 | Edisto Resources Corp | Houston, TX 77057 | Oil & Gas Operator | Oct 1999 |
| 8 | Ef Oil And Gas Invest, L.L.C. | Beaver, OK 73932 | Oil Operator | Sep 2025 |
| 9 | Elendil Resources LLC | Pampa, TX 79066 | Oil & Gas Operator | Sep 2025 |
| 10 | Elevation Resources LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 11 | Elk River Resources, LLC | The Woodlands, TX 77382 | Oil & Gas Operator | Oct 2023 |
| 12 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 13 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Jun 2025 |
| 14 | Encore Permian Operating, LLC | Uvalde, TX 78801 | Oil & Gas Operator | Sep 2025 |
| 15 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 16 | Endurance Resources LLC | Addison, TX 75001 | Oil & Gas Operator | Apr 2017 |
| 17 | Energen Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2021 |
| 18 | Energy Equity Company | Columbus, MT 59019 | Oil & Gas Operator | Jun 2025 |
| 19 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | May 2025 |
| 20 | Energyquest II, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | May 2025 |
| 21 | Enerstar Resources, L.C. | Midland, TX 79701 | Oil & Gas Operator | Apr 1999 |
| 22 | Enertex, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 1995 |
| 23 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 24 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 25 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 26 | Eqv Operating LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | Sep 2025 |
| 27 | Estoril Producing Corporation | Midland, TX 79701 | Oil & Gas Operator | Apr 1994 |
| 28 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 29 | Etc Field Services LLC | San Antonio, TX 78258 | Oil Operator | Jun 2018 |
| 30 | Etc Oil Co. | Pecos, TX 79772 | Oil & Gas Operator | Mar 2004 |
| 31 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 32 | Eureka Prospecting Company | Wimberley, TX 78676 | Oil & Gas Operator | Jun 2023 |
| 33 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | May 2025 |
| 34 | Exl Petroleum Operating Inc. | Midland, TX 79705 | Oil & Gas Operator | Feb 2020 |
| 35 | Exl Petroleum, LP | Midland, TX 79705 | Oil & Gas Operator | Jun 2017 |
| 36 | Exok, Inc. | Oklahoma City, OK 73116 | Oil & Gas Operator | May 2025 |
| 37 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Sep 2025 |
| 38 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 39 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Sep 2025 |