| 1 | Eado Production, Inc. | Kermit, TX 79745 | Oil & Gas Operator | Aug 2012 |
| 2 | Eagle Capital Partners, LLC | Eunice, NM 88231 | Oil & Gas Operator | Oct 2025 |
| 3 | Eagle Rock Operating Company,LLC | Houston, TX 77252 | Oil & Gas Operator | Oct 2015 |
| 4 | Earnest Producing Corporation | Midland, TX 79704 | Oil & Gas Operator | Oct 2025 |
| 5 | Eastland Oil Company, The | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 6 | Eclipse Services, Inc. * | La Grange, TX 78945 | Oil & Gas Operator | Jul 2003 |
| 7 | Edisto Resources Corp | Houston, TX 77057 | Oil & Gas Operator | Oct 1999 |
| 8 | Edward Oil Company | Youngsville, PA 16371 | Oil & Gas Operator | Nov 2024 |
| 9 | Eex Corporation | Houston, TX 77060 | Oil & Gas Operator | Feb 2000 |
| 10 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Jul 2025 |
| 11 | Elson Oil Company | Tulsa, OK 74103-4429 | Oil & Gas Operator | Dec 2016 |
| 12 | Enable Midstream Partners, LP | Oklahoma City, OK 73124 | Oil Operator | Sep 2023 |
| 13 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 14 | Energen Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2021 |
| 15 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | May 2025 |
| 16 | Enerquest Oil & Gas LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Jun 2025 |
| 17 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 18 | Eng, George E. | Midland, TX 79701 | Oil & Gas Operator | Dec 2011 |
| 19 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 20 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 21 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 22 | EP Operating Limited Partnership | Dallas, TX 75201 | Oil & Gas Operator | Feb 1995 |
| 23 | Ericksen, W.R. | Hobbs, NM 88240 | Oil & Gas Operator | Nov 1993 |
| 24 | Estoril Producing Corporation | Midland, TX 79701 | Oil & Gas Operator | Apr 1994 |
| 25 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 26 | Etc Field Services LLC | San Antonio, TX 78258 | Oil Operator | Jun 2018 |
| 27 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 28 | Exchange Avenue Production Co. | Weatherford, TX 76086 | Oil & Gas Operator | Sep 2021 |
| 29 | Exl Petroleum Operating Inc. | Midland, TX 79705 | Oil & Gas Operator | Feb 2020 |
| 30 | Explo Oil, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Oct 2025 |
| 31 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Oct 2025 |
| 32 | Exxon Corp. - Midland | Houston, TX 77210 | Gas Operator | Jul 1997 |
| 33 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 34 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Oct 2025 |
| 35 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Jul 2025 |