| 1 | E/T Petroleum Co. | Big Lake, TX 76932 | Oil & Gas Operator | Aug 2014 |
| 2 | Eagle Capital Partners, LLC | Eunice, NM 88231 | Oil & Gas Operator | Oct 2025 |
| 3 | Eagle Operating | Midland, TX 79707 | Oil & Gas Operator | May 2013 |
| 4 | Earthstone Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Jul 2025 |
| 5 | Edmar Company, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 6 | Eex Corporation | Houston, TX 77060 | Oil & Gas Operator | Feb 2000 |
| 7 | Eggleston, Garaland | Big Lake, TX 76932 | Oil & Gas Operator | Aug 2003 |
| 8 | Egi, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Oct 2025 |
| 9 | El Paso E&P Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2013 |
| 10 | Elco Oil & Gas | San Angelo, TX 76902 | Oil & Gas Operator | Dec 2014 |
| 11 | Eldorado Oil And Gas, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Nov 1995 |
| 12 | Elevation Resources LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 13 | Ellison Lease Operating | Bridgeport, TX 76426 | Oil & Gas Operator | Oct 2025 |
| 14 | Elson Oil Company | Tulsa, OK 74103-4429 | Oil & Gas Operator | Dec 2016 |
| 15 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 16 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 17 | Enduring Resources, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Jul 2025 |
| 18 | Energen Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2021 |
| 19 | Energy Management Company | Kilgore, TX 75663 | Oil Operator | Apr 2020 |
| 20 | Energy Production Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 21 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | May 2025 |
| 22 | Enerquest Oil & Gas LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Jun 2025 |
| 23 | Eng, George E. | Midland, TX 79701 | Oil & Gas Operator | Dec 2011 |
| 24 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 25 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 26 | EOG (Oklahoma) Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Oct 2016 |
| 27 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 28 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | Jan 2023 |
| 29 | EP Operating Limited Partnership | Dallas, TX 75201 | Oil & Gas Operator | Feb 1995 |
| 30 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 31 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Oct 2025 |
| 32 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 33 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Oct 2025 |