| 1 | Earthbound Resources LLC | Merkel, TX 79536 | Oil & Gas Operator | Oct 2025 |
| 2 | Eastco Gas Co. | Midland, TX 79707 | Oil & Gas Operator | Oct 1999 |
| 3 | Echo Production Inc | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 4 | Edge Oil And Gas, LLC | Abilene, TX 79602 | Oil Operator | Oct 2025 |
| 5 | Edinburgh Energy Partners, LLC | Midland, TX 79707 | Oil & Gas Operator | Oct 2025 |
| 6 | Edington Oil Company | Albany, TX 76430 | Oil & Gas Operator | Aug 2006 |
| 7 | Edmar Company, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 8 | Edmondson Oil & Gas | Ballinger, TX 76821 | Oil & Gas Operator | Oct 2025 |
| 9 | Edwards, Gus Co. | Abilene, TX 79603 | Oil & Gas Operator | Jun 2004 |
| 10 | El Reno Energy, LLC | Granbury, TX 76048 | Oil & Gas Operator | Oct 2025 |
| 11 | Elk Energy Corporation | Denver, CO 80218 | Oil & Gas Operator | Mar 2008 |
| 12 | Encino Exploration, Inc. | George West, TX 78022 | Oil & Gas Operator | Oct 2025 |
| 13 | Encon Services, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 14 | Encore Energy, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |
| 15 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 16 | Energex Inc. | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 17 | Energy Resource & Develop., Corp | Rockwall, TX 75087 | Oil & Gas Operator | Jun 1998 |
| 18 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | May 2025 |
| 19 | Enexco, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Mar 2017 |
| 20 | Enrich Oil Corporation | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 21 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 22 | Eor Operating Company | Houston, TX 77079 | Oil & Gas Operator | Oct 2025 |
| 23 | Erson Royalty Company, Inc. | Merkel, TX 79536 | Oil & Gas Operator | Feb 2006 |
| 24 | Estacado Energy, LLC | Iowa Park, TX 76367 | Oil & Gas Operator | Oct 2025 |
| 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 | Ex-Cel Resources, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 28 | Exlco, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 29 | Exmoor Oil & Minerals Corp. | Dallas, TX 75225 | Oil & Gas Operator | May 1994 |
| 30 | Exp, Inc. | Dallas, TX 75244 | Oil & Gas Operator | May 2003 |
| 31 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |