| 1 | E.C. Hindman Oil And Gas | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 2 | Eagle Energy Acquisitions LP | Houston, TX 77002 | Oil & Gas Operator | Aug 2014 |
| 3 | Eagle Hydrocarbons (Texas) Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 4 | Eagle Hydrocarbons Inc. | Houston, TX 77079 | Oil & Gas Operator | Jun 2020 |
| 5 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Feb 2026 |
| 6 | Eagleridge Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Feb 2026 |
| 7 | Earth Science Exploration, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Nov 2012 |
| 8 | Echo Production Inc | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 9 | El Ran, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Feb 2026 |
| 10 | El Reno Energy, LLC | Granbury, TX 76048 | Oil & Gas Operator | Feb 2026 |
| 11 | Energy Development Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2024 |
| 12 | Energy Resource & Develop., Corp | Rockwall, TX 75087 | Oil & Gas Operator | Jun 1998 |
| 13 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | Nov 2025 |
| 14 | Energy Well Service, Inc. | Stephenville, TX 76401 | Oil & Gas Operator | Oct 2004 |
| 15 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 16 | Engas Corporation | Jacksboro, TX 76458 | Oil & Gas Operator | May 2008 |
| 17 | Enr Operating, LLC | Eunice, NM 88231 | Oil & Gas Operator | Feb 2026 |
| 18 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 19 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 20 | EP Operating Limited Partnership | Dallas, TX 75201 | Oil & Gas Operator | Feb 1995 |
| 21 | Eratz Investments Inc. | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 22 | Ernmar Investments, Inc. | Edmond, OK 73083 | Oil & Gas Operator | Feb 2026 |
| 23 | Erwin Operating | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 24 | Erwin, James D. | Dallas, TX 75225 | Oil & Gas Operator | Nov 1993 |
| 25 | Esg Resources LLC | Dallas, TX 75231 | Oil & Gas Operator | Feb 2026 |
| 26 | Evarado Oil Company | Strawn, TX 76475 | Oil & Gas Operator | Feb 2026 |
| 27 | Evarado Oil, LLC | Strawn, TX 76475 | Oil & Gas Operator | Feb 2026 |
| 28 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Nov 2025 |
| 29 | Exorare Energy, Inc. | Dallas, TX 75218 | Oil & Gas Operator | Feb 2026 |
| 30 | Exp, Inc. | Dallas, TX 75244 | Oil & Gas Operator | May 2003 |