| 1 | E-L Gas Co., LTD. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2001 |
| 2 | E.C. Hindman Oil And Gas | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 3 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2024 |
| 4 | Eagleridge Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Apr 2024 |
| 5 | Ebs Oil & Gas Partners Op.Co.,LP | Dallas, TX 75219 | Oil & Gas Operator | May 2006 |
| 6 | Ec Stryker Inc | Decatur, TX 76234 | Oil & Gas Operator | Dec 2015 |
| 7 | Echo Production Inc | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 8 | Edco Energy, Inc. | Austin, TX 78738 | Oil & Gas Operator | May 2003 |
| 9 | Edmonds Management Company | Richardson, TX 75081 | Oil & Gas Operator | Mar 2015 |
| 10 | Eex Corporation | Houston, TX 77060 | Oil & Gas Operator | Feb 2000 |
| 11 | Efficiency Operating Service | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 12 | El Ran, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Apr 2024 |
| 13 | El Reno Energy, LLC | Granbury, TX 76048 | Oil & Gas Operator | Apr 2024 |
| 14 | Emerald Petroleum Corporation | Dallas, TX 75244 | Oil & Gas Operator | Apr 2002 |
| 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 | Apr 2024 |
| 17 | Energypro, Inc. | Magnolia, TX 77354 | Oil & Gas Operator | Apr 2024 |
| 18 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 19 | Enexco, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Mar 2017 |
| 20 | Enlo Energy Co., LTD. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2001 |
| 21 | Enre Corp. | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2005 |
| 22 | Enre LP | Kingwood, TX 77339 | Oil & Gas Operator | Feb 2004 |
| 23 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 24 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 25 | EP Operating Limited Partnership | Dallas, TX 75201 | Oil & Gas Operator | Feb 1995 |
| 26 | Ernmar Investments, Inc. | Edmond, OK 73083 | Oil & Gas Operator | Apr 2024 |
| 27 | Everest Energy LLC | Graham, TX 76450 | Oil & Gas Operator | Jun 2023 |
| 28 | Excel Oil & Gas, Inc. | Waxahachie, TX 75168 | Oil & Gas Operator | Apr 2024 |
| 29 | Exit Oil & Gas | Flower Mound, TX 75028 | Oil & Gas Operator | Apr 2024 |
| 30 | Exorare Energy, Inc. | Dallas, TX 75218 | Oil & Gas Operator | Apr 2024 |
| 31 | Export Petroleum Corporation | Fort Worth, TX 76147 | Oil & Gas Operator | Apr 2024 |
| 32 | Expro Engineering, Inc. | Fort Worth, TX 76179 | Oil & Gas Operator | Apr 2024 |
| 33 | Extech Operating, LLC | Fort Worth, TX 76147 | Oil & Gas Operator | Apr 2024 |
| 34 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Apr 2024 |