| 1 | E P C Oil & Gas, Inc. | Caldwell, TX 77836 | Oil & Gas Operator | Dec 2024 |
| 2 | Eagle Valley Development LLC | Austin, TX 78738 | Oil & Gas Operator | Oct 2023 |
| 3 | Eclipse Services, Inc. * | La Grange, TX 78945 | Oil & Gas Operator | Jul 2003 |
| 4 | Edco Energy, Inc. | Austin, TX 78738 | Oil & Gas Operator | May 2003 |
| 5 | Edwards, Gus Co. | Abilene, TX 79603 | Oil & Gas Operator | Jun 2004 |
| 6 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Dec 2024 |
| 7 | Energy Resource Management, Inc. | Caldwell, TX 77836 | Oil & Gas Operator | Mar 2008 |
| 8 | Energy Transfer Crude Marketing LLC | Houston, TX 77002 | Oil Operator | Sep 2024 |
| 9 | Enerquest Oil & Gas LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2024 |
| 10 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 11 | Enterprise Crude Oil LLC | Oklahoma City, OK 73102 | Oil Operator | Aug 2011 |
| 12 | Ernest Operating Company | Rockdale, TX 76567 | Oil & Gas Operator | Dec 2024 |
| 13 | Esenjay Petroleum Corp. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jul 1998 |
| 14 | Et Gathering & Processing LLC | San Antonio, TX 78258 | Oil Operator | Jun 2024 |
| 15 | Etc Texas Pipeline, LTD. | San Antonio, TX 78258 | Oil Operator | Sep 2023 |
| 16 | Etoco Incorporated | Houston, TX 77002 | Oil & Gas Operator | May 2005 |
| 17 | Etx Energy, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2022 |
| 18 | Evolution Operating Co., Inc. | Houston, TX 77079 | Oil & Gas Operator | Dec 2024 |
| 19 | Excelco Energy Inc. | Kingwood, TX 77339 | Oil & Gas Operator | Jul 2018 |
| 20 | Exploration Techniques Inc. | Houston, TX 77027 | Oil & Gas Operator | Dec 2024 |
| 21 | Express Oil Co. | Hallettsville, TX 77964 | Oil & Gas Operator | Dec 2024 |
| 22 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 23 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Dec 2024 |