| 1 | Edward Oil Company | Youngsville, PA 16371 | Oil & Gas Operator | Nov 2024 |
| 2 | Edwin L. Cox | | Oil & Gas Operator | May 1986 |
| 3 | El Paso Production Gom, Inc. | | Oil & Gas Operator | Nov 2005 |
| 4 | Energy Corp. Of America, Inc. | | Oil & Gas Operator | Aug 1998 |
| 5 | Energy Resource Technology Gom, LLC | | Oil & Gas Operator | Oct 2019 |
| 6 | Energy Resources Oil & Gas Corp. | Amarillo, TX 79102 | Oil & Gas Operator | Jun 1994 |
| 7 | Energy Self-Service Oils, Inc. | | Oil & Gas Operator | Apr 2009 |
| 8 | Energy Xxi Gom, LLC | | Oil & Gas Operator | Dec 2023 |
| 9 | Energy Xxi Gulf Coast, Inc. | | Oil & Gas Operator | Dec 2008 |
| 10 | Energy Xxi Onshore, LLC | | Oil & Gas Operator | Dec 2023 |
| 11 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 12 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 13 | Equitable Petroleum Corp. | | Oil & Gas Operator | Jan 1999 |
| 14 | Evangeline Natural Resources, LLC | | Oil & Gas Operator | Jan 2025 |
| 15 | Expert Oil & Gas, L.L.C. | | Oil & Gas Operator | Nov 2024 |
| 16 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Oct 2025 |
| 17 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 18 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Oct 2025 |