| 1 | E.G. Operating | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 2 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Dec 2024 |
| 3 | Edge Petroleum Oper. Co., Inc. | Houston, TX 77042 | Oil & Gas Operator | Nov 2010 |
| 4 | El Dorado Gas & Oil, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Dec 2024 |
| 5 | El Paso E&P Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2013 |
| 6 | El Paso Production Oil & Gas Co. | Houston, TX 77252 | Oil & Gas Operator | Dec 2024 |
| 7 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Sep 2024 |
| 8 | Ellsworth, H. P. O&G Properties | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Dec 2024 |
| 9 | Endeavor Natural Gas, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2015 |
| 10 | Energy 2000, Inc. | Reno, NV 89501 | Oil & Gas Operator | Dec 2024 |
| 11 | Enerquest Operating, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Dec 2024 |
| 12 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 13 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2024 |
| 14 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | May 2022 |
| 15 | Erskine Energy, LLC | H SPG NTL PK, AR 71909 | Oil & Gas Operator | Dec 2024 |
| 16 | Etc Texas Pipeline, LTD. | San Antonio, TX 78258 | Oil Operator | Sep 2023 |
| 17 | Everest Resource Company | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Dec 2024 |
| 18 | Evergreen Operating Co., LTD. | McAllen, TX 78502 | Oil & Gas Operator | Dec 2024 |
| 19 | Expro Engineering, Inc. | Fort Worth, TX 76179 | Oil & Gas Operator | Dec 2024 |
| 20 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 21 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Dec 2024 |