| 1 | E Texas Production MGMT Co Inc | | Oil & Gas Operator | Oct 1996 |
| 2 | E. Conway Butts, Inc. | | Oil & Gas Operator | Apr 1991 |
| 3 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | May 2024 |
| 4 | Eclipse Petroleum Corporation | La Grange, TX 78945 | Oil & Gas Operator | Aug 2003 |
| 5 | Eddy Enterprises, Inc. | | Oil & Gas Operator | Sep 2023 |
| 6 | Eex Corporation | Houston, TX 77060 | Oil & Gas Operator | Feb 2000 |
| 7 | Egh Operating, LLC | | Oil & Gas Operator | Nov 2023 |
| 8 | El Paso E&P Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2013 |
| 9 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 10 | Eli Rebich | | Oil & Gas Operator | Dec 1986 |
| 11 | Ellora Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | May 2024 |
| 12 | Ellora Operating, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2011 |
| 13 | Empresa Energy IV, LLC | | Oil & Gas Operator | Jul 2019 |
| 14 | Empresa Energy, LP | Houston, TX 77024 | Oil & Gas Operator | Jul 2009 |
| 15 | Enable Midstream Partners, LP | Oklahoma City, OK 73124 | Oil Operator | Sep 2023 |
| 16 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 17 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | May 2024 |
| 18 | Endeavor Natural Gas, LP | Houston, TX 77002 | Oil & Gas Operator | May 2024 |
| 19 | Enerco Exploration & MGMT. Co. | | Oil & Gas Operator | Aug 1981 |
| 20 | Energy Development Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2023 |
| 21 | Energy Finders, Inc. | | Oil & Gas Operator | Dec 1981 |
| 22 | Energy Reserves GP-Kanaba Oil | | Oil & Gas Operator | Aug 1985 |
| 23 | Energy Reserves Group | Houston, TX 770563020 | Oil & Gas Operator | Apr 1996 |
| 24 | Energy Sources, Inc. | | Oil & Gas Operator | Nov 1990 |
| 25 | Enlink Lig, LLC | | Oil Operator | Jan 2024 |
| 26 | Enpower Resources Inc. | Sugar Land, TX 77479 | Oil & Gas Operator | May 2024 |
| 27 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 28 | Ensight IV Energy Management,LLC | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2024 |
| 29 | Enterprise Gathering LLC | | Oil Operator | Dec 2023 |
| 30 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | May 2024 |
| 31 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | May 2022 |
| 32 | Equinox Oil Company | Plainville, KS 67663 | Oil & Gas Operator | Jan 2024 |
| 33 | Eroc Gathering Company, LP | | Oil Operator | Jul 2014 |
| 34 | Et Gathering & Processing LLC | San Antonio, TX 78258 | Oil Operator | Dec 2023 |
| 35 | Etc Field Services LLC | San Antonio, TX 78258 | Oil Operator | Jun 2018 |
| 36 | Etc Texas Pipeline, LTD. | San Antonio, TX 78258 | Oil Operator | Sep 2023 |
| 37 | Ettco Enterprises, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2023 |
| 38 | Evans Brothers | | Oil & Gas Operator | Jan 2024 |
| 39 | Excalibur Resources, Inc. | | Oil & Gas Operator | Apr 1986 |
| 40 | Excel Oil & Gas, Inc. | Waxahachie, TX 75168 | Oil & Gas Operator | May 2024 |
| 41 | Excel Royalty Company, LLC | | Oil Operator | Jun 2022 |
| 42 | Exco Operating Company, LP | Dallas, TX 75251 | Oil & Gas Operator | May 2024 |
| 43 | Exco Partners Operating PTSHP LP | Dallas, TX 75251 | Oil & Gas Operator | Jan 2009 |
| 44 | Exco Production Company, LP | Dallas, TX 75251 | Oil & Gas Operator | Dec 2009 |
| 45 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Jan 2024 |
| 46 | Exco/Hgi JV Assets, LLC | Dallas, TX 75251 | Oil & Gas Operator | Jun 2014 |