| 1 | E & W Production | Olney, TX 76374 | Oil & Gas Operator | Aug 2018 |
| 2 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Dec 2024 |
| 3 | Eagleridge Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Dec 2024 |
| 4 | Echo Production Inc | Graham, TX 76450 | Oil & Gas Operator | Dec 2024 |
| 5 | Edge Exploration, Inc. | Graham, TX 76450 | Oil & Gas Operator | Mar 2006 |
| 6 | Edge, Fred Well Service Co. | Archer City, TX 76351 | Oil & Gas Operator | May 2024 |
| 7 | Eldorado Oil And Gas, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Nov 1995 |
| 8 | Ellard Oil | Loving, TX 76460 | Oil & Gas Operator | May 2022 |
| 9 | Ellard, Herman | Graham, TX 76450 | Oil & Gas Operator | Feb 2005 |
| 10 | Ellis, Amon | Olney, TX 76374 | Oil & Gas Operator | Aug 2003 |
| 11 | Embassy Oil Company | Highland VLG, TX 75077 | Oil & Gas Operator | Dec 2024 |
| 12 | Emco Oil & Gas | Graham, TX 76450 | Oil & Gas Operator | Dec 1995 |
| 13 | Emco Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2002 |
| 14 | Energy Group Of America, Inc. | Hollister, MO 65672 | Oil Operator | Dec 2024 |
| 15 | Energy Resource & Develop., Corp | Rockwall, TX 75087 | Oil & Gas Operator | Jun 1998 |
| 16 | Energy Transfer Crude Marketing LLC | Houston, TX 77002 | Oil Operator | Sep 2024 |
| 17 | Energy Transfer Fuel, LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2005 |
| 18 | Energypro, Inc. | Magnolia, TX 77354 | Oil & Gas Operator | Dec 2024 |
| 19 | Enr Operating, LLC | Eunice, NM 88231 | Oil & Gas Operator | Dec 2024 |
| 20 | Enre Corp. | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2005 |
| 21 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2024 |
| 22 | Ericksen, W.R. | Hobbs, NM 88240 | Oil & Gas Operator | Nov 1993 |
| 23 | Ernmar Investments, Inc. | Edmond, OK 73083 | Oil & Gas Operator | Dec 2024 |
| 24 | Erwin Operating | Graham, TX 76450 | Oil & Gas Operator | Dec 2024 |
| 25 | Escoba Royalty Corporation | San Antonio, TX 78217 | Oil & Gas Operator | Nov 2005 |
| 26 | Esg Resources LLC | Dallas, TX 75231 | Oil & Gas Operator | Dec 2024 |
| 27 | Esna Operating Co., Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Oct 1994 |
| 28 | Eurotex Royalty, Inc. | Arlington, TX 76012 | Oil & Gas Operator | Aug 2003 |
| 29 | Evans, Carl N. | Graham, TX 76450 | Oil & Gas Operator | Feb 2001 |
| 30 | Evantech Energy Corp. | Fort Worth, TX 76120 | Oil & Gas Operator | Apr 1995 |
| 31 | Excel Oil & Gas, Inc. | Waxahachie, TX 75168 | Oil & Gas Operator | Dec 2024 |
| 32 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Sep 2024 |
| 33 | Exorare Energy, Inc. | Dallas, TX 75218 | Oil & Gas Operator | Dec 2024 |
| 34 | Exp, Inc. | Dallas, TX 75244 | Oil & Gas Operator | May 2003 |
| 35 | Expro Engineering, Inc. | Fort Worth, TX 76179 | Oil & Gas Operator | Dec 2024 |