| 1401 | East Texas Exploration, LLC | Edmond, OK 73003 | Oil & Gas Operator | Sep 2019 |
| 1402 | Eastern Oil Corporation | Houston, TX 77070 | Oil & Gas Operator | Feb 2026 |
| 1403 | Eclipse Petroleum Corporation | La Grange, TX 78945 | Oil & Gas Operator | Aug 2003 |
| 1404 | Eclipse Services, Inc. * | La Grange, TX 78945 | Oil & Gas Operator | Jul 2003 |
| 1405 | Ed I. Estis | | Oil & Gas Operator | Sep 1998 |
| 1406 | Ed Shea | | Oil Operator | Sep 1990 |
| 1407 | Eddie Mayo | | Oil Operator | Jun 2006 |
| 1408 | Eddy Enterprises, Inc. | | Oil & Gas Operator | Sep 2023 |
| 1409 | Edge Petroleum Oper. Co., Inc. | Houston, TX 77042 | Oil & Gas Operator | Nov 2010 |
| 1410 | Edgewater Oil Co. Inc. | | Oil & Gas Operator | Jul 1995 |
| 1411 | Edgewood Exploration Inc. | | Oil & Gas Operator | Mar 1993 |
| 1412 | Edisto Resources Corporation | Houston, TX 77057 | Oil & Gas Operator | Oct 1999 |
| 1413 | Edward I. Estis, SR. | | Oil & Gas Operator | Aug 1991 |
| 1414 | Edward Oil Company | Youngsville, PA 16371 | Oil & Gas Operator | Nov 2024 |
| 1415 | Edwards & Leach Oil Company | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2005 |
| 1416 | Edwin L Cox & Berry R Cox-Eni | | Oil & Gas Operator | May 1986 |
| 1417 | Edwin L Cox-Michael Halbouty | | Oil & Gas Operator | Jun 1986 |
| 1418 | Edwin L. Cox | | Oil & Gas Operator | May 1986 |
| 1419 | Edwin L. Cox & Berry R. Cox | | Oil & Gas Operator | Jun 1986 |
| 1420 | Edwin S. Malmed | | Gas Operator | Dec 2002 |
| 1421 | Eex Corporation | Houston, TX 77060 | Oil & Gas Operator | Feb 2000 |
| 1422 | Eex E&P Company, L.P. | Houston, TX 77060 | Oil & Gas Operator | Jul 2003 |
| 1423 | Egh Operating, LLC | | Oil & Gas Operator | Dec 2024 |
| 1424 | Eidos Energy, Inc. | | Oil & Gas Operator | Oct 2017 |
| 1425 | Ekberg-Sinclair & Associates | | Oil & Gas Operator | Jan 1991 |
| 1426 | El Paso E&P Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2013 |
| 1427 | El Paso Exploration Company | | Oil & Gas Operator | Jul 1985 |
| 1428 | El Paso Field Services Company | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 1429 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 1430 | El Paso Production Gom, Inc. | | Oil & Gas Operator | Nov 2005 |
| 1431 | El Toro Production Co Inc | | Oil & Gas Operator | Jan 2016 |
| 1432 | El Tres Petr. Corp. | | Oil & Gas Operator | Jan 1984 |
| 1433 | El-Oil, LTD. | | Oil & Gas Operator | Nov 2024 |
| 1434 | Elad Petroleum Corporation | | Oil Operator | Jun 2005 |
| 1435 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Dec 2025 |
| 1436 | Eldon Radke | | Oil Operator | May 2001 |
| 1437 | Eldorado Gas Inc. | | Oil & Gas Operator | May 1986 |
| 1438 | Eleuterius Company | | Oil Operator | Jan 1983 |
| 1439 | Elf Aquitaine Inc | Houston, TX 77002 | Oil & Gas Operator | May 1991 |
| 1440 | Elf Aquitaine Operating, Inc. | | Oil & Gas Operator | Jan 1992 |
| 1441 | Elfco, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Jun 1996 |
| 1442 | Elgie Company, Inc. | | Oil & Gas Operator | Aug 1993 |
| 1443 | Elgin Energy Corp. | | Oil Operator | May 1995 |
| 1444 | Eli Rebich | | Oil & Gas Operator | Dec 1986 |
| 1445 | Elizabeth Oil Company | | Oil Operator | Oct 1999 |
| 1446 | Elliott Oil & Gas Company | The Woodlands, TX 77380 | Oil & Gas Operator | Sep 2006 |
| 1447 | Ellis M. Moore, Et Al | | Oil Operator | Mar 1986 |
| 1448 | Ellora Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Feb 2026 |
| 1449 | Ellora Operating, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2011 |
| 1450 | Elmwood Operating LLC | | Oil & Gas Operator | Jun 2024 |
| 1451 | Elsbury & Acker | | Oil & Gas Operator | Feb 2003 |
| 1452 | Elsbury & McGrew | | Oil & Gas Operator | Nov 1986 |
| 1453 | Elysium Energy, L.L.C | Denver, CO 80202 | Oil & Gas Operator | Jun 2019 |
| 1454 | Elysium Jennings, LLC | | Oil & Gas Operator | Dec 2024 |
| 1455 | Emerald Oil Co. | | Oil & Gas Operator | Apr 1980 |
| 1456 | Emerald Oil Company, L.L.C. | E. Rochester, NY 14445 | Oil & Gas Operator | Jan 2025 |
| 1457 | Emerge Operating, LLC | | Oil & Gas Operator | Nov 2025 |
| 1458 | Empire Land Corporation | New Orleans, LA 70130 | Oil & Gas Operator | Nov 2014 |
| 1459 | Empire Louisiana LLC Of Delaware | | Oil & Gas Operator | Dec 2024 |
| 1460 | Empresa Energy IV, LLC | | Oil & Gas Operator | Aug 2019 |
| 1461 | Empresa Energy, LP | Houston, TX 77024 | Oil & Gas Operator | Jul 2009 |
| 1462 | Empresa Operating, LLC | | Oil & Gas Operator | Dec 2024 |
| 1463 | Enable Midstream Partners, LP | Oklahoma City, OK 73124 | Oil Operator | Sep 2023 |
| 1464 | Enbridge Offshore Pipelines(Seacrest) LP | | Oil Operator | Oct 2009 |
| 1465 | Enbridge P/LS (La Intra.)L.L.C. | | Oil Operator | Oct 2009 |
| 1466 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 1467 | Enco Resources Inc. | Kingwood, TX 77325 | Oil & Gas Operator | Feb 2026 |
| 1468 | Encore Operating Louisiana, LLC | | Oil & Gas Operator | Dec 2010 |
| 1469 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Nov 2025 |
| 1470 | Endeavor Natural Gas, LP | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 1471 | Endurance Oil & Gas, Inc. | Minden, LA 71055 | Oil & Gas Operator | Feb 2026 |
| 1472 | Endurance Operating LLC | | Oil & Gas Operator | Dec 2024 |
| 1473 | Enduro Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2018 |
| 1474 | Enerco Exploration & MGMT. Co. | | Oil & Gas Operator | Aug 1981 |
| 1475 | Enercorp Resources, Inc. | Houston, TX 77027 | Oil & Gas Operator | Dec 1993 |
| 1476 | Enerfin Field Services LLC | Houston, TX 77077 | Oil Operator | Nov 2024 |
| 1477 | Energen Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2021 |
| 1478 | Energen Resources Maq Inc | Birmingham, AL 35203 | Oil & Gas Operator | Sep 2000 |
| 1479 | Energy Corp. Of America, Inc. | | Oil & Gas Operator | Aug 1998 |
| 1480 | Energy Development Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2024 |
| 1481 | Energy Exploration Co | | Oil & Gas Operator | Feb 1991 |
| 1482 | Energy Finders, Inc. | | Oil & Gas Operator | Dec 1981 |
| 1483 | Energy Investments Inc. | | Oil & Gas Operator | Oct 2025 |
| 1484 | Energy Management Company Of Texas | | Oil & Gas Operator | Dec 2024 |
| 1485 | Energy Management Corp. | | Oil & Gas Operator | Apr 1999 |
| 1486 | Energy Oil & Gas Corporation | Austin, TX 78746 | Oil & Gas Operator | Feb 2026 |
| 1487 | Energy Partners, LTD. | New Orleans, LA 70170 | Oil & Gas Operator | Aug 2012 |
| 1488 | Energy Prod Management Corp | | Oil & Gas Operator | Oct 1991 |
| 1489 | Energy Production Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 1490 | Energy Program Accompany | | Oil Operator | Dec 2006 |
| 1491 | Energy Properties Inc. | | Oil & Gas Operator | Dec 2023 |
| 1492 | Energy Prospector'S Inc | | Oil & Gas Operator | Jun 1997 |
| 1493 | Energy Recovery Group LLC | | Oil & Gas Operator | Jul 2008 |
| 1494 | Energy Research & Dev. Corp. | | Oil & Gas Operator | Feb 1998 |
| 1495 | Energy Reserves GP-Kanaba Oil | | Oil & Gas Operator | Aug 1985 |
| 1496 | Energy Reserves Group | Houston, TX 770563020 | Oil & Gas Operator | Apr 1996 |
| 1497 | Energy Reserves Group LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2018 |
| 1498 | Energy Resource Associates Inc | | Gas Operator | Nov 1988 |
| 1499 | Energy Resource Technology Gom, LLC | | Oil & Gas Operator | Oct 2019 |
| 1500 | Energy Resources Of Amer Inc | Columbiana, OH 44408 | Oil & Gas Operator | Dec 2021 |