| 1401 | Elizabeth Oil Company | | Oil Operator | Oct 1999 |
| 1402 | Elliott Oil & Gas Company | The Woodlands, TX 77380 | Oil & Gas Operator | Sep 2006 |
| 1403 | Ellis M. Moore, Et Al | | Oil Operator | Mar 1986 |
| 1404 | Ellora Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | May 2025 |
| 1405 | Ellora Operating, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2011 |
| 1406 | Elmwood Operating LLC | | Oil & Gas Operator | Jun 2024 |
| 1407 | Elsbury & Acker | | Oil & Gas Operator | Feb 2003 |
| 1408 | Elsbury & McGrew | | Oil & Gas Operator | Nov 1986 |
| 1409 | Elysium Energy, L.L.C. | Denver, CO 80202 | Oil & Gas Operator | Jun 2019 |
| 1410 | Elysium Jennings, LLC | | Oil & Gas Operator | Dec 2024 |
| 1411 | Emerald Oil Co. | | Oil & Gas Operator | Apr 1980 |
| 1412 | Emerald Oil Company, L.L.C. | E. Rochester, NY 14445 | Oil & Gas Operator | Jan 2025 |
| 1413 | Emerge Operating, LLC | | Oil & Gas Operator | Mar 2025 |
| 1414 | Empire Land Corporation | New Orleans, LA 70130 | Oil & Gas Operator | Nov 2014 |
| 1415 | Empire Louisiana LLC Of Delaware | | Oil & Gas Operator | Dec 2024 |
| 1416 | Empresa Energy IV, LLC | | Oil & Gas Operator | Aug 2019 |
| 1417 | Empresa Energy, LP | Houston, TX 77024 | Oil & Gas Operator | Jul 2009 |
| 1418 | Empresa Operating, LLC | | Oil & Gas Operator | Dec 2024 |
| 1419 | Enable Midstream Partners, LP | Oklahoma City, OK 73124 | Oil Operator | Sep 2023 |
| 1420 | Enbridge Offshore Pipelines(Seacrest) LP | | Oil Operator | Oct 2009 |
| 1421 | Enbridge P/LS (La Intra.)L.L.C. | | Oil Operator | Oct 2009 |
| 1422 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 1423 | Enco Resources Inc. | Kingwood, TX 77325 | Oil & Gas Operator | May 2025 |
| 1424 | Encore Operating Louisiana, LLC | | Oil & Gas Operator | Dec 2010 |
| 1425 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 1426 | Endeavor Natural Gas, LP | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 1427 | Endurance Oil & Gas, Inc. | Minden, LA 71055 | Oil & Gas Operator | May 2025 |
| 1428 | Endurance Operating LLC | | Oil & Gas Operator | Dec 2024 |
| 1429 | Enduro Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2018 |
| 1430 | Enerco Exploration & MGMT. Co. | | Oil & Gas Operator | Aug 1981 |
| 1431 | Enercorp Resources, Inc. | Houston, TX 77027 | Oil & Gas Operator | Dec 1993 |
| 1432 | Enerfin Field Services LLC | Houston, TX 77077 | Oil Operator | Nov 2024 |
| 1433 | Energen Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2021 |
| 1434 | Energen Resources Maq Inc | Birmingham, AL 35203 | Oil & Gas Operator | Sep 2000 |
| 1435 | Energy Corp. Of America, Inc. | | Oil & Gas Operator | Aug 1998 |
| 1436 | Energy Development Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2024 |
| 1437 | Energy Exploration Company | | Oil & Gas Operator | Feb 1991 |
| 1438 | Energy Finders, Inc. | | Oil & Gas Operator | Dec 1981 |
| 1439 | Energy Investments Inc | | Oil & Gas Operator | Feb 2025 |
| 1440 | Energy Management Company Of Texas | | Oil & Gas Operator | Dec 2024 |
| 1441 | Energy Management Corp. | | Oil & Gas Operator | Apr 1999 |
| 1442 | Energy Oil & Gas Corporation | Austin, TX 78746 | Oil & Gas Operator | May 2025 |
| 1443 | Energy Partners, LTD. | New Orleans, LA 70170 | Oil & Gas Operator | Aug 2012 |
| 1444 | Energy Prod Management Corp | | Oil & Gas Operator | Oct 1991 |
| 1445 | Energy Production Corporation | Kilgore, TX 75663 | Oil & Gas Operator | May 2025 |
| 1446 | Energy Program Accompany | | Oil Operator | Dec 2006 |
| 1447 | Energy Properties Inc. | | Oil & Gas Operator | Dec 2023 |
| 1448 | Energy Prospector'S Inc | | Oil & Gas Operator | Jun 1997 |
| 1449 | Energy Recovery Group, LLC | | Oil & Gas Operator | Jul 2008 |
| 1450 | Energy Research & Dev. Corp. | | Oil & Gas Operator | Feb 1998 |
| 1451 | Energy Reserves GP-Kanaba Oil | | Oil & Gas Operator | Aug 1985 |
| 1452 | Energy Reserves Group | Houston, TX 770563020 | Oil & Gas Operator | Apr 1996 |
| 1453 | Energy Reserves Group LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2018 |
| 1454 | Energy Resource Associates Inc | | Gas Operator | Nov 1988 |
| 1455 | Energy Resource Technology Gom, LLC | | Oil & Gas Operator | Oct 2019 |
| 1456 | Energy Resources Of Amer Inc | Columbiana, OH 44408 | Oil & Gas Operator | Dec 2021 |
| 1457 | Energy Resources Oil & Gas Corp. | Amarillo, TX 79102 | Oil & Gas Operator | Jun 1994 |
| 1458 | Energy RSRVS GRP-Lavino-Traver | | Oil & Gas Operator | Aug 1985 |
| 1459 | Energy Self-Service Oils, Inc. | | Oil & Gas Operator | Apr 2009 |
| 1460 | Energy Source, Inc.-Emerald | | Oil & Gas Operator | Apr 1983 |
| 1461 | Energy Sources, Inc. | | Oil & Gas Operator | Nov 1990 |
| 1462 | Energy Xxi Gom, LLC | | Oil & Gas Operator | Dec 2023 |
| 1463 | Energy Xxi Gulf Coast, Inc. | | Oil & Gas Operator | Dec 2008 |
| 1464 | Energy Xxi Onshore, LLC | | Oil & Gas Operator | Dec 2023 |
| 1465 | Energyquest II, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Feb 2025 |
| 1466 | Energyquest Management, LLC | Houston, TX 77090 | Oil & Gas Operator | Apr 2021 |
| 1467 | Energyquest Operating, L.L.C. | | Oil & Gas Operator | Jun 2023 |
| 1468 | Enerquest Oil & Gas LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Feb 2025 |
| 1469 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 1470 | Enervest Production Partners, LTD. | | Gas Operator | Nov 2024 |
| 1471 | Enex Resources Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2009 |
| 1472 | Engeo Co. | | Oil & Gas Operator | Nov 1986 |
| 1473 | English Oil & Gas | | Oil Operator | Sep 2021 |
| 1474 | English Oil And Gas, L.L.C. | | Oil Operator | Sep 2021 |
| 1475 | Enlink Lig, LLC | | Oil Operator | Jan 2025 |
| 1476 | Ennex, Inc. | | Oil & Gas Operator | Oct 1993 |
| 1477 | Enpower Resources Inc. | Sugar Land, TX 77479 | Oil & Gas Operator | May 2025 |
| 1478 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 1479 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 1480 | Ensight Energy Management, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2005 |
| 1481 | Ensight III Energy MGMT, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2008 |
| 1482 | Ensight IV Energy Management,LLC | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2024 |
| 1483 | Ensight Resources, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2001 |
| 1484 | Ensource Inc | Midland, TX 79705 | Oil & Gas Operator | Aug 1998 |
| 1485 | Enstar Petroleum Company | | Oil & Gas Operator | Aug 1985 |
| 1486 | Enstar Petroleum Inc | | Oil & Gas Operator | Apr 1985 |
| 1487 | Enterprise Gathering LLC | | Oil Operator | Dec 2024 |
| 1488 | Enterprise Resources Inc. | | Oil & Gas Operator | Jun 1979 |
| 1489 | Entex Petroleum, Inc. | Oklahoma City, OK 73113 | Oil & Gas Operator | Nov 1997 |
| 1490 | Entex, Inc. | | Oil & Gas Operator | Dec 1984 |
| 1491 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 1492 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | May 2022 |
| 1493 | EP Operating Co, A LTD Ptrship | | Oil & Gas Operator | Oct 1992 |
| 1494 | EP Operating Co. | Dallas, TX 75201 | Oil & Gas Operator | Jan 1993 |
| 1495 | EP&W | | Oil Operator | Dec 1997 |
| 1496 | Epl Oil & Gas, Inc | | Oil & Gas Operator | Aug 2015 |
| 1497 | Epoch Petroleum Corporation | | Oil & Gas Operator | Dec 1992 |
| 1498 | Equinox Oil Company | Plainville, KS 67663 | Oil & Gas Operator | Dec 2024 |
| 1499 | Equipment, Inc. | | Oil & Gas Operator | Mar 1983 |
| 1500 | Equitable Petroleum Corp. | | Oil & Gas Operator | Jan 1999 |