| 1501 | Energy Resources Oil & Gas Corp. | Amarillo, TX 79102 | Oil & Gas Operator | Jun 1994 |
| 1502 | Energy RSRVS GRP-Lavino-Traver | | Oil & Gas Operator | Aug 1985 |
| 1503 | Energy Self-Service Oils, Inc. | | Oil & Gas Operator | Apr 2009 |
| 1504 | Energy Source, Inc.-Emerald | | Oil & Gas Operator | Apr 1983 |
| 1505 | Energy Sources, Inc. | | Oil & Gas Operator | Nov 1990 |
| 1506 | Energy Xxi Gom, LLC | | Oil & Gas Operator | Dec 2023 |
| 1507 | Energy Xxi Gulf Coast, Inc. | | Oil & Gas Operator | Dec 2008 |
| 1508 | Energy Xxi Onshore, LLC | | Oil & Gas Operator | Dec 2023 |
| 1509 | Energyquest II, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Nov 2025 |
| 1510 | Energyquest Management, LLC | Houston, TX 77090 | Oil & Gas Operator | Apr 2021 |
| 1511 | Energyquest Operating, L.L.C. | | Oil & Gas Operator | Jun 2023 |
| 1512 | Enerquest Oil & Gas LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Nov 2025 |
| 1513 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 1514 | Enervest Production Partners, LTD. | | Gas Operator | Nov 2024 |
| 1515 | Enex Resources Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2009 |
| 1516 | Engeo Co. | | Oil & Gas Operator | Nov 1986 |
| 1517 | English Oil & Gas | | Oil Operator | Sep 2021 |
| 1518 | English Oil And Gas, L.L.C. | | Oil Operator | Sep 2021 |
| 1519 | Enlink Lig, LLC | | Oil Operator | Jan 2025 |
| 1520 | Ennex Inc | | Oil & Gas Operator | Oct 1993 |
| 1521 | Enpower Resources Inc. | Sugar Land, TX 77479 | Oil & Gas Operator | Feb 2026 |
| 1522 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 1523 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 1524 | Ensight Energy Management, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2005 |
| 1525 | Ensight III Energy MGMT, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2008 |
| 1526 | Ensight IV Energy Management,LLC | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2024 |
| 1527 | Ensight Resources, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2001 |
| 1528 | Ensource Inc | Midland, TX 79705 | Oil & Gas Operator | Aug 1998 |
| 1529 | Enstar Petroleum Company | | Oil & Gas Operator | Aug 1985 |
| 1530 | Enstar Petroleum, Inc. | | Oil & Gas Operator | Jan 1984 |
| 1531 | Enterprise Gathering LLC | | Oil Operator | Dec 2024 |
| 1532 | Enterprise Resources Inc. | | Oil & Gas Operator | Jun 1979 |
| 1533 | Entex Petroleum Inc | Oklahoma City, OK 73113 | Oil & Gas Operator | Nov 1997 |
| 1534 | Entex, Inc. | | Oil & Gas Operator | Dec 1984 |
| 1535 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 1536 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | Jan 2023 |
| 1537 | EP Operating Co, A LTD Ptrship | | Oil & Gas Operator | Oct 1992 |
| 1538 | EP Operating Co. | Dallas, TX 75201 | Oil & Gas Operator | Jan 1993 |
| 1539 | EP&W | | Oil Operator | Dec 1997 |
| 1540 | Epl Oil & Gas, Inc | | Oil & Gas Operator | Aug 2015 |
| 1541 | Epoch Petroleum Corporation | | Oil & Gas Operator | Dec 1992 |
| 1542 | Equinox Oil Company Inc | Plainville, KS 67663 | Oil & Gas Operator | Dec 2019 |
| 1543 | Equipment, Inc. | | Oil & Gas Operator | Mar 1983 |
| 1544 | Equitable Petroleum Corp. | | Oil & Gas Operator | Jan 1999 |
| 1545 | Equity Monroe Associates | | Gas Operator | Nov 1990 |
| 1546 | Equity Monroe Partners | | Gas Operator | Nov 1990 |
| 1547 | Eram, Inc. | | Oil & Gas Operator | Dec 2024 |
| 1548 | Ereunao Oil & Gas, Inc. | | Oil & Gas Operator | Mar 2003 |
| 1549 | Ergon Exploration, Inc. | | Oil & Gas Operator | Jun 2023 |
| 1550 | Ergon, Inc. | | Oil & Gas Operator | Dec 2005 |
| 1551 | Erin Exploration Associates | | Oil & Gas Operator | Mar 1987 |
| 1552 | Ernest Starkey, Jr. | | Oil & Gas Operator | Feb 1985 |
| 1553 | Eroc Gathering Company, LP | | Oil Operator | Jul 2014 |
| 1554 | Erskine Energy, LLC | H SPG NTL PK, AR 71909 | Oil & Gas Operator | Feb 2026 |
| 1555 | Erskine Operating LLC | Houston, TX 77079 | Oil & Gas Operator | Dec 2007 |
| 1556 | Erwin W. Saye | | Oil & Gas Operator | Apr 1979 |
| 1557 | Esquire Oil And Gas LLC | | Oil & Gas Operator | Jan 2011 |
| 1558 | Essex Corporation | | Oil Operator | Jan 1983 |
| 1559 | Essex Corporation Of Louisiana | | Oil Operator | Dec 1997 |
| 1560 | Est Of WM G Helis (A Partnership) | | Oil & Gas Operator | Dec 2009 |
| 1561 | Est. Of H. L. Hunt | | Oil & Gas Operator | Jun 1983 |
| 1562 | Estate Oil & Gas Corp. | Dallas, TX 75206 | Oil & Gas Operator | Oct 2011 |
| 1563 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 1564 | Etc Field Services LLC | San Antonio, TX 78258 | Oil Operator | Jun 2018 |
| 1565 | Etc Oil Corp | | Oil & Gas Operator | Mar 1994 |
| 1566 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 1567 | Etd Oil Co. | | Oil Operator | Oct 1990 |
| 1568 | Ethredge & Rhoads Oil Company | | Oil Operator | Dec 2012 |
| 1569 | Ethredge Oil Company | | Oil & Gas Operator | Aug 1998 |
| 1570 | Ethyl Gas Company, LLC | | Oil Operator | Jan 2025 |
| 1571 | Ethyl Properties Inc | | Oil & Gas Operator | Aug 1989 |
| 1572 | Ethyl-Buchanan | | Oil & Gas Operator | Feb 1987 |
| 1573 | Etoco Incorporated | Houston, TX 77002 | Oil & Gas Operator | May 2005 |
| 1574 | Etoco, L.P. | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 1575 | Ettco Enterprises, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2024 |
| 1576 | Eucutta Petroleum Inc. | | Oil & Gas Operator | Sep 2000 |
| 1577 | Eugene Talbert Operating Co. | | Oil & Gas Operator | Mar 2013 |
| 1578 | Euroamerican Energy Group, Inc | | Oil & Gas Operator | Oct 1993 |
| 1579 | Eurovest Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 1580 | Evangeline Natural Resources, LLC | | Oil & Gas Operator | Jan 2025 |
| 1581 | Evangeline Oil Prod. Co., Inc. | | Oil Operator | Apr 2001 |
| 1582 | Evangeline Operating Co., Inc. | | Oil Operator | Jun 1989 |
| 1583 | Evangeline Pumpers, Inc. | | Oil & Gas Operator | Jul 2005 |
| 1584 | Evans Brothers | | Oil & Gas Operator | Jan 2025 |
| 1585 | Evergreen Operating Co., LTD. | McAllen, TX 78502 | Oil & Gas Operator | Feb 2026 |
| 1586 | Excalibur Operating, LLC | | Oil & Gas Operator | Nov 2024 |
| 1587 | Excalibur Resources, Inc. | | Oil & Gas Operator | Apr 1986 |
| 1588 | Excel Oil & Gas, Inc. | Waxahachie, TX 75168 | Oil & Gas Operator | Feb 2026 |
| 1589 | Excel Operating Corporation | | Oil & Gas Operator | Dec 2024 |
| 1590 | Excel Royalty Company, LLC | | Oil Operator | Jun 2022 |
| 1591 | Excelsior Oil Corporation | | Oil & Gas Operator | May 1985 |
| 1592 | Exchange Expl & Prodn Co | | Oil Operator | Oct 2023 |
| 1593 | Exchange Oil & Gas Company | | Oil & Gas Operator | Oct 1996 |
| 1594 | Exchange Oil & Gas Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1987 |
| 1595 | Exco Operating Company, LP | Dallas, TX 75251 | Oil & Gas Operator | Feb 2026 |
| 1596 | Exco Partners Operating PTSHP LP | Dallas, TX 75251 | Oil & Gas Operator | Jan 2009 |
| 1597 | Exco Production Company, LP | Dallas, TX 75251 | Oil & Gas Operator | Dec 2009 |
| 1598 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Nov 2025 |
| 1599 | Exco/Hgi JV Assets, LLC | Dallas, TX 75251 | Oil & Gas Operator | Jun 2014 |
| 1600 | Exodus Energy, Inc. | Huntington Beach, CA 92615 | Oil & Gas Operator | Jul 2018 |