| 1501 | Eram, Inc. | | Oil & Gas Operator | Dec 2024 |
| 1502 | Ereunao Oil & Gas, Inc. | | Oil & Gas Operator | Mar 2003 |
| 1503 | Ergon Exploration, Inc. | | Oil & Gas Operator | Jun 2023 |
| 1504 | Ergon, Inc. | | Oil & Gas Operator | Dec 2005 |
| 1505 | Erin Exploration Associates | | Oil & Gas Operator | Mar 1987 |
| 1506 | Ernest Starkey, Jr. | | Oil & Gas Operator | Feb 1985 |
| 1507 | Eroc Gathering Company, LP | | Oil Operator | Jul 2014 |
| 1508 | Erskine Energy, LLC | H SPG NTL PK, AR 71909 | Oil & Gas Operator | May 2025 |
| 1509 | Erskine Operating LLC | Houston, TX 77079 | Oil & Gas Operator | Dec 2007 |
| 1510 | Erwin W. Saye | | Oil & Gas Operator | Apr 1979 |
| 1511 | Esquire Oil And Gas LLC | | Oil & Gas Operator | Jan 2011 |
| 1512 | Essex Corporation | | Oil Operator | Jan 1983 |
| 1513 | Essex Corporation Of Louisiana | | Oil Operator | Dec 1997 |
| 1514 | Est Of WM G Helis (A Partnership) | | Oil & Gas Operator | Dec 2009 |
| 1515 | Est. Of H. L. Hunt | | Oil & Gas Operator | Jun 1983 |
| 1516 | Estate Oil & Gas Corp. | Dallas, TX 75206 | Oil & Gas Operator | Oct 2011 |
| 1517 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 1518 | Etc Field Services LLC | San Antonio, TX 78258 | Oil Operator | Jun 2018 |
| 1519 | Etc Oil Corp | | Oil & Gas Operator | Mar 1994 |
| 1520 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 1521 | Etd Oil Co. | | Oil Operator | Oct 1990 |
| 1522 | Ethredge & Rhoads Oil Company | | Oil Operator | Dec 2012 |
| 1523 | Ethredge Oil Company | | Oil & Gas Operator | Aug 1998 |
| 1524 | Ethyl Gas Company, LLC | | Oil Operator | Jan 2025 |
| 1525 | Ethyl Properties Inc. | | Oil & Gas Operator | Aug 1989 |
| 1526 | Ethyl-Buchanan | | Oil & Gas Operator | Feb 1987 |
| 1527 | Etoco Incorporated | Houston, TX 77002 | Oil & Gas Operator | May 2005 |
| 1528 | Etoco, L.P. | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 1529 | Ettco Enterprises, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2024 |
| 1530 | Eucutta Petroleum Inc. | | Oil & Gas Operator | Sep 2000 |
| 1531 | Eugene Talbert Operg. Co. Inc. | | Oil & Gas Operator | Mar 2013 |
| 1532 | Euroamerican Energy Group Inc | | Oil & Gas Operator | Oct 1993 |
| 1533 | Eurovest Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 1534 | Evangeline Natural Resources, LLC | | Oil & Gas Operator | Jan 2025 |
| 1535 | Evangeline Oil Prod. Co., Inc. | | Oil Operator | Apr 2001 |
| 1536 | Evangeline Operating Co., Inc. | | Oil Operator | Jun 1989 |
| 1537 | Evangeline Pumpers, Inc. | | Oil & Gas Operator | Jul 2005 |
| 1538 | Evans Brothers | | Oil & Gas Operator | Jan 2025 |
| 1539 | Evergreen Operating Co., LTD. | McAllen, TX 78502 | Oil & Gas Operator | May 2025 |
| 1540 | Excalibur Operating, LLC | | Oil & Gas Operator | Nov 2024 |
| 1541 | Excalibur Resources, Inc. | | Oil & Gas Operator | Apr 1986 |
| 1542 | Excel Oil & Gas, Inc. | Waxahachie, TX 75168 | Oil & Gas Operator | May 2025 |
| 1543 | Excel Operating Corporation | | Oil & Gas Operator | Dec 2024 |
| 1544 | Excel Royalty Company, LLC | | Oil Operator | Jun 2022 |
| 1545 | Excelsior Oil Corporation | | Oil & Gas Operator | May 1985 |
| 1546 | Exchange Expl & Prodn Co | | Oil Operator | Oct 2023 |
| 1547 | Exchange Oil & Gas Company | | Oil & Gas Operator | Oct 1996 |
| 1548 | Exchange Oil & Gas Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1987 |
| 1549 | Exco Operating Company, LP | Dallas, TX 75251 | Oil & Gas Operator | May 2025 |
| 1550 | Exco Partners Operating PTSHP LP | Dallas, TX 75251 | Oil & Gas Operator | Jan 2009 |
| 1551 | Exco Production Company, LP | Dallas, TX 75251 | Oil & Gas Operator | Dec 2009 |
| 1552 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Feb 2025 |
| 1553 | Exco/Hgi JV Assets, LLC | Dallas, TX 75251 | Oil & Gas Operator | Jun 2014 |
| 1554 | Exodus Energy, Inc. | | Oil & Gas Operator | Jul 2018 |
| 1555 | Exoro Energy, L.L.C. | | Oil & Gas Operator | Jun 2021 |
| 1556 | Expando Production Co. | | Oil & Gas Operator | Oct 1988 |
| 1557 | Expert Oil & Gas, L.L.C. | | Oil & Gas Operator | Nov 2024 |
| 1558 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | May 2025 |
| 1559 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 1560 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | May 2025 |
| 1561 | F & F Drilling Company | | Oil Operator | Apr 1991 |
| 1562 | F & H Production | | Oil & Gas Operator | Apr 2014 |
| 1563 | F H Walsh Jr Operating Co Inc | | Oil & Gas Operator | Jul 1995 |
| 1564 | F Howard Walsh Jr | | Oil & Gas Operator | Aug 1992 |
| 1565 | F R Etchen, Jr | | Oil & Gas Operator | Sep 1985 |
| 1566 | F W Rabalais, Inc. | | Oil & Gas Operator | Dec 2014 |
| 1567 | F. E. Hargraves | | Oil Operator | Mar 1983 |
| 1568 | F.A.S. Environmental Services, L.L.C. | | Oil Operator | Jan 2025 |
| 1569 | F.E.Hargraves &Sons DRL.Co.Inc. | | Oil & Gas Operator | Mar 1992 |
| 1570 | F.S.M. Oil Co. | | Oil Operator | Aug 1979 |
| 1571 | Fair Oil Company | Tyler, TX 75710 | Oil & Gas Operator | Dec 2000 |
| 1572 | Fair Oil, LC | Tyler, TX 75710 | Oil & Gas Operator | Oct 2001 |
| 1573 | Fair Oil, LTD. | Tyler, TX 75710 | Oil & Gas Operator | May 2025 |
| 1574 | Fairfield Energy Corp. | Dallas, TX 75205 | Oil & Gas Operator | May 2025 |
| 1575 | Fairview Producing Corp. | | Oil Operator | Jul 2001 |
| 1576 | Fairway Resources Operating, LLC | Southlake, TX 76092 | Oil & Gas Operator | Aug 2022 |
| 1577 | Faith Energy, L.L.C. | | Oil & Gas Operator | Jan 2025 |
| 1578 | Faith Oil Of Hosston | | Oil Operator | Feb 1996 |
| 1579 | Falco S & D, Inc. | Shreveport, LA 71107 | Oil & Gas Operator | Apr 1998 |
| 1580 | Falcon Bay Operations, LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2007 |
| 1581 | Falcon Oil & Gas Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Nov 2022 |
| 1582 | Famcor Oil, Inc. | Scottsdale, AZ 85260 | Oil & Gas Operator | Sep 2020 |
| 1583 | Family Oil Company | | Oil Operator | Jan 2025 |
| 1584 | Fantasy Oil & Gas Ventures, L.L.C. | | Oil Operator | Dec 2024 |
| 1585 | Fantome, LLC | | Oil Operator | Jan 2007 |
| 1586 | Far West Development, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | May 2025 |
| 1587 | Fas Services, Inc. | | Oil Operator | Apr 2005 |
| 1588 | Faul Energy, Inc. | | Oil & Gas Operator | Oct 1988 |
| 1589 | Fay A. Williams | | Oil & Gas Operator | Dec 2024 |
| 1590 | Fear & Duncan | | Oil Operator | Jul 1979 |
| 1591 | Feazel Operating Company, Inc. | | Oil & Gas Operator | Feb 1979 |
| 1592 | Fee Energy Corporation | | Oil & Gas Operator | Jul 1978 |
| 1593 | Feldco, Inc. | | Oil & Gas Operator | Apr 2007 |
| 1594 | Felmont Oil Corporation | Walnut Creek, CA 94596-3568 | Oil & Gas Operator | Feb 1990 |
| 1595 | Ferguson Oil Company Inc | | Oil & Gas Operator | Apr 1994 |
| 1596 | Fernwood Corporation | | Oil Operator | Dec 1986 |
| 1597 | Ferry Lake Oil Co. | | Oil & Gas Operator | Jan 2025 |
| 1598 | Fi-Ro Corporation | Natchez, MS BADADDR | Oil & Gas Operator | Nov 2001 |
| 1599 | Field Petroleum Corp. | San Antonio, TX 78216 | Oil & Gas Operator | May 2025 |
| 1600 | Fieldwood Energy LLC | Houston, TX 77042 | Oil & Gas Operator | Dec 2024 |