| 1501 | Essex Corporation Of Louisiana | | Oil Operator | Dec 1997 |
| 1502 | Est Of WM G Helis (A Partnership) | | Oil & Gas Operator | Dec 2009 |
| 1503 | Est. Of H. L. Hunt | | Oil & Gas Operator | Jun 1983 |
| 1504 | Estate Oil & Gas Corp. | Dallas, TX 75206 | Oil & Gas Operator | Oct 2011 |
| 1505 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 1506 | Etc Field Services LLC | Dallas, TX 75225 | Oil Operator | Jun 2018 |
| 1507 | Etc Oil Corp | | Oil & Gas Operator | Mar 1994 |
| 1508 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 1509 | Etd Oil Co. | | Oil Operator | Oct 1990 |
| 1510 | Ethredge & Rhoads Oil Company | | Oil Operator | Dec 2012 |
| 1511 | Ethredge Oil Company | | Oil & Gas Operator | Aug 1998 |
| 1512 | Ethyl Gas Company, LLC | | Oil Operator | Jan 2025 |
| 1513 | Ethyl Properties Inc | | Oil & Gas Operator | Aug 1989 |
| 1514 | Ethyl-Buchanan | | Oil & Gas Operator | Feb 1987 |
| 1515 | Etoco Incorporated | Houston, TX 77002 | Oil & Gas Operator | May 2005 |
| 1516 | Etoco, L.P. | Houston, TX 77002 | Oil & Gas Operator | Sep 2026 |
| 1517 | Ettco Enterprises, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2024 |
| 1518 | Eucutta Petroleum Inc. | | Oil & Gas Operator | Sep 2000 |
| 1519 | Eugene Talbert Operating Co. | | Oil & Gas Operator | Mar 2013 |
| 1520 | Euroamerican Energy Group Inc | | Oil & Gas Operator | Oct 1993 |
| 1521 | Eurovest Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 1522 | Evangeline Natural Resources, LLC | | Oil & Gas Operator | Jan 2025 |
| 1523 | Evangeline Oil Prod. Co., Inc. | | Oil Operator | Apr 2001 |
| 1524 | Evangeline Operating Co., Inc. | | Oil Operator | Jun 1989 |
| 1525 | Evangeline Pumpers, Inc. | | Oil & Gas Operator | Jul 2005 |
| 1526 | Evans Brothers | | Oil & Gas Operator | Jan 2025 |
| 1527 | Evergreen Operating Co., LTD. | McAllen, TX 78502 | Oil & Gas Operator | Sep 2026 |
| 1528 | Excalibur Operating, LLC | | Oil & Gas Operator | Nov 2024 |
| 1529 | Excalibur Resources, Inc. | | Oil & Gas Operator | Apr 1986 |
| 1530 | Excel Oil & Gas, Inc. | Waxahachie, TX 75168 | Oil & Gas Operator | Sep 2026 |
| 1531 | Excel Operating Corporation | | Oil & Gas Operator | Dec 2024 |
| 1532 | Excel Royalty Company, LLC | | Oil Operator | Jun 2022 |
| 1533 | Excelsior Oil Corporation | | Oil & Gas Operator | May 1985 |
| 1534 | Exchange Expl & Prodn Co | | Oil Operator | Oct 2023 |
| 1535 | Exchange Oil & Gas Company | | Oil & Gas Operator | Oct 1996 |
| 1536 | Exchange Oil & Gas Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1987 |
| 1537 | Exco Operating Company, LP | Dallas, TX 75251 | Oil & Gas Operator | Sep 2026 |
| 1538 | Exco Partners Operating PTSHP LP | Dallas, TX 75251 | Oil & Gas Operator | Jan 2009 |
| 1539 | Exco Production Company, LP | Dallas, TX 75251 | Oil & Gas Operator | Dec 2009 |
| 1540 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Jun 2026 |
| 1541 | Exco/Hgi JV Assets, LLC | Dallas, TX 75251 | Oil & Gas Operator | Jun 2014 |
| 1542 | Exodus Energy, Inc. | Huntington Beach, CA 92615 | Oil & Gas Operator | Jul 2018 |
| 1543 | Exoro Energy, L.L.C. | | Oil & Gas Operator | Jun 2021 |
| 1544 | Expando Production Co. | | Oil & Gas Operator | Oct 1988 |
| 1545 | Expert Oil & Gas, L.L.C. | | Oil & Gas Operator | Nov 2024 |
| 1546 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Sep 2026 |
| 1547 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jan 2026 |
| 1548 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Sep 2026 |
| 1549 | F & F Drilling Company | | Oil Operator | Apr 1991 |
| 1550 | F & H Production | | Oil & Gas Operator | Apr 2014 |
| 1551 | F H Walsh Jr Operating Co Inc | | Oil & Gas Operator | Jul 1995 |
| 1552 | F Howard Walsh Jr | | Oil & Gas Operator | Aug 1992 |
| 1553 | F W Rabalais, Inc. | | Oil & Gas Operator | Dec 2014 |
| 1554 | F. E. Hargraves | | Oil Operator | Mar 1983 |
| 1555 | F.A.S. Environmental Services, L.L.C. | | Oil Operator | Jan 2025 |
| 1556 | F.E.Hargraves &Sons DRL.Co.Inc. | | Oil & Gas Operator | Mar 1992 |
| 1557 | F.S.M. Oil Co. | | Oil Operator | Aug 1979 |
| 1558 | Fair Oil Company | Tyler, TX 75710 | Oil & Gas Operator | Dec 2000 |
| 1559 | Fair Oil, LC | Tyler, TX 75710 | Oil & Gas Operator | Oct 2001 |
| 1560 | Fair Oil, LTD. | Tyler, TX 75710 | Oil & Gas Operator | Sep 2026 |
| 1561 | Fairfield Energy Corp. | Dallas, TX 75205 | Oil & Gas Operator | Sep 2026 |
| 1562 | Fairview Producing Corp. | | Oil Operator | Jul 2001 |
| 1563 | Fairway Resources Operating, LLC | Southlake, TX 76092 | Oil & Gas Operator | Aug 2022 |
| 1564 | Faith Energy, L.L.C. | | Oil & Gas Operator | Jan 2025 |
| 1565 | Faith Oil Of Hosston | | Oil Operator | Feb 1996 |
| 1566 | Falco S & D, Inc. | Shreveport, LA 71107 | Oil & Gas Operator | Apr 1998 |
| 1567 | Falcon Bay Operations, LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2007 |
| 1568 | Falcon Oil & Gas Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Nov 2022 |
| 1569 | Famcor Oil, Inc. | Scottsdale, AZ 85260 | Oil & Gas Operator | Sep 2020 |
| 1570 | Family Oil Company | | Oil Operator | Jan 2025 |
| 1571 | Fantasy Oil & Gas Ventures, L.L.C. | | Oil Operator | Dec 2024 |
| 1572 | Fantome, LLC | | Oil Operator | Jan 2007 |
| 1573 | Far West Development, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Sep 2026 |
| 1574 | Fas Services, Inc. | | Oil Operator | Apr 2005 |
| 1575 | Faul Energy, Inc. | | Oil & Gas Operator | Oct 1988 |
| 1576 | Fay A. Williams | | Oil & Gas Operator | Dec 2024 |
| 1577 | Fear & Duncan | | Oil Operator | Jul 1979 |
| 1578 | Feazel Operating Company, Inc. | | Oil & Gas Operator | Feb 1979 |
| 1579 | Fee Energy Corporation | | Oil & Gas Operator | Jul 1978 |
| 1580 | Feldco, Inc. | | Oil & Gas Operator | Apr 2007 |
| 1581 | Felmont Oil Corporation | Walnut Creek, CA 94596-3568 | Oil & Gas Operator | Feb 1990 |
| 1582 | Ferguson Oil Company Inc | | Oil & Gas Operator | Apr 1994 |
| 1583 | Fernwood Corporation | | Oil Operator | Dec 1986 |
| 1584 | Ferry Lake Oil Co. | | Oil & Gas Operator | Jan 2025 |
| 1585 | Fi-Ro Corporation | Natchez, MS BADADDR | Oil & Gas Operator | Nov 2001 |
| 1586 | Field Petroleum Corp. | San Antonio, TX 78216 | Oil & Gas Operator | Sep 2026 |
| 1587 | Fieldwood Energy LLC | Houston, TX 77042 | Oil & Gas Operator | Dec 2024 |
| 1588 | Fieldwood Energy Offshore LLC | Houston, TX 77042 | Oil & Gas Operator | Sep 2026 |
| 1589 | Fieldwood Onshore LLC | Houston, TX 77098 | Oil & Gas Operator | Sep 2026 |
| 1590 | Fife Oil & Gas | | Oil Operator | Oct 1987 |
| 1591 | Fife Oil & Gas, Inc. | | Oil Operator | Mar 1991 |
| 1592 | Fife Oil Company, Inc. | | Oil & Gas Operator | Feb 2008 |
| 1593 | Fifty Third Corp. & K.M.O.C. | | Gas Operator | Jul 1994 |
| 1594 | Fifty-Third Corporation | | Gas Operator | Jul 1994 |
| 1595 | Fin-Oil, Inc. | | Oil & Gas Operator | Apr 1985 |
| 1596 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 1597 | Fina Oil& Chem Co/Marathon Oil | | Oil & Gas Operator | Dec 1992 |
| 1598 | Finaly Resources LLC | Sunset Beach, CA 90742 | Oil & Gas Operator | Sep 2026 |
| 1599 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Sep 2026 |
| 1600 | Fireside Oil And Gas, Inc. | West Monroe, LA 71294 | Oil & Gas Operator | Feb 2002 |