| 1601 | Fieldwood Energy Offshore LLC | Houston, TX 77042 | Oil & Gas Operator | May 2025 |
| 1602 | Fieldwood Onshore LLC | Houston, TX 77098 | Oil & Gas Operator | May 2025 |
| 1603 | Fife Oil & Gas | | Oil Operator | Oct 1987 |
| 1604 | Fife Oil & Gas, Inc. | | Oil Operator | Mar 1991 |
| 1605 | Fife Oil Company, Inc. | | Oil & Gas Operator | Feb 2008 |
| 1606 | Fifty Third Corp. & K.M.O.C. | | Gas Operator | Jul 1994 |
| 1607 | Fifty-Third Corporation | | Gas Operator | Jul 1994 |
| 1608 | Fin-Oil, Inc. | | Oil & Gas Operator | Apr 1985 |
| 1609 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 1610 | Fina Oil& Chem Co/Marathon Oil | | Oil & Gas Operator | Dec 1992 |
| 1611 | Finaly Resources LLC | Sunset Beach, CA 90742 | Oil & Gas Operator | May 2025 |
| 1612 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | May 2025 |
| 1613 | Fireside Oil And Gas, Inc. | West Monroe, LA 71294 | Oil & Gas Operator | Feb 2002 |
| 1614 | First Energy Corporation | | Oil & Gas Operator | Jun 1993 |
| 1615 | First Energy Development Corp. | | Oil & Gas Operator | Sep 2008 |
| 1616 | Firstrike Energy Corporation | Cleburne, TX 76033 | Oil & Gas Operator | Jan 2025 |
| 1617 | Fisher Joint Venture | | Oil & Gas Operator | Oct 1998 |
| 1618 | Fite Oil & Gas, Inc. | Shreveport, LA 71163 | Oil & Gas Operator | May 2025 |
| 1619 | Fitzgerald Production Co. | Oil City, LA 71061 | Oil & Gas Operator | Dec 2024 |
| 1620 | Five States Energy Company | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 1621 | Five States Operating Company | Dallas, TX 75206 | Oil & Gas Operator | Feb 2008 |
| 1622 | Five-Jab, Inc. | Tomball, TX 77377 | Oil & Gas Operator | May 2025 |
| 1623 | Flash Gas & Oil Northeast, Inc | | Oil & Gas Operator | May 2007 |
| 1624 | Flash Gas & Oil Southwest, Inc. | Mandeville, LA 70470 | Oil & Gas Operator | Oct 2019 |
| 1625 | Flash Gas & Oil, Inc. | | Oil & Gas Operator | May 1991 |
| 1626 | Flatwater Energy, LLC | | Oil & Gas Operator | Dec 2024 |
| 1627 | Fletcher Operating Co. | | Oil & Gas Operator | May 1989 |
| 1628 | Flex Energy, L.L.C. | | Oil & Gas Operator | Feb 2010 |
| 1629 | Flora B Shinnick | | Oil Operator | Jan 2025 |
| 1630 | Flores & Rucks, Inc. | | Oil & Gas Operator | Jun 1997 |
| 1631 | Florida Exploration Co | Aurora, CO 80014 | Oil & Gas Operator | Sep 1989 |
| 1632 | Florida Gas Transmission Co. | | Oil Operator | Dec 2007 |
| 1633 | Flourison Oil & Gas, LLC | | Oil Operator | Jan 2025 |
| 1634 | Floyd Oil Company | Houston, TX 77002 | Oil & Gas Operator | Nov 1999 |
| 1635 | Floyd Ray Porter | | Oil & Gas Operator | Nov 1986 |
| 1636 | Floyd Williams | | Oil Operator | Aug 1988 |
| 1637 | Flynn Energy Corporation | Tulsa, OK 74137 | Oil & Gas Operator | Mar 1993 |
| 1638 | FMP Operating Co., LTD. PTN. | | Oil & Gas Operator | Mar 1990 |
| 1639 | Fne Operating LLC | | Oil Operator | Dec 2024 |
| 1640 | Focus Energy, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2019 |
| 1641 | Fod Oil Company | | Oil Operator | May 1999 |
| 1642 | Fontainebleau Operating, LLC | | Oil & Gas Operator | Dec 2024 |
| 1643 | Fontenot Pet Land Services, Inc. | | Oil & Gas Operator | Aug 2002 |
| 1644 | Forcenergy Gas Exploration Inc. | Miami, FL 33129 | Oil & Gas Operator | Aug 1996 |
| 1645 | Forcenergy Inc | Miami, FL 33129 | Oil & Gas Operator | Mar 2015 |
| 1646 | Fordoche Operating Company, LLC | | Oil & Gas Operator | Nov 2024 |
| 1647 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 1648 | Forexco, Inc. | Greensboro, NC 27438 | Oil & Gas Operator | Dec 2020 |
| 1649 | Forman Exploration Company | | Oil & Gas Operator | Oct 1988 |
| 1650 | Forman Petroleum Corporation | | Oil & Gas Operator | Aug 2001 |
| 1651 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | May 2025 |
| 1652 | Forrest Exploration & Dev, LLC | | Gas Operator | May 2003 |
| 1653 | Fort Apache Energy, Inc. | Boerne, TX 78015 | Oil & Gas Operator | May 2025 |
| 1654 | Fortenberry Operating Co., Inc | | Oil & Gas Operator | Nov 2003 |
| 1655 | Fortenbery Drilling Co., Inc. | | Oil & Gas Operator | Oct 1979 |
| 1656 | Fortuna Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2014 |
| 1657 | Fortune Gas & Oil, Inc. | | Oil & Gas Operator | Apr 2004 |
| 1658 | Fortune Operating Company | Willis, TX 77378 | Oil & Gas Operator | May 2025 |
| 1659 | Fortune Resources LLC | Longview, TX 75604 | Oil & Gas Operator | May 2025 |
| 1660 | Fortune-Shelby | | Oil & Gas Operator | Mar 1989 |
| 1661 | Fortune-Western | | Oil Operator | Dec 1989 |
| 1662 | Forza Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2025 |
| 1663 | Fossil Operating, Inc. | Dallas, TX 75238 | Oil & Gas Operator | May 2025 |
| 1664 | Foster-Brown Operations, Inc. | | Oil & Gas Operator | Apr 2003 |
| 1665 | Foti Oil & Gas, Inc. | | Oil Operator | Sep 1986 |
| 1666 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | May 2025 |
| 1667 | Four Rivers Exploration, Inc. | | Oil & Gas Operator | Sep 2002 |
| 1668 | Four Seasons, Inc. | | Oil & Gas Operator | Jun 1983 |
| 1669 | Four Star Development Corp. | | Oil & Gas Operator | Feb 2013 |
| 1670 | Four Star Oil Company | | Oil & Gas Operator | May 2015 |
| 1671 | Fpco Oil & Gas Co. | New Orleans, LA 70160 | Oil & Gas Operator | Jan 2025 |
| 1672 | Fran Oil, Inc. | | Oil & Gas Operator | Dec 2024 |
| 1673 | Francis Oil & Gas, LLC | | Oil & Gas Operator | Jan 2011 |
| 1674 | Francis-Guido Oil Expl. Inc. | | Oil Operator | Feb 1986 |
| 1675 | Francis-Guido Operating Co Inc | | Oil & Gas Operator | Dec 1987 |
| 1676 | Frank B McGrath | | Gas Operator | Nov 2011 |
| 1677 | Frank B. Aumiller | | Oil Operator | Jun 1991 |
| 1678 | Frank C. VInson | | Oil & Gas Operator | May 1995 |
| 1679 | Frank Hale | | Oil & Gas Operator | Jan 2025 |
| 1680 | Frank J. Hall | | Oil & Gas Operator | Oct 1979 |
| 1681 | Frank S. Moore | | Oil Operator | Feb 1990 |
| 1682 | Frank Spooner | | Oil & Gas Operator | Mar 1984 |
| 1683 | Frankrich Operating Company | | Gas Operator | May 2007 |
| 1684 | Franks & Bass Et Al | | Oil & Gas Operator | Sep 1989 |
| 1685 | Franks & Broyles Et Al | | Oil & Gas Operator | Sep 1989 |
| 1686 | Franks & Duggan | | Oil & Gas Operator | Nov 1987 |
| 1687 | Franks & Flynn Energy | | Oil & Gas Operator | Jun 1987 |
| 1688 | Franks & McRae | | Oil & Gas Operator | Sep 1989 |
| 1689 | Franks & Petrofunds Inc. Etal | | Oil & Gas Operator | Jun 1986 |
| 1690 | Franks & Petrofunds, Inc. | | Oil & Gas Operator | Sep 1989 |
| 1691 | Franks - Arkla | | Oil & Gas Operator | Jun 1985 |
| 1692 | Franks - Duggan Et Al | | Oil & Gas Operator | Aug 1989 |
| 1693 | Franks Operating Company, L.L.C. | | Oil & Gas Operator | Dec 2024 |
| 1694 | Franks Petroleum Inc. | | Oil & Gas Operator | Nov 1994 |
| 1695 | Franks Petroleum, Inc. Et Al | | Oil & Gas Operator | Oct 1989 |
| 1696 | Franks,Petrofunds & Flynn Etal | | Oil & Gas Operator | Nov 1984 |
| 1697 | Franks-Petrofund-Placid-Swepco | | Oil & Gas Operator | Aug 1989 |
| 1698 | Franks-Petrofunds & Vermilion | | Oil & Gas Operator | Aug 1989 |
| 1699 | Frazier Temple Oil Co. | | Oil & Gas Operator | Dec 1996 |
| 1700 | Fre-Lyn, Inc. | | Oil Operator | Feb 1985 |