| 10501 | Floyd Oil Company | Houston, TX 77002 | Oil & Gas Operator | Nov 1999 |
| 10502 | Floyd Operating Company | Houston, TX 77002 | Oil & Gas Operator | Jul 2004 |
| 10503 | Floyd Ray Porter | | Oil & Gas Operator | Nov 1986 |
| 10504 | Floyd Williams | | Oil Operator | Aug 1988 |
| 10505 | Floyd, Timber Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 10506 | Flud Richard | Okmulgee, OK 74447 | Oil & Gas Operator | Mar 2015 |
| 10507 | Fluharty Enterprises Inc | Bridgeport, WV 25338 | Oil & Gas Operator | Oct 2021 |
| 10508 | Fluid Disposal Services LLC | Chickasha, OK 73018-9684 | Oil Operator | Aug 2015 |
| 10509 | Fluor Oil & Gas Corporation | Midland, TX 79701 | Oil & Gas Operator | Aug 2019 |
| 10510 | Flusche Brothers | Muenster, TX 76252 | Oil & Gas Operator | Feb 2026 |
| 10511 | Flusche Herbert J | Wichita Falls, TX 76309 | Oil Operator | Jun 1997 |
| 10512 | Flusche Properties, L.L.C. | Electra, TX 76360 | Oil & Gas Operator | Jan 2017 |
| 10513 | Flusche Supply, Inc. | Electra, TX 76360 | Oil & Gas Operator | Aug 1994 |
| 10514 | Flusche, Herb | Wichita Falls, TX 76309 | Oil & Gas Operator | Mar 2005 |
| 10515 | Flux Energy LLC | Spring, TX 77379 | Oil & Gas Operator | Feb 2026 |
| 10516 | Flying Diamond Oil Corp | | Oil & Gas Operator | Dec 1983 |
| 10517 | Flying J Inc | Roosevelt, UT 84066 | Oil & Gas Operator | Jul 1995 |
| 10518 | Flying J Oil & Gas Inc | North Salt Lake, UT 84054 | Oil & Gas Operator | Dec 2009 |
| 10519 | Flying M Petroleum LLC | Bristow, OK 74010 | Oil & Gas Operator | Oct 2025 |
| 10520 | Flying W Resources, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 10521 | Flynn Energy Cor | | Oil & Gas Operator | Mar 1992 |
| 10522 | Flynn Energy Corporation | Tulsa, OK 74137 | Oil & Gas Operator | Mar 1993 |
| 10523 | Flynn, Ben A. Trustee | Coleman, TX 76834 | Oil & Gas Operator | Jul 2001 |
| 10524 | FM Production | Kilgore, TX 75662 | Oil Operator | Feb 2026 |
| 10525 | FMC Corporation | Green River, WY 82935 | Oil & Gas Operator | Dec 2008 |
| 10526 | FMD Oil Co. | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2020 |
| 10527 | FMP Operating Company, LTD PTN | | Oil & Gas Operator | Mar 1990 |
| 10528 | FMR Services Inc. | | Gas Operator | Dec 2011 |
| 10529 | Fna Oil Company, LLC | Richfield, KS 67953 | Gas Operator | Sep 2025 |
| 10530 | Fne Operating LLC | | Oil Operator | Dec 2024 |
| 10531 | Fo Energy LLC | Canton, OH 44718 | Oil & Gas Operator | Dec 2024 |
| 10532 | Foag, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2022 |
| 10533 | Focus Energy, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2019 |
| 10534 | Fod Oil Company | | Oil Operator | May 1999 |
| 10535 | Foggy Bottom Farms, LLC | Bowling Green, KY 42101 | Oil Operator | Dec 2023 |
| 10536 | Fola Land Company Inc | | Gas Operator | Dec 2003 |
| 10537 | Folk Oil | | Oil Operator | Dec 2009 |
| 10538 | Follett Operating Co. | Darrouzett, TX 79024 | Oil & Gas Operator | Jun 2019 |
| 10539 | Foltz & Foltz LTD Partnership | Robertsville, OH 44670 | Oil & Gas Operator | Dec 2018 |
| 10540 | Fontainebleau Operating, LLC | | Oil & Gas Operator | Dec 2024 |
| 10541 | Fontenot Pet Land Services, Inc. | | Oil & Gas Operator | Aug 2002 |
| 10542 | Foothill Energy, LLC | Spring, TX 77393 | Oil & Gas Operator | Feb 2026 |
| 10543 | Foothills Energy LLC | Seabrook, TX 77586-3541 | Gas Operator | Feb 2013 |
| 10544 | Foothills Texas, Inc. | Houston, TX 77269 | Oil & Gas Operator | Aug 2019 |
| 10545 | Fora Company | Borger, TX 79007 | Oil & Gas Operator | Feb 2026 |
| 10546 | Forbes Harold G | | Oil Operator | Dec 1984 |
| 10547 | Forbes Producing, LLC | Corpus Chrsti, TX 78410 | Oil Operator | Sep 2025 |
| 10548 | Forbes, C. C. Company | Alice, TX 78333 | Oil & Gas Operator | Sep 2015 |
| 10549 | Forbes, Charles C. | Hebbronville, TX 78361 | Oil & Gas Operator | Jul 2011 |
| 10550 | Forbes, Patrick T. | Eureka, KS 67045 | Oil Operator | Sep 2025 |
| 10551 | Force 4 Energy Resources, Inc. | Austin, TX 78733 | Oil & Gas Operator | Aug 2005 |
| 10552 | Force 5 Energy, LLC | Houston, TX 77090 | Oil & Gas Operator | Dec 2018 |
| 10553 | Force Antrim Development Inc | | Gas Operator | Dec 1999 |
| 10554 | Forcenergy Gas Exploration Inc. | Miami, FL 33129 | Oil & Gas Operator | Aug 1996 |
| 10555 | Forcenergy Inc | Miami, FL 33129 | Oil & Gas Operator | Mar 2015 |
| 10556 | Forcenergy Onshore Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2012 |
| 10557 | Ford Chapman & Assoc | Midland, TX 79710 | Oil Operator | Sep 2000 |
| 10558 | Ford Energy Corporation | Chickasha, OK 73018 | Oil & Gas Operator | Nov 2025 |
| 10559 | Ford Gum & Machine Co., Inc. | Akron, NY 14001 | Gas Operator | Dec 2024 |
| 10560 | Ford Roger & Marjorie | Fowler, OH 44418 | Gas Operator | Dec 1993 |
| 10561 | Ford Tank Truck Service | | Oil Operator | Jan 2022 |
| 10562 | Ford, Cregg | Auburn, NY 13021 | Gas Operator | Dec 2024 |
| 10563 | Ford, Don H. & Assoc. | San Antonio, TX 78217 | Oil & Gas Operator | Feb 2026 |
| 10564 | Ford, R. J. Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Feb 2026 |
| 10565 | Fordoche Operating Company, LLC | | Oil & Gas Operator | Nov 2024 |
| 10566 | Fordyce Oil & Gas | Sullivan City, TX 78595 | Oil & Gas Operator | Jul 2022 |
| 10567 | Fore Oil, LLC | Manvel, TX 77578 | Oil Operator | May 2021 |
| 10568 | Foree Oil Company | Terrell, TX 75160 | Oil & Gas Operator | Feb 2026 |
| 10569 | Foree R L | Dallas, TX 75225 | Oil & Gas Operator | Aug 2001 |
| 10570 | Foree, R. L. Trust "A" | Dallas, TX 75225 | Oil & Gas Operator | Dec 1999 |
| 10571 | Foreland Operating, LLC | Royse City, TX 75189 | Oil & Gas Operator | Oct 2021 |
| 10572 | Foreland Resources LLC | Lakewood, CO 80228 | Oil & Gas Operator | Oct 2025 |
| 10573 | Forell Energy Company | Fullerton, CA 92838 | Oil Operator | Dec 2023 |
| 10574 | Foreman Enterprises Inc | Edmond, OK 73003 | Oil & Gas Operator | Oct 2025 |
| 10575 | Foreman Joy | Guymon, OK 73942-3159 | Oil & Gas Operator | Jan 2003 |
| 10576 | Forest 1 Development Company | Denver, CO 80202-4966 | Oil & Gas Operator | Mar 2008 |
| 10577 | Forest Gray Energy | | Oil & Gas Operator | Oct 2025 |
| 10578 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 10579 | Forest Oil Permian Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 10580 | Forestar Group Inc | | Oil Operator | Sep 2015 |
| 10581 | Forestar Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2016 |
| 10582 | Forestar Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2017 |
| 10583 | Forexco, Inc. | Greensboro, NC 27438 | Oil & Gas Operator | Dec 2020 |
| 10584 | Forge Energy Operating, LLC | San Antonio, TX 78209 | Oil & Gas Operator | Jun 2023 |
| 10585 | Forge Energy, LLC | San Antonio, TX 78249 | Oil & Gas Operator | Apr 2019 |
| 10586 | Fork Run Oil & Gas LLC | Sheffield, PA 16347-0012 | Oil & Gas Operator | Dec 2024 |
| 10587 | Forman Exploration Company | | Oil & Gas Operator | Oct 1988 |
| 10588 | Forman Petroleum Corporation | | Oil & Gas Operator | Aug 2001 |
| 10589 | Formation Mechan | | Oil Operator | Dec 1986 |
| 10590 | Formation Recovery LLC | Weatherford, TX 76087 | Oil & Gas Operator | Feb 2026 |
| 10591 | Formation Resources LLC | Fort Worth, TX 76185 | Oil & Gas Operator | Feb 2026 |
| 10592 | Formax Oil Company | | Oil & Gas Operator | Dec 1993 |
| 10593 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | Feb 2026 |
| 10594 | Formentera Opr LLC | Austin, TX 78701-4889 | Gas Operator | Nov 2025 |
| 10595 | Formholtz, Allen | Lakeview, NY 14085 | Gas Operator | Dec 2024 |
| 10596 | Formor Operating Inc | Tyler, TX 75701 | Oil & Gas Operator | May 2013 |
| 10597 | Fornash Oil LLC | Waynesburg, OH 44688 | Oil & Gas Operator | Dec 2024 |
| 10598 | Forney & McCombs | Houston, TX 77056 | Oil & Gas Operator | Jan 1998 |
| 10599 | Forney Oil Corporation | Houston, TX 77056 | Oil & Gas Operator | Jan 1998 |
| 10600 | Forrest A Ward | Okmulgee, OK 74447-8891 | Oil & Gas Operator | Jul 2025 |