| 501 | Force 5 Energy, LLC | Houston, TX 77090 | Oil & Gas Operator | Dec 2018 |
| 502 | Force Antrim Development Inc | | Gas Operator | Dec 1999 |
| 503 | Forcenergy Gas Exploration Inc. | Miami, FL 33129 | Oil & Gas Operator | Aug 1996 |
| 504 | Forcenergy Inc | Miami, FL 33129 | Oil & Gas Operator | Mar 2015 |
| 505 | Forcenergy Onshore Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2012 |
| 506 | Ford Chapman & Assoc | Midland, TX 79710 | Oil Operator | Sep 2000 |
| 507 | Ford Energy Corporation | Chickasha, OK 73023-0906 | Oil & Gas Operator | Dec 2023 |
| 508 | Ford Gum & Machine Co., Inc. | Akron, NY 14001 | Gas Operator | Dec 2022 |
| 509 | Ford Oil Co | Bangs, TX 76823 | Oil & Gas Operator | Dec 2022 |
| 510 | Ford Tank Truck Service | | Oil Operator | Jan 2022 |
| 511 | Ford, Cregg | Auburn, NY 13021 | Gas Operator | Dec 2022 |
| 512 | Ford, Don H. & Assoc. | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2024 |
| 513 | Ford, R. J. Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2024 |
| 514 | Fordoche Operating Company, LLC | | Oil & Gas Operator | Nov 2023 |
| 515 | Fordyce Oil & Gas | Sullivan City, TX 78595 | Oil & Gas Operator | Jul 2022 |
| 516 | Fore Oil, LLC | Manvel, TX 77578 | Oil Operator | May 2021 |
| 517 | Foree Oil Company | Terrell, TX 75160 | Oil & Gas Operator | Apr 2024 |
| 518 | Foree R L | Dallas, TX 75225 | Oil & Gas Operator | Aug 2001 |
| 519 | Foree, R. L. Trust "A" | Dallas, TX 75225 | Oil & Gas Operator | Dec 1999 |
| 520 | Foreland Operating, LLC | Royse City, TX 75189 | Oil & Gas Operator | Oct 2021 |
| 521 | Foreland Resources LLC | Lakewood, CO 80228 | Oil & Gas Operator | Mar 2024 |
| 522 | Forell Energy Company | Fullerton, CA 92838 | Oil Operator | Dec 2019 |
| 523 | Foreman Enterprises, Inc. | Edmond, OK 73003 | Oil & Gas Operator | Jan 2024 |
| 524 | Foreman Joy | Guymon, OK 73942-3159 | Oil & Gas Operator | Jan 2003 |
| 525 | Forest 1 Development Company | Denver, CO 80202-4966 | Oil & Gas Operator | Mar 2008 |
| 526 | Forest Gray Energy | | Oil & Gas Operator | Nov 2023 |
| 527 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 528 | Forest Oil Permian Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 529 | Forestar Group Inc | | Oil & Gas Operator | Sep 2015 |
| 530 | Forestar Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2016 |
| 531 | Forestar Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2017 |
| 532 | Forexco, Inc. | Greensboro, NC 27438 | Oil & Gas Operator | Dec 2020 |
| 533 | Forge Energy Operating, LLC | San Antonio, TX 78249 | Oil & Gas Operator | Jun 2023 |
| 534 | Forge Energy, LLC | San Antonio, TX 78249 | Oil & Gas Operator | Apr 2019 |
| 535 | Fork Run Oil & Gas LLC | Sheffield, PA 16347-0012 | Oil & Gas Operator | Dec 2023 |
| 536 | Forman Exploration Company | | Oil & Gas Operator | Oct 1988 |
| 537 | Forman Petroleum Corporation | | Oil & Gas Operator | Aug 2001 |
| 538 | Formation Mechan | | Oil Operator | Dec 1986 |
| 539 | Formation Recovery LLC | Weatherford, TX 76087 | Oil & Gas Operator | Apr 2024 |
| 540 | Formation Resources LLC | Fort Worth, TX 76185 | Oil & Gas Operator | Apr 2024 |
| 541 | Formax Oil Company | | Oil & Gas Operator | Dec 1993 |
| 542 | Formby E E | Pawhuska, OK 74056 | Oil Operator | Nov 1998 |
| 543 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | Apr 2024 |
| 544 | Formor Operating Inc | Tyler, TX 75701 | Oil & Gas Operator | May 2013 |
| 545 | Fornash Oil LLC | Waynesburg, OH 44688 | Oil & Gas Operator | Dec 2023 |
| 546 | Forney & McCombs | Houston, TX 77056 | Oil & Gas Operator | Jan 1998 |
| 547 | Forney Oil Corporation | Houston, TX 77056 | Oil & Gas Operator | Jan 1998 |
| 548 | Forrest A Ward | Okmulgee, OK 74447-8891 | Oil & Gas Operator | Nov 2023 |
| 549 | Forrest Energy, LLC | Hattiesburg, MS 39401 | Oil & Gas Operator | Feb 1998 |
| 550 | Forrest Exploration & Dev, LLC | | Gas Operator | May 2003 |
| 551 | Forrest Richard E | New Bethlehem, PA 16242-2547 | Gas Operator | Dec 2019 |
| 552 | Forrestel II, E. Peter | Akron, NY 14001 | Gas Operator | Dec 2022 |
| 553 | Forrester Oil & Gas Co. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 554 | Forrester, J. L. | Longview, TX 75606 | Oil & Gas Operator | Apr 2024 |
| 555 | Forsan Oil Company | Forsan, TX 79733 | Oil & Gas Operator | Jul 2008 |
| 556 | Forster Oil Co. | | Oil & Gas Operator | Dec 2016 |
| 557 | Forster, Fred Jr. | Midland, TX 79705 | Oil & Gas Operator | Aug 2008 |
| 558 | Forsythe Lawana | Wilson, OK 73463-0438 | Oil Operator | Mar 2020 |
| 559 | Forsythe Trucking Inc | Wilson, OK 73463 | Oil & Gas Operator | Jan 2024 |
| 560 | Fort Apache Energy, Inc. | Boerne, TX 78015 | Oil & Gas Operator | Apr 2024 |
| 561 | Fort Exploration Company | FT Smith, AR 72901 | Gas Operator | May 2001 |
| 562 | Fort Operating Company | Fort Smith, AR 72923 | Gas Operator | Nov 2018 |
| 563 | Fort Worth Natural Gas, Inc. | Dallas, TX 75254 | Oil & Gas Operator | Apr 2024 |
| 564 | Fort Worth Production Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Oct 1996 |
| 565 | Fortay Inc | Sunray, TX 79086 | Oil & Gas Operator | Apr 2024 |
| 566 | Forte Energy Corporation | Dallas, TX 75205 | Oil & Gas Operator | Dec 2010 |
| 567 | Forte Energy Corpration | Houston, TX 77024-1209 | Oil & Gas Operator | Jan 1995 |
| 568 | Fortenberry Operating Co., Inc | | Oil & Gas Operator | Nov 2003 |
| 569 | Fortenbery Drilling Co., Inc. | | Oil & Gas Operator | Oct 1979 |
| 570 | Fortenbery Operating Co Inc | | Oil & Gas Operator | May 1993 |
| 571 | Fortenbery Wade | | Oil & Gas Operator | May 1980 |
| 572 | Fortitude Exploration Co | | Oil & Gas Operator | Feb 2024 |
| 573 | Fortress Energy Corp | Pittsburgh, PA 15217-4207 | Oil & Gas Operator | Dec 2023 |
| 574 | Fortson Oil | | Oil & Gas Operator | Jan 1998 |
| 575 | Fortson Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2020 |
| 576 | Fortuna Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2014 |
| 577 | Fortuna Exploration, Inc. | Abilene, TX 79602 | Oil & Gas Operator | Apr 2024 |
| 578 | Fortuna Resources Dvlpment, LLC | Houston, TX 77007 | Oil & Gas Operator | Apr 2024 |
| 579 | Fortune Energy, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Apr 2024 |
| 580 | Fortune Gas & Oil | Shreveport, LA 71118-3457-3457 | Oil & Gas Operator | Dec 2002 |
| 581 | Fortune Gas & Oil, Inc. | | Oil & Gas Operator | Apr 2004 |
| 582 | Fortune Natural Resources Corp. | Houston, TX 77067 | Oil & Gas Operator | Dec 2003 |
| 583 | Fortune Oil LTD | Salt Lake City, UT 84106 | Oil & Gas Operator | May 1987 |
| 584 | Fortune Operating Company | Willis, TX 77378 | Oil & Gas Operator | Apr 2024 |
| 585 | Fortune Operating, Inc. | Bowling Green, KY 42104 | Oil & Gas Operator | Apr 2024 |
| 586 | Fortune Petroleum Corporation | | Oil & Gas Operator | Dec 1994 |
| 587 | Fortune Production Co. | San Angelo, TX 76906 | Oil & Gas Operator | Dec 2008 |
| 588 | Fortune Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Apr 2024 |
| 589 | Fortune-Western | | Oil Operator | Dec 1989 |
| 590 | Forty Acres Energy, LLC | Houston, TX 77079173 | Oil & Gas Operator | Feb 2024 |
| 591 | Forum Exploration Co., L.P. | Tyler, TX 75710 | Oil & Gas Operator | Apr 2010 |
| 592 | Forza Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2024 |
| 593 | Foshee Operating, LLC | | Oil & Gas Operator | Jun 2004 |
| 594 | Foss, Arthur & Ann | | Gas Operator | Dec 2022 |
| 595 | Fossil Creek Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Apr 2024 |
| 596 | Fossil Creek Energy, LLC | Russell, KS 67665 | Oil Operator | Dec 2023 |
| 597 | Fossil Creek Resources LLC | Arlington, TX 76011 | Oil & Gas Operator | Mar 2015 |
| 598 | Fossil Energy Inc | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 599 | Fossil Energy, LLC | Russell, KS 67665 | Oil Operator | Dec 2023 |
| 600 | Fossil Fuel Inc | Dallas, TX BAD ADDR | Oil & Gas Operator | Dec 1998 |