| 10501 | Four Brothers Inc | | Oil & Gas Operator | Jan 2020 |
| 10502 | Four C Oil & Gas Corp. | Dallas, TX 75206 | Oil & Gas Operator | Jan 2024 |
| 10503 | Four Corners Energy, LLC | Gulf Breeze, FL 32563 | Oil & Gas Operator | Nov 2025 |
| 10504 | Four Corners Exploration Co | Farmington, NM 87499 | Oil & Gas Operator | Aug 2025 |
| 10505 | Four Corners Oil, LLC | Cape Fair, MO 65624 | Oil Operator | Mar 2025 |
| 10506 | Four Corners Petroleum II, LLC | Denver, CO 80215 | Oil & Gas Operator | Feb 2023 |
| 10507 | Four Diamond Operating, LLC | Kilgore, TX 75662 | Oil Operator | Nov 2025 |
| 10508 | Four Forty One Oil Co. | Natalia, TX 78059 | Oil & Gas Operator | Nov 2025 |
| 10509 | Four H Oil Properties | Graham, TX 76450 | Oil & Gas Operator | Nov 2025 |
| 10510 | Four K Production | Pampa, TX 79065 | Oil & Gas Operator | Nov 2025 |
| 10511 | Four Kin Oil Co | Muenster, TX 76252 | Oil & Gas Operator | Dec 2001 |
| 10512 | Four Leaf Land Company | West Union, WV 26456-0000 | Oil & Gas Operator | Dec 2021 |
| 10513 | Four North Inc | Atoka, OK 74525 | Oil Operator | Feb 2004 |
| 10514 | Four R Operating Company, LLC | Smackover, AR 71762 | Oil & Gas Operator | Dec 2024 |
| 10515 | Four Rivers Exploration, Inc. | | Oil & Gas Operator | Sep 2002 |
| 10516 | Four Seas Exploration LLC | Oklahoma City, OK 73101-1557 | Oil & Gas Operator | Dec 2019 |
| 10517 | Four Seasons, Inc. | | Oil & Gas Operator | Jun 1983 |
| 10518 | Four Sevens Oil Co., LTD. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2001 |
| 10519 | Four Sevens Operating Co., LTD. | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2025 |
| 10520 | Four Square Oil Company Inc | Kellyville, OK 74039 | Oil Operator | Mar 2011 |
| 10521 | Four Square Production, L.L.C. | Houston, TX 77079 | Oil & Gas Operator | Aug 2004 |
| 10522 | Four Star Development Corp. | | Oil & Gas Operator | Feb 2013 |
| 10523 | Four Star Oil & Gas Company | Houston, TX 77252 | Oil & Gas Operator | Jul 2025 |
| 10524 | Four Star Oil - | | Oil Operator | Dec 1987 |
| 10525 | Four Star Oil Company | | Oil & Gas Operator | May 2015 |
| 10526 | Four Starr Energy, Inc. | Dallas, TX 75243 | Gas Operator | May 2016 |
| 10527 | Four Starr Production, LLC | Dallas, TX 75243 | Oil & Gas Operator | Nov 2025 |
| 10528 | Four States Petr | | Oil & Gas Operator | Nov 1990 |
| 10529 | Four Teams Oil Production & Exploration Inc. | | Oil & Gas Operator | Sep 2025 |
| 10530 | Four W Oil Co., LLC | | Oil Operator | Dec 2024 |
| 10531 | Four-A Energy LLC | Cody, WY 82414 | Oil Operator | Sep 2025 |
| 10532 | Four-C Management & Industries | Rockdale, TX 76567 | Oil & Gas Operator | Aug 2008 |
| 10533 | Four-J Oil Ops | Osawatomie, KS 66064 | Oil Operator | Mar 1998 |
| 10534 | Four-O-One Corporation | Edmond, OK 73013-1977 | Oil & Gas Operator | Mar 2015 |
| 10535 | Four-S Oil Co., LTD. | Kilgore, TX 75663 | Oil Operator | Apr 2007 |
| 10536 | Four-Way Oper In | | Oil Operator | Aug 1994 |
| 10537 | Four-Way Operating, Inc. | Great Bend, KS 67530 | Oil Operator | Sep 2013 |
| 10538 | Fourcooks Oil & Gas, LLC | Graham, TX 76450 | Oil Operator | Nov 2025 |
| 10539 | Fourpoint Energy, LLC | Denver, CO 80206 | Oil & Gas Operator | Nov 2025 |
| 10540 | Fourpoint Resources, LLC | Denver, CO 80206 | Oil & Gas Operator | Aug 2025 |
| 10541 | Fourstar Resources LLC | Westlake, TX 76262 | Oil Operator | Sep 2025 |
| 10542 | Fourth Floor Operating LLC | Austin, TX 78746 | Oil & Gas Operator | Nov 2025 |
| 10543 | Fourth Quarter Program | Boulder, CO 80306 | Oil Operator | Feb 2006 |
| 10544 | Fourway Oil Company | Longview, TX 75606 | Oil & Gas Operator | Nov 2025 |
| 10545 | Fourwinds Oil Corporation | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 10546 | Fouss Energy LLC | Whipple, OH 45788 | Oil & Gas Operator | Dec 2024 |
| 10547 | Fouts Operations Inc | Glouster, OH 45732 | Oil & Gas Operator | Dec 1987 |
| 10548 | Fouts William Bruce | Glouster, OH 45732 | Oil & Gas Operator | Dec 2024 |
| 10549 | Fowler Oil & Gas LLC | Fort Worth, TX 76109 | Oil & Gas Operator | Nov 2025 |
| 10550 | Fowler, Leonard | | Gas Operator | Dec 1998 |
| 10551 | Fox Auto Sales Of Tennessee, Inc | | Oil Operator | Dec 2012 |
| 10552 | Fox Construction, Inc. | North Collins, NY 14111 | Gas Operator | Dec 2024 |
| 10553 | Fox Drilling Co | | Oil & Gas Operator | Oct 2015 |
| 10554 | Fox Jr Jimmy D | Bartlesville, OK 74003 | Oil & Gas Operator | Nov 2005 |
| 10555 | Fox Northeastern Oil & Gas Corp | Bartlesville, OK 74003-2226 | Oil & Gas Operator | Aug 2025 |
| 10556 | Fox Oil And Gas Inc | Houston, TX 77002 | Gas Operator | Dec 2002 |
| 10557 | Fox Oil, Inc. | Iowa Park, TX 76367 | Oil & Gas Operator | Feb 1999 |
| 10558 | Fox Operating Company | Dallas, TX 75240 | Oil & Gas Operator | Aug 2025 |
| 10559 | Fox Production Co LLC | Ardmore, OK 73401-6305 | Oil & Gas Operator | Aug 2009 |
| 10560 | Fox, Don | Chase, KS 67524 | Oil & Gas Operator | Jul 2006 |
| 10561 | Fox, Hewitt B., Inc. | Corpus Chrsti, TX 78411 | Oil & Gas Operator | Nov 2025 |
| 10562 | Fox, Warren F. Family Trust | Plains, KS 67869 | Oil Operator | Jun 2016 |
| 10563 | Foxborough Energy Company, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Nov 2025 |
| 10564 | Foxfire Expl. | | Oil Operator | Jun 1997 |
| 10565 | Foxfire Explorat | | Oil Operator | Dec 1986 |
| 10566 | Foxfire Productions, Inc. | Corsicana, TX 75110 | Oil Operator | Jul 2014 |
| 10567 | FP Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2008 |
| 10568 | FP Operations, LLC | Dallas, TX 75219 | Oil & Gas Operator | Jul 2025 |
| 10569 | Fpco Oil & Gas Co. | New Orleans, LA 70160 | Oil & Gas Operator | Jun 2025 |
| 10570 | Fraco Services, Inc. | Burkburnett, TX 76354 | Oil Operator | Nov 2025 |
| 10571 | Fractal Operating LLC | Ardmore, OK 73401-6515 | Gas Operator | Sep 2020 |
| 10572 | Fram Operating LLC | | Oil & Gas Operator | Dec 2018 |
| 10573 | Fran Oil, Inc. | | Oil & Gas Operator | Dec 2024 |
| 10574 | Frances Oil Co. | Corsicana, TX 75110 | Oil & Gas Operator | Nov 2025 |
| 10575 | Francis Oil & Gas, LLC | | Oil & Gas Operator | Jan 2011 |
| 10576 | Francis Well Service, Inc. | Sandyville, WV 25275 | Oil & Gas Operator | Dec 2021 |
| 10577 | Francis, Joseph | | Oil Operator | Dec 1982 |
| 10578 | Francis-Guido Oil Expl. Inc. | | Oil Operator | Feb 1986 |
| 10579 | Francis-Guido Operating Co Inc | | Oil & Gas Operator | Dec 1987 |
| 10580 | Francisco Creek Operating, Inc. | Castroville, TX 78009 | Oil Operator | Nov 2025 |
| 10581 | Frank B McGrath | | Gas Operator | Nov 2011 |
| 10582 | Frank B. Aumiller | | Oil Operator | Jun 1991 |
| 10583 | Frank Brendel Oil & Gas LLC | Canal Fulton, OH 44614-5817 | Oil & Gas Operator | Dec 2024 |
| 10584 | Frank C. VInson | | Oil & Gas Operator | May 1995 |
| 10585 | Frank H. Stephan Oil Group | | Oil Operator | Dec 2015 |
| 10586 | Frank Hale | | Oil & Gas Operator | Jan 2025 |
| 10587 | Frank J. Hall | | Oil & Gas Operator | Oct 1979 |
| 10588 | Frank L Washabaugh Oil Producers | Imperial, PA 15126-1050 | Oil & Gas Operator | Dec 2010 |
| 10589 | Frank Louis L | Kingsville, TX 78364 | Oil & Gas Operator | Aug 2003 |
| 10590 | Frank S. Moore | | Oil Operator | Feb 1990 |
| 10591 | Frank Spooner | | Oil & Gas Operator | Mar 1984 |
| 10592 | Frank T Fleet Inc | Ada, OK 74820 | Oil Operator | Jul 2025 |
| 10593 | Frank, Erwin | Bowling Green, KY 42101 | Oil Operator | Dec 2019 |
| 10594 | Franklin Calvin | | Oil Operator | Aug 1995 |
| 10595 | Franklin Donna | Gotebo, OK 73041 | Oil & Gas Operator | Jul 2025 |
| 10596 | Franklin Gas & Oil Co LLC | Wooster, OH 44691 | Oil & Gas Operator | Dec 2024 |
| 10597 | Franklin Oil Company | | Oil & Gas Operator | Dec 2005 |
| 10598 | Franklin Properties LLC | | Oil & Gas Operator | Aug 1998 |
| 10599 | Franklin, J.W. Oil Operator | | Oil & Gas Operator | Nov 2001 |
| 10600 | Franklin, Jack | Arlington, TX 76013 | Oil & Gas Operator | Nov 2007 |