| 801 | Freedom Oil Company LLC | | Oil Operator | Apr 2025 |
| 802 | Freedom Operating Company LLC | Tulsa, OK 74136-6834 | Oil & Gas Operator | May 2025 |
| 803 | Freeman Energy Inc. (I) | Fredericksbrg, TX 78624 | Oil & Gas Operator | Aug 1996 |
| 804 | Freeman Expl. & Prod. Co., Inc. | Houston, TX 77279 | Oil & Gas Operator | Aug 2020 |
| 805 | Freeman Oil | | Oil & Gas Operator | Jun 1995 |
| 806 | Freeman Oil Co | Midland, TX 79701 | Oil & Gas Operator | Sep 2014 |
| 807 | Freeman, James C. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Sep 2000 |
| 808 | Freeman, Kathleen Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 1996 |
| 809 | Freeman, Michael | Abilene, TX 79601 | Oil & Gas Operator | Jul 2025 |
| 810 | Freeport Oil Company | New Orleans, LA 70112 | Oil & Gas Operator | Oct 1979 |
| 811 | Freeport-McMoran Inc | New Orleans, LA 70160 | Oil & Gas Operator | Apr 1997 |
| 812 | Freeport-McMoran Oil & Gas Co. | | Oil & Gas Operator | Jan 1991 |
| 813 | Freeport-McMoran Oil & Gas LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 814 | Freestone Resources, Inc | Dallas, TX 75201 | Oil & Gas Operator | Jul 2025 |
| 815 | Fremen Walter E | Okmulgee, OK 74447 | Oil & Gas Operator | Apr 2025 |
| 816 | Fremont Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2004 |
| 817 | Fremont Energy Inc | University Heights, OH 44118-3818 | Oil & Gas Operator | Dec 2019 |
| 818 | Fremont Energy, L.P. | Dallas, TX 75225 | Oil & Gas Operator | Dec 1999 |
| 819 | Fremont Exploration, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Nov 2014 |
| 820 | French & Walker Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 1993 |
| 821 | French & Winters | | Oil Operator | Feb 1994 |
| 822 | French Creek Dev Inc | | Oil & Gas Operator | Dec 2006 |
| 823 | French Jr L R | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 824 | French Oil Inc | Lawton, OK 73501-9454 | Oil & Gas Operator | May 2025 |
| 825 | French Production Incorporated | Houston, TX 77086 | Oil & Gas Operator | Dec 1997 |
| 826 | French R B Exploration Co | Wichita Falls, TX 76308 | Oil Operator | Dec 1991 |
| 827 | French R E Oil C | | Oil Operator | Feb 1994 |
| 828 | Frerichs, Everett | | Oil Operator | Dec 2024 |
| 829 | Freshwater, Harold | Walker, WV 26180-0000 | Oil & Gas Operator | Dec 2021 |
| 830 | Fresno Oil Company | Iowa Park, TX 76367 | Oil & Gas Operator | Jul 2025 |
| 831 | Frewsburg Central School District | Frewsburg, NY 14738 | Gas Operator | Dec 2024 |
| 832 | Frey Well Drilling, Inc. | Alden, NY 14004 | Gas Operator | Dec 2024 |
| 833 | Frickey Investment MGT Co LLC | Lakewood, CO 80215 | Oil & Gas Operator | May 2025 |
| 834 | Friedel Petroleum Corp Inc | Edmond, OK 73012-3495 | Gas Operator | Apr 2025 |
| 835 | Friemel & Carpenter, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2002 |
| 836 | Friemel, Paul D. & Assoc., Inc. | Boerne, TX 78006 | Oil & Gas Operator | Mar 2007 |
| 837 | Friendly Energy Services, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Jul 2025 |
| 838 | Frierson & Kirchner | | Oil & Gas Operator | Mar 2007 |
| 839 | Frio Engineering Inc. | Houston, TX 77066 | Oil & Gas Operator | Jul 2025 |
| 840 | Frio Exploration Company | Pearland, TX 77588 | Oil & Gas Operator | Dec 2000 |
| 841 | Frio Exploration, L.L.C. | | Gas Operator | Aug 2000 |
| 842 | Frio Oil & Gas, LTD. | Austin, TX 78731 | Oil Operator | Jul 2025 |
| 843 | Frio Production Co. | Alice, TX 78333 | Oil & Gas Operator | Sep 1998 |
| 844 | Frio Resources, LLC | Houston, TX 77024 | Oil & Gas Operator | Jul 2025 |
| 845 | Frisco Energy, L.L.C. | Tulsa, OK 74105 | Oil & Gas Operator | May 2025 |
| 846 | Frisco Oil Corporation | Tyler, TX 75701 | Oil & Gas Operator | Mar 2000 |
| 847 | Frisco Petroleum Management, LLC | Frisco, TX 75034 | Oil & Gas Operator | Sep 2021 |
| 848 | Fritz & Digman Inc | | Oil Operator | May 2025 |
| 849 | Fritz Operating Company | | Oil & Gas Operator | Jun 1990 |
| 850 | Fritzler Resources Inc | Fort Morgan, CO 80701 | Oil & Gas Operator | Apr 2025 |
| 851 | Fritzler Trucking, Inc. | Ness City, KS 67560 | Oil Operator | Sep 2007 |
| 852 | Froelich Oil | | Oil Operator | Apr 2010 |
| 853 | Frog Island, L.L.C. | | Oil Operator | Jan 2025 |
| 854 | Fronczek, John & Diane | East Aurora, NY 14052 | Gas Operator | Dec 2024 |
| 855 | Front Street Operating, LLC | Sourlake, TX 77659 | Oil & Gas Operator | Jul 2025 |
| 856 | Frontier Central School District | Hamburg, NY 14075 | Gas Operator | Dec 2024 |
| 857 | Frontier Exploration, Inc. | | Oil & Gas Operator | Aug 1984 |
| 858 | Frontier Gas Operating Corp. | Houston, TX 77002 | Oil & Gas Operator | Jul 1998 |
| 859 | Frontier Land Company, Inc. | Leawood, KS 66206 | Oil Operator | Sep 2008 |
| 860 | Frontier Natural Resources | Bellefonte, PA 16823 | Gas Operator | May 2025 |
| 861 | Frontier Oil Com | | Oil & Gas Operator | May 1995 |
| 862 | Frontier Oil Company | | Oil Operator | Oct 1999 |
| 863 | Frontier Operating Corporation | Albany, TX 76430 | Oil & Gas Operator | Jul 2025 |
| 864 | Frontier Resources, Inc. | Dallas, TX 75214 | Oil & Gas Operator | Jul 2025 |
| 865 | Frontier, Inc. | | Oil Operator | Oct 1998 |
| 866 | Frost Black Creek Oil & Gas Production LLC | Frazeysburg, OH 43822 | Oil & Gas Operator | Dec 2024 |
| 867 | Frost Brothers Resources, LLLP | Fort Worth, TX 76101 | Gas Operator | Nov 2024 |
| 868 | Frost R Z & Assoc Inc | Chauncey, OH 45719 | Oil & Gas Operator | Dec 1988 |
| 869 | Frost, C.M., P.M. & V.W. | Simonton, TX 77476 | Oil & Gas Operator | Feb 2000 |
| 870 | Frost, Kenneth Oil & Gas Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 1995 |
| 871 | Frost, William B. And Lucile C. | Sinclairville, NY 14782 | Gas Operator | Dec 2024 |
| 872 | Frost,Cyrus B.,Jr.& Fleming, WM. | Eastland, TX 76448 | Oil & Gas Operator | May 2004 |
| 873 | Frostman Oil Corp | Hope, NM 882501567 | Oil & Gas Operator | Mar 2008 |
| 874 | Frostwood Energy, LLC | Houston, TX 77219 | Oil & Gas Operator | Jul 2025 |
| 875 | Fruehauf Antrim LP | | Gas Operator | Jan 2005 |
| 876 | Fruehauf H R Jr | | Gas Operator | Jan 2004 |
| 877 | Fruehauf Janet A Dba Top O Michigan Resources | | Gas Operator | Jan 2004 |
| 878 | Fruehauf LLC | Gaylord, MI 49735 | Oil Operator | Feb 2005 |
| 879 | Fruitvale Properties | | Oil & Gas Operator | Dec 1990 |
| 880 | FTC Consulting, LLC | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 881 | FTM Incorporated | Weatherford, TX 76086 | Gas Operator | Jul 2025 |
| 882 | Fuchs Sam Trust | Taos, NM 87571-6201 | Oil Operator | Dec 2000 |
| 883 | Fuego Energy, LLC | Fort Worth, TX 76136 | Oil Operator | Jul 2025 |
| 884 | Fuel Explor Inc (Fuelex) | | Oil & Gas Operator | Sep 1998 |
| 885 | Fuel Exploration Inc | Denver, CO 80295 | Oil & Gas Operator | Jan 1992 |
| 886 | Fuel Gas Technology, Inc | Westfield, NY 14787 | Gas Operator | Dec 2024 |
| 887 | Fuel Products, Inc. | Midland, TX 79702 | Oil Operator | Mar 2002 |
| 888 | Fuel Resources Development Co | Denver, CO 80202 | Oil & Gas Operator | Feb 1994 |
| 889 | Fueled Resources Inc | Boyd, TX 76023 | Oil & Gas Operator | Jul 2025 |
| 890 | Fugazzi Daniel B | Enid, OK 73703 | Gas Operator | Apr 2025 |
| 891 | Fugo Services Inc | McAlester, OK 74502-1429 | Oil & Gas Operator | Feb 1999 |
| 892 | Fuji Resources Production Co,Inc | Houston, TX 77036 | Oil & Gas Operator | Feb 2000 |
| 893 | Fuksa Investments Inc | Hennessey, OK 73742 | Oil & Gas Operator | May 2025 |
| 894 | Ful-Hill Oil & Gas, Inc. | Marshall, TX 75670 | Oil & Gas Operator | Aug 2003 |
| 895 | Ful-Hill Oil & Gas, L.L.P. | Overton, TX 75684 | Oil & Gas Operator | Jun 2016 |
| 896 | Fulcrum Energy Operating, LLC | Denver, CO 80206 | Oil & Gas Operator | Jul 2025 |
| 897 | Fulcrum Exploration, LLC. | Flower Mound, TX 75028 | Oil & Gas Operator | May 2025 |
| 898 | Fulfer Oil & Cattle LLC | Jal, NM 88252 | Oil & Gas Operator | May 2025 |
| 899 | Fulfer Oil And Cattle Co. | Jal, NM 88252 | Oil & Gas Operator | Jul 2025 |
| 900 | Fulfer, O. L. Operating Co., Inc | Iowa Park, TX 76367 | Oil & Gas Operator | Nov 1999 |