| 901 | Ful-Hill Oil & Gas, Inc. | Marshall, TX 75670 | Oil & Gas Operator | Aug 2003 |
| 902 | Ful-Hill Oil & Gas, L.L.P. | Overton, TX 75684 | Oil & Gas Operator | Jun 2016 |
| 903 | Fulcrum Energy Operating, LLC | Denver, CO 80206 | Oil & Gas Operator | Dec 2025 |
| 904 | Fulcrum Exploration, LLC. | Flower Mound, TX 75028 | Oil & Gas Operator | Aug 2025 |
| 905 | Fulfer Oil & Cattle LLC | Jal, NM 88252 | Oil & Gas Operator | Sep 2025 |
| 906 | Fulfer Oil And Cattle Co. | Jal, NM 88252 | Oil & Gas Operator | Dec 2025 |
| 907 | Fulfer, O. L. Operating Co., Inc | Iowa Park, TX 76367 | Oil & Gas Operator | Nov 1999 |
| 908 | Fuller Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 1995 |
| 909 | Fuller Oil | Iola, KS 66749 | Oil Operator | Jun 2001 |
| 910 | Fuller Operating Company | Lubbock, TX 79408 | Oil & Gas Operator | Mar 2008 |
| 911 | Fuller Petroleum Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 912 | Fuller Production, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 913 | Fullerton Energy Corporation | Dallas, TX 75230 | Oil & Gas Operator | Apr 2002 |
| 914 | Fullerton, B. N. | San Angelo, TX 76904 | Oil & Gas Operator | Jul 1994 |
| 915 | Fullspike Energy LLC | Boyd, TX 76023 | Oil & Gas Operator | Dec 2025 |
| 916 | Fulmer Valley Resources, LTD. | Wellsville, NY 14895 | Oil & Gas Operator | Dec 2024 |
| 917 | Fulshear Oil & Gas Partners LP | Houston, TX 77002 | Gas Operator | Apr 2018 |
| 918 | Fulton Fuel Company | Shelby, MT 59474 | Oil & Gas Operator | Jul 2025 |
| 919 | Fulton Producing Co. | Shelby, MT 59474-0603 | Oil & Gas Operator | Feb 2005 |
| 920 | Fulton, William M. | Shelby, MT 59474 | Oil & Gas Operator | Feb 2005 |
| 921 | Fultz Oil Company | Fort Worth, TX 76121 | Oil & Gas Operator | Dec 1995 |
| 922 | Fun Investments, L.L.C. | | Oil & Gas Operator | Jan 2025 |
| 923 | Fundare Resources Operating Company LLC | | Oil & Gas Operator | Sep 2025 |
| 924 | Funk Oil & Operating, LLC | Russell, KS 67665 | Oil Operator | Jul 2024 |
| 925 | Furie Operating Alaska, LLC | | Gas Operator | Oct 2025 |
| 926 | Furie Operating, LLC | League City, TX 77573 | Oil & Gas Operator | Nov 2015 |
| 927 | Furr, Roy Estate Of | Midland, TX 79702 | Oil & Gas Operator | Jun 2016 |
| 928 | Furrh Inc. | | Oil Operator | Apr 1994 |
| 929 | Furry Oil & Gas, Inc. | Bangs, TX 76823 | Oil & Gas Operator | Dec 2025 |
| 930 | Furry Operating Account | Brownwood, TX 76804 | Oil & Gas Operator | Aug 2003 |
| 931 | Furry Producing Company | Brownwood, TX 76801 | Oil & Gas Operator | Dec 2025 |
| 932 | Furry, Myrl M. | Brownwood, TX 76801 | Oil & Gas Operator | Dec 2003 |
| 933 | Further Developm | | Oil Operator | Apr 1986 |
| 934 | Fuse Energy, LLC | Alvord, TX 76225 | Oil & Gas Operator | Jan 2019 |
| 935 | Fusion Energy Holdings, LLC | Throckmorton, TX 76483 | Oil Operator | Dec 2025 |
| 936 | Fusion XP, Inc. | Arlington, TX 76006 | Oil Operator | Apr 2014 |
| 937 | Future Energy Corp | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1991 |
| 938 | Future Energy Li | | Oil Operator | Nov 1991 |
| 939 | Future Energy Partners | Bartlesville, OK 74005 | Oil & Gas Operator | Feb 2017 |
| 940 | Future Oil & Gas, Inc. | | Oil & Gas Operator | Mar 2010 |
| 941 | Future Petroleum Company LLC | Houston, TX 77027 | Oil & Gas Operator | Jun 2013 |
| 942 | Future Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 1999 |
| 943 | Future Production Inc | Canton, OH 44708 | Oil & Gas Operator | Dec 2023 |
| 944 | FWB Petroleum, Inc. | Euless, TX 76040 | Oil & Gas Operator | Dec 2000 |
| 945 | FWF Exploration Inc | | Oil Operator | Oct 1994 |
| 946 | FX Drilling Company, Inc. | Cut Bank, MT 59427 | Oil & Gas Operator | Sep 2025 |
| 947 | FX Energy Operating, LLC | Canadian, TX 79014 | Oil & Gas Operator | Dec 2025 |
| 948 | Fyler Oil, LLC | McPherson, KS 67460 | Oil Operator | Jun 2025 |
| 949 | Fyler, M. A. | Rangley, CO 81648 | Oil Operator | Mar 1988 |