| 9901 | Feazel Operating Company, Inc. | | Oil & Gas Operator | Feb 1979 |
| 9902 | Fed Operating LLC | Midland, TX 79701 | Oil & Gas Operator | May 2026 |
| 9903 | Federal Energy Development Co. | Dallas, TX 75205 | Oil & Gas Operator | Mar 2011 |
| 9904 | Federal Hill Land Co., Inc. | | Gas Operator | Apr 1991 |
| 9905 | Federal Oil & Gas - Rood L L C | | Oil & Gas Operator | Feb 2026 |
| 9906 | Federal Oil, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | May 2026 |
| 9907 | Federated Natural Resources Corp | | Oil & Gas Operator | Oct 1989 |
| 9908 | Federated Natural Resources Corp And Fede | | Oil & Gas Operator | Feb 1989 |
| 9909 | Federated Oil & Gas Properties | Traverse City, MI 49685 | Gas Operator | Mar 2014 |
| 9910 | Federated Oil And Gas Properties Inc | | Oil & Gas Operator | Mar 2026 |
| 9911 | Federer, H. C. | Amarillo, TX 79101 | Oil & Gas Operator | Dec 1993 |
| 9912 | Fee Energy Corporation | | Oil & Gas Operator | Jul 1978 |
| 9913 | Fees Jr And Son Oil & Gas* Walter S | | Oil & Gas Operator | Jan 2026 |
| 9914 | Feezel A L LLC | Ada, OK 74821-1371 | Oil & Gas Operator | Mar 2015 |
| 9915 | Feikls Oil & Gas Inc | Eagle, ID 83616-7713 | Oil & Gas Operator | Dec 2025 |
| 9916 | Feinen, Richard C. | Forestville, NY 14062 | Gas Operator | Dec 2024 |
| 9917 | Feldco, Inc. | | Oil & Gas Operator | Apr 2007 |
| 9918 | Felderhoff Bros Drilling Co Inc Dba Felderhoff Production Company | Muenster, TX 76252 | Oil Operator | Jan 2026 |
| 9919 | Felderhoff Production Company | Muenster, TX 76252 | Oil & Gas Operator | May 2026 |
| 9920 | Felix Energy Holdings II, LLC | Tulsa, OK 74172 | Oil & Gas Operator | Apr 2020 |
| 9921 | Felix Energy LLC | Denver, CO 80202-1467 | Oil & Gas Operator | Jan 2026 |
| 9922 | Fell Oil & Gas C | | Oil Operator | Oct 1991 |
| 9923 | Fell Oil And Gas Inc | Tulsa, OK 74157-9487 | Oil & Gas Operator | Aug 2016 |
| 9924 | Fell, Clarence | | Gas Operator | Dec 1972 |
| 9925 | Fell-Brecklein-Town Oil Co. | | Oil Operator | Dec 1975 |
| 9926 | Fellows Energy LTD | Price, UT 84501-2016 | Gas Operator | Sep 2007 |
| 9927 | Felmont Oil Corporation | Walnut Creek, CA 94596-3568 | Oil & Gas Operator | Feb 1990 |
| 9928 | Felty Drilling Co. Inc | Burkburnett, TX 76354 | Oil & Gas Operator | May 2026 |
| 9929 | Felty Production, Inc. | Burkburnett, TX 76354 | Oil Operator | May 2026 |
| 9930 | Felty, F. T. Operating Company | Burkburnett, TX 76354 | Oil & Gas Operator | Jul 2018 |
| 9931 | Femco Services Inc | Lindsay, OK 73052-0632 | Oil & Gas Operator | Nov 2006 |
| 9932 | Femco SWD Inc | Enid, OK 73702-3907 | Oil Operator | Mar 2014 |
| 9933 | Fender Expl & Prod Co., L.L.C. | Tyler, TX 75710 | Oil & Gas Operator | Sep 2004 |
| 9934 | Fender, Mildred A. | Russell, KS 67665 | Oil & Gas Operator | Jun 2000 |
| 9935 | Fenix Petroleum Group LLC | Washington, TX 77880 | Oil Operator | Jul 2019 |
| 9936 | Fenn, Bill Inc. | Giddings, TX 78942 | Oil & Gas Operator | Mar 2008 |
| 9937 | Fenno, Tom Prod. | FT Collins, CO 80524 | Oil & Gas Operator | Mar 2018 |
| 9938 | Fenoglio Oil Company | Nocona, TX 76255 | Oil Operator | May 2026 |
| 9939 | Fenoglio, Donnie Oil Company | Nocona, TX 76255 | Oil & Gas Operator | Feb 2014 |
| 9940 | Fenway Energy Development Co. | Midland, TX 79701 | Oil & Gas Operator | May 2026 |
| 9941 | Ferenbaugh Albert & Denise | Danville, OH 43014 | Oil & Gas Operator | Dec 2025 |
| 9942 | Fergus Oil & Gas, LLC | Allen, TX 75013 | Oil Operator | May 2026 |
| 9943 | Ferguson & Bosworth | | Oil & Gas Operator | May 2007 |
| 9944 | Ferguson Bob | Casper, WY 82605 | Oil Operator | May 2004 |
| 9945 | Ferguson Energy Inc | Evanston, WY 82930 | Oil & Gas Operator | Dec 2025 |
| 9946 | Ferguson Oil & Gas Inc. | Austin, TX 78746 | Oil & Gas Operator | May 2026 |
| 9947 | Ferguson Oil Company Inc | | Oil & Gas Operator | Apr 1994 |
| 9948 | Ferguson Orval L | | Oil & Gas Operator | Oct 1983 |
| 9949 | Ferguson, S. M. Jr., Inc. | Dallas, TX 75218 | Oil & Gas Operator | May 2026 |
| 9950 | Ferguson-Burns Leasing Co. | Rockdale, TX 76567 | Oil & Gas Operator | Oct 2007 |
| 9951 | Ferguson-Hunter Explor Inc | N Little Rock, AR 72120-1667 | Oil & Gas Operator | Aug 2016 |
| 9952 | Fernwood Corporation | | Oil Operator | Dec 1986 |
| 9953 | Ferraro Energy Corporation | Oklahoma City, OK 73114-6629 | Oil & Gas Operator | Aug 2013 |
| 9954 | Ferreira Oil Properties LLC | Carefree, AZ 85377 | Oil Operator | Apr 2014 |
| 9955 | Ferris, Wakyn W. | Denver, CO 80202 | Oil Operator | Jun 1988 |
| 9956 | Ferry Lake Oil Co. | | Oil & Gas Operator | Jan 2025 |
| 9957 | Fesco, LTD. | Alice, TX 78332 | Oil Operator | May 2026 |
| 9958 | Fetterman Samuel C SR | Rossiter, PA 15772 | Gas Operator | Dec 2025 |
| 9959 | Fewins, Gary D. | Moran, KS 66755 | Oil Operator | Jul 2019 |
| 9960 | FF&N Oil Company | Spearsville, LA 71277 | Oil Operator | Jan 2025 |
| 9961 | Ffa Petroleum Services | Victoria, TX 77903 | Oil & Gas Operator | Sep 2001 |
| 9962 | Ffa Petroleum Services, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Feb 2018 |
| 9963 | FG III LLC | Colleyville, TX 76034-4963 | Oil & Gas Operator | Apr 2018 |
| 9964 | FGB Energy, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2017 |
| 9965 | FGS Energy LLC | Duncan, OK 73533-1829 | Oil & Gas Operator | Jan 2026 |
| 9966 | FH Operation Company, Inc. | Dallas, TX 75381 | Oil & Gas Operator | Apr 2005 |
| 9967 | FH Petroleum Corp. | Billings, MT 59103 | Oil & Gas Operator | Oct 2025 |
| 9968 | Fha Investments LLC | Cushing, OK 74023 | Oil & Gas Operator | Feb 2026 |
| 9969 | Fha Operating LLC | Cushing, OK 74023-1030 | Oil & Gas Operator | Feb 2026 |
| 9970 | Fi-Ro Corporation | Natchez, MS BADADDR | Oil & Gas Operator | Nov 2001 |
| 9971 | Fidelity E&P Company | Denver, CO 80202 | Oil & Gas Operator | Feb 2016 |
| 9972 | Fidelity Energy Co. | Gainesville, TX 76241 | Oil & Gas Operator | Apr 2008 |
| 9973 | Fidelity Energy, Inc. | Houston, TX 77055 | Oil & Gas Operator | Dec 2009 |
| 9974 | Fidelity Explor. & Prod. Co. | Denver, CO 80202 | Oil & Gas Operator | Nov 2015 |
| 9975 | Fidelity Exploration & Production Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2026 |
| 9976 | Fidelity Petroleum Corporation | Plano, TX 75074 | Oil & Gas Operator | May 2026 |
| 9977 | Fidgets Energy LLC | Checotah, OK 74426-5309 | Oil Operator | Oct 2024 |
| 9978 | Field Petroleum Corp. | San Antonio, TX 78216 | Oil & Gas Operator | May 2026 |
| 9979 | Field Production Company | Cleburne, TX 76033 | Oil & Gas Operator | Mar 2023 |
| 9980 | Field Service, Inc. | West Seneca, NY 14206 | Gas Operator | Dec 2024 |
| 9981 | Fields Exploration, Inc. | Corpus Christ, TX 78401 | Oil & Gas Operator | Aug 2015 |
| 9982 | Fields Oil & Gas Company, LLC | Dallas, TX 75230 | Oil & Gas Operator | May 2026 |
| 9983 | Fields, Bert, Jr. | Dallas, TX 75230 | Oil & Gas Operator | Apr 2015 |
| 9984 | Fieldstone Exploration Company | | Oil & Gas Operator | Jan 2007 |
| 9985 | Fieldwood Energy LLC | Houston, TX 77042 | Oil & Gas Operator | Dec 2024 |
| 9986 | Fieldwood Energy Offshore LLC | Houston, TX 77042 | Oil & Gas Operator | May 2026 |
| 9987 | Fieldwood Onshore LLC | Houston, TX 77098 | Oil & Gas Operator | May 2026 |
| 9988 | Fiesta Energy LLC | Corpus Christ, TX 78404 | Oil & Gas Operator | May 2026 |
| 9989 | Fife Oil & Gas | | Oil Operator | Oct 1987 |
| 9990 | Fife Oil & Gas, Inc. | | Oil Operator | Mar 1991 |
| 9991 | Fife Oil Company, Inc. | | Oil & Gas Operator | Feb 2008 |
| 9992 | Fifty Third Corp. & K.M.O.C. | | Gas Operator | Jul 1994 |
| 9993 | Fifty-Third Corporation | | Gas Operator | Jul 1994 |
| 9994 | Figgie Natural Resources | Wickliffe, OH 44092 | Oil & Gas Operator | Oct 1995 |
| 9995 | Figure 3 Operating LLC | Tyler, TX 75703 | Oil Operator | Dec 2024 |
| 9996 | Filco Incorporated | | Oil & Gas Operator | Feb 2026 |
| 9997 | Fiml Natural Resources LLC (FNR) | Denver, CO 80202-4438 | Oil & Gas Operator | Jul 2014 |
| 9998 | Fiml Natural Resources, LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2014 |
| 9999 | Fin Energy, LLC | Wichita Falls, TX 76308 | Oil Operator | May 2026 |
| 10000 | Fin-Oil, Inc. | | Oil & Gas Operator | Apr 1985 |