| 1 | F & F Drilling Company | | Oil Operator | Apr 1991 |
| 2 | F & H Production | | Oil & Gas Operator | Apr 2014 |
| 3 | F H Walsh Jr Operating Co Inc | | Oil & Gas Operator | Jul 1995 |
| 4 | F Howard Walsh Jr | | Oil & Gas Operator | Aug 1992 |
| 5 | F R Etchen, Jr | | Oil & Gas Operator | Sep 1985 |
| 6 | F W Rabalais, Inc. | | Oil & Gas Operator | Dec 2014 |
| 7 | F. E. Hargraves | | Oil Operator | Mar 1983 |
| 8 | F.A.S. Environmental Services, L.L.C. | | Oil Operator | Jan 2025 |
| 9 | F.E.Hargraves &Sons DRL.Co.Inc. | | Oil & Gas Operator | Mar 1992 |
| 10 | F.S.M. Oil Co. | | Oil Operator | Aug 1979 |
| 11 | Fair Oil Company | Tyler, TX 75710 | Oil & Gas Operator | Dec 2000 |
| 12 | Fair Oil, LC | Tyler, TX 75710 | Oil & Gas Operator | Oct 2001 |
| 13 | Fair Oil, LTD. | Tyler, TX 75710 | Oil & Gas Operator | Dec 2025 |
| 14 | Fairfield Energy Corp. | Dallas, TX 75205 | Oil & Gas Operator | Dec 2025 |
| 15 | Fairview Producing Corp. | | Oil Operator | Jul 2001 |
| 16 | Fairway Resources Operating, LLC | Southlake, TX 76092 | Oil & Gas Operator | Aug 2022 |
| 17 | Faith Energy, L.L.C. | | Oil & Gas Operator | Jan 2025 |
| 18 | Faith Oil Of Hosston | | Oil Operator | Feb 1996 |
| 19 | Falco S & D, Inc. | Shreveport, LA 71107 | Oil & Gas Operator | Apr 1998 |
| 20 | Falcon Bay Operations, LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2007 |
| 21 | Falcon Oil & Gas Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Nov 2022 |
| 22 | Famcor Oil, Inc. | Scottsdale, AZ 85260 | Oil & Gas Operator | Sep 2020 |
| 23 | Family Oil Company | | Oil Operator | Jan 2025 |
| 24 | Fantasy Oil & Gas Ventures, L.L.C. | | Oil Operator | Dec 2024 |
| 25 | Fantome, LLC | | Oil Operator | Jan 2007 |
| 26 | Far West Development, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2025 |
| 27 | Fas Services, Inc. | | Oil Operator | Apr 2005 |
| 28 | Faul Energy, Inc. | | Oil & Gas Operator | Oct 1988 |
| 29 | Fay A. Williams | | Oil & Gas Operator | Dec 2024 |
| 30 | Fear & Duncan | | Oil Operator | Jul 1979 |
| 31 | Feazel Operating Company, Inc. | | Oil & Gas Operator | Feb 1979 |
| 32 | Fee Energy Corporation | | Oil & Gas Operator | Jul 1978 |
| 33 | Feldco, Inc. | | Oil & Gas Operator | Apr 2007 |
| 34 | Felmont Oil Corporation | Walnut Creek, CA 94596-3568 | Oil & Gas Operator | Feb 1990 |
| 35 | Ferguson Oil Company Inc | | Oil & Gas Operator | Apr 1994 |
| 36 | Fernwood Corporation | | Oil Operator | Dec 1986 |
| 37 | Ferry Lake Oil Co. | | Oil & Gas Operator | Jan 2025 |
| 38 | Fi-Ro Corporation | Natchez, MS BADADDR | Oil & Gas Operator | Nov 2001 |
| 39 | Field Petroleum Corp. | San Antonio, TX 78216 | Oil & Gas Operator | Dec 2025 |
| 40 | Fieldwood Energy LLC | Houston, TX 77042 | Oil & Gas Operator | Dec 2024 |
| 41 | Fieldwood Energy Offshore LLC | Houston, TX 77042 | Oil & Gas Operator | Dec 2025 |
| 42 | Fieldwood Onshore LLC | Houston, TX 77098 | Oil & Gas Operator | Dec 2025 |
| 43 | Fife Oil & Gas | | Oil Operator | Oct 1987 |
| 44 | Fife Oil & Gas, Inc. | | Oil Operator | Mar 1991 |
| 45 | Fife Oil Company, Inc. | | Oil & Gas Operator | Feb 2008 |
| 46 | Fifty Third Corp. & K.M.O.C. | | Gas Operator | Jul 1994 |
| 47 | Fifty-Third Corporation | | Gas Operator | Jul 1994 |
| 48 | Fin-Oil, Inc. | | Oil & Gas Operator | Apr 1985 |
| 49 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 50 | Fina Oil& Chem Co/Marathon Oil | | Oil & Gas Operator | Dec 1992 |
| 51 | Finaly Resources LLC | Sunset Beach, CA 90742 | Oil & Gas Operator | Dec 2025 |
| 52 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Dec 2025 |
| 53 | Fireside Oil And Gas, Inc. | West Monroe, LA 71294 | Oil & Gas Operator | Feb 2002 |
| 54 | First Energy Corporation | | Oil & Gas Operator | Jun 1993 |
| 55 | First Energy Development Corp. | | Oil & Gas Operator | Sep 2008 |
| 56 | Firstrike Energy Corporation | Cleburne, TX 76033 | Oil & Gas Operator | Jan 2025 |
| 57 | Fisher Joint Venture | | Oil & Gas Operator | Oct 1998 |
| 58 | Fite Oil & Gas, Inc. | Shreveport, LA 71163 | Oil & Gas Operator | Dec 2025 |
| 59 | Fitzgerald Production Co. | Oil City, LA 71061 | Oil & Gas Operator | Dec 2024 |
| 60 | Five States Energy Company | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 61 | Five States Operating Company | Dallas, TX 75206 | Oil & Gas Operator | Feb 2008 |
| 62 | Five-Jab, Inc. | Tomball, TX 77377 | Oil & Gas Operator | Dec 2025 |
| 63 | Flash Gas & Oil Northeast, Inc | | Oil & Gas Operator | May 2007 |
| 64 | Flash Gas & Oil Southwest, Inc. | Mandeville, LA 70470 | Oil & Gas Operator | Oct 2019 |
| 65 | Flash Gas & Oil, Inc. | | Oil & Gas Operator | May 1991 |
| 66 | Flatwater Energy, LLC | | Oil & Gas Operator | Dec 2024 |
| 67 | Fletcher Operating Co. | | Oil & Gas Operator | May 1989 |
| 68 | Flex Energy, L.L.C. | | Oil & Gas Operator | Feb 2010 |
| 69 | Flora B Shinnick | | Oil Operator | Jan 2025 |
| 70 | Flores & Rucks, Inc. | | Oil & Gas Operator | Jun 1997 |
| 71 | Florida Exploration Co | Aurora, CO 80014 | Oil & Gas Operator | Sep 1989 |
| 72 | Florida Gas Transmission Co. | | Oil Operator | Dec 2007 |
| 73 | Flourison Oil & Gas, LLC | | Oil Operator | Jan 2025 |
| 74 | Floyd Oil Company | Houston, TX 77002 | Oil & Gas Operator | Nov 1999 |
| 75 | Floyd Ray Porter | | Oil & Gas Operator | Nov 1986 |
| 76 | Floyd Williams | | Oil Operator | Aug 1988 |
| 77 | Flynn Energy Corporation | Tulsa, OK 74137 | Oil & Gas Operator | Mar 1993 |
| 78 | FMP Operating Company, LTD PTN | | Oil & Gas Operator | Mar 1990 |
| 79 | Fne Operating LLC | | Oil Operator | Dec 2024 |
| 80 | Focus Energy, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2019 |
| 81 | Fod Oil Company | | Oil Operator | May 1999 |
| 82 | Fontainebleau Operating, LLC | | Oil & Gas Operator | Dec 2024 |
| 83 | Fontenot Pet Land Services, Inc. | | Oil & Gas Operator | Aug 2002 |
| 84 | Forcenergy Gas Exploration Inc. | Miami, FL 33129 | Oil & Gas Operator | Aug 1996 |
| 85 | Forcenergy Inc | Miami, FL 33129 | Oil & Gas Operator | Mar 2015 |
| 86 | Fordoche Operating Company, LLC | | Oil & Gas Operator | Nov 2024 |
| 87 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 88 | Forexco, Inc. | Greensboro, NC 27438 | Oil & Gas Operator | Dec 2020 |
| 89 | Forman Exploration Company | | Oil & Gas Operator | Oct 1988 |
| 90 | Forman Petroleum Corporation | | Oil & Gas Operator | Aug 2001 |
| 91 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | Dec 2025 |
| 92 | Forrest Exploration & Dev, LLC | | Gas Operator | May 2003 |
| 93 | Fort Apache Energy, Inc. | Boerne, TX 78015 | Oil & Gas Operator | Dec 2025 |
| 94 | Fortenberry Operating Co., Inc | | Oil & Gas Operator | Nov 2003 |
| 95 | Fortenbery Drilling Co., Inc. | | Oil & Gas Operator | Oct 1979 |
| 96 | Fortuna Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2014 |
| 97 | Fortune Gas & Oil, Inc. | | Oil & Gas Operator | Apr 2004 |
| 98 | Fortune Operating Company | Willis, TX 77378 | Oil & Gas Operator | Dec 2025 |
| 99 | Fortune Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Dec 2025 |
| 100 | Fortune-Shelby | | Oil & Gas Operator | Mar 1989 |