| 3901 | Fireside Oil And Gas, Inc. | West Monroe, LA 71294 | Oil & Gas Operator | Feb 2002 |
| 3902 | Firewheel Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Nov 2017 |
| 3903 | First American Operating Co. | Breckenridge, TX 76424 | Oil & Gas Operator | Aug 2006 |
| 3904 | First Aransas Reserves, Inc. | Alvin, TX 77511 | Oil & Gas Operator | Mar 2018 |
| 3905 | First Hardin Corp. | Fulshear, TX 77441 | Oil & Gas Operator | Nov 1994 |
| 3906 | First Permian, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 3907 | First Reserve Oil & Gas Co | Houston, TX 77002 | Oil & Gas Operator | Apr 2000 |
| 3908 | First Rock, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2025 |
| 3909 | First Solid Energy Group, LP | Missouri City, TX 77489 | Oil & Gas Operator | Apr 2025 |
| 3910 | First Source Gas, LP | Houston, TX 77010 | Gas Operator | Jan 2006 |
| 3911 | First Source Texas, Inc. | MT Pleasant, MI 48858 | Gas Operator | Nov 2004 |
| 3912 | First Texas Exploration Corp. | Arcadia, LA 71001 | Oil & Gas Operator | Aug 2003 |
| 3913 | Firstrike Energy Corporation | Cleburne, TX 76033 | Oil & Gas Operator | Jan 2025 |
| 3914 | Fischer Operating Corporation | Victoria, TX 77902 | Oil & Gas Operator | Jan 1999 |
| 3915 | Fiscus Drilling Co., Inc. | Clyde, TX 79510 | Oil & Gas Operator | Apr 2015 |
| 3916 | Fishcreek Minerals, LLC | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 3917 | Fisher Oil Co. | Big Lake, TX 76932 | Oil & Gas Operator | Apr 2025 |
| 3918 | Fisher, Jack Inc. | Abilene, TX 79603 | Oil & Gas Operator | Sep 2001 |
| 3919 | Fisher, L. C. Jr. | Longview, TX 75608 | Oil & Gas Operator | May 1993 |
| 3920 | Fite Oil & Gas, Inc. | Shreveport, LA 71163 | Oil & Gas Operator | Apr 2025 |
| 3921 | Fitts, B.K. Oil & Gas | Bowie, TX 76230 | Oil & Gas Operator | Apr 2025 |
| 3922 | Fitzgerald Production Co. | Oil City, LA 71061 | Oil & Gas Operator | Dec 2024 |
| 3923 | Five D Co | Cactus, TX 79013 | Oil & Gas Operator | Sep 1996 |
| 3924 | Five K Partnership | Graham, TX 76450 | Oil & Gas Operator | Oct 2023 |
| 3925 | Five Star Energy, Inc. | Seguin, TX 78155 | Oil & Gas Operator | Jan 2025 |
| 3926 | Five States Energy Company | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 3927 | Five States Operating Company | Dallas, TX 75206 | Oil & Gas Operator | Feb 2008 |
| 3928 | Five States Operating Company LLC | Dallas, TX 75206 | Oil & Gas Operator | Feb 2025 |
| 3929 | Five-Jab, Inc. | Tomball, TX 77377 | Oil & Gas Operator | Apr 2025 |
| 3930 | Fiveash Operating Company, Inc. | Christoval, TX 76935 | Oil & Gas Operator | Aug 2003 |
| 3931 | Fivestones Energy LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2025 |
| 3932 | FJH Oil Company | Muenster, TX 76252 | Oil & Gas Operator | Apr 2025 |
| 3933 | Fjo Energy, LLC | Fairhope, AL 36532 | Oil Operator | Apr 2025 |
| 3934 | Flag Energy, LLC | Centerton, AR 72719 | Oil & Gas Operator | Nov 2018 |
| 3935 | Flairtex Resources, Inc. | Houston, TX 77040 | Oil & Gas Operator | Oct 1998 |
| 3936 | Flamingo Oil & Gas | Luling, TX 78648 | Oil & Gas Operator | Apr 2025 |
| 3937 | Flamingo Operating, LLC | Houston, TX 77084 | Oil & Gas Operator | Apr 2025 |
| 3938 | Flare Oil Inc | Rockport, TX 78382 | Oil & Gas Operator | Apr 2025 |
| 3939 | Flare Resources Inc. | Houston, TX 77002 | Gas Operator | Jun 2006 |
| 3940 | Flash Gas & Oil Southwest, Inc. | Mandeville, LA 70470 | Oil & Gas Operator | Oct 2019 |
| 3941 | Flat Creek Resources, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2025 |
| 3942 | Flat Top Operating, LLC | Midland, TX 79707 | Oil & Gas Operator | Apr 2025 |
| 3943 | Flatonia Energy, LLC | Dallas, TX 75201 | Oil & Gas Operator | Apr 2025 |
| 3944 | Flavian Oil Company | Dallas, TX 75206 | Gas Operator | Jan 1997 |
| 3945 | Fletcher Operating, LLC | Fairhope, AL 36533 | Oil & Gas Operator | Apr 2025 |
| 3946 | Fletcher Petroleum Corp. | Fairhope, AL 36533 | Oil & Gas Operator | Feb 2025 |
| 3947 | Fletcher, M. D. | Pampa, TX 79065 | Oil & Gas Operator | Dec 2007 |
| 3948 | Flint Interests, LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2025 |
| 3949 | Flint Oak Energy, LLC | Montgomery, TX 77356 | Oil & Gas Operator | Apr 2025 |
| 3950 | Flint Oil & Gas | San Angelo, TX 76904 | Oil & Gas Operator | Aug 2003 |
| 3951 | Flint Pipeline Company | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 3952 | Flint Rock Resources MGMNT, Inc. | Austin, TX 78734 | Oil & Gas Operator | Apr 2025 |
| 3953 | Flint, Billy Individual | Merkel, TX 79536 | Oil & Gas Operator | Apr 2025 |
| 3954 | Flo A & P Inc. | Seminole, TX 79360 | Oil & Gas Operator | Feb 2024 |
| 3955 | Flo Petro, LLC. | Austin, TX 78746 | Oil Operator | Apr 2025 |
| 3956 | Floex Energy LLC | Tyler, TX 75701 | Oil Operator | Apr 2025 |
| 3957 | Flournoy Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 3958 | Flournoy Production Co. | Alice, TX 78333 | Oil & Gas Operator | Dec 2002 |
| 3959 | Flournoy, Russell B. | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2020 |
| 3960 | Flow Energy Inc. | Bellaire, TX 77401 | Oil & Gas Operator | Sep 1996 |
| 3961 | Flow Production Company | Midland, TX 79708 | Oil & Gas Operator | Mar 2005 |
| 3962 | Floyd Oil Company | Houston, TX 77002 | Oil & Gas Operator | Nov 1999 |
| 3963 | Floyd Operating Company | Houston, TX 77002 | Oil & Gas Operator | Jul 2004 |
| 3964 | Floyd, Timber Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 3965 | Flusche Brothers | Muenster, TX 76252 | Oil & Gas Operator | Apr 2025 |
| 3966 | Flusche Properties, L.L.C. | Electra, TX 76360 | Oil & Gas Operator | Jan 2017 |
| 3967 | Flusche Supply, Inc. | Electra, TX 76360 | Oil & Gas Operator | Aug 1994 |
| 3968 | Flusche, Herb | Wichita Falls, TX 76309 | Oil & Gas Operator | Mar 2005 |
| 3969 | Flux Energy LLC | Spring, TX 77379 | Oil & Gas Operator | Apr 2025 |
| 3970 | Flying W Resources, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 3971 | Flynn, Ben A. Trustee | Coleman, TX 76834 | Oil & Gas Operator | Jul 2001 |
| 3972 | FMD Oil Co. | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2020 |
| 3973 | Foag, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2022 |
| 3974 | Focus Energy, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2019 |
| 3975 | Follett Operating Co. | Darrouzett, TX 79024 | Oil & Gas Operator | Jun 2019 |
| 3976 | Foothill Energy, LLC | Spring, TX 77393 | Oil & Gas Operator | Apr 2025 |
| 3977 | Foothills Texas, Inc. | Houston, TX 77269 | Oil & Gas Operator | Aug 2019 |
| 3978 | Fora Company | Borger, TX 79007 | Oil & Gas Operator | Apr 2025 |
| 3979 | Forbes Producing, LLC | Corpus Chrsti, TX 78410 | Oil Operator | Apr 2025 |
| 3980 | Forbes, C. C. Company | Alice, TX 78333 | Oil & Gas Operator | Sep 2015 |
| 3981 | Forbes, Charles C. | Hebbronville, TX 78361 | Oil & Gas Operator | Jul 2011 |
| 3982 | Force 4 Energy Resources, Inc. | Austin, TX 78733 | Oil & Gas Operator | Aug 2005 |
| 3983 | Force 5 Energy, LLC | Houston, TX 77090 | Oil & Gas Operator | Dec 2018 |
| 3984 | Forcenergy Gas Exploration Inc. | Miami, FL 33129 | Oil & Gas Operator | Aug 1996 |
| 3985 | Forcenergy Inc | Miami, FL 33129 | Oil & Gas Operator | Mar 2015 |
| 3986 | Forcenergy Onshore Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2012 |
| 3987 | Ford, Don H. & Assoc. | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2025 |
| 3988 | Ford, R. J. Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2025 |
| 3989 | Fordyce Oil & Gas | Sullivan City, TX 78595 | Oil & Gas Operator | Jul 2022 |
| 3990 | Fore Oil, LLC | Manvel, TX 77578 | Oil Operator | May 2021 |
| 3991 | Foree Oil Company | Terrell, TX 75160 | Oil & Gas Operator | Apr 2025 |
| 3992 | Foree, R. L. Trust "A" | Dallas, TX 75225 | Oil & Gas Operator | Dec 1999 |
| 3993 | Foreland Operating, LLC | Royse City, TX 75189 | Oil & Gas Operator | Oct 2021 |
| 3994 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 3995 | Forest Oil Permian Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 3996 | Forestar Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2016 |
| 3997 | Forestar Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2017 |
| 3998 | Forge Energy Operating, LLC | San Antonio, TX 78249 | Oil & Gas Operator | Jun 2023 |
| 3999 | Forge Energy, LLC | San Antonio, TX 78249 | Oil & Gas Operator | Apr 2019 |
| 4000 | Formation Recovery LLC | Weatherford, TX 76087 | Oil & Gas Operator | Apr 2025 |