| 4001 | Five-Jab, Inc. | Tomball, TX 77377 | Oil & Gas Operator | Feb 2026 |
| 4002 | Fiveash Operating Company, Inc. | Christoval, TX 76935 | Oil & Gas Operator | Aug 2003 |
| 4003 | Fivestones Energy LLC | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 4004 | FJH Oil Company | Muenster, TX 76252 | Oil & Gas Operator | Feb 2026 |
| 4005 | Fjo Energy, LLC | Fairhope, AL 36532 | Oil Operator | Feb 2026 |
| 4006 | Flag Energy, LLC | Centerton, AR 72719 | Oil & Gas Operator | Nov 2018 |
| 4007 | Flairtex Resources, Inc. | Houston, TX 77040 | Oil & Gas Operator | Oct 1998 |
| 4008 | Flamingo Oil & Gas | Luling, TX 78648 | Oil & Gas Operator | Feb 2026 |
| 4009 | Flamingo Operating, LLC | Houston, TX 77084 | Oil & Gas Operator | Feb 2026 |
| 4010 | Flare Oil Inc | Rockport, TX 78382 | Oil & Gas Operator | Feb 2026 |
| 4011 | Flare Resources Inc. | Houston, TX 77002 | Gas Operator | Jun 2006 |
| 4012 | Flash Gas & Oil Southwest, Inc. | Mandeville, LA 70470 | Oil & Gas Operator | Oct 2019 |
| 4013 | Flat Creek Operating Co. | Rockwall, TX 75087 | Oil & Gas Operator | Jun 2004 |
| 4014 | Flat Creek Resources, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 4015 | Flat Top Operating, LLC | Midland, TX 79707 | Oil & Gas Operator | Feb 2026 |
| 4016 | Flatonia Energy, LLC | Dallas, TX 75201 | Oil & Gas Operator | Feb 2026 |
| 4017 | Flavian Oil Company | Dallas, TX 75206 | Gas Operator | Jan 1997 |
| 4018 | Fletcher Operating, LLC | Fairhope, AL 36532 | Oil & Gas Operator | Feb 2026 |
| 4019 | Fletcher Petroleum Corp. | Fairhope, AL 36533 | Oil & Gas Operator | Dec 2025 |
| 4020 | Fletcher, M. D. | Pampa, TX 79065 | Oil & Gas Operator | Dec 2007 |
| 4021 | Flint Interests, LLC | Houston, TX 77057 | Oil & Gas Operator | Feb 2026 |
| 4022 | Flint Oak Energy, LLC | Montgomery, TX 77356 | Oil & Gas Operator | Feb 2026 |
| 4023 | Flint Oil & Gas | San Angelo, TX 76904 | Oil & Gas Operator | Aug 2003 |
| 4024 | Flint Pipeline Company | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 4025 | Flint Plugging | San Angelo, TX 76904 | Oil & Gas Operator | Mar 2008 |
| 4026 | Flint Rock Resources MGMNT, Inc. | Austin, TX 78734 | Oil & Gas Operator | Feb 2026 |
| 4027 | Flint, Billy Individual | Merkel, TX 79536 | Oil & Gas Operator | Feb 2026 |
| 4028 | Flintlock Exploration, LLC | Frisco, TX 75035 | Oil & Gas Operator | Feb 2026 |
| 4029 | Flo A & P Inc. | Seminole, TX 79360 | Oil & Gas Operator | Feb 2024 |
| 4030 | Flo Petro, LLC. | Tyler, TX 75713 | Oil Operator | Feb 2026 |
| 4031 | Floex Energy LLC | Tyler, TX 75701 | Oil Operator | Feb 2026 |
| 4032 | Flournoy Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 4033 | Flournoy Production Co. | Alice, TX 78333 | Oil & Gas Operator | Dec 2002 |
| 4034 | Flournoy, Russell B. | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2020 |
| 4035 | Flow Energy Inc. | Bellaire, TX 77401 | Oil & Gas Operator | Sep 1996 |
| 4036 | Flow Production Company | Midland, TX 79708 | Oil & Gas Operator | Mar 2005 |
| 4037 | Floyd Oil Company | Houston, TX 77002 | Oil & Gas Operator | Nov 1999 |
| 4038 | Floyd Operating Company | Houston, TX 77002 | Oil & Gas Operator | Jul 2004 |
| 4039 | Floyd, Timber Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 4040 | Flusche Brothers | Muenster, TX 76252 | Oil & Gas Operator | Feb 2026 |
| 4041 | Flusche Properties, L.L.C. | Electra, TX 76360 | Oil & Gas Operator | Jan 2017 |
| 4042 | Flusche Supply, Inc. | Electra, TX 76360 | Oil & Gas Operator | Aug 1994 |
| 4043 | Flusche, Herb | Wichita Falls, TX 76309 | Oil & Gas Operator | Mar 2005 |
| 4044 | Flux Energy LLC | Spring, TX 77379 | Oil & Gas Operator | Feb 2026 |
| 4045 | Flying W Resources, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 4046 | Flynn, Ben A. Trustee | Coleman, TX 76834 | Oil & Gas Operator | Jul 2001 |
| 4047 | FM Production | Kilgore, TX 75662 | Oil Operator | Feb 2026 |
| 4048 | FMD Oil Co. | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2020 |
| 4049 | Foag, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2022 |
| 4050 | Focus Energy, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2019 |
| 4051 | Follett Operating Co. | Darrouzett, TX 79024 | Oil & Gas Operator | Jun 2019 |
| 4052 | Foothill Energy, LLC | Spring, TX 77393 | Oil & Gas Operator | Feb 2026 |
| 4053 | Foothills Texas, Inc. | Houston, TX 77269 | Oil & Gas Operator | Aug 2019 |
| 4054 | Fora Company | Borger, TX 79007 | Oil & Gas Operator | Feb 2026 |
| 4055 | Forbes Producing, LLC | Corpus Chrsti, TX 78410 | Oil Operator | Sep 2025 |
| 4056 | Forbes, C. C. Company | Alice, TX 78333 | Oil & Gas Operator | Sep 2015 |
| 4057 | Forbes, Charles C. | Hebbronville, TX 78361 | Oil & Gas Operator | Jul 2011 |
| 4058 | Force 4 Energy Resources, Inc. | Austin, TX 78733 | Oil & Gas Operator | Aug 2005 |
| 4059 | Force 5 Energy, LLC | Houston, TX 77090 | Oil & Gas Operator | Dec 2018 |
| 4060 | Forcenergy Gas Exploration Inc. | Miami, FL 33129 | Oil & Gas Operator | Aug 1996 |
| 4061 | Forcenergy Inc | Miami, FL 33129 | Oil & Gas Operator | Mar 2015 |
| 4062 | Forcenergy Onshore Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2012 |
| 4063 | Ford Oil Co | Bangs, TX 76823 | Oil & Gas Operator | Dec 2022 |
| 4064 | Ford, Don H. & Assoc. | San Antonio, TX 78217 | Oil & Gas Operator | Feb 2026 |
| 4065 | Ford, R. J. Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Feb 2026 |
| 4066 | Fordyce Oil & Gas | Sullivan City, TX 78595 | Oil & Gas Operator | Jul 2022 |
| 4067 | Fordyce Oil & Gas, LLC | Sullivan City, TX 78595 | Gas Operator | Feb 2026 |
| 4068 | Fore Oil, LLC | Manvel, TX 77578 | Oil Operator | May 2021 |
| 4069 | Foree Oil Company | Terrell, TX 75160 | Oil & Gas Operator | Feb 2026 |
| 4070 | Foree, R. L. Trust "A" | Dallas, TX 75225 | Oil & Gas Operator | Dec 1999 |
| 4071 | Foreland Operating, LLC | Royse City, TX 75189 | Oil & Gas Operator | Oct 2021 |
| 4072 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 4073 | Forest Oil Permian Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 4074 | Forestar Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2016 |
| 4075 | Forestar Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2017 |
| 4076 | Forge Energy Operating, LLC | San Antonio, TX 78209 | Oil & Gas Operator | Jun 2023 |
| 4077 | Forge Energy, LLC | San Antonio, TX 78249 | Oil & Gas Operator | Apr 2019 |
| 4078 | Forjack Operating Company | Midland, TX 79702 | Oil & Gas Operator | Sep 1994 |
| 4079 | Formation Recovery LLC | Weatherford, TX 76087 | Oil & Gas Operator | Feb 2026 |
| 4080 | Formation Resources LLC | Fort Worth, TX 76185 | Oil & Gas Operator | Feb 2026 |
| 4081 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | Feb 2026 |
| 4082 | Forney & McCombs | Houston, TX 77056 | Oil & Gas Operator | Jan 1998 |
| 4083 | Forney Oil Corporation | Houston, TX 77056 | Oil & Gas Operator | Jan 1998 |
| 4084 | Forrest Energy, LLC | Hattiesburg, MS 39401 | Oil & Gas Operator | Feb 1998 |
| 4085 | Forrester Oil & Gas Co. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 4086 | Forrester, J. L. | Longview, TX 75606 | Oil & Gas Operator | Feb 2026 |
| 4087 | Forsan Oil Company | Forsan, TX 79733 | Oil & Gas Operator | Jul 2008 |
| 4088 | Forster, Fred Jr. | Midland, TX 79705 | Oil & Gas Operator | Aug 2008 |
| 4089 | Fort Apache Energy, Inc. | Boerne, TX 78015 | Oil & Gas Operator | Feb 2026 |
| 4090 | Fort Worth Natural Gas, Inc. | Dallas, TX 75254 | Oil & Gas Operator | Feb 2026 |
| 4091 | Fort Worth Production Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Oct 1996 |
| 4092 | Fortay Inc. | Sunray, TX 79086 | Oil & Gas Operator | Feb 2026 |
| 4093 | Forte Energy Corporation | Dallas, TX 75205 | Oil & Gas Operator | Dec 2010 |
| 4094 | Fortson Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2020 |
| 4095 | Fortuna Exploration, Inc. | Abilene, TX 79602 | Oil & Gas Operator | Feb 2026 |
| 4096 | Fortuna Resources Dvlpment, LLC | Houston, TX 77055 | Oil & Gas Operator | Feb 2026 |
| 4097 | Fortune Energy, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2026 |
| 4098 | Fortune Natural Resources Corp. | Houston, TX 77067 | Oil & Gas Operator | Dec 2003 |
| 4099 | Fortune Operating Company | Willis, TX 77378 | Oil & Gas Operator | Feb 2026 |
| 4100 | Fortune Operating, Inc. | Bowling Green, KY 42104 | Oil & Gas Operator | Feb 2026 |