| 101 | Field Production Company | Cleburne, TX 76033 | Oil & Gas Operator | Mar 2023 |
| 102 | Fields Exploration, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Aug 2015 |
| 103 | Fields Oil & Gas Company, LLC | Dallas, TX 75230 | Oil & Gas Operator | Dec 2025 |
| 104 | Fields, Bert, Jr. | Dallas, TX 75230 | Oil & Gas Operator | Apr 2015 |
| 105 | Fieldwood Energy LLC | Houston, TX 77042 | Oil & Gas Operator | Dec 2024 |
| 106 | Fieldwood Energy Offshore LLC | Houston, TX 77042 | Oil & Gas Operator | Dec 2025 |
| 107 | Fieldwood Onshore LLC | Houston, TX 77098 | Oil & Gas Operator | Dec 2025 |
| 108 | Fiesta Energy LLC | Corpus Chrsti, TX 78404 | Oil & Gas Operator | Dec 2025 |
| 109 | Figgie Natural Resources | Wickliffe, OH 44092 | Oil & Gas Operator | Oct 1995 |
| 110 | Figure 3 Operating LLC | Tyler, TX 75703 | Oil Operator | Dec 2024 |
| 111 | Fiml Natural Resources, LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2014 |
| 112 | Fin Energy, LLC | Wichita Falls, TX 76308 | Oil Operator | Dec 2025 |
| 113 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 114 | Finaly Resources LLC | Sunset Beach, CA 90742 | Oil & Gas Operator | Dec 2025 |
| 115 | Finch-Crestmont | Houston, TX 77027 | Oil & Gas Operator | Oct 2012 |
| 116 | Finger Oil & Gas, Inc. | Castroville, TX 78009 | Oil & Gas Operator | May 2021 |
| 117 | Finkelstein, Jack, Trustee | Houston, TX 77027 | Oil & Gas Operator | Apr 2007 |
| 118 | Finlay Energy, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Jul 1999 |
| 119 | Finley Oil Company, LLC | Liberty, TX 77575 | Oil Operator | Dec 2025 |
| 120 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Dec 2025 |
| 121 | Finnell Oil Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2009 |
| 122 | Finnell Oil Services, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 123 | Firebird Energy II LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2025 |
| 124 | Firebird Energy LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2022 |
| 125 | Firerock Company | Abilene, TX 79602 | Oil & Gas Operator | Dec 2025 |
| 126 | Fireside Oil And Gas, Inc. | West Monroe, LA 71294 | Oil & Gas Operator | Feb 2002 |
| 127 | Firewheel Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Nov 2017 |
| 128 | First American Operating Co. | Breckenridge, TX 76424 | Oil & Gas Operator | Aug 2006 |
| 129 | First Aransas Reserves, Inc. | Alvin, TX 77511 | Oil & Gas Operator | Mar 2018 |
| 130 | First Hardin Corp. | Fulshear, TX 77441 | Oil & Gas Operator | Nov 1994 |
| 131 | First Light Operating, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2025 |
| 132 | First Permian, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 133 | First Reserve Oil & Gas Co | Houston, TX 77002 | Oil & Gas Operator | Apr 2000 |
| 134 | First Rock, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Dec 2025 |
| 135 | First Solid Energy Group, LP | Missouri City, TX 77489 | Oil & Gas Operator | Dec 2025 |
| 136 | First Source Gas, LP | Houston, TX 77010 | Gas Operator | Jan 2006 |
| 137 | First Source Texas, Inc. | MT Pleasant, MI 48858 | Gas Operator | Nov 2004 |
| 138 | First Texas Exploration Corp. | Arcadia, LA 71001 | Oil & Gas Operator | Aug 2003 |
| 139 | Firstrike Energy Corporation | Cleburne, TX 76033 | Oil & Gas Operator | Jan 2025 |
| 140 | Fischer Operating Corporation | Victoria, TX 77902 | Oil & Gas Operator | Jan 1999 |
| 141 | Fiscus Drilling Co., Inc. | Clyde, TX 79510 | Oil & Gas Operator | Apr 2015 |
| 142 | Fishcreek Minerals, LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 143 | Fisher Oil Co. | Big Lake, TX 76932 | Oil & Gas Operator | Dec 2025 |
| 144 | Fisher, Jack Inc. | Abilene, TX 79603 | Oil & Gas Operator | Sep 2001 |
| 145 | Fisher, L. C. Jr. | Longview, TX 75608 | Oil & Gas Operator | May 1993 |
| 146 | Fite Oil & Gas, Inc. | Shreveport, LA 71163 | Oil & Gas Operator | Dec 2025 |
| 147 | Fitts, B.K. Oil & Gas | Bowie, TX 76230 | Oil & Gas Operator | Dec 2025 |
| 148 | Fitzgerald Production Co. | Oil City, LA 71061 | Oil & Gas Operator | Dec 2024 |
| 149 | Five D Co | Cactus, TX 79013 | Oil & Gas Operator | Sep 1996 |
| 150 | Five K Partnership | Graham, TX 76450 | Oil & Gas Operator | Oct 2023 |
| 151 | Five Star Energy, Inc. | Seguin, TX 78155 | Oil & Gas Operator | Jul 2025 |
| 152 | Five States Energy Company | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 153 | Five States Operating Company | Dallas, TX 75206 | Oil & Gas Operator | Feb 2008 |
| 154 | Five States Operating Company LLC | Dallas, TX 75206 | Oil & Gas Operator | Oct 2025 |
| 155 | Five-Jab, Inc. | Tomball, TX 77377 | Oil & Gas Operator | Dec 2025 |
| 156 | Fiveash Operating Company, Inc. | Christoval, TX 76935 | Oil & Gas Operator | Aug 2003 |
| 157 | Fivestones Energy LLC | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 158 | FJH Oil Company | Muenster, TX 76252 | Oil & Gas Operator | Dec 2025 |
| 159 | Fjo Energy, LLC | Fairhope, AL 36532 | Oil Operator | Dec 2025 |
| 160 | Flag Energy, LLC | Centerton, AR 72719 | Oil & Gas Operator | Nov 2018 |
| 161 | Flairtex Resources, Inc. | Houston, TX 77040 | Oil & Gas Operator | Oct 1998 |
| 162 | Flamingo Oil & Gas | Luling, TX 78648 | Oil & Gas Operator | Dec 2025 |
| 163 | Flamingo Operating, LLC | Houston, TX 77084 | Oil & Gas Operator | Dec 2025 |
| 164 | Flare Oil Inc | Rockport, TX 78382 | Oil & Gas Operator | Dec 2025 |
| 165 | Flare Resources Inc. | Houston, TX 77002 | Gas Operator | Jun 2006 |
| 166 | Flash Gas & Oil Southwest, Inc. | Mandeville, LA 70470 | Oil & Gas Operator | Oct 2019 |
| 167 | Flat Creek Operating Co. | Rockwall, TX 75087 | Oil & Gas Operator | Jun 2004 |
| 168 | Flat Creek Resources, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2025 |
| 169 | Flat Top Operating, LLC | Midland, TX 79707 | Oil & Gas Operator | Dec 2025 |
| 170 | Flatonia Energy, LLC | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |
| 171 | Flavian Oil Company | Dallas, TX 75206 | Gas Operator | Jan 1997 |
| 172 | Fletcher Operating, LLC | Fairhope, AL 36532 | Oil & Gas Operator | Dec 2025 |
| 173 | Fletcher Petroleum Corp. | Fairhope, AL 36533 | Oil & Gas Operator | Sep 2025 |
| 174 | Fletcher, M. D. | Pampa, TX 79065 | Oil & Gas Operator | Dec 2007 |
| 175 | Flint Interests, LLC | Houston, TX 77057 | Oil & Gas Operator | Dec 2025 |
| 176 | Flint Oak Energy, LLC | Montgomery, TX 77356 | Oil & Gas Operator | Dec 2025 |
| 177 | Flint Oil & Gas | San Angelo, TX 76904 | Oil & Gas Operator | Aug 2003 |
| 178 | Flint Pipeline Company | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 179 | Flint Rock Resources MGMNT, Inc. | Austin, TX 78734 | Oil & Gas Operator | Dec 2025 |
| 180 | Flint, Billy Individual | Merkel, TX 79536 | Oil & Gas Operator | Dec 2025 |
| 181 | Flintlock Exploration, LLC | Frisco, TX 75035 | Oil & Gas Operator | Dec 2025 |
| 182 | Flo Petro, LLC. | Austin, TX 78746 | Oil Operator | Dec 2025 |
| 183 | Floex Energy LLC | Tyler, TX 75701 | Oil Operator | Dec 2025 |
| 184 | Flournoy Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 185 | Flournoy Production Co. | Alice, TX 78333 | Oil & Gas Operator | Dec 2002 |
| 186 | Flournoy, Russell B. | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2020 |
| 187 | Flow Energy Inc. | Bellaire, TX 77401 | Oil & Gas Operator | Sep 1996 |
| 188 | Flow Production Company | Midland, TX 79708 | Oil & Gas Operator | Mar 2005 |
| 189 | Floyd Oil Company | Houston, TX 77002 | Oil & Gas Operator | Nov 1999 |
| 190 | Floyd Operating Company | Houston, TX 77002 | Oil & Gas Operator | Jul 2004 |
| 191 | Floyd, Timber Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 192 | Flusche Brothers | Muenster, TX 76252 | Oil & Gas Operator | Dec 2025 |
| 193 | Flusche Properties, L.L.C. | Electra, TX 76360 | Oil & Gas Operator | Jan 2017 |
| 194 | Flusche Supply, Inc. | Electra, TX 76360 | Oil & Gas Operator | Aug 1994 |
| 195 | Flusche, Herb | Wichita Falls, TX 76309 | Oil & Gas Operator | Mar 2005 |
| 196 | Flux Energy LLC | Spring, TX 77379 | Oil & Gas Operator | Dec 2025 |
| 197 | Flying W Resources, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 198 | Flynn, Ben A. Trustee | Coleman, TX 76834 | Oil & Gas Operator | Jul 2001 |
| 199 | FM Production | Kilgore, TX 75662 | Oil Operator | Dec 2025 |
| 200 | FMD Oil Co. | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2020 |