| 201 | Focus Energy, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2019 |
| 202 | Follett Operating Co. | Darrouzett, TX 79024 | Oil & Gas Operator | Jun 2019 |
| 203 | Foothill Energy, LLC | Spring, TX 77393 | Oil & Gas Operator | Mar 2025 |
| 204 | Foothills Texas, Inc. | Houston, TX 77269 | Oil & Gas Operator | Aug 2019 |
| 205 | Fora Company | Borger, TX 79007 | Oil & Gas Operator | Mar 2025 |
| 206 | Forbes Producing, LLC | Corpus Chrsti, TX 78410 | Oil Operator | Mar 2025 |
| 207 | Forbes, C. C. Company | Alice, TX 78333 | Oil & Gas Operator | Sep 2015 |
| 208 | Forbes, Charles C. | Hebbronville, TX 78361 | Oil & Gas Operator | Jul 2011 |
| 209 | Force 4 Energy Resources, Inc. | Austin, TX 78733 | Oil & Gas Operator | Aug 2005 |
| 210 | Force 5 Energy, LLC | Houston, TX 77090 | Oil & Gas Operator | Dec 2018 |
| 211 | Forcenergy Gas Exploration Inc. | Miami, FL 33129 | Oil & Gas Operator | Aug 1996 |
| 212 | Forcenergy Inc | Miami, FL 33129 | Oil & Gas Operator | Mar 2015 |
| 213 | Forcenergy Onshore Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2012 |
| 214 | Ford Oil Co | Bangs, TX 76823 | Oil & Gas Operator | Dec 2022 |
| 215 | Ford, Don H. & Assoc. | San Antonio, TX 78217 | Oil & Gas Operator | Mar 2025 |
| 216 | Ford, R. J. Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2025 |
| 217 | Fordyce Oil & Gas | Sullivan City, TX 78595 | Oil & Gas Operator | Jul 2022 |
| 218 | Fore Oil, LLC | Manvel, TX 77578 | Oil Operator | May 2021 |
| 219 | Foree Oil Company | Terrell, TX 75160 | Oil & Gas Operator | Mar 2025 |
| 220 | Foree, R. L. Trust "A" | Dallas, TX 75225 | Oil & Gas Operator | Dec 1999 |
| 221 | Foreland Operating, LLC | Royse City, TX 75189 | Oil & Gas Operator | Oct 2021 |
| 222 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 223 | Forest Oil Permian Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 224 | Forestar Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2016 |
| 225 | Forestar Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2017 |
| 226 | Forge Energy Operating, LLC | San Antonio, TX 78249 | Oil & Gas Operator | Jun 2023 |
| 227 | Forge Energy, LLC | San Antonio, TX 78249 | Oil & Gas Operator | Apr 2019 |
| 228 | Formation Recovery LLC | Weatherford, TX 76087 | Oil & Gas Operator | Mar 2025 |
| 229 | Formation Resources LLC | Fort Worth, TX 76185 | Oil & Gas Operator | Mar 2025 |
| 230 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | Mar 2025 |
| 231 | Forney & McCombs | Houston, TX 77056 | Oil & Gas Operator | Jan 1998 |
| 232 | Forney Oil Corporation | Houston, TX 77056 | Oil & Gas Operator | Jan 1998 |
| 233 | Forrest Energy, LLC | Hattiesburg, MS 39401 | Oil & Gas Operator | Feb 1998 |
| 234 | Forrester Oil & Gas Co. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2025 |
| 235 | Forrester, J. L. | Longview, TX 75606 | Oil & Gas Operator | Mar 2025 |
| 236 | Forsan Oil Company | Forsan, TX 79733 | Oil & Gas Operator | Jul 2008 |
| 237 | Forster, Fred Jr. | Midland, TX 79705 | Oil & Gas Operator | Aug 2008 |
| 238 | Fort Apache Energy, Inc. | Boerne, TX 78015 | Oil & Gas Operator | Mar 2025 |
| 239 | Fort Worth Natural Gas, Inc. | Dallas, TX 75254 | Oil & Gas Operator | Mar 2025 |
| 240 | Fort Worth Production Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Oct 1996 |
| 241 | Fortay Inc. | Sunray, TX 79086 | Oil & Gas Operator | Mar 2025 |
| 242 | Forte Energy Corporation | Dallas, TX 75205 | Oil & Gas Operator | Dec 2010 |
| 243 | Fortson Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2020 |
| 244 | Fortuna Exploration, Inc. | Abilene, TX 79602 | Oil & Gas Operator | Mar 2025 |
| 245 | Fortuna Resources Dvlpment, LLC | Houston, TX 77055 | Oil & Gas Operator | Mar 2025 |
| 246 | Fortune Energy, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Mar 2025 |
| 247 | Fortune Natural Resources Corp. | Houston, TX 77067 | Oil & Gas Operator | Dec 2003 |
| 248 | Fortune Operating Company | Willis, TX 77378 | Oil & Gas Operator | Mar 2025 |
| 249 | Fortune Operating, Inc. | Bowling Green, KY 42104 | Oil & Gas Operator | Mar 2025 |
| 250 | Fortune Production Co. | San Angelo, TX 76906 | Oil & Gas Operator | Dec 2008 |
| 251 | Fortune Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Mar 2025 |
| 252 | Forum Exploration Co., L.P. | Tyler, TX 75710 | Oil & Gas Operator | Apr 2010 |
| 253 | Forza Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Mar 2025 |
| 254 | Fossil Creek Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2025 |
| 255 | Fossil Energy Inc | Austin, TX 78746 | Oil & Gas Operator | Mar 2025 |
| 256 | Fossil Fuels Inc. | Dallas, TX 75201 | Oil & Gas Operator | May 2000 |
| 257 | Fossil Operating, Inc. | Dallas, TX 75238 | Oil & Gas Operator | Mar 2025 |
| 258 | Fossil Petroleum LLC | San Angelo, TX 76906 | Oil & Gas Operator | Mar 2025 |
| 259 | Fossil Resources, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Oct 2017 |
| 260 | Fossil Rock Resources, Inc. | Fort Worth, TX 76185 | Oil & Gas Operator | May 2016 |
| 261 | Foster Energy Company | Tilden, TX 78072 | Oil & Gas Operator | Sep 2024 |
| 262 | Foster Well Service, Inc. | Conroe, TX 77305 | Oil & Gas Operator | Jan 2000 |
| 263 | Foster, Charles R. Co. | Haskell, TX 79521 | Oil & Gas Operator | Aug 2002 |
| 264 | Foster, Randy | New Braunfels, TX 78132 | Oil & Gas Operator | Feb 2021 |
| 265 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Mar 2025 |
| 266 | Foundation Oil Company, Inc. | Kingwood, TX 77325 | Oil & Gas Operator | Mar 2025 |
| 267 | Founders Oil & Gas Operating,LLC | Arlington, TX 76011 | Oil & Gas Operator | Jul 2023 |
| 268 | Four - S Oil Company, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2008 |
| 269 | Four Aces Company | Borger, TX 79008 | Oil & Gas Operator | Mar 1995 |
| 270 | Four C Oil & Gas Corp. | Dallas, TX 75206 | Oil & Gas Operator | Jan 2024 |
| 271 | Four Corners Energy, LLC | Gulf Breeze, FL 32563 | Oil & Gas Operator | Mar 2025 |
| 272 | Four Corners Petroleum II, LLC | Denver, CO 80215 | Oil & Gas Operator | Feb 2023 |
| 273 | Four Diamond Operating, LLC | Kilgore, TX 75663 | Oil Operator | Mar 2025 |
| 274 | Four Forty One Oil Co. | Natalia, TX 78059 | Oil & Gas Operator | Mar 2025 |
| 275 | Four H Oil Properties | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 276 | Four K Production | Pampa, TX 79065 | Oil & Gas Operator | Mar 2025 |
| 277 | Four Kin Oil Co | Muenster, TX 76252 | Oil & Gas Operator | Dec 2001 |
| 278 | Four Seas Exploration LLC | Oklahoma City, OK 73101-1557 | Oil & Gas Operator | Dec 2019 |
| 279 | Four Sevens Oil Co., LTD. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2001 |
| 280 | Four Sevens Operating Co., LTD. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 281 | Four Square Production, L.L.C. | Houston, TX 77079 | Oil & Gas Operator | Aug 2004 |
| 282 | Four Star Oil & Gas Company | Houston, TX 77252 | Oil & Gas Operator | Nov 2024 |
| 283 | Four Starr Energy, Inc. | Dallas, TX 75243 | Gas Operator | May 2016 |
| 284 | Four Starr Production, LLC | Dallas, TX 75243 | Oil & Gas Operator | Mar 2025 |
| 285 | Four-C Management & Industries | Rockdale, TX 76567 | Oil & Gas Operator | Aug 2008 |
| 286 | Four-S Oil Co., LTD. | Kilgore, TX 75663 | Oil Operator | Apr 2007 |
| 287 | Fourcooks Oil & Gas, LLC | Waco, TX 76710 | Oil Operator | Mar 2025 |
| 288 | Fourpoint Energy, LLC | Denver, CO 80206 | Oil & Gas Operator | Mar 2025 |
| 289 | Fourstar Resources LLC | Westlake, TX 76262 | Oil Operator | Dec 2024 |
| 290 | Fourth Floor Operating LLC | Austin, TX 78746 | Oil & Gas Operator | Mar 2025 |
| 291 | Fourway Oil Company | Longview, TX 75606 | Oil & Gas Operator | Mar 2025 |
| 292 | Fowler Oil & Gas LLC | Fort Worth, TX 76109 | Oil & Gas Operator | Mar 2025 |
| 293 | Fox Oil And Gas Inc | Houston, TX 77002 | Gas Operator | Dec 2002 |
| 294 | Fox Oil, Inc. | Iowa Park, TX 76367 | Oil & Gas Operator | Feb 1999 |
| 295 | Fox Operating Company | Dallas, TX 75240 | Oil & Gas Operator | Jan 2025 |
| 296 | Fox, Hewitt B., Inc. | Corpus Chrsti, TX 78411 | Oil & Gas Operator | Mar 2025 |
| 297 | Foxborough Energy Company, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Mar 2025 |
| 298 | Foxfire Productions, Inc. | Corsicana, TX 75110 | Oil Operator | Jul 2014 |
| 299 | FP Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2008 |
| 300 | Fraco Services, Inc. | Burkburnett, TX 76354 | Oil Operator | Mar 2025 |