| 201 | DWR Oil Company | Merkel, TX 79536 | Oil & Gas Operator | May 2025 |
| 202 | Dym Energy, Inc. | Celina, TX 75009 | Oil & Gas Operator | Apr 2018 |
| 203 | Earthbound Resources LLC | Merkel, TX 79536 | Oil & Gas Operator | May 2025 |
| 204 | Eastco Gas Co. | Midland, TX 79707 | Oil & Gas Operator | Oct 1999 |
| 205 | Echo Production Inc | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 206 | Edge Oil And Gas, LLC | Abilene, TX 79602 | Oil Operator | May 2025 |
| 207 | Edinburgh Energy Partners, LLC | Midland, TX 79707 | Oil & Gas Operator | May 2025 |
| 208 | Edington Oil Company | Albany, TX 76430 | Oil & Gas Operator | Aug 2006 |
| 209 | Edmar Company, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 210 | Edmondson Oil & Gas | Ballinger, TX 76821 | Oil & Gas Operator | May 2025 |
| 211 | Edwards, Gus Co. | Abilene, TX 79603 | Oil & Gas Operator | Jun 2004 |
| 212 | El Reno Energy, LLC | Granbury, TX 76048 | Oil & Gas Operator | May 2025 |
| 213 | Elk Energy Corporation | Denver, CO 80218 | Oil & Gas Operator | Mar 2008 |
| 214 | Encino Exploration, Inc. | George West, TX 78022 | Oil & Gas Operator | May 2025 |
| 215 | Encon Services, Inc. | Abilene, TX 79608 | Oil & Gas Operator | May 2025 |
| 216 | Encore Energy, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |
| 217 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 218 | Energex Inc. | Abilene, TX 79604 | Oil & Gas Operator | May 2025 |
| 219 | Energy Resource & Develop., Corp | Rockwall, TX 75087 | Oil & Gas Operator | Jun 1998 |
| 220 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | Jan 2025 |
| 221 | Enexco, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Mar 2017 |
| 222 | Enrich Oil Corporation | Abilene, TX 79604 | Oil & Gas Operator | May 2025 |
| 223 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 224 | Eor Operating Company | Houston, TX 77079 | Oil & Gas Operator | May 2025 |
| 225 | Erson Royalty Company, Inc. | Merkel, TX 79536 | Oil & Gas Operator | Feb 2006 |
| 226 | Estacado Energy, LLC | Iowa Park, TX 76367 | Oil & Gas Operator | May 2025 |
| 227 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 228 | Etc Field Services LLC | San Antonio, TX 78258 | Oil Operator | Jun 2018 |
| 229 | Ex-Cel Resources, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | May 2025 |
| 230 | Exlco, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 231 | Exmoor Oil & Minerals Corp. | Dallas, TX 75225 | Oil & Gas Operator | May 1994 |
| 232 | Exp, Inc. | Dallas, TX 75244 | Oil & Gas Operator | May 2003 |
| 233 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 234 | Fagadau Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2006 |
| 235 | Feagan Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 236 | Federal Oil, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | May 2025 |
| 237 | FGB Energy, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2017 |
| 238 | Fidelity Petroleum Corporation | Plano, TX 75074 | Oil & Gas Operator | May 2025 |
| 239 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 240 | Fiscus Drilling Co., Inc. | Clyde, TX 79510 | Oil & Gas Operator | Apr 2015 |
| 241 | Fisher, Jack Inc. | Abilene, TX 79603 | Oil & Gas Operator | Sep 2001 |
| 242 | Flare Oil Inc | Rockport, TX 78382 | Oil & Gas Operator | May 2025 |
| 243 | Fletcher Operating, LLC | Fairhope, AL 36532 | Oil & Gas Operator | May 2025 |
| 244 | Fletcher Petroleum Corp. | Fairhope, AL 36533 | Oil & Gas Operator | Feb 2025 |
| 245 | Flint, Billy Individual | Merkel, TX 79536 | Oil & Gas Operator | May 2025 |
| 246 | Fordyce Oil & Gas | Sullivan City, TX 78595 | Oil & Gas Operator | Jul 2022 |
| 247 | Foree Oil Company | Terrell, TX 75160 | Oil & Gas Operator | May 2025 |
| 248 | Formation Recovery LLC | Weatherford, TX 76087 | Oil & Gas Operator | May 2025 |
| 249 | Fortson Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2020 |
| 250 | Fortuna Exploration, Inc. | Abilene, TX 79602 | Oil & Gas Operator | May 2025 |
| 251 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | May 2025 |
| 252 | Frazier, VIolet H. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2014 |
| 253 | Freeman Oil Co | Midland, TX 79701 | Oil & Gas Operator | Sep 2014 |
| 254 | Freeman, Michael | Abilene, TX 79601 | Oil & Gas Operator | May 2025 |
| 255 | Frontier Operating Corporation | Albany, TX 76430 | Oil & Gas Operator | May 2025 |
| 256 | FTC Consulting, LLC | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 257 | G & F Oil, Inc. | Aledo, TX 76008 | Oil & Gas Operator | May 2025 |
| 258 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 259 | G. S. Properties, Inc. | Arlington, TX 76013 | Oil & Gas Operator | May 1999 |
| 260 | GBF Operating LLC | Morrison, CO 80465 | Oil & Gas Operator | May 2025 |
| 261 | GBG Operating Corp. | Wichita Falls, TX 76302 | Oil & Gas Operator | Sep 1998 |
| 262 | Gem Oil Company | Albany, TX 76430 | Oil & Gas Operator | Sep 2002 |
| 263 | Genie Corporation | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 264 | Geonatural Resources, Inc. | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 265 | Geostrat Inc. | Addison, TX 75001 | Oil & Gas Operator | Nov 2011 |
| 266 | Geosurveys, Inc. | Abilene, TX 79608 | Oil & Gas Operator | May 2025 |
| 267 | Geotrac Energy Corporation | Abilene, TX 79604 | Oil & Gas Operator | Jul 2000 |
| 268 | Giant Energy Corp. | Dallas, TX 75230 | Oil & Gas Operator | Jul 2019 |
| 269 | Giant NRG Co., LP | Dallas, TX 75230 | Oil & Gas Operator | May 2025 |
| 270 | Gillespie Operating LLC | Abilene, TX 79608 | Oil & Gas Operator | May 2025 |
| 271 | Ginnings Company | Wichita Falls, TX 76301 | Oil & Gas Operator | May 2025 |
| 272 | Glahn Resources, Inc. | Arlington, TX 76003 | Oil & Gas Operator | May 2025 |
| 273 | Global Drilling, LLC | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 274 | Go-Energy Co. | San Antonio, TX 78232 | Oil & Gas Operator | Mar 2002 |
| 275 | Golden Horse Group Corp. | Shreveport, LA 71115 | Oil Operator | May 2025 |
| 276 | Gonzenbach, Glen D | Henrietta, TX 76365 | Oil & Gas Operator | Aug 2007 |
| 277 | Gore Oil Company | Wichita, KS 67202 | Oil & Gas Operator | Jan 2025 |
| 278 | Gore, G.E. | Plano, TX 75074 | Oil & Gas Operator | Aug 2003 |
| 279 | Gosa Oil Company | Albany, TX 76430 | Oil & Gas Operator | May 2025 |
| 280 | Grand Energy, Inc. | Dallas, TX 75248 | Oil & Gas Operator | Oct 2002 |
| 281 | Gray Oil & Gas Inc. | Abilene, TX 79606 | Oil & Gas Operator | Oct 2013 |
| 282 | Grayrock Energy II, LLC | Fort Worth, TX 76101 | Oil & Gas Operator | May 2025 |
| 283 | Greasewood Oil Company | Midland, TX 79705 | Oil & Gas Operator | Jul 2007 |
| 284 | Great Texas Crude Inc. | Fredericksbrg, TX 78624 | Oil & Gas Operator | May 2025 |
| 285 | Greco Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 286 | GRS Oil & Gas Company | Irving, TX 75017 | Oil & Gas Operator | Aug 1994 |
| 287 | GT Productions | Euless, TX 76040 | Oil & Gas Operator | Jan 1997 |
| 288 | Guffey, Roy, Oil Company | Dallas, TX 75206 | Oil & Gas Operator | Aug 2011 |
| 289 | Guidance Oil Developers | Boerne, TX 78006 | Oil & Gas Operator | May 2025 |
| 290 | Guidance Oil Developers, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Mar 2008 |
| 291 | Guinn Investments, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2018 |
| 292 | H & S Drilling Co Inc | Frazeysburg, OH 43822-0040-0040 | Oil & Gas Operator | Dec 2016 |
| 293 | H.A.N. Operating Incorporated | Clyde, TX 79510 | Oil & Gas Operator | Aug 2016 |
| 294 | Hadaway Consult And Engineer,LLC | Canadian, TX 79014 | Oil & Gas Operator | May 2025 |
| 295 | Hair, Roger D. | Post, TX 79356 | Oil & Gas Operator | May 2025 |
| 296 | Hale Oil & Gas Properties | Graham, TX 76450 | Oil & Gas Operator | Jul 1997 |
| 297 | Halliburton Operating Company | Plano, TX 75093 | Oil & Gas Operator | May 2025 |
| 298 | Hanson Corporation | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2008 |
| 299 | Harding Company | Dallas, TX 75244 | Oil & Gas Operator | Jan 2015 |
| 300 | Hardway Prod & Operating, LLC | Abilene, TX 79608 | Oil & Gas Operator | Aug 2016 |