| 301 | Elco Oil & Gas | San Angelo, TX 76902 | Oil & Gas Operator | Dec 2014 |
| 302 | Emerald Production Company | Midland, TX 79702 | Oil & Gas Operator | Jun 1995 |
| 303 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 304 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Dec 2025 |
| 305 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Nov 2025 |
| 306 | Enduring Resources, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Dec 2025 |
| 307 | Energen Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2021 |
| 308 | Energy Development Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2024 |
| 309 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | Nov 2025 |
| 310 | Energyquest II, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Nov 2025 |
| 311 | Enerquest Oil & Gas LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Nov 2025 |
| 312 | Enerquest Operating, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Feb 2026 |
| 313 | Enertex, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 1995 |
| 314 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 315 | Enex Resources Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2009 |
| 316 | Engroup Resources, L.P. | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 317 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 318 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 319 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 320 | EP Operating Limited Partnership | Dallas, TX 75201 | Oil & Gas Operator | Feb 1995 |
| 321 | Ernmar Investments, Inc. | Edmond, OK 73083 | Oil & Gas Operator | Feb 2026 |
| 322 | Escondido Resources II, LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2017 |
| 323 | Estoril Producing Corporation | Midland, TX 79701 | Oil & Gas Operator | Apr 1994 |
| 324 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 325 | Etc Field Services LLC | San Antonio, TX 78258 | Oil Operator | Jun 2018 |
| 326 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 327 | Evinger, Ernest E. | Midland, TX 79705 | Oil & Gas Operator | Mar 2002 |
| 328 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Nov 2025 |
| 329 | Exl Petroleum, LP | Midland, TX 79705 | Oil & Gas Operator | Jun 2017 |
| 330 | Exok Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Nov 2025 |
| 331 | Expro Engineering, Inc. | Fort Worth, TX 76179 | Oil & Gas Operator | Feb 2026 |
| 332 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Feb 2026 |
| 333 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Feb 2026 |
| 334 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Feb 2026 |
| 335 | Fagadau Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2006 |
| 336 | Falcon Creek Resources, Inc. | Tulsa, OK 74137 | Oil & Gas Operator | Apr 2001 |
| 337 | Famcor Oil, Inc. | Scottsdale, AZ 85260 | Oil & Gas Operator | Sep 2020 |
| 338 | Fasken Oil And Ranch, LTD. | Midland, TX 79707 | Oil & Gas Operator | Feb 2026 |
| 339 | Fed Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 340 | Fenway Energy Development Co. | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 341 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 342 | Finaly Resources LLC | Sunset Beach, CA 90742 | Oil & Gas Operator | Feb 2026 |
| 343 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Feb 2026 |
| 344 | Fisher Oil Co. | Big Lake, TX 76932 | Oil & Gas Operator | Feb 2026 |
| 345 | Fiveash Operating Company, Inc. | Christoval, TX 76935 | Oil & Gas Operator | Aug 2003 |
| 346 | Flamingo Operating, LLC | Houston, TX 77084 | Oil & Gas Operator | Feb 2026 |
| 347 | Flat Top Operating, LLC | Midland, TX 79707 | Oil & Gas Operator | Feb 2026 |
| 348 | Floyd Oil Company | Houston, TX 77002 | Oil & Gas Operator | Nov 1999 |
| 349 | Forcenergy Gas Exploration Inc. | Miami, FL 33129 | Oil & Gas Operator | Aug 1996 |
| 350 | Forcenergy Inc | Miami, FL 33129 | Oil & Gas Operator | Mar 2015 |
| 351 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 352 | Forest Oil Permian Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 353 | Forge Energy Operating, LLC | San Antonio, TX 78209 | Oil & Gas Operator | Jun 2023 |
| 354 | Forge Energy, LLC | San Antonio, TX 78249 | Oil & Gas Operator | Apr 2019 |
| 355 | Forster, Fred Jr. | Midland, TX 79705 | Oil & Gas Operator | Aug 2008 |
| 356 | Forte Energy Corporation | Dallas, TX 75205 | Oil & Gas Operator | Dec 2010 |
| 357 | Fossil Rock Resources, Inc. | Fort Worth, TX 76185 | Oil & Gas Operator | May 2016 |
| 358 | Founders Oil & Gas Operating,LLC | Arlington, TX 76011 | Oil & Gas Operator | Jul 2023 |
| 359 | Four C Oil & Gas Corp. | Dallas, TX 75206 | Oil & Gas Operator | Jan 2024 |
| 360 | Fourway Oil Company | Longview, TX 75606 | Oil & Gas Operator | Feb 2026 |
| 361 | Free Rein Operating LLC | Brenham, TX 77834 | Oil & Gas Operator | Feb 2026 |
| 362 | Freedom Energy Inc | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Feb 2026 |
| 363 | Freedom Energy, Inc. (I) | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Jun 2003 |
| 364 | Freedom Energy, LTD. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Jun 2011 |
| 365 | Freeman Energy Inc. (I) | Fredericksbrg, TX 78624 | Oil & Gas Operator | Aug 1996 |
| 366 | Freeman, Kathleen Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 1996 |
| 367 | Freeport Oil Company | New Orleans, LA 70112 | Oil & Gas Operator | Oct 1979 |
| 368 | Frisco Energy, L.L.C. | Tulsa, OK 74105 | Oil & Gas Operator | Nov 2025 |
| 369 | Fuel Products, Inc. | Midland, TX 79702 | Oil Operator | Mar 2002 |
| 370 | Fuller Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 1995 |
| 371 | Fuller Petroleum Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 372 | Fuller Production, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 373 | Furry Operating Account | Brownwood, TX 76804 | Oil & Gas Operator | Aug 2003 |
| 374 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 375 | G P II Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Sep 2020 |
| 376 | Gaea Services, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Sep 2021 |
| 377 | Galilee Oil Investments LLC | San Antonio, TX 78205 | Oil & Gas Operator | Feb 2026 |
| 378 | Gap Exploration, LTD. | Naples, FL 34110 | Oil & Gas Operator | Jul 2008 |
| 379 | Garrd Oil Company LLC | FT Stockton, TX 79735 | Oil & Gas Operator | Feb 2026 |
| 380 | Gary Permian, LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2022 |
| 381 | General Crude Oil Co | Houston, TX 77005 | Oil & Gas Operator | Dec 1979 |
| 382 | Genesis Exploration LLC | FT Stockton, TX 79735 | Oil & Gas Operator | Feb 2026 |
| 383 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 384 | Geonatural Resources, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 385 | Gifford Operating Company | Dallas, TX 75206 | Oil & Gas Operator | Jul 2003 |
| 386 | Gilmore Oil & Gas | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 387 | Glossop Oil & Gas, LLC | Midland, TX 79704 | Oil & Gas Operator | Jul 2025 |
| 388 | Glossop, Robert L. | Midland, TX 79704 | Oil & Gas Operator | Sep 2007 |
| 389 | Glossop, Robert L. Estate | Midland, TX 79704 | Oil & Gas Operator | Feb 2018 |
| 390 | Goldston Oil Corporation | Houston, TX 77257 | Oil & Gas Operator | Feb 2026 |
| 391 | Goodnight Midstream Permian, LLC | Dallas, TX 75206 | Oil & Gas Operator | Feb 2026 |
| 392 | Gordy Oil Company | Houston, TX 77007 | Oil & Gas Operator | Feb 2026 |
| 393 | Grace Petroleum Operating, LLC | Llano, TX 78643 | Oil & Gas Operator | Feb 2026 |
| 394 | Graham, Bill J. Oil & Gas Corp. | Midland, TX 79710 | Oil & Gas Operator | Nov 2000 |
| 395 | Graham, H.E. | Imperial, TX 79743 | Oil & Gas Operator | Mar 2007 |
| 396 | Grand Banks Energy Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2025 |
| 397 | Grand Operating, Inc. | Addison, TX 75001 | Oil & Gas Operator | Nov 2025 |
| 398 | Gray, Robert Leon | FT Stockton, TX 79735 | Oil & Gas Operator | Feb 2000 |
| 399 | GRB Properties, Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 2003 |
| 400 | Greasewood Oil Company | Midland, TX 79705 | Oil & Gas Operator | Jul 2007 |