| 11301 | Total E&P USA, Inc. | Houston, TX 77210 | Oil & Gas Operator | May 2025 |
| 11302 | Total Minatome Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 1998 |
| 11303 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 11304 | Touchstone Resources USA, Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2006 |
| 11305 | Tower Resources Inc | Conroe, TX 77304 | Oil & Gas Operator | Oct 2025 |
| 11306 | Townes, Don | Clarksville, TX 75426 | Oil & Gas Operator | Oct 2025 |
| 11307 | Townsend Company | Abilene, TX 79608 | Oil & Gas Operator | Dec 2021 |
| 11308 | Townsend, R. F. Trustee | Dallas, TX 75201 | Oil & Gas Operator | Dec 1994 |
| 11309 | TPC Exploration, LLC | May, TX 76857 | Oil & Gas Operator | Oct 2025 |
| 11310 | Tpet Management Inc. | Dallas, TX 75204 | Oil & Gas Operator | Dec 1997 |
| 11311 | Tpet, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Mar 2008 |
| 11312 | TR Offshore, LLC | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Oct 2025 |
| 11313 | TR Operating LLC | Graham, TX 76450 | Oil Operator | Aug 2025 |
| 11314 | Trace Energy Management Inc | Weatherford, TX 76086 | Oil & Gas Operator | Oct 2025 |
| 11315 | Trace Operating, LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Oct 2025 |
| 11316 | Tracer Energy, Inc. | Graham, TX 76450 | Oil & Gas Operator | Nov 1998 |
| 11317 | Tracer Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 11318 | Tracker Mineral | Clyde, TX 79510 | Oil & Gas Operator | Oct 2025 |
| 11319 | Tracker Oil & Gas, Inc. | Bastrop, TX 78602 | Oil & Gas Operator | Oct 2025 |
| 11320 | Tracker Resource Dev III, LLC | Englewood, CO 80112 | Oil & Gas Operator | Jul 2021 |
| 11321 | Trackstar Energies LLC | Colorado Springs, CO 80919-3233 | Oil Operator | Mar 2023 |
| 11322 | Tracy Co. | Rockdale, TX 76567 | Oil & Gas Operator | Mar 2022 |
| 11323 | Tracy Operating Co., LLC | Rockdale, TX 76567 | Oil & Gas Operator | Oct 2025 |
| 11324 | Tracy Production | Lindale, TX 75771 | Oil & Gas Operator | Oct 2025 |
| 11325 | Tradestar Energy, Inc. | Hot Springs, AR 71913 | Oil Operator | Feb 2021 |
| 11326 | Tradition Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2014 |
| 11327 | Tradition Resources Oper, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2017 |
| 11328 | Trail Mountain, Inc. | Artesia, NM 88210 | Oil & Gas Operator | Jan 2016 |
| 11329 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Jul 2025 |
| 11330 | Trail Ridge Energy PRTNS II LLC | Grapevine, TX 76051 | Oil & Gas Operator | Jun 2017 |
| 11331 | Trailblazer Energy LLC | Plano, TX 75075 | Oil & Gas Operator | Jun 2025 |
| 11332 | Trailblazer Energy Resources, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2025 |
| 11333 | Trailhead Exploration, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |
| 11334 | Trans Terra Corp., International | Amarillo, TX 79159 | Oil & Gas Operator | Feb 2009 |
| 11335 | Trans Texas Minerals Company | Austin, TX 78714 | Oil & Gas Operator | Aug 1999 |
| 11336 | Trans-Pecos Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 11337 | Trans-Tex Operating LLC | Dallas, TX 75367 | Oil & Gas Operator | Oct 2025 |
| 11338 | Trans-Texas Energy Group LLC | Mineral Wells, TX 76068 | Oil & Gas Operator | Jul 2015 |
| 11339 | Transamerica Energy Corp. | Atlanta, GA 30356 | Oil & Gas Operator | Oct 2025 |
| 11340 | Transamerican Natural Gas Corp. | Houston, TX 77032 | Oil & Gas Operator | Aug 2000 |
| 11341 | Transatlantic Petr (USA) Corp. | Dallas, TX 75206 | Oil & Gas Operator | Oct 2025 |
| 11342 | Transcontinental Minerals Corp. | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2008 |
| 11343 | Transcontinental Shale L.L.C. | Austin, TX 78717 | Oil & Gas Operator | Feb 2016 |
| 11344 | Transfuel Resources Co | Houston, TX 77215 | Oil & Gas Operator | Aug 2013 |
| 11345 | Transoil, Inc. | Oklahoma City, OK 73129 | Oil & Gas Operator | Oct 2025 |
| 11346 | Transpacific Energy, LLC | Katy, TX 77450 | Oil & Gas Operator | Oct 2025 |
| 11347 | Transpetco I | Shreveport, LA 71101 | Oil & Gas Operator | May 2009 |
| 11348 | Transtexas Gas Corporation | Houston, TX 77265 | Oil & Gas Operator | Aug 2005 |
| 11349 | Trap Rock Oil Company | Cambridge, MA 02138 | Oil & Gas Operator | Nov 2005 |
| 11350 | Trap Rock Oil, LTD. | Houston, TX 77005 | Oil & Gas Operator | Oct 2025 |
| 11351 | Traton Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Mar 2019 |
| 11352 | Travelers Oil Company | Amarillo, TX 79102 | Oil & Gas Operator | Oct 2025 |
| 11353 | Travers Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 11354 | Travis | Houston, TX 77057 | Oil Operator | Oct 2025 |
| 11355 | Travis Operating, LLC | Kingwood, TX 77345 | Oil & Gas Operator | Oct 2025 |
| 11356 | Travis, J. J., Trustee | Rockport, TX 78382 | Oil & Gas Operator | Dec 1996 |
| 11357 | Treadaway Oil Co. | Balmorhea, TX 79718 | Oil & Gas Operator | Oct 2025 |
| 11358 | Treadstone Energy Partners, LLC | Houston, TX 77070 | Oil & Gas Operator | Jun 2016 |
| 11359 | Treadstone Energy PRTNR Op, LLC | Katy, TX 77494 | Oil & Gas Operator | Oct 2025 |
| 11360 | Treco Oil Company | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 11361 | Tree Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 11362 | Trejim Operators, LLC | Pampa, TX 79065 | Oil & Gas Operator | Oct 2025 |
| 11363 | Trek Aec, LLC | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 11364 | Trek Exploration, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Oct 2025 |
| 11365 | Trek Oil & Gas, Inc | Houston, TX 77002 | Oil Operator | Mar 1998 |
| 11366 | Trek Petroleum Company, Inc. | Midland, TX 79707 | Oil & Gas Operator | Oct 2025 |
| 11367 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Oct 2025 |
| 11368 | Tren Energy LLC | El Paso, TX 79912 | Oil & Gas Operator | Oct 2025 |
| 11369 | Trend Exploration Company | Midland, TX 79701 | Oil & Gas Operator | Mar 2008 |
| 11370 | Trend Exploration I LLC | Midland, TX 79701 | Oil & Gas Operator | May 2011 |
| 11371 | Trenna Oil Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2013 |
| 11372 | Tres Azores Oil & Gas, Inc. | Fort Worth, TX 76185 | Oil & Gas Operator | Aug 2003 |
| 11373 | Tres Operating Co., LLC | Katy, TX 77494 | Oil Operator | Oct 2025 |
| 11374 | Tres Piedras, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 1999 |
| 11375 | Tres Roughneckas WTX LLC | MC Camey, TX 79752 | Oil Operator | Oct 2025 |
| 11376 | Tresami, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Oct 2025 |
| 11377 | Trestle Creek Properties, LLC | Manchaca, TX 78652 | Oil & Gas Operator | Oct 2025 |
| 11378 | Trey Exploration, Inc. | San Angelo, TX 76901 | Oil & Gas Operator | Dec 2020 |
| 11379 | Trey Operating Company | MC Camey, TX 79752 | Oil Operator | Jan 2016 |
| 11380 | Trey Resources Inc. | Midland, TX 79710 | Oil & Gas Operator | Jun 2025 |
| 11381 | Trey Services, Inc. | Midland, TX 79711 | Oil & Gas Operator | Dec 1996 |
| 11382 | Tri "M" Oil & Gas | Muenster, TX 76252 | Oil & Gas Operator | Oct 2025 |
| 11383 | Tri City Oil Co., LLC | Kountze, TX 77625 | Oil Operator | Oct 2025 |
| 11384 | Tri Energy Resources, Inc. | Norman, OK 73070 | Oil Operator | Oct 2025 |
| 11385 | Tri Sportsmen Energy, Inc. | Austin, TX 78746 | Oil & Gas Operator | Oct 2025 |
| 11386 | Tri Star Operating, Inc. | Arlington, TX 76012 | Oil & Gas Operator | Jan 2002 |
| 11387 | Tri-Am Operating Company | Frankston, TX 75763 | Oil & Gas Operator | Oct 2025 |
| 11388 | Tri-C Resources, Inc. | Houston, TX 77024 | Oil & Gas Operator | Aug 2009 |
| 11389 | Tri-C Resources, LLC | Houston, TX 77024 | Oil & Gas Operator | Oct 2025 |
| 11390 | Tri-Dyne Resources, Inc. | Southern Pine, NC 28387 | Oil & Gas Operator | Feb 2000 |
| 11391 | Tri-Ex Petroleum, L.P. | Amarillo, TX 79101 | Oil & Gas Operator | Jan 2013 |
| 11392 | Tri-Force Operating, L.L.C. | Royse City, TX 75189 | Oil & Gas Operator | Oct 2025 |
| 11393 | Tri-K Production Company, Inc. | Olney, TX 76374 | Oil & Gas Operator | Apr 1996 |
| 11394 | Tri-State Exploration & Prod Inc | Marshall, TX 75671 | Oil & Gas Operator | Aug 2003 |
| 11395 | Tri-State Resources, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Sep 2012 |
| 11396 | Tri-State Sales & Production | Rodessa, LA 71069 | Oil & Gas Operator | Dec 2008 |
| 11397 | Tri-Tex Exploration LTD | Abilene, TX 79608 | Oil Operator | Apr 2019 |
| 11398 | Tri-Union Development Corp. | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 11399 | Tri-W Oil | Luling, TX 78648 | Oil Operator | Oct 2025 |
| 11400 | Tri-W Oil, Inc. | Luling, TX 78648 | Oil Operator | Apr 2007 |