| 301 | Trinity Operating (Usg), LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 302 | Trinity Resources, Inc. | Houston, TX 77277 | Oil & Gas Operator | May 2020 |
| 303 | Trio Consulting & MGMT LLC | Wichita Falls, TX 76301 | Oil Operator | Oct 2025 |
| 304 | Trio Operating Company, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2006 |
| 305 | Triple "S" Gas, Inc. | Louisville, KY 40255 | Oil & Gas Operator | Dec 2025 |
| 306 | Triple "S" Resources Inc | Sapulpa, OK 74066 | Oil & Gas Operator | Jun 1995 |
| 307 | Triple 7 Energy Company Inc | Prague, OK 74864 | Oil Operator | Feb 1997 |
| 308 | Triple B Resources | Barnsdall, OK 74002-9759 | Oil & Gas Operator | May 2014 |
| 309 | Triple C Properties Inc | Seminole, OK 74818 | Oil & Gas Operator | Jul 2025 |
| 310 | Triple Diamond Energy Operating LLC | Dallas, TX 75254-8352 | Oil & Gas Operator | Jun 2014 |
| 311 | Triple G Well Service, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Dec 2025 |
| 312 | Triple H Operating | Tryon, OK 74875-6235 | Oil Operator | Apr 2022 |
| 313 | Triple L Management Co Inc | Edmond, OK 73025-2908 | Oil & Gas Operator | Apr 2018 |
| 314 | Triple S Drilling Company | Leonard, OK 74043 | Oil & Gas Operator | Feb 2012 |
| 315 | Triple W Oil Inc | Chandler, OK 74834-0546 | Oil & Gas Operator | May 2013 |
| 316 | Tripledee Drilling Co Inc | Ardmore, OK 73402-1888 | Oil & Gas Operator | Dec 2015 |
| 317 | Tripledee Operating Company LLC | Ardmore, OK 73401 | Oil & Gas Operator | Nov 2022 |
| 318 | Triplett Larry W | Oklahoma City, OK 73112-5325 | Oil & Gas Operator | Mar 2015 |
| 319 | Tripower Resources LLC | Ardmore, OK 73402 | Oil & Gas Operator | Dec 2025 |
| 320 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 321 | Trissell Alva Lee | Willow, OK 73673-9602 | Oil Operator | Apr 2020 |
| 322 | Tritex Production Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Jan 2013 |
| 323 | Triton Oil & Gas Corp. | Houston, TX 77002 | Oil & Gas Operator | Nov 2014 |
| 324 | Triumph Energy Inc | Lafayette, LA 70505 | Oil & Gas Operator | Nov 2015 |
| 325 | Triumph Energy Partners LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | Oct 2025 |
| 326 | Triumph Resources Inc | Oklahoma City, OK 73114 | Oil & Gas Operator | Nov 2004 |
| 327 | Trivestco Energy Company | Ponca City, OK 74601 | Oil & Gas Operator | Oct 2025 |
| 328 | Trojan Resources LLC | Sapulpa, OK 74066-8095 | Oil Operator | Aug 2025 |
| 329 | Trout Disposal Well Inc | Hammon, OK 73650 | Oil & Gas Operator | Jan 2025 |
| 330 | Troy Energy Operating LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Oct 2025 |
| 331 | Troyer Howard E | Tulsa, OK 74133-8016 | Oil & Gas Operator | Dec 2014 |
| 332 | TRP Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2025 |
| 333 | TRP-Ok Properties LLC | Norman, OK 73072 | Oil & Gas Operator | Sep 2025 |
| 334 | Tru Operating LLC | Denton, TX 76201 | Oil & Gas Operator | Apr 2023 |
| 335 | Truckers Disposal Inc | Skiatook, OK 74070 | Oil & Gas Operator | Oct 2025 |
| 336 | True Performance Administrators LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 337 | Trueblood Resources, Inc. | Denver, CO 80222 | Oil & Gas Operator | Dec 2025 |
| 338 | Truevine Gas Company | Ada, OK 74821-1422 | Oil & Gas Operator | Sep 2025 |
| 339 | Truevine Operating LLC | Ada, OK 74821-1422 | Oil & Gas Operator | Oct 2025 |
| 340 | Truluck Enterprises LLC | Wichita Falls, TX 76308-4454 | Oil & Gas Operator | Apr 2015 |
| 341 | Tsalta Corporation | Oklahoma City, OK 73116 | Oil & Gas Operator | Nov 1998 |
| 342 | Tucker Gary & Deedee | Jennings, OK 74038 | Oil & Gas Operator | Jun 2025 |
| 343 | Tucker Ron & Co | Norman, OK 73069-8511 | Gas Operator | Sep 2017 |
| 344 | Tucker, Timothy R | | Oil Operator | Sep 2025 |
| 345 | Tucson Oil & Gas Inc | | Oil & Gas Operator | Aug 1994 |
| 346 | Tulsa Energy Inc | Tulsa, OK 74133 | Oil & Gas Operator | May 2013 |
| 347 | Tulsa Energy Partners LLC | Tulsa, OK 74103-4461 | Oil & Gas Operator | Oct 2025 |
| 348 | Tulsa Minerals Inc | Tulsa, OK 74136-1045 | Oil & Gas Operator | May 2013 |
| 349 | Tulum Corporation | Oklahoma City, OK 73101-0125 | Oil & Gas Operator | Feb 2025 |
| 350 | Turnbow John R Company | Tulsa, OK 74120-2420 | Oil & Gas Operator | Aug 2006 |
| 351 | Turner John O | Drumright, OK 74030-1216 | Oil & Gas Operator | Feb 1998 |
| 352 | Turner Oil Company | Yale, OK 74085-0234 | Oil & Gas Operator | Nov 2014 |
| 353 | Turner Randall L | Duncan, OK 73533-4826 | Oil Operator | Jun 2025 |
| 354 | Turner Resources Inc | Hennessey, OK 73742 | Oil & Gas Operator | Oct 2025 |
| 355 | Turntable Energy Inc | Ponca City, OK 74604 | Oil & Gas Operator | Jul 2025 |
| 356 | Turpin Ledon Production | Ada, OK 74820-0549 | Oil Operator | Oct 2025 |
| 357 | Tuscany Operating LLC | Oklahoma City, OK 73106 | Oil & Gas Operator | Sep 2014 |
| 358 | Tuthill S Keith & Bill Barbee | Amarillo, TX 79101-1427 | Oil & Gas Operator | Dec 2004 |
| 359 | Twain Energy LLC | Ridgeland, MS 39157 | Oil & Gas Operator | Oct 2025 |
| 360 | Twenty First Century Res Inc | Lajolla, CA 92037-7044 | Oil & Gas Operator | Mar 2015 |
| 361 | Twenty/Twenty Oil & Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Oct 2025 |
| 362 | Twilight Energy LLC | Fort Worth, TX 76185 | Oil & Gas Operator | Dec 2025 |
| 363 | Twin Eagle Petroleum Corp | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2002 |
| 364 | Twisted Oak Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Oct 2025 |
| 365 | Twisted Resources Inc | Blanchard, OK 73010-8463 | Oil & Gas Operator | Oct 2025 |
| 366 | Two Gems Company | McAlester, OK 74502-1996 | Oil & Gas Operator | Sep 2025 |
| 367 | Two Pines | Drumright, OK 74030-5502 | Oil & Gas Operator | Feb 2012 |
| 368 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 369 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |
| 370 | Tyler Enterprises Inc | Bristow, OK 74010-3192 | Oil & Gas Operator | Feb 2004 |
| 371 | Tyler, Scott A | | Oil & Gas Operator | Sep 2025 |
| 372 | Tyler, Steven Lee | | Oil Operator | May 2014 |
| 373 | Tyson Gary | Hobart, OK 73651-6413 | Oil & Gas Operator | Mar 2018 |
| 374 | Tyson Olan | Hobart, OK 73651-6413 | Oil & Gas Operator | Apr 2015 |
| 375 | Tytan Operating Company LLC | Edmond, OK 73083-3794 | Oil & Gas Operator | May 2016 |