| 28301 | Tdot Oil, Inc. | Sedan, KS 67361 | Oil Operator | Dec 2025 |
| 28302 | TDR Construction, Inc. | Wellsville, KS 66092 | Oil Operator | Dec 2025 |
| 28303 | TDT Production, Inc. | Capitola, CA 95010 | Oil & Gas Operator | Aug 2003 |
| 28304 | TDX Energy, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2024 |
| 28305 | Te-Pe Oil & Gas | | Oil & Gas Operator | Dec 2025 |
| 28306 | Te-Ray Energy Inc | Oklahoma City, OK 73108 | Oil & Gas Operator | Dec 2025 |
| 28307 | Te-Ray Resources, Inc. | Oklahoma City, OK 73108 | Oil & Gas Operator | Mar 2015 |
| 28308 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2026 |
| 28309 | Teaco | Snyder, TX 79550 | Oil & Gas Operator | Jan 1998 |
| 28310 | Teafatiller Limuel & Rita | Marietta, OK 73448-0321 | Oil & Gas Operator | Feb 2002 |
| 28311 | Teagarden David W | Glenford, OH 43739 | Oil & Gas Operator | Dec 2020 |
| 28312 | Teague Operating Co. | Mabank, TX 75147 | Oil & Gas Operator | Jul 1995 |
| 28313 | Teague, J. V. & Robinson, E. W. | Olney, TX 76374 | Oil & Gas Operator | May 1996 |
| 28314 | Teakwood Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Nov 2019 |
| 28315 | Teal Energy USA, Inc. | Houston, TX 77057 | Oil & Gas Operator | Apr 2026 |
| 28316 | Teal Exploration, LLC | Abilene, TX 79602 | Oil Operator | Apr 2026 |
| 28317 | Teal Operating, LLC | Dallas, TX 75225 | Oil & Gas Operator | Oct 2021 |
| 28318 | Teal Petroleum Co. | | Oil & Gas Operator | Sep 1978 |
| 28319 | Teale F William | Tulsa, OK 74136-1017 | Oil & Gas Operator | Jun 2000 |
| 28320 | Team Operating, L.L.C. | Pinehurst, TX 77362 | Oil & Gas Operator | Apr 2026 |
| 28321 | Teamco Operating LLC | Houston, TX 77042 | Oil & Gas Operator | Oct 2002 |
| 28322 | Teapot Oil & Refining Company | Billings, MT 59101 | Oil & Gas Operator | Mar 2012 |
| 28323 | Teavee Oil & Gas, Inc. | Charleston, WV 25301-0000 | Oil & Gas Operator | Dec 2021 |
| 28324 | Tebco Oil & Gas | | Oil & Gas Operator | Sep 1996 |
| 28325 | Tec Drilling Com | | Oil Operator | Feb 1982 |
| 28326 | Tec Resources LLC | Tulsa, OK 74128 | Oil & Gas Operator | May 2013 |
| 28327 | Tech American Re | | Oil Operator | Sep 1985 |
| 28328 | Tech Resources, Inc. | Georgetown, TX 78628 | Oil & Gas Operator | Dec 2001 |
| 28329 | Technical Energy Services, Inc. | Norman, OK 73070 | Oil & Gas Operator | Dec 2025 |
| 28330 | Technology & Engr. Careers Inc. | Houston, TX 77063 | Oil Operator | Dec 2017 |
| 28331 | Techsys Resources LLC | Houston, TX 77224 | Gas Operator | Aug 2015 |
| 28332 | Teco Oil & Gas, Inc. | Tampa, FL 33601 | Oil & Gas Operator | Nov 1997 |
| 28333 | Teco Operating Company | Athens, TX 75751 | Oil & Gas Operator | Jun 2001 |
| 28334 | Tecolote Energy Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Jan 2024 |
| 28335 | Tecolote Petroleum Corp.,Inc. | Friendswood, TX 77546 | Oil & Gas Operator | Mar 2011 |
| 28336 | Tecpetrol Operating LLC | Houston, TX 77027 | Oil & Gas Operator | Dec 2015 |
| 28337 | Tecton Energy Operating LLC | | Oil Operator | Apr 2009 |
| 28338 | Ted Koble Operator | | Oil & Gas Operator | Nov 2007 |
| 28339 | Tedco | | Gas Operator | Nov 1988 |
| 28340 | Tedik Limited Partnership | Williamson, WV 25661-0000 | Gas Operator | Dec 2021 |
| 28341 | Tee Cee'S Inc | Drumright, OK 74030 | Oil & Gas Operator | Jan 2026 |
| 28342 | Tee Operating Company | | Oil & Gas Operator | Jun 1989 |
| 28343 | Teel 78 A | | Gas Operator | Dec 1980 |
| 28344 | Teepee Oil & Gas Inc | Yukon, OK 73085 | Oil Operator | Dec 2006 |
| 28345 | Teg Midcontinent, Inc. | Aurora, CO 80014 | Oil Operator | Jul 2013 |
| 28346 | Tega Operating Co. | Dallas, TX 75201 | Oil & Gas Operator | Nov 2012 |
| 28347 | Tehi Illinois, LLC | Olney, IL 62450 | Oil & Gas Operator | Feb 2019 |
| 28348 | Teichgraeber Oil | | Oil Operator | Nov 1995 |
| 28349 | Teichgraeber Oil Co. | | Oil Operator | Dec 1994 |
| 28350 | Teichgraeber Oil, Inc. | Eureka, KS 67045 | Oil & Gas Operator | Dec 2024 |
| 28351 | Tej Ventures | | Oil & Gas Operator | Dec 2002 |
| 28352 | Tejas Gas Pipeline Company | Houston, TX 77010 | Oil & Gas Operator | Apr 1998 |
| 28353 | Tejas Gas Pipeline, L.P. | Houston, TX 77002 | Oil & Gas Operator | Feb 2002 |
| 28354 | Tejas Jack Sales, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Apr 2026 |
| 28355 | Tejas Operating Company, Inc. | Houston, TX 77257 | Oil & Gas Operator | May 1995 |
| 28356 | Tejas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2026 |
| 28357 | Tejas Operators, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 28358 | Tejas Permian Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 28359 | Tejas Petroleum Resources, LLC | Aubrey, TX 76227 | Oil & Gas Operator | Apr 2026 |
| 28360 | Tejas Production Company | | Oil Operator | Nov 1979 |
| 28361 | Tejas Trucking, Inc. | Andrews, TX 79714 | Oil & Gas Operator | Apr 2026 |
| 28362 | Tejas Western Corp. | Granbury, TX 76048 | Oil & Gas Operator | Jul 2018 |
| 28363 | Tejones Operating Corporation | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2026 |
| 28364 | Teke Production LLC | Houston, TX 77269 | Oil Operator | Apr 2026 |
| 28365 | Tekenergy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 28366 | Tekna Synergy Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 28367 | Teko Oil & Gas I | | Oil Operator | Aug 1992 |
| 28368 | Teleo Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Apr 2009 |
| 28369 | Telesis Operating Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Apr 2026 |
| 28370 | Telico Minerals, L.L.C. | | Oil & Gas Operator | Oct 2019 |
| 28371 | Tellurian Operating LLC | | Oil & Gas Operator | Jun 2024 |
| 28372 | Tellus Energy, LLC | | Oil & Gas Operator | Dec 2024 |
| 28373 | Tellus Operating Group, LLC | | Oil & Gas Operator | Jan 2026 |
| 28374 | Tema Oil And Gas Company | Houston, TX 77084 | Oil & Gas Operator | Apr 2026 |
| 28375 | Tema Oil And Gas, LLC | Houston, TX 77040 | Oil & Gas Operator | Apr 2000 |
| 28376 | Tema Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Jun 2009 |
| 28377 | Temagami Oil & Gas LTD | | Oil & Gas Operator | May 2007 |
| 28378 | Tember Oil Company | Holliday, TX 76366 | Oil & Gas Operator | Apr 2026 |
| 28379 | Temblor Petroleum Co. LLC | | Oil & Gas Operator | Dec 2025 |
| 28380 | Temescal Resources LLC | | Oil & Gas Operator | Dec 2025 |
| 28381 | Temex Energy Inc | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2002 |
| 28382 | Tempest Energy Resources, LP | Houston, TX 77251 | Oil & Gas Operator | Jun 2013 |
| 28383 | Tempest Oil Company, Inc. | | Oil & Gas Operator | Jul 1978 |
| 28384 | Templar Operating LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Dec 2025 |
| 28385 | Temple Oil & Gas Co | Crooksville, OH 43731 | Oil & Gas Operator | Dec 2024 |
| 28386 | Temple Oil Co | | Oil & Gas Operator | Oct 1992 |
| 28387 | Temple Resources LLC | | Oil Operator | Dec 2025 |
| 28388 | Templeton Energy Inc | | Oil & Gas Operator | Jul 1987 |
| 28389 | Templeton Oil, Inc. | Houston, TX 77002 | Oil & Gas Operator | Nov 1994 |
| 28390 | Tempo Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 28391 | Tempo Resources GP, LLC | Mineral Wells, TX 76068 | Oil & Gas Operator | Apr 2013 |
| 28392 | Ten A Coal Company | Bridgeport, WV 26330 | Oil & Gas Operator | Dec 2020 |
| 28393 | Ten Grand Energy Company Inc | Nachogdoches, TX 75963-1880 | Oil Operator | Mar 2011 |
| 28394 | Tenaska Res LLC | Canonsburg, PA 15317 | Gas Operator | May 2020 |
| 28395 | Tend Oil Inc. | Tyler, TX 75703 | Oil & Gas Operator | Jul 1995 |
| 28396 | Tender Equity Corporation | Marietta, OH 45750 | Oil & Gas Operator | Dec 2007 |
| 28397 | Tenex Corporation | Houston, TX 77227 | Oil & Gas Operator | Dec 2007 |
| 28398 | Tenex Oil Corpor | | Oil Operator | May 1991 |
| 28399 | Tenexco Inc | Oakbrook Terrace, IL 60181 | Gas Operator | Dec 1998 |
| 28400 | Tengasco, Inc. | Houston, TX 77063 | Oil & Gas Operator | Dec 2025 |