| 301 | Taylor Petroleum LLC | Crescent, OK 73028-0340 | Oil & Gas Operator | Dec 2016 |
| 302 | Taylor Production Company | Collinsville, OK 74021 | Oil Operator | Nov 1998 |
| 303 | Taylor Properties | Wichita Falls, TX 76301 | Gas Operator | Sep 2025 |
| 304 | Taylor R C Companies Inc | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | May 2021 |
| 305 | Taylor R Clark Exploration Inc | | Oil & Gas Operator | Aug 1992 |
| 306 | Taylor Two Energy, LLC | Big Spring, TX 79720 | Oil & Gas Operator | Aug 2019 |
| 307 | Taylor, Ben J. Inc. | Fort Worth, TX 76185 | Oil & Gas Operator | Feb 2022 |
| 308 | Taylor, Dutch | Graham, TX 76450 | Oil & Gas Operator | Jan 2016 |
| 309 | Taylor, Frank Well Service | Cross Plains, TX 76443 | Oil & Gas Operator | Aug 2003 |
| 310 | Taylor, G. E. | Bridgeport, TX 76426 | Oil & Gas Operator | Jan 2001 |
| 311 | Taylor, G. E. Inc. | Bridgeport, TX 76426 | Oil & Gas Operator | Jul 2007 |
| 312 | Taylor, Gordon Oil Company | Sunray, TX 79086 | Oil & Gas Operator | Apr 1996 |
| 313 | Taylor, Gordon Oil Company, LP | Sunray, TX 79086 | Oil & Gas Operator | Feb 2014 |
| 314 | Taylor, J. S. Inc. | Lewisville, TX 75057 | Oil & Gas Operator | Sep 2025 |
| 315 | Taylor, Raymond C. Jr. | Woodway, TX 76712 | Oil & Gas Operator | Dec 2012 |
| 316 | Taylor, Smith And Kimbell | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2012 |
| 317 | Taylor, W H | | Gas Operator | Dec 2004 |
| 318 | Taylor-Brown Ope | | Oil Operator | Sep 1988 |
| 319 | Taylor-Clayton-Hawley | Wichita Falls, TX 76301 | Oil & Gas Operator | Nov 2019 |
| 320 | Taylor-Cranor Oi | | Oil Operator | Dec 1987 |
| 321 | Taylor-Link Operating Co. | Midland, TX 79702 | Oil & Gas Operator | Apr 2017 |
| 322 | Taylor-McIlhenny Oper. Co., Inc. | Lewisville, TX 75029 | Oil & Gas Operator | Jan 1996 |
| 323 | Taza Energy, Inc. | | Oil & Gas Operator | Nov 2009 |
| 324 | TB Operating, LLC | Borger, TX 79008 | Oil & Gas Operator | Jun 2018 |
| 325 | TB Petroleum, LLC | Petrolia, TX 76377 | Oil & Gas Operator | Sep 2025 |
| 326 | TB Properties | | Oil & Gas Operator | Jun 2025 |
| 327 | TBC Petroleum | Cuero, TX 77954 | Oil & Gas Operator | Sep 2023 |
| 328 | Tbi Exploration Inc | Englewood, CO 801556525 | Oil & Gas Operator | Jun 2011 |
| 329 | Tbi Production Company | Lakewood, CO 80228 | Oil & Gas Operator | Oct 2004 |
| 330 | TBM Catarina, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2025 |
| 331 | TBR Operating Company Inc. | | Gas Operator | Dec 2024 |
| 332 | TC Energy LLC | Covington, OK 73730-2116 | Oil & Gas Operator | Sep 2014 |
| 333 | TC Oil And Gas, LLC | Denton, TX 76205 | Oil Operator | Sep 2025 |
| 334 | TC Oil LLC | Duncan, OK 73533 | Oil Operator | Jun 2025 |
| 335 | TC3 Energy Company | Dallas, TX 75248 | Oil & Gas Operator | Sep 2025 |
| 336 | TC3 Energy Services Company | Bryan, TX 77805 | Oil & Gas Operator | Jan 2005 |
| 337 | TC3 Operating Co. | Dallas, TX 75248 | Oil & Gas Operator | Jul 1996 |
| 338 | TCC Royalty Corporation | Centennial, CO 80112 | Gas Operator | Sep 2005 |
| 339 | TCF Energy, Inc. | Midland, TX 79704 | Oil & Gas Operator | Dec 2004 |
| 340 | TCF Inc | | Gas Operator | Dec 1993 |
| 341 | Tchefuncte Natural Resources, L.L.C. | | Oil & Gas Operator | Aug 2011 |
| 342 | Tcina Inc | Seminole, OK 74868 | Oil & Gas Operator | May 2023 |
| 343 | TCRG Drilling & Operating, LLC | Fort Worth, TX 76107 | Oil Operator | Sep 2025 |
| 344 | TCS Petroleum Co., LLC | Abilene, TX 79608 | Oil & Gas Operator | Sep 2025 |
| 345 | TCT Operating Company, Inc. | Johnson City, TX 78636 | Oil & Gas Operator | Feb 2017 |
| 346 | TD & Associates, Inc. | | Oil & Gas Operator | Jun 1998 |
| 347 | TD Natural Resources LLC | Cuero, TX 77954 | Oil & Gas Operator | Sep 2025 |
| 348 | TD Oil & Gas LLC | Duncan, OK 73533-1851 | Oil Operator | Apr 2023 |
| 349 | TD Operating Inc | Hinton, OK 73047 | Oil & Gas Operator | Jun 2025 |
| 350 | TDC Energy Corporation | | Oil & Gas Operator | Dec 2001 |
| 351 | TDC Engineering, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Sep 2025 |
| 352 | Tdi, Inc. | Hays, KS 67601 | Oil Operator | Apr 2025 |
| 353 | Tdoc, Inc | Evansville, IN 47716 | Oil Operator | Dec 2022 |
| 354 | Tdot Oil, Inc. | Sedan, KS 67361 | Oil Operator | Apr 2025 |
| 355 | TDR Construction, Inc. | Wellsville, KS 66092 | Oil Operator | Apr 2025 |
| 356 | TDT Production, Inc. | Capitola, CA 95010 | Oil & Gas Operator | Aug 2003 |
| 357 | TDX Energy, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2024 |
| 358 | Te-Pe Oil & Gas | | Oil & Gas Operator | Apr 2025 |
| 359 | Te-Ray Energy, Inc. | Oklahoma City, OK 73108 | Oil & Gas Operator | May 2025 |
| 360 | Te-Ray Resources, Inc. | Oklahoma City, OK 73108 | Oil & Gas Operator | Mar 2015 |
| 361 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Sep 2025 |
| 362 | Teaco | Snyder, TX 79550 | Oil & Gas Operator | Jan 1998 |
| 363 | Teafatiller Limuel & Rita | Marietta, OK 73448-0321 | Oil & Gas Operator | Feb 2002 |
| 364 | Teagarden David W | Glenford, OH 43739 | Oil & Gas Operator | Dec 2020 |
| 365 | Teague Operating Co. | Mabank, TX 75147 | Oil & Gas Operator | Jul 1995 |
| 366 | Teague, J. V. & Robinson, E. W. | Olney, TX 76374 | Oil & Gas Operator | May 1996 |
| 367 | Teakwood Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Nov 2019 |
| 368 | Teal Energy USA, Inc. | Houston, TX 77057 | Oil & Gas Operator | Sep 2025 |
| 369 | Teal Exploration, LLC | Abilene, TX 79602 | Oil Operator | Sep 2025 |
| 370 | Teal Operating, LLC | Dallas, TX 75225 | Oil & Gas Operator | Oct 2021 |
| 371 | Teal Petroleum Co. | | Oil & Gas Operator | Sep 1978 |
| 372 | Teale F William | Tulsa, OK 74136-1017 | Oil & Gas Operator | Jun 2000 |
| 373 | Team Operating, L.L.C. | Pinehurst, TX 77362 | Oil & Gas Operator | Sep 2025 |
| 374 | Teamco Operating LLC | Houston, TX 77042 | Oil & Gas Operator | Oct 2002 |
| 375 | Teapot Oil & Refining Company | Billings, MT 59101 | Oil & Gas Operator | Mar 2012 |
| 376 | Teavee Oil & Gas, Inc. | Charleston, WV 25301-0000 | Oil & Gas Operator | Dec 2021 |
| 377 | Tebco Oil & Gas | | Oil & Gas Operator | Sep 1996 |
| 378 | Tec Drilling Com | | Oil Operator | Feb 1982 |
| 379 | Tec Resources, L.L.C. | Tulsa, OK 74128 | Oil & Gas Operator | May 2013 |
| 380 | Tech American Re | | Oil Operator | Sep 1985 |
| 381 | Tech Resources, Inc. | Georgetown, TX 78628 | Oil & Gas Operator | Dec 2001 |
| 382 | Technical Energy Services, Inc. | Norman, OK 73070 | Oil & Gas Operator | May 2025 |
| 383 | Technology & Engr. Careers Inc. | Houston, TX 77063 | Oil Operator | Dec 2017 |
| 384 | Techsys Resources LLC | Houston, TX 77224 | Gas Operator | Aug 2015 |
| 385 | Teco Oil & Gas, Inc. | Tampa, FL 33601 | Oil & Gas Operator | Nov 1997 |
| 386 | Teco Operating Company | Athens, TX 75751 | Oil & Gas Operator | Jun 2001 |
| 387 | Tecolote Energy Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Jan 2024 |
| 388 | Tecolote Petroleum Corp.,Inc. | Friendswood, TX 77546 | Oil & Gas Operator | Mar 2011 |
| 389 | Tecpetrol Operating LLC | Houston, TX 77027 | Oil & Gas Operator | Dec 2015 |
| 390 | Tecton Energy Operating LLC | | Oil Operator | Apr 2009 |
| 391 | Ted Koble Operator | | Oil & Gas Operator | Nov 2007 |
| 392 | Tedco | | Gas Operator | Nov 1988 |
| 393 | Tedik Limited Partnership | Williamson, WV 25661-0000 | Gas Operator | Dec 2021 |
| 394 | Tee Cee'S Inc | Drumright, OK 74030 | Oil & Gas Operator | Jun 2025 |
| 395 | Tee Operating Company | | Oil & Gas Operator | Jun 1989 |
| 396 | Teel 78 A | | Gas Operator | Dec 1980 |
| 397 | Teepee Oil & Gas Inc | Yukon, OK 73085 | Oil Operator | Dec 2006 |
| 398 | Teg Midcontinent, Inc. | Aurora, CO 80014 | Oil Operator | Jul 2013 |
| 399 | Tega Operating Co. | Dallas, TX 75201 | Oil & Gas Operator | Nov 2012 |
| 400 | Tehi Illinois, LLC | Olney, IL 62450 | Oil & Gas Operator | Feb 2019 |