| 30301 | Thomas Oil Company LLC | Ardmore, OK 73401-3717 | Oil Operator | Dec 2025 |
| 30302 | Thomas Oilers | | Oil & Gas Operator | Dec 2025 |
| 30303 | Thomas Operating Company Inc | Greeley, CO 80634 | Oil & Gas Operator | Aug 2008 |
| 30304 | Thomas Operating LTD. Co. | Dallas, TX 75220 | Oil & Gas Operator | Feb 2026 |
| 30305 | Thomas Production | Electra, TX 76360 | Oil & Gas Operator | Mar 2015 |
| 30306 | Thomas R Sivley | Southlake, TX 76092 | Oil & Gas Operator | Mar 2013 |
| 30307 | Thomas R. Banks | | Oil Operator | Nov 2025 |
| 30308 | Thomas Resources Corporation | Monahans, TX 79756 | Oil Operator | Mar 2008 |
| 30309 | Thomas Steel Strip Corp | Warren, OH 44485 | Oil & Gas Operator | Dec 2024 |
| 30310 | Thomas Turman | | Oil & Gas Operator | Dec 1991 |
| 30311 | Thomas Wayne Oil & Gas | Bristow, OK 74010-0544 | Oil & Gas Operator | Jan 2018 |
| 30312 | Thomas Well Serv | | Oil Operator | Dec 1996 |
| 30313 | Thomas Well Service, Inc. | Easton, KS 66020 | Oil Operator | Sep 2025 |
| 30314 | Thomas, B. K. | Plano, TX 75093 | Oil & Gas Operator | Jan 2008 |
| 30315 | Thomas, Ellis W | | Oil & Gas Operator | Nov 2025 |
| 30316 | Thomas, M.A. Oil Associates | Nocona, TX 76255 | Oil & Gas Operator | Feb 2026 |
| 30317 | Thomas, Mike | Nixon, TX 78140 | Oil Operator | Feb 2026 |
| 30318 | Thomas, R. W. Inc. | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 30319 | Thomas, T. N. Oil Company | Aiken, SC 29801 | Oil & Gas Operator | Feb 2026 |
| 30320 | Thomas, Vernon C. | Gardner, KS 66030 | Oil Operator | Jun 2015 |
| 30321 | Thomason Oil Com | | Oil Operator | Oct 1984 |
| 30322 | Thomason Petroleum, Inc | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 30323 | Thomasson Petroleum Enterprises, Inc | Bremen, KY 42325 | Oil Operator | Dec 2018 |
| 30324 | Thomfield Energy LLC | Kilgore, TX 75663 | Oil Operator | Feb 2026 |
| 30325 | Thompson Consumer Electronics | Indianapolis, IN 46290 | Oil & Gas Operator | Dec 1998 |
| 30326 | Thompson Drilling Company, Inc. | Independence, KS 67301 | Oil Operator | Sep 2001 |
| 30327 | Thompson Energy Resources LLC | | Oil & Gas Operator | Dec 2025 |
| 30328 | Thompson Engr & Prod Corp | Farmington, NM 87402 | Oil & Gas Operator | Apr 2019 |
| 30329 | Thompson Felton | Dewey, OK 74029 | Oil Operator | Jul 1999 |
| 30330 | Thompson Floyd Oil Co Inc | Boca Raton, FL 44328 | Oil & Gas Operator | Dec 1988 |
| 30331 | Thompson James R | Okmulgee, OK 74447 | Oil & Gas Operator | Sep 2025 |
| 30332 | Thompson Oil Co. | Corsicana, TX 75151 | Oil & Gas Operator | Nov 2025 |
| 30333 | Thompson Operating Co. | Abernathy, TX 79311 | Oil & Gas Operator | Aug 1994 |
| 30334 | Thompson Roy G | Bartlesville, OK 74006 | Oil & Gas Operator | Feb 1993 |
| 30335 | Thompson, Diana & Glenn | Fredonia, NY 14063 | Gas Operator | Dec 2024 |
| 30336 | Thompson, Don W | Herington, KS 67449 | Oil Operator | Jul 2003 |
| 30337 | Thompson, J C | Denver, CO 80237-2843 | Oil & Gas Operator | Jul 2005 |
| 30338 | Thompson, J. Cleo | Dallas, TX 75201 | Oil & Gas Operator | May 2024 |
| 30339 | Thompson, Joe L., Inc. | Oklahoma City, OK 73132 | Oil & Gas Operator | Oct 2005 |
| 30340 | Thompson, Kenneth L | Clarence Center, NY 14032 | Gas Operator | Dec 2024 |
| 30341 | Thompson, Larry N. Revocable Trust, Uid 5-20, 1997 | Elkhart, KS 67950 | Gas Operator | Sep 2006 |
| 30342 | Thompson, Mark P. | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 30343 | Thompson, Mark V. | South Dayton, NY 14138 | Gas Operator | Dec 2024 |
| 30344 | Thompson, Richard W. Inc. | Plano, TX 75024 | Oil & Gas Operator | Feb 2026 |
| 30345 | Thompson, Timothy G. | Delevan, NY 14042 | Gas Operator | Dec 2024 |
| 30346 | Thomsen Brothers Co., LLC | Lamont, KS 66855 | Oil Operator | Sep 2025 |
| 30347 | Thor Operating Company | Tyler, TX 75710 | Oil & Gas Operator | Dec 1995 |
| 30348 | Thor Production Co. | | Oil Operator | May 1997 |
| 30349 | Thor-Max Operating, Inc. | Plano, TX 75025 | Oil & Gas Operator | Feb 2026 |
| 30350 | Thornberry Family Partnership LTD. | New Waverly, TX 77358 | Oil Operator | Jun 2025 |
| 30351 | Thornberry Oilfield Service, Inc | Conroe, TX 77302 | Oil & Gas Operator | Aug 2003 |
| 30352 | Thorne Harold & | | Oil Operator | May 1994 |
| 30353 | Thornton & Brooks, Inc. | | Oil & Gas Operator | Oct 1990 |
| 30354 | Thornton Drilling Company Ptrnship | Eureka, KS 67045 | Oil Operator | Jun 2010 |
| 30355 | Thornton Oil Co. | Abilene, TX 79603 | Oil & Gas Operator | Aug 2003 |
| 30356 | Thornton Operating Corporation | Fort Worth, TX 76162 | Oil & Gas Operator | Jul 2014 |
| 30357 | Thornton Page Natural Gas | | Oil & Gas Operator | Dec 2024 |
| 30358 | Thornton, Michael D. | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 1995 |
| 30359 | Thoroughbred Associates LLC | Wichita, KS 67226 | Oil & Gas Operator | Sep 2025 |
| 30360 | Thorp Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Feb 2014 |
| 30361 | THP Operating LLC | Santa Anna, TX 76878 | Oil & Gas Operator | Feb 2026 |
| 30362 | THR Oil | Konawa, OK 74849 | Oil & Gas Operator | Jan 2014 |
| 30363 | Thrall Operating Company, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 30364 | Thrall Texas Oil, LLC | | Oil & Gas Operator | Jan 2025 |
| 30365 | Thrash, Afton | Kilgore, TX 75663 | Oil & Gas Operator | Apr 1996 |
| 30366 | Three "N" One Production | | Oil & Gas Operator | Dec 2011 |
| 30367 | Three Arrow Operating Company | Midland, TX 79705 | Oil & Gas Operator | Feb 2018 |
| 30368 | Three B Corporation | Fort Worth, TX 76179 | Gas Operator | Jun 2009 |
| 30369 | Three B Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 30370 | Three B, LP | Fort Worth, TX 76179 | Gas Operator | Feb 2026 |
| 30371 | Three Bros. Energy, Inc. | Ponca City, OK 74601 | Gas Operator | Dec 2013 |
| 30372 | Three Brothers Energy Inc. | Ponca City, OK 74601-4318 | Oil & Gas Operator | Sep 2000 |
| 30373 | Three C Consulting, Inc. | Magnolia, TX 77355 | Oil & Gas Operator | Aug 1995 |
| 30374 | Three C Exploration, LLC | Hebbronville, TX 78361 | Oil & Gas Operator | Feb 2026 |
| 30375 | Three D Oil Comp | | Oil & Gas Operator | Jan 1988 |
| 30376 | Three D Petroleum LLC | | Oil Operator | Dec 2024 |
| 30377 | Three D Resources Inc | Liberal, KS 67905 | Oil & Gas Operator | Sep 2025 |
| 30378 | Three D Submersible Pumps, Inc. | Heavener, OK 74937 | Oil & Gas Operator | Aug 2003 |
| 30379 | Three Forks Operating Co, LLC | Flatonia, TX 78941 | Oil & Gas Operator | Feb 2026 |
| 30380 | Three Forks Resources, LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Feb 2026 |
| 30381 | Three G Inc | Cody, WY 82414 | Oil & Gas Operator | Dec 1999 |
| 30382 | Three G Oil Co | Baird, TX 79504 | Oil & Gas Operator | Jun 2004 |
| 30383 | Three J Energy, Inc. | Seguin, TX 78155 | Oil & Gas Operator | Feb 2026 |
| 30384 | Three J Operating Company, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Feb 2026 |
| 30385 | Three J'S Petroleum, Inc. | Lubbock, TX 79423 | Oil & Gas Operator | Feb 2026 |
| 30386 | Three MG Family Inc | Holdenville, OK 74848 | Oil & Gas Operator | May 2013 |
| 30387 | Three Mile Joint Venture | Houston, TX 77027 | Oil & Gas Operator | Jul 1995 |
| 30388 | Three P Operating Co.,GP, L.L.C. | Newcastle, TX 76372 | Oil & Gas Operator | Feb 2026 |
| 30389 | Three P Operating Company | Newcastle, TX 76372 | Oil & Gas Operator | Nov 2007 |
| 30390 | Three Point Energy L.L.C. | Atlanta, TX 75551 | Oil Operator | Feb 2026 |
| 30391 | Three R Oil Company | Post, TX 79356 | Oil & Gas Operator | Feb 2026 |
| 30392 | Three Rivers Exploration LLC | Olpe, KS 66865 | Oil Operator | Sep 2023 |
| 30393 | Three Rivers Oper Co III LLC | Austin, TX 78735 | Oil & Gas Operator | Nov 2017 |
| 30394 | Three Rivers Operating Co II LLC | Austin, TX 78735 | Oil & Gas Operator | Mar 2017 |
| 30395 | Three Rivers Operating Co LLC | Austin, TX 78735 | Oil & Gas Operator | Mar 2017 |
| 30396 | Three S & T Oil Co., Inc. | | Oil & Gas Operator | May 1985 |
| 30397 | Three Sands Investment Company | Waukomis, OK 73773 | Oil & Gas Operator | Nov 2025 |
| 30398 | Three Sands Oil Inc | Perry, OK 73077 | Oil & Gas Operator | May 2023 |
| 30399 | Three Sisters Investments, LTD | | Oil & Gas Operator | Oct 1989 |
| 30400 | Three Sisters LLC | Cheyenne, WY 82001 | Oil Operator | Nov 2025 |