| 6201 | True Performance Administrators LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 6202 | Trueblood Resources, Inc. | Denver, CO 80222 | Oil & Gas Operator | Dec 2025 |
| 6203 | Truevine Gas Company | Ada, OK 74821-1422 | Oil & Gas Operator | Oct 2025 |
| 6204 | Truevine Operating LLC | Ada, OK 74821-1422 | Oil & Gas Operator | Nov 2025 |
| 6205 | Truluck Enterprises LLC | Wichita Falls, TX 76308-4454 | Oil & Gas Operator | Apr 2015 |
| 6206 | Tsalta Corporation | Oklahoma City, OK 73116 | Oil & Gas Operator | Nov 1998 |
| 6207 | Tucker Gary & Deedee | Jennings, OK 74038 | Oil & Gas Operator | Jun 2025 |
| 6208 | Tucker Ron & Co | Norman, OK 73069-8511 | Gas Operator | Sep 2017 |
| 6209 | Tucker, Timothy R | | Oil Operator | Oct 2025 |
| 6210 | Tucson Oil & Gas Inc | | Oil & Gas Operator | Aug 1994 |
| 6211 | Tulsa Energy Inc | Tulsa, OK 74133 | Oil & Gas Operator | May 2013 |
| 6212 | Tulsa Energy Partners LLC | Tulsa, OK 74103-4461 | Oil & Gas Operator | Nov 2025 |
| 6213 | Tulsa Minerals Inc | Tulsa, OK 74136-1045 | Oil & Gas Operator | May 2013 |
| 6214 | Tulum Corporation | Oklahoma City, OK 73101-0125 | Oil & Gas Operator | Feb 2025 |
| 6215 | Turnbow John R Company | Tulsa, OK 74120-2420 | Oil & Gas Operator | Aug 2006 |
| 6216 | Turner John O | Drumright, OK 74030-1216 | Oil & Gas Operator | Feb 1998 |
| 6217 | Turner Oil Company | Yale, OK 74085-0234 | Oil & Gas Operator | Nov 2014 |
| 6218 | Turner Randall L | Duncan, OK 73533-4826 | Oil Operator | Oct 2025 |
| 6219 | Turner Resources Inc | Hennessey, OK 73742 | Oil & Gas Operator | Nov 2025 |
| 6220 | Turntable Energy Inc | Ponca City, OK 74604 | Oil & Gas Operator | Oct 2025 |
| 6221 | Turpin Ledon Production | Ada, OK 74820-0549 | Oil Operator | Oct 2025 |
| 6222 | Tuscany Operating LLC | Oklahoma City, OK 73106 | Oil & Gas Operator | Sep 2014 |
| 6223 | Tuthill S Keith & Bill Barbee | Amarillo, TX 79101-1427 | Oil & Gas Operator | Dec 2004 |
| 6224 | Twain Energy LLC | Ridgeland, MS 39157 | Oil & Gas Operator | Nov 2025 |
| 6225 | Twenty First Century Res Inc | Lajolla, CA 92037-7044 | Oil & Gas Operator | Mar 2015 |
| 6226 | Twenty/Twenty Oil & Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Nov 2025 |
| 6227 | Twilight Energy LLC | Fort Worth, TX 76185 | Oil & Gas Operator | Dec 2025 |
| 6228 | Twin Eagle Petroleum Corp | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2002 |
| 6229 | Twisted Oak Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Nov 2025 |
| 6230 | Twisted Resources Inc | Blanchard, OK 73010-8463 | Oil & Gas Operator | Oct 2025 |
| 6231 | Two Forks Operating LLC | Ponca City, OK 74601-7815 | Oil & Gas Operator | Oct 2025 |
| 6232 | Two Gems Company | McAlester, OK 74502-1996 | Oil & Gas Operator | Oct 2025 |
| 6233 | Two Pines | Drumright, OK 74030-5502 | Oil & Gas Operator | Feb 2012 |
| 6234 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 6235 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |
| 6236 | Tyler Enterprises Inc | Bristow, OK 74010-3192 | Oil & Gas Operator | Feb 2004 |
| 6237 | Tyler, Scott A | | Oil & Gas Operator | Oct 2025 |
| 6238 | Tyler, Steven Lee | | Oil Operator | May 2014 |
| 6239 | Tyson Gary | Hobart, OK 73651-6413 | Oil & Gas Operator | Mar 2018 |
| 6240 | Tyson Olan | Hobart, OK 73651-6413 | Oil & Gas Operator | Apr 2015 |
| 6241 | Tytan Operating Company LLC | Edmond, OK 73083-3794 | Oil & Gas Operator | May 2016 |
| 6242 | U S Drilling Company Inc | Holdenville, OK 74848-0913 | Oil & Gas Operator | Mar 2017 |
| 6243 | U. S. Energy Development Corporation | Fort Worth, TX 76164 | Oil & Gas Operator | Dec 2025 |
| 6244 | U.S. Oil Reclaimers, LLC | | Oil Operator | Jun 2023 |
| 6245 | Ultramar Oil & Gas LTD | Houston, TX 77060 | Oil & Gas Operator | Jul 1995 |
| 6246 | Umberham Oil Company Inc | Oklahoma City, OK 73151-4000 | Oil & Gas Operator | Oct 2025 |
| 6247 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 6248 | Unbridled Resources, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 6249 | Underwood Oil And Gas LLC | Chandler, OK 74834-1414 | Oil & Gas Operator | Nov 2025 |
| 6250 | Unicon Producing Company | Houston, TX 75252 | Gas Operator | Mar 1994 |
| 6251 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 6252 | Union Texas Petroleum Corp | Houston, TX 77252-2120 | Oil & Gas Operator | Dec 2014 |
| 6253 | Union Valley Petroleum Corp | Enid, OK 73701 | Oil & Gas Operator | Nov 2025 |
| 6254 | Unit Drilling & Exploration Co | Tulsa, OK 74132-5300 | Oil & Gas Operator | Sep 2025 |
| 6255 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Dec 2025 |
| 6256 | United Energy & Expl Inc | Ada, OK 74821-2449 | Oil & Gas Operator | Oct 2025 |
| 6257 | United Energy & Exploration LLC | Ada, OK 74821 | Oil & Gas Operator | Nov 2025 |
| 6258 | United Energy Develop Co LTD | Bartlesville, OK 74003 | Oil Operator | Mar 2004 |
| 6259 | United Energy Operating, LLC | Edmond, OK 73083 | Oil & Gas Operator | Dec 2025 |
| 6260 | United Oil Corporation | Denver, CO 80202-3813 | Oil & Gas Operator | Oct 2025 |
| 6261 | United Primary Resources Inc | Milton, WA 98354-9361 | Oil & Gas Operator | Feb 2016 |
| 6262 | United Producers Inc | Broken Arrow, OK 74012-8247 | Oil & Gas Operator | Mar 2020 |
| 6263 | United Production Company LLC | Edmond, OK 73003 | Oil & Gas Operator | Nov 2025 |
| 6264 | United States Gypsum Company | Oakfield, NY 14125 | Oil & Gas Operator | Dec 2024 |
| 6265 | United Texas Petroleum Inc. | McKinney, TX 75070 | Oil & Gas Operator | Dec 2025 |
| 6266 | United Western Energy Corp | Oklahoma City, OK 73105 | Oil & Gas Operator | Mar 1994 |
| 6267 | Universal Drilling Company | Denver, CO 80203 | Oil & Gas Operator | Sep 2003 |
| 6268 | Universal Exploration Inc | Wadsworth, OH 44281-9460 | Oil & Gas Operator | Feb 2012 |
| 6269 | Universal Fuels Company | | Oil & Gas Operator | Oct 1993 |
| 6270 | Upland Operating, LLC | Dallas, TX 75226 | Oil & Gas Operator | Dec 2025 |
| 6271 | Upland Production Company | Edmond, OK 73083 | Oil & Gas Operator | Dec 2025 |
| 6272 | Upland Resources, Inc. | Canadian, TX 79014 | Oil & Gas Operator | Dec 2009 |
| 6273 | Uplands Resources Inc | Tulsa, OK 74103-4141 | Oil & Gas Operator | Oct 2025 |
| 6274 | Uptex Operating, L.P. | Dallas, TX 75201 | Oil & Gas Operator | May 2010 |
| 6275 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Dec 2025 |
| 6276 | Usedc Okc LLC | Getzville, NY 14068-1296 | Oil & Gas Operator | May 2018 |
| 6277 | V A B Inc | Weleetka, OK 74880 | Oil & Gas Operator | Jan 2007 |
| 6278 | V S Oil Company | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 2025 |
| 6279 | Vaca Operating Company LLC | Pacific PLSDS, CA 90272 | Oil & Gas Operator | Aug 2017 |
| 6280 | Vaco Oil Company | Cleveland, OK 74020 | Oil & Gas Operator | Jun 2003 |
| 6281 | Valancy Operating LLC | Goldsby, OK 73093 | Oil & Gas Operator | Nov 2025 |
| 6282 | Valar Petroleum Inc | Houston, TX 77069 | Oil & Gas Operator | May 2006 |
| 6283 | Valence Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Dec 2025 |
| 6284 | Valiant Oil & Inv Co | | Oil & Gas Operator | Oct 2025 |
| 6285 | Validus Energy II Midcon LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 6286 | Validus Inc | Fort Lauderdale, FL 33304 | Oil & Gas Operator | Oct 2025 |
| 6287 | Valjohn Energy Corporation | Dover, OK 73734 | Oil & Gas Operator | Nov 2025 |
| 6288 | Valley Oil & Gas Inc | | Oil & Gas Operator | Nov 2013 |
| 6289 | Valley Petrol Consulting Inc | Denton, TX 76205 | Oil Operator | Oct 2025 |
| 6290 | Valpoint Operating, LLC | Amarillo, TX 79101 | Oil & Gas Operator | Dec 2025 |
| 6291 | Van Dall, Don | | Oil Operator | Mar 2015 |
| 6292 | Van Horn I H | Tulsa, OK 74145-5715 | Oil & Gas Operator | Mar 2001 |
| 6293 | Van Horn Oil & Gas Inc | Tulsa, OK 74170 | Oil & Gas Operator | Nov 1998 |
| 6294 | Van Horn Oil Company | Ada, OK 74820 | Oil & Gas Operator | Oct 1999 |
| 6295 | Van Orsdol Paul | Bristow, OK 74010 | Oil & Gas Operator | Oct 2025 |
| 6296 | Van Zandt Marilyn | Depew, OK 74028 | Gas Operator | Nov 2025 |
| 6297 | Vancol Oil Co Inc | Ponca City, OK 74602-0030 | Oil & Gas Operator | May 2018 |
| 6298 | Vanderbilt Resources Corp. | Midland, TX 79701 | Oil & Gas Operator | Nov 1991 |
| 6299 | Vanguard Permian, LLC | Houston, TX 77057 | Oil & Gas Operator | Nov 2018 |
| 6300 | Vanon Energy Inc | Fort Worth, TX 76162 | Oil & Gas Operator | Jul 2022 |