| 6101 | Tucson Oil & Gas Inc | | Oil & Gas Operator | Aug 1994 |
| 6102 | Tulsa Energy Inc | Tulsa, OK 74133 | Oil & Gas Operator | May 2013 |
| 6103 | Tulsa Energy Partners LLC | Tulsa, OK 74103-4461 | Oil & Gas Operator | Jul 2025 |
| 6104 | Tulsa Minerals Inc | Tulsa, OK 74136-1045 | Oil & Gas Operator | May 2013 |
| 6105 | Tulum Corporation | Oklahoma City, OK 73101-0125 | Oil & Gas Operator | Feb 2025 |
| 6106 | Turnbow John R Company | Tulsa, OK 74120-2420 | Oil & Gas Operator | Aug 2006 |
| 6107 | Turner John O | Drumright, OK 74030-1216 | Oil & Gas Operator | Feb 1998 |
| 6108 | Turner Oil Company | Yale, OK 74085-0234 | Oil & Gas Operator | Nov 2014 |
| 6109 | Turner Randall L | Duncan, OK 73533-4826 | Oil Operator | Jun 2025 |
| 6110 | Turner Resources Inc | Hennessey, OK 73742 | Oil & Gas Operator | Jul 2025 |
| 6111 | Turntable Energy Inc | Ponca City, OK 74604 | Oil & Gas Operator | Apr 2025 |
| 6112 | Turpin Ledon Production | Ada, OK 74820-0549 | Oil Operator | May 2025 |
| 6113 | Tuscany Operating LLC | Oklahoma City, OK 73106 | Oil & Gas Operator | Sep 2014 |
| 6114 | Tuthill S Keith & Bill Barbee | Amarillo, TX 79101-1427 | Oil & Gas Operator | Dec 2004 |
| 6115 | Twenty First Century Res Inc | Lajolla, CA 92037-7044 | Oil & Gas Operator | Mar 2015 |
| 6116 | Twenty/Twenty Oil & Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Jul 2025 |
| 6117 | Twilight Energy LLC | Fort Worth, TX 76185 | Oil & Gas Operator | Oct 2025 |
| 6118 | Twin Eagle Petroleum Corp | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2002 |
| 6119 | Twisted Oak Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2025 |
| 6120 | Twisted Resources Inc | Blanchard, OK 73010-8463 | Oil & Gas Operator | Jun 2025 |
| 6121 | Two Forks Operating LLC | Ponca City, OK 74601-7815 | Oil & Gas Operator | Jun 2025 |
| 6122 | Two Gems Company | McAlester, OK 74502-1996 | Oil & Gas Operator | Jun 2025 |
| 6123 | Two Pines | Drumright, OK 74030-5502 | Oil & Gas Operator | Feb 2012 |
| 6124 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 6125 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |
| 6126 | Tyler Enterprises Inc | Bristow, OK 74010-3192 | Oil & Gas Operator | Feb 2004 |
| 6127 | Tyler, Scott A | | Oil & Gas Operator | Jun 2025 |
| 6128 | Tyler, Steven Lee | | Oil Operator | May 2014 |
| 6129 | Tyson Gary | Hobart, OK 73651-6413 | Oil & Gas Operator | Mar 2018 |
| 6130 | Tyson Olan | Hobart, OK 73651-6413 | Oil & Gas Operator | Apr 2015 |
| 6131 | Tytan Operating Company LLC | Edmond, OK 73083-3794 | Oil & Gas Operator | May 2016 |
| 6132 | U S Drilling Company Inc | Holdenville, OK 74848-0913 | Oil & Gas Operator | Mar 2017 |
| 6133 | U. S. Energy Development Corporation | Fort Worth, TX 76164 | Oil & Gas Operator | Oct 2025 |
| 6134 | U.S. Oil Reclaimers, LLC | | Oil Operator | Jun 2023 |
| 6135 | Ultramar Oil & Gas LTD | Houston, TX 77060 | Oil & Gas Operator | Jul 1995 |
| 6136 | Umberham Oil Company Inc | Oklahoma City, OK 73151-4000 | Oil & Gas Operator | Jun 2025 |
| 6137 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 6138 | Unbridled Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 6139 | Underwood Oil And Gas LLC | Chandler, OK 74834-1414 | Oil & Gas Operator | Jun 2025 |
| 6140 | Unicon Producing Company | Houston, TX 75252 | Gas Operator | Mar 1994 |
| 6141 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 6142 | Union Texas Petroleum Corp. | Houston, TX 77252-2120 | Oil & Gas Operator | Dec 2014 |
| 6143 | Union Valley Petroleum Corporation | Enid, OK 73701 | Oil & Gas Operator | Jul 2025 |
| 6144 | Unit Drilling & Exploration Co | Tulsa, OK 74132-5300 | Oil & Gas Operator | Apr 2025 |
| 6145 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Oct 2025 |
| 6146 | United Energy & Expl Inc | Ada, OK 74821-2449 | Oil & Gas Operator | Jun 2025 |
| 6147 | United Energy & Exploration LLC | Ada, OK 74821 | Oil & Gas Operator | Jun 2025 |
| 6148 | United Energy Develop Co LTD | Bartlesville, OK 74003 | Oil Operator | Mar 2004 |
| 6149 | United Energy Operating, LLC | Edmond, OK 73083 | Oil & Gas Operator | Oct 2025 |
| 6150 | United Oil Corporation | Denver, CO 80202-3813 | Oil & Gas Operator | Jun 2025 |
| 6151 | United Primary Resources Inc | Milton, WA 98354-9361 | Oil & Gas Operator | Feb 2016 |
| 6152 | United Producers Inc | Broken Arrow, OK 74012-8247 | Oil & Gas Operator | Mar 2020 |
| 6153 | United Production Company LLC | Edmond, OK 73003 | Oil & Gas Operator | Jul 2025 |
| 6154 | United States Gypsum Co | Oakfield, NY 14125 | Oil & Gas Operator | Dec 2024 |
| 6155 | United Texas Petroleum Inc. | McKinney, TX 75070 | Oil & Gas Operator | Oct 2025 |
| 6156 | Universal Drilling Co., Inc. | Denver, CO 80203 | Oil & Gas Operator | Sep 2003 |
| 6157 | Universal Exploration Inc | Wadsworth, OH 44281-9460 | Oil & Gas Operator | Feb 2012 |
| 6158 | Universal Fuels Company | | Oil & Gas Operator | Oct 1993 |
| 6159 | Upland Operating, LLC | Dallas, TX 75226 | Oil & Gas Operator | Oct 2025 |
| 6160 | Upland Production Company | Edmond, OK 73083 | Oil & Gas Operator | Oct 2025 |
| 6161 | Upland Resources, Inc. | Canadian, TX 79014 | Oil & Gas Operator | Dec 2009 |
| 6162 | Uplands Resources Inc | Tulsa, OK 74103-4141 | Oil & Gas Operator | Jun 2025 |
| 6163 | Uptex Operating, L.P. | Dallas, TX 75201 | Oil & Gas Operator | May 2010 |
| 6164 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Oct 2025 |
| 6165 | Usedc Okc LLC | Getzville, NY 14068-1296 | Oil & Gas Operator | May 2018 |
| 6166 | V S Oil Company | Burkburnett, TX 76354 | Oil & Gas Operator | Oct 2025 |
| 6167 | Vab Inc | Weleetka, OK 74880 | Oil & Gas Operator | Jan 2007 |
| 6168 | Vaca Operating Company LLC | Pacific PLSDS, CA 90272 | Oil & Gas Operator | Aug 2017 |
| 6169 | Vaco Oil Company | Cleveland, OK 74020 | Oil & Gas Operator | Jun 2003 |
| 6170 | Valancy Operating LLC | Goldsby, OK 73093 | Oil & Gas Operator | Jul 2025 |
| 6171 | Valar Petroleum Inc | Houston, TX 77069 | Oil & Gas Operator | May 2006 |
| 6172 | Valence Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Oct 2025 |
| 6173 | Valiant Oil & Inv Co | | Oil & Gas Operator | Jun 2025 |
| 6174 | Validus Energy II Midcon LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2025 |
| 6175 | Validus Inc | Fort Lauderdale, FL 33304 | Oil & Gas Operator | Jun 2025 |
| 6176 | Valjohn Energy Corporation | Dover, OK 73734 | Oil & Gas Operator | Jul 2025 |
| 6177 | Valley Oil & Gas Inc | | Oil & Gas Operator | Nov 2013 |
| 6178 | Valley Petrol Consulting Inc | Denton, TX 76205 | Oil Operator | Jun 2025 |
| 6179 | Valpoint Operating, LLC | Amarillo, TX 79101 | Oil & Gas Operator | Oct 2025 |
| 6180 | Van Dall, Don | | Oil Operator | Mar 2015 |
| 6181 | Van Horn I H | Tulsa, OK 74145-5715 | Oil & Gas Operator | Mar 2001 |
| 6182 | Van Horn Oil & Gas Inc | Tulsa, OK 74170 | Oil & Gas Operator | Nov 1998 |
| 6183 | Van Horn Oil Company | Ada, OK 74820 | Oil & Gas Operator | Oct 1999 |
| 6184 | Van Orsdol Paul | Bristow, OK 74010 | Oil & Gas Operator | Mar 2025 |
| 6185 | Van Zandt Marilyn | Depew, OK 74028 | Gas Operator | Jun 2025 |
| 6186 | Vancol Oil Co Inc | Ponca City, OK 74602-0030 | Oil & Gas Operator | May 2018 |
| 6187 | Vanderbilt Resources Corp | Midland, TX 79701 | Oil & Gas Operator | Nov 1991 |
| 6188 | Vanguard Permian LLC | Houston, TX 77057 | Oil & Gas Operator | Nov 2018 |
| 6189 | Vanon Energy Inc | Fort Worth, TX 76162 | Oil & Gas Operator | Jul 2022 |
| 6190 | Vantage Point Operating Co | Houston, TX 77057 | Oil & Gas Operator | Dec 2014 |
| 6191 | Vaquero Resources, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2025 |
| 6192 | Varner Jerry D And Helen Revocable Inter VIvos Trust | Bristow, OK 74010 | Oil Operator | Jun 2025 |
| 6193 | Vassaur Elizabeth | Morris, OK 74445-2303 | Oil & Gas Operator | Oct 2018 |
| 6194 | Vastar Resources Inc | Houston, TX 77253 | Oil & Gas Operator | Jun 2025 |
| 6195 | Vaughan III Ben F | Austin, TX 78768-2233 | Oil & Gas Operator | Jun 2025 |
| 6196 | Vaughan Otto M | | Oil & Gas Operator | Apr 2014 |
| 6197 | Vaughan Production Company, Inc. | Norman, OK 73072 | Oil & Gas Operator | Sep 2014 |
| 6198 | Vaughn Deloy | Beggs, OK 74421-0305 | Oil & Gas Operator | Apr 2020 |
| 6199 | VD Oil Company LLC | Bartlesville, OK 74003-4280 | Oil Operator | Jun 2025 |
| 6200 | Vector Energy Corporation | Houston, TX 77060 | Oil & Gas Operator | Oct 2025 |