| 201 | Tonys Crude Oil Reclaiming Plant Inc | | Oil Operator | Jan 2024 |
| 202 | Total Petroleum Inc | Denver, CO 80201-0500 | Oil & Gas Operator | Nov 2006 |
| 203 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Feb 2024 |
| 204 | Trio Consulting & MGMT LLC | Wichita Falls, TX 76307-0209 | Oil Operator | Feb 2024 |
| 205 | Trio Operating Company, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2006 |
| 206 | Triple C Properties Inc | Seminole, OK 74818-0481 | Oil & Gas Operator | Jun 2023 |
| 207 | Triple G Well Service, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2024 |
| 208 | Triple S Drilling Company | Leonard, OK 74043 | Oil & Gas Operator | Feb 2012 |
| 209 | Tripledee Drilling Co Inc | Ardmore, OK 73402-1888 | Oil & Gas Operator | Dec 2015 |
| 210 | Trout Disposal Well Inc | Hammon, OK 73650-0292 | Oil & Gas Operator | Jul 2016 |
| 211 | Truluck Enterprises LLC | Wichita Falls, TX 76308-4454 | Oil & Gas Operator | Apr 2015 |
| 212 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 213 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2024 |
| 214 | Vitol Inc | Houston, TX 77098 | Oil & Gas Operator | Sep 2023 |
| 215 | W S Crude Oil Purchasing Inc | Oklahoma City, OK 73129-7613 | Oil & Gas Operator | May 2008 |
| 216 | Walker Keith F | Ardmore, OK 73401 | Oil & Gas Operator | Jan 2019 |
| 217 | West Bay Exploration Company | Muenster, TX 76252 | Oil & Gas Operator | Feb 2024 |
| 218 | Western Oil And Gas Development Corp | Oklahoma City, OK 73103-3735 | Oil & Gas Operator | Feb 2024 |
| 219 | WFD Oil Corporation | Edmond, OK 73012-0619 | Oil & Gas Operator | Feb 2024 |
| 220 | WFW Production Company, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2024 |
| 221 | Whitco Operating Company | Duncan, OK 73534-1936 | Oil & Gas Operator | Oct 2009 |
| 222 | Wible Limited Liability Co | Oklahoma City, OK 73116-7326 | Oil Operator | Jan 2024 |
| 223 | Wilcoxson Brothers | Terral, OK 73569 | Oil Operator | Mar 2008 |
| 224 | Wildhorse Operating Company | Ardmore, OK 73402 | Oil & Gas Operator | Apr 2024 |
| 225 | Williams Reid Oil Co | Dallas, TX 75234 | Oil & Gas Operator | Jan 2024 |
| 226 | Williford Energy Company | Tulsa, OK 74135 | Oil & Gas Operator | Apr 2024 |
| 227 | Williford Resources LLC | Tulsa, OK 74136-1020 | Oil & Gas Operator | Feb 2024 |
| 228 | Wilson Charles R | Durant, OK 74701-4910 | Oil Operator | May 2023 |
| 229 | Wilson Claude And Ila | Loco, OK 73442-9404 | Oil & Gas Operator | Feb 2024 |
| 230 | Wilson Well Service | Loco, OK 73442-0114 | Oil & Gas Operator | Mar 2018 |
| 231 | Windward Development LLC | Tulsa, OK 74136-7007 | Oil & Gas Operator | Jul 2019 |
| 232 | Wonee Oil Company | Healdton, OK 73438 | Oil Operator | Jul 1996 |
| 233 | Woodward Iodine Corporation | Woodward, OK 73802-1245 | Oil & Gas Operator | Feb 2024 |
| 234 | Zimet Brothers Inc | | Oil Operator | Mar 2008 |