| 4201 | Tri-J Tubulars, Inc. | Wichita, KS 67202 | Oil Operator | Aug 1996 |
| 4202 | Tri-L Oil Co. | | Oil Operator | Sep 2015 |
| 4203 | Trich Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2024 |
| 4204 | Trigg Exploratio | | Gas Operator | Feb 1992 |
| 4205 | Trimble & Maclaskey Oil LLC | Gridley, KS 66852 | Oil Operator | Dec 2023 |
| 4206 | Trimble, IVal L. | Gridley, KS 66852 | Oil Operator | Dec 2019 |
| 4207 | Trinity Bay Oil & Gas, Inc. | Lubbock, TX 79416 | Oil & Gas Operator | Apr 2024 |
| 4208 | Trinity Resources, Inc. | Houston, TX 77277 | Oil & Gas Operator | May 2020 |
| 4209 | Triple "S" Well Service, Inc. | Eureka, KS 67045 | Oil Operator | Dec 2023 |
| 4210 | Triple 'H' Oil O | | Oil Operator | Apr 1992 |
| 4211 | Triple B Crude, LLC | Colony, KS 66015 | Oil Operator | Dec 2023 |
| 4212 | Triple C Petroleum LLC | Colony, KS 66015 | Oil Operator | Nov 2019 |
| 4213 | Triple Crown Operating LLC | Tulsa, OK 74114 | Oil Operator | Dec 2023 |
| 4214 | Triple E Drillin | | Oil Operator | Jun 1992 |
| 4215 | Triple E Oil | Sterling, KS 67579 | Oil & Gas Operator | Mar 1999 |
| 4216 | Triple J L.L.C. | Coffeyville, KS 67336 | Oil Operator | Mar 1999 |
| 4217 | Triple J Prod In | | Oil Operator | Sep 1989 |
| 4218 | Triple K | | Oil Operator | Jun 2007 |
| 4219 | Triple S Construction | Blue Mound, KS 66010 | Gas Operator | Dec 2023 |
| 4220 | Triple S Well Se | | Oil Operator | Dec 1996 |
| 4221 | Triple Seven, Inc. | Oklahoma City, OK 73132 | Oil & Gas Operator | Nov 1997 |
| 4222 | Triple T Oil, LLC | Louisburg, KS 66053 | Oil Operator | Nov 2023 |
| 4223 | Triple T Pipelines, Inc. | Frontenac, KS 66763 | Oil & Gas Operator | Sep 2023 |
| 4224 | Triple T Resources, LP | Dallas, TX 75205 | Oil & Gas Operator | Dec 2023 |
| 4225 | Tripower Resources LLC | Ardmore, OK 73402 | Oil & Gas Operator | Apr 2024 |
| 4226 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 4227 | Tritex Resc Inco | | Oil Operator | Dec 1985 |
| 4228 | Triton Oil & Gas Corp. | Houston, TX 77002 | Oil & Gas Operator | Nov 2014 |
| 4229 | Triunited Investors, LLC | Monte Sereno, CA 95030 | Oil Operator | May 2012 |
| 4230 | Troy Jaco, Inc. | Sherman, TX 75091 | Oil Operator | Dec 2018 |
| 4231 | Troy Resources C | | Oil Operator | Jun 1990 |
| 4232 | Troyer, Wayne A. | Galva, KS 67443 | Oil Operator | Jun 1997 |
| 4233 | True Oil Company | Casper, WY 82602 | Oil & Gas Operator | Aug 2003 |
| 4234 | Trumart Oil Comp | | Oil Operator | May 1990 |
| 4235 | Trumart Oil Company | Ellis, KS 67637 | Oil Operator | Dec 2000 |
| 4236 | Tubbs Patrick | Neodesha, KS 66757 | Oil Operator | Sep 2008 |
| 4237 | Tucker, Carl H., Jr. | Independence, KS 67301 | Oil Operator | Jul 1996 |
| 4238 | Tucker, Stephen A. | Independence, KS 67301 | Oil Operator | Feb 2009 |
| 4239 | Turnco Drilling, Inc. | Portland, OR 97208 | Oil & Gas Operator | Dec 2009 |
| 4240 | Tutcher, Dan C. | Houston, TX 77002 | Oil Operator | Dec 2004 |
| 4241 | Tuthill & Barbee | Amarillo, TX 79101 | Oil & Gas Operator | Nov 1994 |
| 4242 | Twin Eagle Petro | | Oil Operator | Aug 1990 |
| 4243 | Twin M, Inc. | Kingman, KS 67068 | Oil & Gas Operator | Dec 2023 |
| 4244 | Twin Star Petrol | | Oil & Gas Operator | Jan 1989 |
| 4245 | Twinoco | Caney, KS 67333 | Oil Operator | Nov 1996 |
| 4246 | Twisted Oak Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2024 |
| 4247 | TWM Production Co., A General Partnership | Chanute, KS 66720 | Oil Operator | Dec 2023 |
| 4248 | Tyco Incorporate | | Oil & Gas Operator | Oct 1995 |
| 4249 | Tyco Oil Co. | | Oil Operator | Oct 2023 |
| 4250 | Tyluka Operations, LLC | Hays, KS 67601 | Oil Operator | Nov 2023 |
| 4251 | Tyro Oil Develop | | Oil Operator | Jul 1991 |
| 4252 | Tyrok | | Oil & Gas Operator | Nov 2010 |
| 4253 | U-N-I Exploration & Development, Inc. | Yates Center, KS 66783 | Oil & Gas Operator | Jan 2003 |
| 4254 | Uhls, Jimmie J. | Sedan, KS 67361 | Oil Operator | Sep 2019 |
| 4255 | Ulysses, City Of | Ulysses, KS 67880 | Gas Operator | Dec 2023 |
| 4256 | Ummel'S Tank Ser | | Oil Operator | Sep 1994 |
| 4257 | Union Pacific Re | | Oil & Gas Operator | Dec 1996 |
| 4258 | Union Pacific Resour | | Oil & Gas Operator | Apr 2002 |
| 4259 | Union Texas Petroleum | Houston, TX 77252 | Oil & Gas Operator | Oct 1991 |
| 4260 | Union Valley Petroleum Corporation | Enid, OK 73701 | Oil & Gas Operator | Feb 2024 |
| 4261 | Unionville Explo | | Oil Operator | Jul 1984 |
| 4262 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2024 |
| 4263 | United Energy & Exploration LLC | Ada, OK 74821 | Oil & Gas Operator | Jan 2024 |
| 4264 | United Energy Inc. | Wichita, KS 67230 | Oil & Gas Operator | Dec 2002 |
| 4265 | United Meridian | | Oil Operator | Dec 1992 |
| 4266 | United Oil & Gas | | Oil Operator | Feb 1988 |
| 4267 | United Petroleum | | Oil Operator | Mar 1986 |
| 4268 | United Petroleum Corporation | Edgwater, CO 80214 | Oil & Gas Operator | May 1996 |
| 4269 | United Reserve G | | Oil Operator | Aug 1987 |
| 4270 | United States Exploration, Inc. | Denver, CO 80802 | Oil & Gas Operator | Jun 2009 |
| 4271 | Universal Resour | | Oil & Gas Operator | Dec 1996 |
| 4272 | Universal Resources Corp. | Salt Lake Cty, UT 84145 | Oil & Gas Operator | Jan 2000 |
| 4273 | Unknown | Houston, TX 77208 | Oil & Gas Operator | Dec 2022 |
| 4274 | Unrein Oil Co | | Oil Operator | Dec 2023 |
| 4275 | Unruh, Elmer | Galva, KS 67443 | Oil & Gas Operator | Aug 1998 |
| 4276 | Unruh, Mark D. | Peru, KS 67360 | Oil Operator | Sep 2011 |
| 4277 | Upland Resources | | Oil Operator | Jul 1983 |
| 4278 | Upland Resources, Inc. | Canadian, TX 79014 | Oil & Gas Operator | Dec 2009 |
| 4279 | Uranus, Inc. | Kansas City, MO 64112 | Oil Operator | Jan 2000 |
| 4280 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Apr 2024 |
| 4281 | Us Energy Exploration Corp | Rural Valley, PA 16249 | Oil & Gas Operator | Dec 2023 |
| 4282 | Us Oil Resources LLC | Lakewood, CO 80123 | Oil Operator | Dec 2023 |
| 4283 | Usins Oil Compan | | Oil Operator | Jan 1993 |
| 4284 | Usx Operating Co., Inc. | Barnstall, OK 74002 | Oil & Gas Operator | Apr 2017 |
| 4285 | Utah Oil LLC | Rantoul, KS 66079 | Oil Operator | Dec 2023 |
| 4286 | V & F Oil Company, A General Partnership | Hays, KS 67601 | Oil Operator | Dec 2023 |
| 4287 | V & R Oil | | Oil Operator | Dec 2023 |
| 4288 | V. Francis Weigel Family Partnership LLC | Gorham, KS 67640 | Oil Operator | Dec 2023 |
| 4289 | V. R. Oil Co. | | Oil Operator | Nov 2023 |
| 4290 | Vac Petroleum Co | | Oil Operator | Dec 1990 |
| 4291 | Vail Energy/Enma | | Oil Operator | Oct 1987 |
| 4292 | Val Energy, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Dec 2023 |
| 4293 | Vamco Operations | | Oil & Gas Operator | Dec 2023 |
| 4294 | Van Buskirk Bill | | Oil Operator | Dec 1996 |
| 4295 | Van Buskirk, Billy L. | Severy, KS 67137 | Oil Operator | Dec 2009 |
| 4296 | Van Oil, Inc | Madison, KS 66860 | Oil & Gas Operator | Dec 2023 |
| 4297 | Vanderman Oil | Neosho Falls, KS 66758 | Oil Operator | Feb 2006 |
| 4298 | Vanmax Explorati | | Oil Operator | Nov 1995 |
| 4299 | Vanon Energy Inc | Fort Worth, TX 76162 | Oil & Gas Operator | Dec 2023 |
| 4300 | Vanroyen Oil And Gas, L.L.C. | Wichita, KS 67217 | Oil Operator | Nov 2023 |