| 4201 | Sujen Enterprise | | Oil Operator | Sep 1989 |
| 4202 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 4203 | Sullivan And Company LLC | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2025 |
| 4204 | Summer Sun Gas, Inc. | Sedan, KS 67361 | Oil & Gas Operator | Dec 2014 |
| 4205 | Summit Operating LLC | Boulder, CO 80301 | Oil & Gas Operator | Feb 2025 |
| 4206 | Summitt Energy, LLC | Wichita, KS 67218 | Oil Operator | Dec 2024 |
| 4207 | Sun Oil Company | Arlington, TX 76006 | Oil & Gas Operator | Dec 2021 |
| 4208 | Sun Ventures | Bartlesville, OK 74003 | Oil Operator | Feb 1997 |
| 4209 | Sunardo Energy, Inc. | Castle Rock, CO 80104 | Oil Operator | Jan 1997 |
| 4210 | Sunburst Explora | | Oil Operator | May 1990 |
| 4211 | Sundance Oil & Gas, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Mar 2012 |
| 4212 | Sundance Oil, Inc. | Norfolk, NE 68702 | Oil Operator | Aug 1998 |
| 4213 | Sundgren, Stephen E. And Jackie | Rosalia, KS 67132 | Oil Operator | Jun 2023 |
| 4214 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Dec 2024 |
| 4215 | Sunfire Energy | | Oil & Gas Operator | Dec 2024 |
| 4216 | Sunflower Energy, LLC | Overland Park, KS 66210 | Oil Operator | Dec 2019 |
| 4217 | Sunflower Exploration, LLC | Overland Park, KS 66210 | Gas Operator | Dec 2024 |
| 4218 | Sunflower Well Service, Inc. | Canton, KS 67428 | Oil & Gas Operator | Nov 2024 |
| 4219 | Sunny Day Resour | | Oil Operator | Dec 1987 |
| 4220 | Sunoco Partners Marketing | | Oil Operator | Apr 2023 |
| 4221 | Sunrise Oil Corp | | Oil Operator | Mar 1992 |
| 4222 | Sunwest Explorat | | Oil & Gas Operator | Nov 1985 |
| 4223 | Super Oilwell Service | Russell, KS 67665 | Oil Operator | Oct 2024 |
| 4224 | Superior Oil Com | | Oil & Gas Operator | Dec 1994 |
| 4225 | Superior Oilfield Services LLC | Wichita, KS 67218 | Oil Operator | Dec 2024 |
| 4226 | Supernova Energy, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Nov 2019 |
| 4227 | Supra Energy, Inc. | Tulsa, OK 74137 | Oil & Gas Operator | May 1997 |
| 4228 | Sutton Investmen | | Oil Operator | Mar 1987 |
| 4229 | SW Gas Stge | | Gas Operator | Oct 2015 |
| 4230 | Swander, Everett | Cunningham, KS 67035 | Oil Operator | May 1998 |
| 4231 | Swenco-Western I | | Oil Operator | Sep 1987 |
| 4232 | Swenton, Michael J. | Tulsa, OK 74105 | Oil & Gas Operator | Jan 2025 |
| 4233 | Swift Energy Com | | Oil & Gas Operator | Sep 1995 |
| 4234 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 4235 | SX54, LLC | Sheridan, WY 82801 | Oil Operator | Nov 2017 |
| 4236 | T & C MFG. & Operating, Inc. | Great Bend, KS 67530 | Oil Operator | May 2022 |
| 4237 | T & C Oil, Inc. | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2024 |
| 4238 | T & D Oil Co. | Victoria, KS 67671 | Oil Operator | Apr 1996 |
| 4239 | T & D Oil Compan | | Oil Operator | Jan 1992 |
| 4240 | T & L Production | | Oil Operator | May 1987 |
| 4241 | T & P Oil & Gas, L.L.C. | Overland Park, KS 66212 | Oil Operator | Dec 2009 |
| 4242 | T & R Oil | Mapleton, KS 66754 | Oil & Gas Operator | May 2018 |
| 4243 | T & R Oil Company, A General Partnership | Moline, KS 67353 | Oil Operator | Dec 2019 |
| 4244 | T & W Ward Oil LLC | Blackwell, OK 74631 | Oil Operator | Jan 2025 |
| 4245 | T C Production | | Oil Operator | May 1994 |
| 4246 | T J D Oil Compan | | Oil Operator | Feb 1989 |
| 4247 | T-Bar Exploration, Inc. | Sterling, KS 67579 | Oil Operator | Apr 1998 |
| 4248 | T-N-T Engineering, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2025 |
| 4249 | T-Y Development Corp | Perryton, TX 79070 | Oil & Gas Operator | Apr 2025 |
| 4250 | T. T. Production, Inc. | Haviland, KS 67059 | Oil & Gas Operator | Feb 2008 |
| 4251 | T.C.G. Oil Co. | Iola, KS 66749 | Oil Operator | Sep 2009 |
| 4252 | T.C.G. Oil Co., A General Partnership | Laharpe, KS 66755 | Oil Operator | Aug 2009 |
| 4253 | T.J. Oil | | Oil Operator | Oct 2024 |
| 4254 | Taft Oil And Gas LLC | Bonham, TX 75418 | Oil & Gas Operator | Dec 2018 |
| 4255 | Tailwater, Inc. | Oklahoma City, OK 73154 | Oil Operator | Aug 2024 |
| 4256 | Talley Resources | | Oil Operator | Jun 1994 |
| 4257 | Tallgrass Explor | | Oil Operator | Sep 1987 |
| 4258 | Talon Group LLC | Hays, KS 67601 | Oil Operator | Dec 2024 |
| 4259 | Tamoil | | Oil Operator | May 2017 |
| 4260 | Tanner, M.B. | Moline, KS 67353 | Oil Operator | Apr 1986 |
| 4261 | Taos Resources Operating Co LLC | Houston, TX 77037 | Oil & Gas Operator | Dec 2019 |
| 4262 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2025 |
| 4263 | Targa Pipeline Mid-Continent Westok LLC | Sulphur, LA 70665 | Gas Operator | Dec 2024 |
| 4264 | Tate Exploration | Lakin, KS 67860 | Oil & Gas Operator | Sep 1994 |
| 4265 | Taurus Oil Compa | | Oil Operator | Oct 1994 |
| 4266 | Tauy Oil, Inc | Baldwin City, KS 66006 | Oil Operator | Dec 2024 |
| 4267 | Taylor Explorati | | Oil & Gas Operator | Jun 1985 |
| 4268 | Taylor Florence | | Oil Operator | Mar 1995 |
| 4269 | Taylor Oil Co. | Edmond, OK 73034 | Oil & Gas Operator | Dec 2024 |
| 4270 | Taylor-Brown Ope | | Oil Operator | Sep 1988 |
| 4271 | Taylor-Cranor Oi | | Oil Operator | Dec 1987 |
| 4272 | Tdi, Inc. | Hays, KS 67601 | Oil Operator | Dec 2024 |
| 4273 | Tdot Oil, Inc. | Sedan, KS 67361 | Oil Operator | Dec 2024 |
| 4274 | TDR Construction, Inc. | Wellsville, KS 66092 | Oil Operator | Dec 2024 |
| 4275 | Te-Pe Oil & Gas | | Oil & Gas Operator | Dec 2024 |
| 4276 | Te-Ray Energy, Inc. | Oklahoma City, OK 73108 | Oil & Gas Operator | Jan 2025 |
| 4277 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2025 |
| 4278 | Tec Drilling Com | | Oil Operator | Feb 1982 |
| 4279 | Tec Resources, L.L.C. | Tulsa, OK 74128 | Oil & Gas Operator | May 2013 |
| 4280 | Tech American Re | | Oil Operator | Sep 1985 |
| 4281 | Teg Midcontinent, Inc. | Aurora, CO 80014 | Oil Operator | Jul 2013 |
| 4282 | Tehi Illinois, LLC | Olney, IL 62450 | Oil & Gas Operator | Feb 2019 |
| 4283 | Teichgraeber Oil | | Oil Operator | Nov 1995 |
| 4284 | Teichgraeber Oil Co. | | Oil Operator | Dec 1994 |
| 4285 | Teichgraeber Oil, Inc. | Eureka, KS 67045 | Oil & Gas Operator | Dec 2024 |
| 4286 | Tekenergy, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 4287 | Teko Oil & Gas I | | Oil Operator | Aug 1992 |
| 4288 | Tema Oil And Gas, LLC | Houston, TX 77040 | Oil & Gas Operator | Apr 2000 |
| 4289 | Tema Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Jun 2009 |
| 4290 | Tenex Oil Corpor | | Oil Operator | May 1991 |
| 4291 | Tengasco, Inc. | Houston, TX 77063 | Oil & Gas Operator | Apr 2024 |
| 4292 | Tenison Oil Comp | | Oil Operator | Jan 1993 |
| 4293 | Tenk, Lawrence O. | Ottawa, KS 66067 | Oil & Gas Operator | Oct 1998 |
| 4294 | Tenneco Oil Comp | | Oil & Gas Operator | Aug 1995 |
| 4295 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Dec 2024 |
| 4296 | Terra Max Energy | | Oil Operator | Mar 1986 |
| 4297 | Terra Resc Incor | | Oil Operator | Mar 1986 |
| 4298 | Terrol Energy In | | Oil Operator | Feb 1993 |
| 4299 | Terrol Energy, Inc. | Hygiene, CO 80533 | Oil & Gas Operator | Dec 2006 |
| 4300 | Tesoro Petroleum | | Oil Operator | Mar 1982 |