| 4301 | Stuber, VIrgil | Eureka, KS 67045 | Oil Operator | Dec 2019 |
| 4302 | Stucky Oil Compa | | Oil Operator | Mar 1988 |
| 4303 | Stucky Oil Company | Sedgwick, KS 67135 | Gas Operator | Aug 1999 |
| 4304 | Stucky, Edward P. | Sabetha, KS 66534 | Oil Operator | May 1992 |
| 4305 | Stucky, Kenneth R. Oil & Gas Operations | Burrton, KS 67020 | Oil & Gas Operator | Aug 2002 |
| 4306 | Studer Oil Co. | Pratt, KS 67124 | Oil Operator | Oct 2019 |
| 4307 | Studer Oil Compa | | Oil & Gas Operator | Feb 1993 |
| 4308 | Stull Crude Co, LLC | | Oil Operator | Sep 2025 |
| 4309 | Stull Oil LLC | Natoma, KS 67651 | Oil Operator | Sep 2025 |
| 4310 | Sublette Feeders | | Gas Operator | Oct 1996 |
| 4311 | Sublette Feeders LLC | Sublette, KS 67877 | Gas Operator | Sep 2025 |
| 4312 | Suemaur Expl. & Prod., LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jun 2024 |
| 4313 | Suerte Oil & Gas LLC | Caney, KS 67333 | Oil Operator | Sep 2025 |
| 4314 | Suerte Oil Compa | | Oil & Gas Operator | Oct 1995 |
| 4315 | Suerte Oil Company | Howard, KS 67349 | Oil & Gas Operator | Jan 2017 |
| 4316 | Sujen Enterprise | | Oil Operator | Sep 1989 |
| 4317 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 4318 | Sullivan And Company LLC | Tulsa, OK 74119 | Oil & Gas Operator | Nov 2025 |
| 4319 | Summer Sun Gas | | Gas Operator | Mar 1990 |
| 4320 | Summer Sun Gas, Inc. | Sedan, KS 67361 | Oil & Gas Operator | Dec 2014 |
| 4321 | Summit Operating LLC | Boulder, CO 80301 | Oil & Gas Operator | Nov 2025 |
| 4322 | Summitt Energy, LLC | Wichita, KS 67218 | Oil Operator | Sep 2025 |
| 4323 | Sun Oil Company | Dallas, TX 75373 | Oil & Gas Operator | Dec 2021 |
| 4324 | Sun Ventures | Bartlesville, OK 74003 | Oil Operator | Feb 1997 |
| 4325 | Sunardo Energy, Inc. | Castle Rock, CO 80104 | Oil Operator | Jan 1997 |
| 4326 | Sunburst Explora | | Oil Operator | May 1990 |
| 4327 | Sundance Oil & Gas, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Mar 2012 |
| 4328 | Sundance Oil, Inc. | Norfolk, NE 68702 | Oil Operator | Aug 1998 |
| 4329 | Sundgren, Stephen E. And Jackie | Rosalia, KS 67132 | Oil Operator | Jun 2023 |
| 4330 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 4331 | Sunfire Energy | | Oil & Gas Operator | Sep 2025 |
| 4332 | Sunflower Energy, LLC | Overland Park, KS 66210 | Oil Operator | Dec 2019 |
| 4333 | Sunflower Exploration, LLC | Overland Park, KS 66210 | Gas Operator | Sep 2025 |
| 4334 | Sunflower Well Service, Inc. | Canton, KS 67428 | Oil & Gas Operator | Aug 2025 |
| 4335 | Sunny Day Resour | | Oil Operator | Dec 1987 |
| 4336 | Sunoco Partners Marketing | | Oil Operator | Apr 2023 |
| 4337 | Sunrise Oil Corp | | Oil Operator | Mar 1992 |
| 4338 | Sunwest Explorat | | Oil & Gas Operator | Nov 1985 |
| 4339 | Super Oilwell Service | Russell, KS 67665 | Oil Operator | Sep 2025 |
| 4340 | Superior Oil Com | | Oil & Gas Operator | Dec 1994 |
| 4341 | Superior Oilfield Services LLC | Wichita, KS 67218 | Oil Operator | Sep 2025 |
| 4342 | Supernova Energy, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Nov 2019 |
| 4343 | Supra Energy, Inc. | Tulsa, OK 74137 | Oil & Gas Operator | May 1997 |
| 4344 | Sutton Investmen | | Oil Operator | Mar 1987 |
| 4345 | SW Gas Stge | | Gas Operator | Oct 2015 |
| 4346 | Swander, Everett | Cunningham, KS 67035 | Oil Operator | May 1998 |
| 4347 | Swenco-Western I | | Oil Operator | Sep 1987 |
| 4348 | Swenton Michael J | Tulsa, OK 74105 | Oil & Gas Operator | Nov 2025 |
| 4349 | Swift Energy Com | | Oil & Gas Operator | Sep 1995 |
| 4350 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 4351 | SX54, LLC | Sheridan, WY 82801 | Oil Operator | Nov 2017 |
| 4352 | T & C MFG. & Operating, Inc. | Great Bend, KS 67530 | Oil Operator | May 2022 |
| 4353 | T & C Oil, Inc. | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2024 |
| 4354 | T & D Oil Co. | Victoria, KS 67671 | Oil Operator | Apr 1996 |
| 4355 | T & D Oil Compan | | Oil Operator | Jan 1992 |
| 4356 | T & G Oil Operations LLC | | Oil Operator | Sep 2025 |
| 4357 | T & L Production | | Oil Operator | May 1987 |
| 4358 | T & P Oil & Gas, L.L.C. | Overland Park, KS 66212 | Oil Operator | Dec 2009 |
| 4359 | T & R Oil Company, A General Partnership | Moline, KS 67353 | Oil Operator | Dec 2019 |
| 4360 | T & W Ward Oil LLC | Blackwell, OK 74631 | Oil Operator | Nov 2025 |
| 4361 | T C Production | | Oil Operator | May 1994 |
| 4362 | T G T Petroleum Corporation | Wichita, KS 67275 | Oil & Gas Operator | Sep 2025 |
| 4363 | T J D Oil Compan | | Oil Operator | Feb 1989 |
| 4364 | T-Bar Exploration, Inc. | Sterling, KS 67579 | Oil Operator | Apr 1998 |
| 4365 | T-N-T Engineering, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Feb 2026 |
| 4366 | T-R Oil | Mapleton, KS 66754 | Oil & Gas Operator | May 2018 |
| 4367 | T-Y Development Corp | Perryton, TX 79070 | Oil & Gas Operator | Feb 2026 |
| 4368 | T. T. Production, Inc. | Haviland, KS 67059 | Oil & Gas Operator | Feb 2008 |
| 4369 | T.C.G. Oil Co. | Iola, KS 66749 | Oil Operator | Sep 2009 |
| 4370 | T.C.G. Oil Co., A General Partnership | Laharpe, KS 66755 | Oil Operator | Aug 2009 |
| 4371 | T.J. Oil | | Oil Operator | Sep 2025 |
| 4372 | Taft Oil And Gas LLC | Bonham, TX 75418 | Oil & Gas Operator | Dec 2018 |
| 4373 | Tailwater, Inc. | Oklahoma City, OK 73154 | Oil Operator | Aug 2024 |
| 4374 | Talley Resources | | Oil Operator | Jun 1994 |
| 4375 | Tallgrass Explor | | Oil Operator | Sep 1987 |
| 4376 | Talon Group LLC | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 4377 | Tamoil | | Oil Operator | May 2017 |
| 4378 | Tanner, M.B. | Moline, KS 67353 | Oil Operator | Apr 1986 |
| 4379 | Taos Resources Operating Co LLC | Houston, TX 77037 | Oil & Gas Operator | Dec 2019 |
| 4380 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Dec 2025 |
| 4381 | Targa Pipeline Mid-Continent Westok LLC | Sulphur, LA 70665 | Gas Operator | Sep 2025 |
| 4382 | Tasl Petroleum | Borger, TX 79007 | Oil & Gas Operator | Feb 1991 |
| 4383 | Tate Exploration | Lakin, KS 67860 | Oil & Gas Operator | Sep 1994 |
| 4384 | Taurus Oil Compa | | Oil Operator | Oct 1994 |
| 4385 | Tauy Oil, Inc | Baldwin City, KS 66006 | Oil Operator | Aug 2025 |
| 4386 | Taylor Explorati | | Oil & Gas Operator | Jun 1985 |
| 4387 | Taylor Florence | | Oil Operator | Mar 1995 |
| 4388 | Taylor Oil Company | Edmond, OK 73034 | Oil & Gas Operator | Sep 2025 |
| 4389 | Taylor-Brown Ope | | Oil Operator | Sep 1988 |
| 4390 | Taylor-Cranor Oi | | Oil Operator | Dec 1987 |
| 4391 | Tdi, Inc. | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 4392 | Tdot Oil, Inc. | Sedan, KS 67361 | Oil Operator | Sep 2025 |
| 4393 | TDR Construction, Inc. | Wellsville, KS 66092 | Oil Operator | Sep 2025 |
| 4394 | Te-Pe Oil & Gas | | Oil & Gas Operator | Sep 2025 |
| 4395 | Te-Ray Energy Inc | Oklahoma City, OK 73108 | Oil & Gas Operator | Nov 2025 |
| 4396 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Feb 2026 |
| 4397 | Tec Drilling Com | | Oil Operator | Feb 1982 |
| 4398 | Tec Resources LLC | Tulsa, OK 74128 | Oil & Gas Operator | May 2013 |
| 4399 | Tech American Re | | Oil Operator | Sep 1985 |
| 4400 | Teg Midcontinent, Inc. | Aurora, CO 80014 | Oil Operator | Jul 2013 |