| 4201 | Speedy Well Service | | Oil & Gas Operator | Aug 2025 |
| 4202 | Spess Oil Company, A General Partnership | Cleveland, OK 74020 | Oil & Gas Operator | Sep 2025 |
| 4203 | Spikes Gas & Oil | | Gas Operator | Mar 1994 |
| 4204 | Spikes, Gary E. | Garden City, KS 67846 | Gas Operator | Mar 2013 |
| 4205 | Spindletop Oil & | | Oil Operator | Jun 1993 |
| 4206 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Feb 2026 |
| 4207 | Spines Explorati | | Oil & Gas Operator | Dec 1990 |
| 4208 | Spiral Energy Corp. | Midland, TX 79705 | Oil & Gas Operator | Dec 2019 |
| 4209 | Spivey, William | Hays, KS 67601 | Oil Operator | Jun 1993 |
| 4210 | Splechter, Tim | Yates Center, KS 66783 | Oil Operator | Sep 2025 |
| 4211 | Spradco, Inc. | Towanda, KS 67144 | Oil Operator | Sep 2025 |
| 4212 | Spring Creek Farm And Oil, LLC | Bixby, OK 74008 | Oil Operator | Jun 2025 |
| 4213 | Spring, Harry A. | Ardmore, OK 73401 | Oil Operator | Jul 2012 |
| 4214 | Springer Benjami | | Gas Operator | Aug 1990 |
| 4215 | Springer, Lee A. | Independence, KS 67301 | Oil Operator | May 2014 |
| 4216 | SPS, Inc. | Cheney, KS 67025 | Oil & Gas Operator | Sep 2025 |
| 4217 | Sram Oil Incorporated | Winfield, KS 67156 | Oil & Gas Operator | Aug 2005 |
| 4218 | Ssouri Oil Ventures | | Oil Operator | Jan 2022 |
| 4219 | St Johns Operating #1 LP | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 4220 | St Petroleum, Inc. | Edgerton, KS 66021 | Oil Operator | Sep 2025 |
| 4221 | Staab Energy & Leasing | | Oil Operator | Sep 2025 |
| 4222 | Staab Oil Co., A General Partnership | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 4223 | Stack Production | Dewey, OK 74029 | Oil & Gas Operator | Mar 2002 |
| 4224 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 4225 | Stalcup Oil Comp | | Oil Operator | Dec 1992 |
| 4226 | Stalcup Oil Company | | Oil Operator | Oct 2009 |
| 4227 | Stallings Eugene | | Oil Operator | Jul 1994 |
| 4228 | Stallion Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2017 |
| 4229 | Standard Operating Company | Wichita, KS 67205 | Oil & Gas Operator | Dec 2019 |
| 4230 | Standlee, Jacci L | Ellinwood, KS 67526 | Oil Operator | Aug 2025 |
| 4231 | Stanlee Oil LLC | | Oil Operator | Sep 2025 |
| 4232 | Star Oil Company | Wichita, KS 67230 | Oil & Gas Operator | Mar 2025 |
| 4233 | Star Resources, LTD. | Wichita, KS 67202 | Oil Operator | Nov 2002 |
| 4234 | Stauffer Oil & G | | Oil Operator | Jun 1987 |
| 4235 | Stauter, Richard J. | Greeley, CO 80634 | Gas Operator | Apr 1996 |
| 4236 | Stebeth Gas Production, Inc. | Beaumont, KS 67012 | Oil Operator | May 1996 |
| 4237 | Steckel Oil, LLC | Russell, KS 67665 | Oil Operator | Sep 2025 |
| 4238 | Stecklein Oil Co | | Oil Operator | Jul 1993 |
| 4239 | Stecklein Oil Company, A General Partnership | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 4240 | Steffen Resource Development, LLC | Hutchinson, KS 67502 | Oil & Gas Operator | Sep 2025 |
| 4241 | Steinberger Bros., Inc. | Independence, KS 67301 | Oil Operator | Dec 2009 |
| 4242 | Steinberger Oil Company | Independence, KS 67301 | Oil & Gas Operator | May 2002 |
| 4243 | Steiner Oil And Gas | Lincolnville, KS 66858 | Oil Operator | Jan 1999 |
| 4244 | Steinforth, Loren | Yates Center, KS 66783 | Oil Operator | Sep 2014 |
| 4245 | Steinle Oil | | Oil Operator | Aug 2021 |
| 4246 | Stekoll Petroleu | | Oil Operator | Oct 1985 |
| 4247 | Stelbar Oil Corp | Wichita, KS 67206 | Oil & Gas Operator | Aug 1995 |
| 4248 | Stelbar Oil Corporation, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 4249 | Stepco Incorpora | | Oil Operator | Nov 1994 |
| 4250 | Stepco Oil, Inc. | Ellinwood, KS 67526 | Oil Operator | Jan 2020 |
| 4251 | Stepco, Inc. | Ellinwood, KS 67526 | Oil Operator | Feb 2005 |
| 4252 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2026 |
| 4253 | Stephens Oil Co. | | Oil Operator | Dec 2017 |
| 4254 | Stephenson John | | Oil Operator | Dec 1985 |
| 4255 | Stephenson L G & | | Oil Operator | Apr 1987 |
| 4256 | Sterling Drillin | | Oil & Gas Operator | Mar 1992 |
| 4257 | Sterling Drilling Company | Pratt, KS 67124 | Oil & Gas Operator | Apr 2014 |
| 4258 | Sterling Explora | | Oil & Gas Operator | Jun 1994 |
| 4259 | Sterling Exploration | Lee'S Summit, MO 64082 | Gas Operator | Nov 1997 |
| 4260 | Sterling Oil & G | | Oil Operator | May 1984 |
| 4261 | Sterling Oil Co. | Sterling, KS 67579 | Oil Operator | Feb 2000 |
| 4262 | Sterling Petrole | | Oil & Gas Operator | Sep 1992 |
| 4263 | Steve'S Oilfield | | Oil Operator | Jul 1994 |
| 4264 | Stewart Oil Co. | | Oil Operator | Jun 2009 |
| 4265 | Stewart Oil Comp | | Oil Operator | Jul 1993 |
| 4266 | Stewart Petroleum Corporation | Greenwood VIllage, CO 80111 | Oil & Gas Operator | Dec 2023 |
| 4267 | Stewart Producers, Inc. | Mount Vernon, IL 62864 | Oil & Gas Operator | Sep 2025 |
| 4268 | Stewart W C Oil | | Oil Operator | Jun 1986 |
| 4269 | Stewart, William C. | Amarillo, TX 79105 | Gas Operator | May 2003 |
| 4270 | Stice Oil Company | | Oil Operator | Jul 2025 |
| 4271 | Stich Oil Company, A General Partnership | Chanute, KS 66720 | Oil Operator | Jul 2014 |
| 4272 | Stifter, Ralph E | Rantoul, KS 66079 | Oil Operator | Sep 2001 |
| 4273 | Stixon Petroleum | | Oil Operator | Dec 1996 |
| 4274 | STL Oil & Gas LLC | Skiatook, OK 74070 | Oil & Gas Operator | Mar 2016 |
| 4275 | Stoeppelwerth DR | | Oil Operator | May 1993 |
| 4276 | Stone Oak Operating LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Nov 2025 |
| 4277 | Stone Oil Compan | | Oil Operator | Jan 1990 |
| 4278 | Stone, D J | Palo Alto, CA 94301 | Oil & Gas Operator | Sep 1985 |
| 4279 | Stonegate Ranch LLC | Caney, KS 67333 | Oil Operator | Sep 2025 |
| 4280 | Stoskopf, Wayne | Hoisington, KS 67544 | Oil Operator | Apr 1995 |
| 4281 | Stotts-Kirkpatri | | Oil Operator | Oct 1991 |
| 4282 | Stoudt, Jean Marie | Broken Arrow, OK 74011 | Oil Operator | May 2025 |
| 4283 | STP Cherokee Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2014 |
| 4284 | Strabala Joseph | | Oil Operator | Jan 1992 |
| 4285 | Strait F W Incor | | Oil Operator | Jan 1992 |
| 4286 | Strat Land Exploration Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2025 |
| 4287 | Strata Energy Re | | Oil Operator | Nov 1987 |
| 4288 | Strata Exploration, Inc. | Fairfield, IL 62837 | Oil & Gas Operator | Sep 2025 |
| 4289 | Strata Oil Incor | | Oil Operator | Mar 1994 |
| 4290 | Stratakan Exploration, LLC | Plainville, KS 67663 | Oil & Gas Operator | Sep 2025 |
| 4291 | Stratex Oil & Gas Holdings, Inc. | Watertown, CT 06795 | Oil Operator | Jun 2015 |
| 4292 | Streamline Energy, LLC | Yates Center, KS 66783 | Oil & Gas Operator | Dec 2019 |
| 4293 | Striker Petroleum Corporation | Englewood, CO 80111 | Oil & Gas Operator | Dec 1999 |
| 4294 | Stripper Oil Com | | Oil Operator | Nov 1996 |
| 4295 | Stripper Oil Company Inc | | Oil Operator | Sep 2025 |
| 4296 | Stroke Of Luck Energy & Exploration LLC | Cassoday, KS 66842 | Oil Operator | Sep 2021 |
| 4297 | Stromquist C Dal | | Oil & Gas Operator | Aug 1991 |
| 4298 | Stromquist, C. Dale, A General Partnership | Liberal, KS 67901 | Oil & Gas Operator | Aug 2010 |
| 4299 | Stroud Oil Properties, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | May 2013 |
| 4300 | Stubbs & Fleming, A General Partnership | Wichita, KS 67202 | Oil Operator | Jul 2005 |