| 4101 | Sterling Oil & G | | Oil Operator | May 1984 |
| 4102 | Sterling Oil Co. | Sterling, KS 67579 | Oil Operator | Feb 2000 |
| 4103 | Sterling Petrole | | Oil & Gas Operator | Sep 1992 |
| 4104 | Steve'S Oilfield | | Oil Operator | Jul 1994 |
| 4105 | Stewart Oil Comp | | Oil Operator | Jul 1993 |
| 4106 | Stewart Oil Company | | Oil Operator | Jun 2009 |
| 4107 | Stewart Petroleum Corporation | Greenwood VIllage, CO 80111 | Oil & Gas Operator | Dec 2023 |
| 4108 | Stewart Producers, Inc. | Mount Vernon, IL 62864 | Oil & Gas Operator | Mar 2025 |
| 4109 | Stewart W C Oil | | Oil Operator | Jun 1986 |
| 4110 | Stewart, William C. | Amarillo, TX 79105 | Gas Operator | May 2003 |
| 4111 | Stice Oil Company | | Oil Operator | Feb 2025 |
| 4112 | Stich Oil Company, A General Partnership | Chanute, KS 66720 | Oil Operator | Jul 2014 |
| 4113 | Stifter, Ralph E | Rantoul, KS 66079 | Oil Operator | Sep 2001 |
| 4114 | Stixon Petroleum | | Oil Operator | Dec 1996 |
| 4115 | STL Oil & Gas LLC | Skiatook, OK 74070 | Oil & Gas Operator | Mar 2016 |
| 4116 | Stoeppelwerth DR | | Oil Operator | May 1993 |
| 4117 | Stone Oak Operating LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Apr 2025 |
| 4118 | Stone Oil Compan | | Oil Operator | Jan 1990 |
| 4119 | Stone, D J | Palo Alto, CA 94301 | Oil & Gas Operator | Sep 1985 |
| 4120 | Stonegate Ranch LLC | Caney, KS 67333 | Oil Operator | Mar 2025 |
| 4121 | Stoskopf, Wayne | Hoisington, KS 67544 | Oil Operator | Apr 1995 |
| 4122 | Stotts-Kirkpatri | | Oil Operator | Oct 1991 |
| 4123 | Stoudt, Jean Marie | Broken Arrow, OK 74011 | Oil Operator | May 2024 |
| 4124 | STP Cherokee, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2014 |
| 4125 | Strabala Joseph | | Oil Operator | Jan 1992 |
| 4126 | Strait F W Incor | | Oil Operator | Jan 1992 |
| 4127 | Strat Land Exploration Company | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2025 |
| 4128 | Strata Energy Re | | Oil Operator | Nov 1987 |
| 4129 | Strata Exploration, Inc. | Fairfield, IL 62837 | Oil & Gas Operator | Mar 2025 |
| 4130 | Strata Oil Incor | | Oil Operator | Mar 1994 |
| 4131 | Stratakan Exploration, LLC | Plainville, KS 67663 | Oil & Gas Operator | Mar 2025 |
| 4132 | Stratex Oil & Gas Holdings, Inc. | Watertown, CT 06795 | Oil Operator | Jun 2015 |
| 4133 | Streamline Energy, LLC | Yates Center, KS 66783 | Oil & Gas Operator | Dec 2019 |
| 4134 | Striker Petroleum Corporation | Englewood, CO 80111 | Oil & Gas Operator | Dec 1999 |
| 4135 | Stripper Oil Com | | Oil Operator | Nov 1996 |
| 4136 | Stripper Oil Company Inc | | Oil Operator | Feb 2025 |
| 4137 | Stroke Of Luck Energy & Exploration LLC | Cassoday, KS 66842 | Oil Operator | Sep 2021 |
| 4138 | Stromquist C Dal | | Oil & Gas Operator | Aug 1991 |
| 4139 | Stromquist, C. Dale, A General Partnership | Liberal, KS 67901 | Oil & Gas Operator | Aug 2010 |
| 4140 | Stroud Oil Properties, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | May 2013 |
| 4141 | Stubbs & Fleming, A General Partnership | Wichita, KS 67202 | Oil Operator | Jul 2005 |
| 4142 | Stuber, VIrgil | Eureka, KS 67045 | Oil Operator | Dec 2019 |
| 4143 | Stucky Oil Compa | | Oil Operator | Mar 1988 |
| 4144 | Stucky Oil Company | Sedgwick, KS 67135 | Gas Operator | Aug 1999 |
| 4145 | Stucky, Edward P. | Sabetha, KS 66534 | Oil Operator | May 1992 |
| 4146 | Stucky, Kenneth R. Oil & Gas Operations | Burrton, KS 67020 | Oil & Gas Operator | Aug 2002 |
| 4147 | Studer Oil Co. | Pratt, KS 67124 | Oil Operator | Oct 2019 |
| 4148 | Studer Oil Compa | | Oil & Gas Operator | Feb 1993 |
| 4149 | Stull Crude Co, LLC | | Oil Operator | Mar 2025 |
| 4150 | Stull Oil LLC | Natoma, KS 67651 | Oil Operator | Mar 2025 |
| 4151 | Sublette Feeders LLC | Sublette, KS 67877 | Gas Operator | Mar 2025 |
| 4152 | Suemaur Expl. & Prod., LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jun 2024 |
| 4153 | Suerte Oil & Gas LLC | Caney, KS 67333 | Oil Operator | Mar 2025 |
| 4154 | Suerte Oil Compa | | Oil & Gas Operator | Oct 1995 |
| 4155 | Suerte Oil Company | Howard, KS 67349 | Oil & Gas Operator | Jan 2017 |
| 4156 | Sujen Enterprise | | Oil Operator | Sep 1989 |
| 4157 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 4158 | Sullivan And Company LLC | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2025 |
| 4159 | Summer Sun Gas, Inc. | Sedan, KS 67361 | Oil & Gas Operator | Dec 2014 |
| 4160 | Summit Operating LLC | Boulder, CO 80301 | Oil & Gas Operator | Apr 2025 |
| 4161 | Summitt Energy, LLC | Wichita, KS 67218 | Oil Operator | Mar 2025 |
| 4162 | Sun Oil Company | Arlington, TX 76006 | Oil & Gas Operator | Dec 2021 |
| 4163 | Sun Ventures | Bartlesville, OK 74003 | Oil Operator | Feb 1997 |
| 4164 | Sunardo Energy, Inc. | Castle Rock, CO 80104 | Oil Operator | Jan 1997 |
| 4165 | Sunburst Explora | | Oil Operator | May 1990 |
| 4166 | Sundance Oil & Gas, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Mar 2012 |
| 4167 | Sundance Oil, Inc. | Norfolk, NE 68702 | Oil Operator | Aug 1998 |
| 4168 | Sundgren, Stephen E. And Jackie | Rosalia, KS 67132 | Oil Operator | Jun 2023 |
| 4169 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Mar 2025 |
| 4170 | Sunfire Energy | | Oil & Gas Operator | Mar 2025 |
| 4171 | Sunflower Energy, LLC | Overland Park, KS 66210 | Oil Operator | Dec 2019 |
| 4172 | Sunflower Exploration, LLC | Overland Park, KS 66210 | Gas Operator | Mar 2025 |
| 4173 | Sunflower Well Service, Inc. | Canton, KS 67428 | Oil & Gas Operator | Nov 2024 |
| 4174 | Sunny Day Resour | | Oil Operator | Dec 1987 |
| 4175 | Sunoco Partners Marketing | | Oil Operator | Apr 2023 |
| 4176 | Sunrise Oil Corp | | Oil Operator | Mar 1992 |
| 4177 | Sunwest Explorat | | Oil & Gas Operator | Nov 1985 |
| 4178 | Super Oilwell Service | Russell, KS 67665 | Oil Operator | Mar 2025 |
| 4179 | Superior Oil Com | | Oil & Gas Operator | Dec 1994 |
| 4180 | Superior Oilfield Services LLC | Wichita, KS 67218 | Oil Operator | Mar 2025 |
| 4181 | Supernova Energy, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Nov 2019 |
| 4182 | Supra Energy, Inc. | Tulsa, OK 74137 | Oil & Gas Operator | May 1997 |
| 4183 | Sutton Investmen | | Oil Operator | Mar 1987 |
| 4184 | SW Gas Stge | | Gas Operator | Oct 2015 |
| 4185 | Swander, Everett | Cunningham, KS 67035 | Oil Operator | May 1998 |
| 4186 | Swenco-Western I | | Oil Operator | Sep 1987 |
| 4187 | Swenton, Michael J. | Tulsa, OK 74105 | Oil & Gas Operator | Apr 2025 |
| 4188 | Swift Energy Com | | Oil & Gas Operator | Sep 1995 |
| 4189 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 4190 | SX54, LLC | Sheridan, WY 82801 | Oil Operator | Nov 2017 |
| 4191 | T & C MFG. & Operating, Inc. | Great Bend, KS 67530 | Oil Operator | May 2022 |
| 4192 | T & C Oil, Inc. | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2024 |
| 4193 | T & D Oil Co. | Victoria, KS 67671 | Oil Operator | Apr 1996 |
| 4194 | T & D Oil Compan | | Oil Operator | Jan 1992 |
| 4195 | T & L Production | | Oil Operator | May 1987 |
| 4196 | T & P Oil & Gas, L.L.C. | Overland Park, KS 66212 | Oil Operator | Dec 2009 |
| 4197 | T & R Oil | Mapleton, KS 66754 | Oil & Gas Operator | May 2018 |
| 4198 | T & R Oil Company, A General Partnership | Moline, KS 67353 | Oil Operator | Dec 2019 |
| 4199 | T & W Ward Oil LLC | Blackwell, OK 74631 | Oil Operator | Apr 2025 |
| 4200 | T C Production | | Oil Operator | May 1994 |