| 4101 | Stromquist C Dal | | Oil & Gas Operator | Aug 1991 |
| 4102 | Stromquist, C. Dale, A General Partnership | Liberal, KS 67901 | Oil & Gas Operator | Aug 2010 |
| 4103 | Stroud Oil Properties, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | May 2013 |
| 4104 | Stubbs & Fleming, A General Partnership | Wichita, KS 67202 | Oil Operator | Jul 2005 |
| 4105 | Stuber, VIrgil | Eureka, KS 67045 | Oil Operator | Dec 2019 |
| 4106 | Stucky Oil Compa | | Oil Operator | Mar 1988 |
| 4107 | Stucky, Edward P. | Sabetha, KS 66534 | Oil Operator | May 1992 |
| 4108 | Stucky, Kenneth R. Oil & Gas Operations | Burrton, KS 67020 | Oil & Gas Operator | Aug 2002 |
| 4109 | Studer Oil Co. | Pratt, KS 67124 | Oil Operator | Oct 2019 |
| 4110 | Studer Oil Compa | | Oil & Gas Operator | Feb 1993 |
| 4111 | Stull Crude Co, LLC | | Oil Operator | May 2026 |
| 4112 | Stull Oil LLC | Natoma, KS 67651 | Oil Operator | May 2026 |
| 4113 | Sublette Feeders LLC | Sublette, KS 67877 | Gas Operator | May 2026 |
| 4114 | Suemaur Expl. & Prod., LLC | Corpus Christ, TX 78401 | Oil & Gas Operator | Jun 2024 |
| 4115 | Suerte Oil & Gas LLC | Caney, KS 67333 | Oil Operator | Mar 2025 |
| 4116 | Suerte Oil Compa | | Oil & Gas Operator | Oct 1995 |
| 4117 | Suerte Oil Company | Howard, KS 67349 | Oil & Gas Operator | Jan 2017 |
| 4118 | Sujen Enterprise | | Oil Operator | Sep 1989 |
| 4119 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 4120 | Sullivan And Company LLC | Tulsa, OK 74119 | Oil & Gas Operator | Jul 2026 |
| 4121 | Summer Sun Gas, Inc. | Sedan, KS 67361 | Oil & Gas Operator | Dec 2014 |
| 4122 | Summit Operating LLC | Boulder, CO 80301 | Oil & Gas Operator | Jul 2026 |
| 4123 | Summitt Energy, LLC | Wichita, KS 67218 | Oil Operator | Mar 2026 |
| 4124 | Sun Oil Company | Dallas, TX 75373 | Oil & Gas Operator | Dec 2021 |
| 4125 | Sun Ventures | Bartlesville, OK 74003 | Oil Operator | Feb 1997 |
| 4126 | Sunardo Energy, Inc. | Castle Rock, CO 80104 | Oil Operator | Jan 1997 |
| 4127 | Sunburst Explora | | Oil Operator | May 1990 |
| 4128 | Sundance Oil & Gas, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Mar 2012 |
| 4129 | Sundance Oil, Inc. | Norfolk, NE 68702 | Oil Operator | Aug 1998 |
| 4130 | Sundgren, Stephen E. And Jackie | Rosalia, KS 67132 | Oil Operator | Jun 2023 |
| 4131 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 4132 | Sunfire Energy | | Oil & Gas Operator | May 2026 |
| 4133 | Sunflower Energy, LLC | Overland Park, KS 66210 | Oil Operator | Dec 2019 |
| 4134 | Sunflower Exploration, LLC | Overland Park, KS 66210 | Gas Operator | May 2026 |
| 4135 | Sunflower Well Service, Inc. | Canton, KS 67428 | Oil & Gas Operator | Dec 2025 |
| 4136 | Sunny Day Resour | | Oil Operator | Dec 1987 |
| 4137 | Sunoco Partners Marketing | | Oil Operator | Apr 2023 |
| 4138 | Sunrise Oil Corp | | Oil Operator | Mar 1992 |
| 4139 | Sunwest Explorat | | Oil & Gas Operator | Nov 1985 |
| 4140 | Super Oilwell Service | Russell, KS 67665 | Oil Operator | Mar 2026 |
| 4141 | Superior Oil Com | | Oil & Gas Operator | Dec 1994 |
| 4142 | Superior Oilfield Services LLC | Wichita, KS 67218 | Oil Operator | May 2026 |
| 4143 | Supernova Energy, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Nov 2019 |
| 4144 | Supra Energy, Inc. | Tulsa, OK 74137 | Oil & Gas Operator | May 1997 |
| 4145 | Sutton Investmen | | Oil Operator | Mar 1987 |
| 4146 | SW Gas Stge | | Gas Operator | Oct 2015 |
| 4147 | Swander, Everett | Cunningham, KS 67035 | Oil Operator | May 1998 |
| 4148 | Swenco-Western I | | Oil Operator | Sep 1987 |
| 4149 | Swenton Michael J | Tulsa, OK 74105 | Oil & Gas Operator | Jul 2026 |
| 4150 | Swift Energy Com | | Oil & Gas Operator | Sep 1995 |
| 4151 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 4152 | SX54, LLC | Sheridan, WY 82801 | Oil Operator | Nov 2017 |
| 4153 | T & C MFG. & Operating, Inc. | Great Bend, KS 67530 | Oil Operator | May 2022 |
| 4154 | T & C Oil, Inc. | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2024 |
| 4155 | T & D Oil Co. | Victoria, KS 67671 | Oil Operator | Apr 1996 |
| 4156 | T & D Oil Compan | | Oil Operator | Jan 1992 |
| 4157 | T & G Oil Operations LLC | | Oil Operator | May 2026 |
| 4158 | T & L Production | | Oil Operator | May 1987 |
| 4159 | T & P Oil & Gas, L.L.C. | Overland Park, KS 66212 | Oil Operator | Dec 2009 |
| 4160 | T & R Oil Company, A General Partnership | Moline, KS 67353 | Oil Operator | Dec 2019 |
| 4161 | T & W Ward Oil LLC | Blackwell, OK 74631 | Oil Operator | Jun 2026 |
| 4162 | T C Production | | Oil Operator | May 1994 |
| 4163 | T G T Petroleum Corporation | Wichita, KS 67275 | Oil & Gas Operator | May 2026 |
| 4164 | T J D Oil Compan | | Oil Operator | Feb 1989 |
| 4165 | T-Bar Exploration, Inc. | Sterling, KS 67579 | Oil Operator | Apr 1998 |
| 4166 | T-N-T Engineering, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Sep 2026 |
| 4167 | T-R Oil | Mapleton, KS 66754 | Oil & Gas Operator | May 2018 |
| 4168 | T-Y Development Corp | Perryton, TX 79070 | Oil & Gas Operator | Sep 2026 |
| 4169 | T. T. Production, Inc. | Haviland, KS 67059 | Oil & Gas Operator | Feb 2008 |
| 4170 | T.C.G. Oil Co. | Iola, KS 66749 | Oil Operator | Sep 2009 |
| 4171 | T.C.G. Oil Co., A General Partnership | Laharpe, KS 66755 | Oil Operator | Aug 2009 |
| 4172 | T.J. Oil | | Oil Operator | Apr 2026 |
| 4173 | Taft Oil And Gas LLC | Bonham, TX 75418 | Oil & Gas Operator | Dec 2018 |
| 4174 | Tailwater, Inc. | Oklahoma City, OK 73154 | Oil Operator | Aug 2024 |
| 4175 | Talley Resources | | Oil Operator | Jun 1994 |
| 4176 | Tallgrass Explor | | Oil Operator | Sep 1987 |
| 4177 | Talon Group LLC | Hays, KS 67601 | Oil Operator | May 2026 |
| 4178 | Tamoil | | Oil Operator | May 2017 |
| 4179 | Tanner, M.B. | Moline, KS 67353 | Oil Operator | Apr 1986 |
| 4180 | Taos Resources Operating Co LLC | Houston, TX 77037 | Oil & Gas Operator | Dec 2019 |
| 4181 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Jul 2026 |
| 4182 | Targa Pipeline Mid-Continent Westok LLC | Sulphur, LA 70665 | Gas Operator | May 2026 |
| 4183 | Tatanka Operating - Kan, LLC | | Oil Operator | May 2026 |
| 4184 | Taurus Oil Compa | | Oil Operator | Oct 1994 |
| 4185 | Tauy Oil, Inc | Baldwin City, KS 66006 | Oil Operator | Apr 2026 |
| 4186 | Taylor Explorati | | Oil & Gas Operator | Jun 1985 |
| 4187 | Taylor Florence | | Oil Operator | Mar 1995 |
| 4188 | Taylor Oil Company | Edmond, OK 73034 | Oil & Gas Operator | May 2026 |
| 4189 | Taylor-Brown Ope | | Oil Operator | Sep 1988 |
| 4190 | Taylor-Cranor Oi | | Oil Operator | Dec 1987 |
| 4191 | Tdi, Inc. | Hays, KS 67601 | Oil Operator | May 2026 |
| 4192 | Tdot Oil, Inc. | Sedan, KS 67361 | Oil Operator | May 2026 |
| 4193 | TDR Construction, Inc. | Wellsville, KS 66092 | Oil Operator | May 2026 |
| 4194 | Te-Pe Oil & Gas | | Oil & Gas Operator | May 2026 |
| 4195 | Te-Ray Energy Inc | Oklahoma City, OK 73108 | Oil & Gas Operator | Jun 2026 |
| 4196 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Sep 2026 |
| 4197 | Tec Drilling Com | | Oil Operator | Feb 1982 |
| 4198 | Tec Resources LLC | Tulsa, OK 74128 | Oil & Gas Operator | May 2013 |
| 4199 | Tech American Re | | Oil Operator | Sep 1985 |
| 4200 | Teg Midcontinent, Inc. | Aurora, CO 80014 | Oil Operator | Jul 2013 |