| 4101 | Sun Oil Company | Arlington, TX 76006 | Oil & Gas Operator | Dec 2021 |
| 4102 | Sun Ventures | Bartlesville, OK 74003 | Oil Operator | Feb 1997 |
| 4103 | Sunardo Energy, Inc. | Castle Rock, CO 80104 | Oil Operator | Jan 1997 |
| 4104 | Sunburst Explora | | Oil Operator | May 1990 |
| 4105 | Sundance Oil & Gas, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Mar 2012 |
| 4106 | Sundance Oil, Inc. | Norfolk, NE 68702 | Oil Operator | Aug 1998 |
| 4107 | Sundgren, Stephen E. And Jackie | Rosalia, KS 67132 | Oil Operator | Jun 2023 |
| 4108 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jul 2024 |
| 4109 | Sunfire Energy | | Oil & Gas Operator | Jul 2024 |
| 4110 | Sunflower Energy, LLC | Overland Park, KS 66210 | Oil Operator | Dec 2019 |
| 4111 | Sunflower Exploration, LLC | Overland Park, KS 66210 | Gas Operator | Jul 2024 |
| 4112 | Sunflower Well Service, Inc. | Canton, KS 67428 | Oil & Gas Operator | Jun 2024 |
| 4113 | Sunny Day Resour | | Oil Operator | Dec 1987 |
| 4114 | Sunoco Partners Marketing | | Oil Operator | Apr 2023 |
| 4115 | Sunrise Oil Corp | | Oil Operator | Mar 1992 |
| 4116 | Sunwest Explorat | | Oil & Gas Operator | Nov 1985 |
| 4117 | Super Oilwell Service | Russell, KS 67665 | Oil Operator | Jun 2024 |
| 4118 | Superior Oil Com | | Oil & Gas Operator | Dec 1994 |
| 4119 | Superior Oilfield Services LLC | Wichita, KS 67218 | Oil Operator | Nov 2023 |
| 4120 | Supernova Energy, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Nov 2019 |
| 4121 | Supra Energy, Inc. | Tulsa, OK 74137 | Oil & Gas Operator | May 1997 |
| 4122 | Sutton Investmen | | Oil Operator | Mar 1987 |
| 4123 | SW Gas Stge | | Gas Operator | Oct 2015 |
| 4124 | Swander, Everett | Cunningham, KS 67035 | Oil Operator | May 1998 |
| 4125 | Swenco-Western I | | Oil Operator | Sep 1987 |
| 4126 | Swenton, Michael J. | Tulsa, OK 74105 | Oil & Gas Operator | Aug 2024 |
| 4127 | Swift Energy Com | | Oil & Gas Operator | Sep 1995 |
| 4128 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 4129 | SX54, LLC | Sheridan, WY 82801 | Oil Operator | Nov 2017 |
| 4130 | T & C MFG. & Operating, Inc. | Great Bend, KS 67530 | Oil Operator | May 2022 |
| 4131 | T & C Oil, Inc. | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2024 |
| 4132 | T & D Oil Co. | Victoria, KS 67671 | Oil Operator | Apr 1996 |
| 4133 | T & D Oil Compan | | Oil Operator | Jan 1992 |
| 4134 | T & L Production | | Oil Operator | May 1987 |
| 4135 | T & P Oil & Gas, L.L.C. | Overland Park, KS 66212 | Oil Operator | Dec 2009 |
| 4136 | T & R Oil | Mapleton, KS 66754 | Oil & Gas Operator | May 2018 |
| 4137 | T & R Oil Company, A General Partnership | Moline, KS 67353 | Oil Operator | Dec 2019 |
| 4138 | T & W Ward Oil LLC | Blackwell, OK 74631 | Oil Operator | Sep 2024 |
| 4139 | T C Production | | Oil Operator | May 1994 |
| 4140 | T J D Oil Compan | | Oil Operator | Feb 1989 |
| 4141 | T-Bar Exploration, Inc. | Sterling, KS 67579 | Oil Operator | Apr 1998 |
| 4142 | T-N-T Engineering, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2024 |
| 4143 | T-Y Development Corp | Perryton, TX 79070 | Oil & Gas Operator | Nov 2024 |
| 4144 | T. T. Production, Inc. | Haviland, KS 67059 | Oil & Gas Operator | Feb 2008 |
| 4145 | T.C.G. Oil Co. | Iola, KS 66749 | Oil Operator | Sep 2009 |
| 4146 | T.C.G. Oil Co., A General Partnership | Laharpe, KS 66755 | Oil Operator | Aug 2009 |
| 4147 | T.J. Oil | | Oil Operator | Jul 2024 |
| 4148 | Taft Oil And Gas LLC | Bonham, TX 75418 | Oil & Gas Operator | Dec 2018 |
| 4149 | Tailwater, Inc. | Oklahoma City, OK 73154 | Oil Operator | Jan 2024 |
| 4150 | Talley Resources | | Oil Operator | Jun 1994 |
| 4151 | Tallgrass Explor | | Oil Operator | Sep 1987 |
| 4152 | Talon Group LLC | Hays, KS 67601 | Oil Operator | Jul 2024 |
| 4153 | Tamoil | | Oil Operator | May 2017 |
| 4154 | Tanner, M.B. | Moline, KS 67353 | Oil Operator | Apr 1986 |
| 4155 | Taos Resources Operating Co LLC | Houston, TX 77037 | Oil & Gas Operator | Dec 2019 |
| 4156 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Sep 2024 |
| 4157 | Targa Pipeline Mid-Continent Westok LLC | Sulphur, LA 70665 | Gas Operator | Jul 2024 |
| 4158 | Taurus Oil Compa | | Oil Operator | Oct 1994 |
| 4159 | Tauy Oil, Inc | Baldwin City, KS 66006 | Oil Operator | Jul 2024 |
| 4160 | Taylor Explorati | | Oil & Gas Operator | Jun 1985 |
| 4161 | Taylor Florence | | Oil Operator | Mar 1995 |
| 4162 | Taylor Oil Co. | Edmond, OK 73034 | Oil & Gas Operator | Jul 2024 |
| 4163 | Taylor-Brown Ope | | Oil Operator | Sep 1988 |
| 4164 | Taylor-Cranor Oi | | Oil Operator | Dec 1987 |
| 4165 | Tdi, Inc. | Hays, KS 67601 | Oil Operator | Jul 2024 |
| 4166 | Tdot Oil, Inc. | Sedan, KS 67361 | Oil Operator | Jul 2024 |
| 4167 | TDR Construction, Inc. | Wellsville, KS 66092 | Oil Operator | Jul 2024 |
| 4168 | Te-Pe Oil & Gas | | Oil & Gas Operator | Jul 2024 |
| 4169 | Te-Ray Energy, Inc. | Oklahoma City, OK 73108 | Oil & Gas Operator | Aug 2024 |
| 4170 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Nov 2024 |
| 4171 | Tec Drilling Com | | Oil Operator | Feb 1982 |
| 4172 | Tec Resources LLC | Tulsa, OK 74128 | Oil & Gas Operator | May 2013 |
| 4173 | Tech American Re | | Oil Operator | Sep 1985 |
| 4174 | Teg Midcontinent, Inc. | Aurora, CO 80014 | Oil Operator | Jul 2013 |
| 4175 | Tehi Illinois, LLC | Olney, IL 62450 | Oil & Gas Operator | Feb 2019 |
| 4176 | Teichgraeber Oil | | Oil Operator | Nov 1995 |
| 4177 | Teichgraeber Oil Co. | | Oil Operator | Dec 1994 |
| 4178 | Teichgraeber Oil, Inc. | Eureka, KS 67045 | Oil & Gas Operator | Apr 2024 |
| 4179 | Tekenergy, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 4180 | Teko Oil & Gas I | | Oil Operator | Aug 1992 |
| 4181 | Tema Oil And Gas, LLC | Houston, TX 77040 | Oil & Gas Operator | Apr 2000 |
| 4182 | Tema Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Jun 2009 |
| 4183 | Tenex Oil Corpor | | Oil Operator | May 1991 |
| 4184 | Tengasco, Inc. | Houston, TX 77063 | Oil & Gas Operator | Apr 2024 |
| 4185 | Tenison Oil Comp | | Oil Operator | Jan 1993 |
| 4186 | Tenk, Lawrence O. | Ottawa, KS 66067 | Oil & Gas Operator | Oct 1998 |
| 4187 | Tenneco Oil Comp | | Oil & Gas Operator | Aug 1995 |
| 4188 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Aug 2024 |
| 4189 | Terra Max Energy | | Oil Operator | Mar 1986 |
| 4190 | Terra Resc Incor | | Oil Operator | Mar 1986 |
| 4191 | Terrol Energy In | | Oil Operator | Feb 1993 |
| 4192 | Terrol Energy, Inc. | Hygiene, CO 80533 | Oil & Gas Operator | Dec 2006 |
| 4193 | Tesoro Petroleum | | Oil Operator | Mar 1982 |
| 4194 | Tet Energy | | Oil Operator | Jun 2024 |
| 4195 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Jul 2024 |
| 4196 | Texaco Explorati | | Oil & Gas Operator | Dec 1996 |
| 4197 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 4198 | Texaco USA - Mor | | Oil Operator | Aug 1988 |
| 4199 | Texas Energies I | | Oil & Gas Operator | Aug 1994 |
| 4200 | Texas Energies, Inc. | Pratt, KS 67124 | Oil & Gas Operator | Aug 1998 |