| 4101 | Shorts Production LLC | Havana, KS 67347 | Oil Operator | Sep 2025 |
| 4102 | Shouse, Micheal C. | Liberty, MO 64068 | Oil & Gas Operator | Jan 1996 |
| 4103 | Shultz, Melvin W. | Parsons, KS 67357 | Oil Operator | Nov 1995 |
| 4104 | Sidwell Oil & Ga | | Oil & Gas Operator | May 1993 |
| 4105 | Sidwell Oil & Gas, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2014 |
| 4106 | Sieg Energy, Inc. | Ottawa, KS 66067 | Oil Operator | May 2025 |
| 4107 | Siegfried R H In | | Oil Operator | Apr 1985 |
| 4108 | Siemsen Operating, LLC | Holyrood, KS 67450 | Oil Operator | Aug 2025 |
| 4109 | Sierra Drilling | | Oil Operator | Sep 1988 |
| 4110 | Sierra Madre LLC | Greensburg, KS 67054 | Oil & Gas Operator | May 2015 |
| 4111 | Sierra Petroleum | | Oil & Gas Operator | Sep 1986 |
| 4112 | Silhan, Terry | Marion, KS 66861 | Oil & Gas Operator | Dec 2009 |
| 4113 | Silver Creek Oil | Merkel, TX 79536 | Oil & Gas Operator | Aug 2003 |
| 4114 | Silver Creek Oil & Gas, Inc. | Wichita, KS 67203 | Oil Operator | Dec 1997 |
| 4115 | Simasko Producti | | Oil Operator | Dec 1986 |
| 4116 | Simco Petroleum | Cheyenne, WY 82003 | Oil & Gas Operator | Oct 2009 |
| 4117 | Simminger, Robert John Jr | | Oil Operator | Sep 2025 |
| 4118 | Simmons Oil Corp | | Oil Operator | Jan 1989 |
| 4119 | Simmons Robert Z | | Oil Operator | Dec 1990 |
| 4120 | Single Barrel Oil And Gas LLC | Granbury, TX 76048 | Oil & Gas Operator | Feb 2026 |
| 4121 | Sirius Energy Corp. | Abilene, TX 79606 | Oil Operator | Dec 2009 |
| 4122 | Siroky Oil Management | Pratt, KS 67124 | Oil & Gas Operator | Sep 2025 |
| 4123 | Six-D Exploration, LLC | Hutchinson, KS 67502 | Oil Operator | Apr 2025 |
| 4124 | Skelly Oil Co | | Oil & Gas Operator | Mar 2005 |
| 4125 | SKKM Oil Company | | Oil Operator | Dec 1992 |
| 4126 | Sky Oil, L.L.C. | St. Paul, KS 66771 | Oil Operator | Dec 2004 |
| 4127 | Slawson Donald C | Wichita, KS 67202 | Oil & Gas Operator | Apr 2025 |
| 4128 | Slawson Explorat | | Oil & Gas Operator | Dec 1996 |
| 4129 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2026 |
| 4130 | SLMW Energy Comp | | Oil Operator | Jan 1989 |
| 4131 | Slo Oil, LLC | El Dorado, KS 67042 | Oil Operator | Jul 2025 |
| 4132 | Sloan Operations | | Oil Operator | Jul 2025 |
| 4133 | SM Oil & Gas Inc | Skiatook, OK 74070 | Oil & Gas Operator | Nov 2025 |
| 4134 | SMG Resources LLC | | Oil & Gas Operator | Sep 2025 |
| 4135 | Smith Cattle Inc | | Gas Operator | Dec 1994 |
| 4136 | Smith Lyle V & P | | Gas Operator | Sep 1993 |
| 4137 | Smith Oil & Gas LLC | Livermore, CO 80536 | Gas Operator | Sep 2025 |
| 4138 | Smith Oil Co. | Smackover, AR 71762 | Oil Operator | Jan 2025 |
| 4139 | Smith Oil Compan | | Oil Operator | Sep 1994 |
| 4140 | Smith Oil Operations | | Oil & Gas Operator | Sep 2025 |
| 4141 | Smith Ranch Company | Sharon Springs, KS 67758 | Gas Operator | May 2002 |
| 4142 | Smith Richard F | | Oil Operator | Jun 1995 |
| 4143 | Smith Todd W Oil | | Oil Operator | Jan 1994 |
| 4144 | Smith, Darrin R | Wilson, KS 67490 | Oil Operator | Sep 2025 |
| 4145 | Smith, David | Wichita Falls, TX 76310 | Oil Operator | Feb 2026 |
| 4146 | Smith, Edward J. | Clifton, NJ 07013 | Oil & Gas Operator | Dec 1995 |
| 4147 | Smith, Gordon R. | Madison, KS 66860 | Oil Operator | Nov 1998 |
| 4148 | Smith, Loren L. | Oswego, KS 67356 | Oil & Gas Operator | Sep 2009 |
| 4149 | Smith, Wanda | Syracuse, KS 67878 | Oil & Gas Operator | Sep 2014 |
| 4150 | Smitherman, Leon C., Jr. | Andover, KS 67002 | Oil Operator | Dec 2019 |
| 4151 | Smokey Valley Resources | Lyons, KS 67554 | Oil Operator | Jun 1998 |
| 4152 | Smokey Valley Resources, Inc. | Geneseo, KS 67444 | Oil Operator | Nov 2008 |
| 4153 | Smoky Valley Res | | Oil & Gas Operator | Dec 1995 |
| 4154 | Snedco, Inc. | Chickasha, OK 73023 | Oil Operator | Sep 2025 |
| 4155 | Snow Oil Company | Nocona, TX 76255 | Oil Operator | Feb 2026 |
| 4156 | SNR Kansas Operating, LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Dec 2019 |
| 4157 | SNR Operating, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Feb 2026 |
| 4158 | Snyder K E Compa | | Oil Operator | Jul 1987 |
| 4159 | Snyder Partners, General Partnership | Cody, WY 82414 | Oil & Gas Operator | Jul 2019 |
| 4160 | Snyder, Jim Estate (Deceased) | Hamilton, KS 66853 | Oil Operator | Dec 2009 |
| 4161 | Snyder, K. Lance | Hamilton, KS 66853 | Oil Operator | Nov 2004 |
| 4162 | So & Jo, LLC | Kansas City, MO 64158 | Oil Operator | Dec 2021 |
| 4163 | So-I , A General Partnership | Kansas City, MO 64106 | Oil & Gas Operator | Jun 2025 |
| 4164 | Sokan Operating, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Sep 2025 |
| 4165 | Soles Larry - Fe | | Oil Operator | Nov 1986 |
| 4166 | Somerset Energy | | Oil Operator | Feb 1986 |
| 4167 | Somerset Energy, Inc. | Louisburg, KS 66053 | Oil Operator | Sep 2025 |
| 4168 | Sommer Oil LLC | Richmond, KS 66080 | Oil Operator | Sep 2025 |
| 4169 | Sonat Exploration Co. | Houston, TX 77251 | Oil & Gas Operator | Dec 2021 |
| 4170 | Sonoma Resources LLC | Andover, KS 67002 | Oil & Gas Operator | Sep 2025 |
| 4171 | Sorensen, Kim A. | Abbyville, KS 67510 | Oil Operator | Mar 2025 |
| 4172 | Sotta, Donald E. | McCune, KS 66753 | Oil Operator | Jul 2025 |
| 4173 | Soule, Gilbert A. | Madison, KS 66860 | Oil Operator | Jan 2002 |
| 4174 | Soule, Richard A. | Eureka, KS 67045 | Oil Operator | Sep 2019 |
| 4175 | Source Energy Midcon LLC | Highlands Ranch, CO 80129 | Oil Operator | Jul 2015 |
| 4176 | Source Petroleum | Wichita, KS 67202 | Oil & Gas Operator | Oct 1993 |
| 4177 | South Bay Oil Corporation | Wichita, KS 67202 | Oil Operator | Dec 2019 |
| 4178 | South Central Oil And Gas | | Oil & Gas Operator | Feb 2014 |
| 4179 | South Forty Inc (The) | Laverne, OK 73848 | Oil & Gas Operator | Mar 2015 |
| 4180 | South Of Briles | | Oil Operator | Aug 1989 |
| 4181 | South Ranch Oil | | Gas Operator | Dec 1990 |
| 4182 | Southern Gas Inc | | Gas Operator | Jan 1987 |
| 4183 | Southern Hills Gas Co. | | Oil Operator | May 2025 |
| 4184 | Southern Star Central Gas Pipeline Inc | Owensboro, KY 42301 | Oil & Gas Operator | Nov 2025 |
| 4185 | Southern States | | Oil & Gas Operator | Jul 1988 |
| 4186 | Southland Royalt | | Oil & Gas Operator | Nov 1993 |
| 4187 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 4188 | Southwest Gas St | | Oil & Gas Operator | Dec 1981 |
| 4189 | Southwest Gas Storage Company | | Gas Operator | Sep 2025 |
| 4190 | Southwest Operating Company | Overland Park, KS 66212 | Oil & Gas Operator | Mar 2012 |
| 4191 | Southwind Consulting | Pratt, KS 67124 | Oil Operator | Oct 1997 |
| 4192 | Southwind Exploration, LLC | Venice, FL 34293 | Oil & Gas Operator | Sep 2003 |
| 4193 | Southwind Petroleum Corp. | Wichita, KS 67203 | Oil & Gas Operator | Jun 2022 |
| 4194 | Sovereign Operating Company, LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2016 |
| 4195 | Sowle Exploratio | | Oil Operator | Aug 1986 |
| 4196 | Sowle Explorations | | Oil Operator | Dec 2002 |
| 4197 | Spalsbury, Arthur L | Hays, KS 67601 | Oil Operator | Aug 2001 |
| 4198 | Specht Farms | Piqua, KS 66761 | Oil Operator | Nov 2009 |
| 4199 | Specht Oil | Iola, KS 66749 | Oil Operator | Mar 1998 |
| 4200 | Special Energy Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Feb 2026 |