| 4101 | Shadrack Production Company | | Gas Operator | Dec 1982 |
| 4102 | Shale Energy International, LLC | | Oil & Gas Operator | May 2024 |
| 4103 | Shana Petroleum Company | Dallas, TX 75206 | Oil & Gas Operator | Sep 2002 |
| 4104 | Shannon Williams | | Oil Operator | Jan 1993 |
| 4105 | Shaw-Laird, LLC | | Oil & Gas Operator | Jan 2017 |
| 4106 | Shelby H. Loe, SR. Oil Co. | | Oil Operator | Jul 1989 |
| 4107 | Shelby Operating Company | Dallas, TX 75205 | Oil & Gas Operator | Nov 2024 |
| 4108 | Shelf Energy, LLC | | Oil & Gas Operator | Jun 2024 |
| 4109 | Shell Offshore Inc. | New Orleans, LA 70161 | Oil & Gas Operator | Jan 2008 |
| 4110 | Shell Oil Company | Houston, TX 77210 | Oil & Gas Operator | Apr 2015 |
| 4111 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 4112 | Shenandoah Oil Corporation | | Oil & Gas Operator | Jun 1979 |
| 4113 | Sheridan Energy,Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2000 |
| 4114 | Shield Energy Resources, LLC | | Oil Operator | Jun 2024 |
| 4115 | Shiloh Creek Resources, Inc. | | Gas Operator | Jun 2024 |
| 4116 | Shocker Energy, Inc. | | Oil & Gas Operator | Oct 1992 |
| 4117 | Shoco Production, L.P. | Kilgore, TX 75663 | Oil & Gas Operator | May 2020 |
| 4118 | Shongaloo Midstream, LLC | | Oil Operator | Mar 2019 |
| 4119 | Shore Oil Company | | Oil & Gas Operator | May 1998 |
| 4120 | Shoreline Exploration Of Texas | | Oil & Gas Operator | Oct 2000 |
| 4121 | Shoreline Exploration, Inc. | | Oil & Gas Operator | Jul 1990 |
| 4122 | Shoreline GP LLC | | Oil & Gas Operator | Jun 2012 |
| 4123 | Shoreline Offshore LLC | | Oil & Gas Operator | Jun 2017 |
| 4124 | Shoreline Petroleum Corp. | Channelview, TX 77530 | Oil & Gas Operator | Sep 2003 |
| 4125 | Shoreline Pipeline Corporation | | Oil Operator | Dec 2020 |
| 4126 | Shoreline Southeast LLC | | Oil & Gas Operator | Jun 2017 |
| 4127 | SHS Operating Company | Shreveport, LA 71149 | Oil & Gas Operator | Jul 2024 |
| 4128 | Shufflin Energy | | Oil & Gas Operator | Sep 2011 |
| 4129 | Shuler Drilling Co., Inc. | El Dorado, AR 71730 | Oil & Gas Operator | Jul 2024 |
| 4130 | Shuteston Oil & Gas | | Oil & Gas Operator | Sep 1997 |
| 4131 | Sierra Industries, Inc. | | Oil & Gas Operator | Apr 1989 |
| 4132 | Sierra Production Company | | Oil & Gas Operator | May 1986 |
| 4133 | Sigma Energy, LLC | | Oil Operator | Jul 2024 |
| 4134 | Signal Oil And Gas Company | Colleyville, TX 76034 | Oil & Gas Operator | Nov 2024 |
| 4135 | Signal Petroleum | | Oil & Gas Operator | Jul 1980 |
| 4136 | Signal, LLC Of Mississippi | | Oil & Gas Operator | Jun 2024 |
| 4137 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Nov 2024 |
| 4138 | Silver Hill Energy Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Nov 2024 |
| 4139 | Silver Oak Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2016 |
| 4140 | Silver Oak Operating, Inc. | Longview, TX 75601 | Oil & Gas Operator | Dec 2009 |
| 4141 | Silver Oak Operating, LLC | Longview, TX 75604 | Oil & Gas Operator | Nov 2024 |
| 4142 | Silver Pines Energy Corp. | Houston, TX 77005 | Oil & Gas Operator | Sep 2024 |
| 4143 | Simar Petroleum, LLC | | Oil Operator | Jun 2024 |
| 4144 | Simco Oil Company | | Oil Operator | Jul 1990 |
| 4145 | Simmons Oil Corporation | | Oil Operator | Jan 1989 |
| 4146 | Simpson Well Service, Inc. | | Oil Operator | Dec 1996 |
| 4147 | Singer Fleischaker Oil Op. Co. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2002 |
| 4148 | Singer-Fleischaker Oil Co Inc | | Oil & Gas Operator | Jul 1987 |
| 4149 | Singer-Fleischaker,Dillon | | Oil & Gas Operator | Aug 1979 |
| 4150 | Single Barrel Oil And Gas LLC | Granbury, TX 76048 | Oil & Gas Operator | Nov 2024 |
| 4151 | Sitwell, Inc. | | Oil Operator | May 2022 |
| 4152 | Skelly Oil Co | | Oil & Gas Operator | Mar 2005 |
| 4153 | Skinner Energy Management, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Jan 2011 |
| 4154 | Sklar & Phillips - Harry Hurt | | Oil & Gas Operator | Jul 1986 |
| 4155 | Sklar & Phillips Oil Co. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2000 |
| 4156 | Sklar & Phillips Oil Co.-Entex | | Oil & Gas Operator | Aug 1978 |
| 4157 | Sklar &Phillips-Great Southern | | Oil & Gas Operator | Aug 1980 |
| 4158 | Sklar Exploration Company LLC | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2024 |
| 4159 | Skrivanos Engineering, Inc. | Shreveport, LA 71164 | Oil & Gas Operator | Dec 2011 |
| 4160 | Skyhawk Energy, LLC | | Oil Operator | Jun 2024 |
| 4161 | Skyline Oil Company | Salt Lake City, UT 84111 | Oil & Gas Operator | Jan 1987 |
| 4162 | SKZ Inc. | | Oil Operator | Mar 1988 |
| 4163 | Slam Resources, Inc. | | Oil & Gas Operator | Apr 1994 |
| 4164 | Slapco - Emerald Exploration | | Gas Operator | Sep 1979 |
| 4165 | Sleeth And Brooks Oil Co. | | Oil Operator | Jul 1989 |
| 4166 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Nov 2024 |
| 4167 | Smackover Drilling Company Inc | Shreveport, LA 71104 | Oil & Gas Operator | Jul 2024 |
| 4168 | Smal Energy Corp | Tyler, TX 75710 | Oil & Gas Operator | Oct 1995 |
| 4169 | SMC Oil & Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Nov 2024 |
| 4170 | Smith Oil & Gas Co., Inc. | Wichita Falls, TX 76310 | Oil Operator | Dec 2010 |
| 4171 | Smith Operating And MGMT Co. | Shreveport, LA 71161 | Oil & Gas Operator | Jun 2023 |
| 4172 | Smith Operating-Germany Oil | | Oil & Gas Operator | Dec 1995 |
| 4173 | Smith Petroleum Company | Spring, TX 77389 | Oil & Gas Operator | Nov 2024 |
| 4174 | Smith Production Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Nov 2024 |
| 4175 | Smith-Wentworth | | Oil & Gas Operator | Sep 1983 |
| 4176 | Smith-Wentworth & Coquina | | Oil Operator | Jun 1983 |
| 4177 | Smith-Wentworth & Hughes & New | | Oil Operator | Jun 1983 |
| 4178 | SMK-La, Inc. | | Oil & Gas Operator | Sep 1999 |
| 4179 | SMR Natural Gas Ventures Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Jan 1999 |
| 4180 | SND Operating, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2024 |
| 4181 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 4182 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 4183 | Sohio Petr Co-Gulf Oil Corp | | Oil & Gas Operator | Dec 1979 |
| 4184 | Sohio Petroleum Co. | Casper, WY 82602 | Oil & Gas Operator | Apr 1986 |
| 4185 | Sohio Petroleum Co. Et Al | | Oil & Gas Operator | May 1979 |
| 4186 | Sola Oil Company, Inc. | | Oil & Gas Operator | Aug 1991 |
| 4187 | Sola Operating, LLC | Trout, LA 71371 | Oil Operator | Nov 2024 |
| 4188 | Solatex | | Oil & Gas Operator | Oct 1978 |
| 4189 | Solatex Resources, LTD | Houston, TX 77257 | Oil & Gas Operator | Nov 2024 |
| 4190 | Soldier Operating LLC | | Oil & Gas Operator | Jun 2024 |
| 4191 | Solid Rock Prod. | | Oil Operator | Nov 1994 |
| 4192 | Son-Dad Oil & Gas | | Oil & Gas Operator | Dec 1994 |
| 4193 | Sonat Exploration Co. | Houston, TX 77251 | Oil & Gas Operator | Dec 2021 |
| 4194 | Sonat Exploration Gom Inc. | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 4195 | Sonny King | | Oil & Gas Operator | Jul 2024 |
| 4196 | Sonny King Production | | Oil & Gas Operator | May 2024 |
| 4197 | Sonora Producing, Inc. | | Oil & Gas Operator | May 2006 |
| 4198 | Sonoran Energy Inc. | Addison, TX 75001 | Oil & Gas Operator | Nov 2024 |
| 4199 | Sooner Corporation | | Oil & Gas Operator | Oct 1990 |
| 4200 | Sooner Resources, Inc. | | Oil & Gas Operator | Mar 1987 |