| 4101 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Apr 2024 |
| 4102 | Smackover Drilling Company Inc | Shreveport, LA 71104 | Oil & Gas Operator | Feb 2024 |
| 4103 | Smal Energy Corp | Tyler, TX 75710 | Oil & Gas Operator | Oct 1995 |
| 4104 | SMC Oil & Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 4105 | Smith Oil & Gas Co., Inc. | Wichita Falls, TX 76310 | Oil Operator | Dec 2010 |
| 4106 | Smith Operating And MGMT Co. | Shreveport, LA 71161 | Oil & Gas Operator | Jun 2023 |
| 4107 | Smith Operating-Germany Oil | | Oil & Gas Operator | Dec 1995 |
| 4108 | Smith Petroleum Company | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |
| 4109 | Smith Production Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 4110 | Smith-Wentworth | | Oil & Gas Operator | Sep 1983 |
| 4111 | Smith-Wentworth & Coquina | | Oil Operator | Jun 1983 |
| 4112 | Smith-Wentworth & Hughes & New | | Oil Operator | Jun 1983 |
| 4113 | SMK-La, Inc. | | Oil & Gas Operator | Sep 1999 |
| 4114 | SMR Natural Gas Ventures Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Jan 1999 |
| 4115 | SND Operating, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 4116 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 4117 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 4118 | Sohio Petr Co-Gulf Oil Corp | | Oil & Gas Operator | Dec 1979 |
| 4119 | Sohio Petroleum Co. | Casper, WY 82602 | Oil & Gas Operator | Apr 1986 |
| 4120 | Sohio Petroleum Co. Et Al | | Oil & Gas Operator | May 1979 |
| 4121 | Sola Oil Company, Inc. | | Oil & Gas Operator | Aug 1991 |
| 4122 | Sola Operating, LLC | Trout, LA 71371 | Oil Operator | Apr 2024 |
| 4123 | Solatex | | Oil & Gas Operator | Oct 1978 |
| 4124 | Solatex Resources, LTD | Houston, TX 77257 | Oil & Gas Operator | Apr 2024 |
| 4125 | Soldier Operating LLC | | Oil & Gas Operator | Dec 2023 |
| 4126 | Solid Rock Prod. | | Oil Operator | Nov 1994 |
| 4127 | Son-Dad Oil & Gas | | Oil & Gas Operator | Dec 1994 |
| 4128 | Sonat Exploration Co. | Houston, TX 77251 | Oil & Gas Operator | Dec 2021 |
| 4129 | Sonat Exploration Gom Inc. | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 4130 | Sonny King | | Oil & Gas Operator | Jan 2024 |
| 4131 | Sonny King Production | | Oil & Gas Operator | Jan 2024 |
| 4132 | Sonora Producing, Inc. | | Oil & Gas Operator | May 2006 |
| 4133 | Sonoran Energy Inc. | Addison, TX 75001 | Oil & Gas Operator | Apr 2024 |
| 4134 | Sooner Corporation | | Oil & Gas Operator | Oct 1990 |
| 4135 | Sooner Resources, Inc. | | Oil & Gas Operator | Mar 1987 |
| 4136 | Sotrana-Texas Corp. | | Oil & Gas Operator | Oct 1984 |
| 4137 | Sound Resources Corporation | | Oil & Gas Operator | Jan 2004 |
| 4138 | Source Petroleum Inc. | San Antonio, TX 78265 | Oil & Gas Operator | Apr 2024 |
| 4139 | South Central Petroleum, Inc. | | Oil & Gas Operator | Dec 1988 |
| 4140 | South Coast Oil, Inc. | | Oil & Gas Operator | Jul 1989 |
| 4141 | South La. Production Co., Inc. | | Oil & Gas Operator | Jun 1982 |
| 4142 | South Leeville, LLC | Houston, TX 77069 | Oil & Gas Operator | Oct 2022 |
| 4143 | South Oak Production Company | | Oil & Gas Operator | Jun 2010 |
| 4144 | South River Operating, LLC | | Oil & Gas Operator | Dec 2016 |
| 4145 | Southampton Mineral Corp. | | Oil & Gas Operator | Aug 2005 |
| 4146 | Southco Oil And Gas Inc. | | Oil & Gas Operator | Oct 2000 |
| 4147 | Southeastern Public Service Co | | Oil & Gas Operator | Sep 1982 |
| 4148 | Southern Bay Operating, L.L.C. | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 4149 | Southern G Holdings, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2007 |
| 4150 | Southern Management Services | | Oil Operator | May 2017 |
| 4151 | Southern Natural Gas Co | Houston, TX 77001 | Oil & Gas Operator | Dec 2011 |
| 4152 | Southern Natural Gas Company LLC | | Oil & Gas Operator | Nov 2023 |
| 4153 | Southern Oil & Gas Company | | Oil & Gas Operator | Mar 2011 |
| 4154 | Southern Oil Of Louisiana LLC | Madisonville, LA 70447 | Oil & Gas Operator | Apr 2024 |
| 4155 | Southern Operating, Inc. | | Oil Operator | Dec 2000 |
| 4156 | Southern Petroleum Company | | Oil & Gas Operator | Jan 1994 |
| 4157 | Southern Production & Expl Co. | | Oil & Gas Operator | Apr 2008 |
| 4158 | Southern Production Co | Healdton, OK 73438-0400 | Oil & Gas Operator | Jan 2024 |
| 4159 | Southern Production SVC., Inc. | | Oil Operator | Mar 1997 |
| 4160 | Southern Solutions And Services LLC | | Oil Operator | Dec 2014 |
| 4161 | Southern Star Operating, Inc. | | Oil & Gas Operator | Jun 2010 |
| 4162 | Southern States Gas & Oil LTD | | Oil & Gas Operator | Jul 2004 |
| 4163 | Southern States Oil Production, LLC | | Oil & Gas Operator | Oct 2013 |
| 4164 | Southern States Petroleum Corp | | Oil Operator | Jan 1984 |
| 4165 | Southern Union Exploration Co. | Austin, TX 78701 | Oil & Gas Operator | Feb 2002 |
| 4166 | Southern Water Disposal, LLC | | Oil Operator | Dec 2023 |
| 4167 | Southern Wells, Inc. | | Oil Operator | Sep 2002 |
| 4168 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 4169 | Southport Exploration Inc | Tulsa, OK 74103-4015 | Oil & Gas Operator | Nov 1998 |
| 4170 | Southwest Gas Producing Co Inc | | Oil & Gas Operator | Nov 1994 |
| 4171 | Southwest General Dev., Inc. | | Oil & Gas Operator | Dec 2003 |
| 4172 | Southwest Oil Properties, Inc. | | Oil & Gas Operator | Feb 1996 |
| 4173 | Southwest Operating Inc. | | Oil & Gas Operator | Dec 2023 |
| 4174 | Southwest Rig Service | | Oil & Gas Operator | Nov 1998 |
| 4175 | Southwestern Electric Power Co | Dallas, TX 75266 | Oil & Gas Operator | Dec 1989 |
| 4176 | Southwestern Energy Prod Co | Houston, TX 77032 | Oil & Gas Operator | Jun 2015 |
| 4177 | Southwind Oil & Gas LLC | | Oil & Gas Operator | Dec 2023 |
| 4178 | Sovereign Energy Corp. | | Oil Operator | Dec 2001 |
| 4179 | Spartan Operating Company, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Feb 2013 |
| 4180 | Spartan Petroleum Corporation | Houston, TX 77079 | Oil & Gas Operator | Oct 1987 |
| 4181 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2024 |
| 4182 | Speco Oil Company | | Oil & Gas Operator | Feb 1980 |
| 4183 | Spicy Daugx Operators Louisiana LLC | | Oil & Gas Operator | Oct 2023 |
| 4184 | Spillers Petroleum, Inc. | | Gas Operator | Mar 2010 |
| 4185 | Spindletop Drilling Co. | Dallas, TX 75230 | Oil & Gas Operator | Apr 2024 |
| 4186 | Spirit Petroleum Company | | Oil & Gas Operator | Apr 1999 |
| 4187 | Spokane Operating, LLC | | Oil & Gas Operator | Dec 2023 |
| 4188 | Spooner & Marlin Expl., Inc. | | Oil & Gas Operator | Mar 1990 |
| 4189 | Spooner Petroleum Company | | Oil & Gas Operator | Nov 2023 |
| 4190 | Spyglass Oil & Gas LLC | | Oil & Gas Operator | Dec 2023 |
| 4191 | Square Mile Energy, L.L.C. | Houston, TX 77057 | Oil & Gas Operator | Apr 2024 |
| 4192 | Square One Corporation | Giddings, TX 78942 | Oil & Gas Operator | Dec 2012 |
| 4193 | SRP Production Corp. | | Oil & Gas Operator | Nov 1997 |
| 4194 | Ssi Energy LLC | | Oil & Gas Operator | Jul 2021 |
| 4195 | SSM Partnership-PV79 | | Oil Operator | Jun 1989 |
| 4196 | St. Croix Corporation | | Oil & Gas Operator | Apr 1990 |
| 4197 | St. Johns Operating #1 L.P. | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 4198 | St. Mary Energy Company | Houston, TX 77079 | Oil & Gas Operator | Aug 2008 |
| 4199 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 4200 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |