| 4201 | St. Paul Oil And Gas Corp. | | Oil & Gas Operator | Aug 1991 |
| 4202 | Stable Energy L.L.C. | | Oil Operator | Dec 2023 |
| 4203 | Stallion Oil Corporation | | Oil & Gas Operator | Nov 1987 |
| 4204 | Stanco Petroleum Inc | Kimball, NE 69145 | Oil & Gas Operator | Jul 1999 |
| 4205 | Standard Operating Company, LLC | | Oil & Gas Operator | May 2022 |
| 4206 | Standard Production | | Oil Operator | Oct 1997 |
| 4207 | Star Energy Inc | Dayton, PA 16222-4325 | Oil & Gas Operator | Dec 2023 |
| 4208 | Star Falcon Oil Co. | | Oil Operator | Feb 1986 |
| 4209 | Star Oil & Gas, Inc. | | Oil & Gas Operator | Sep 1995 |
| 4210 | State Energy & Investment Inc. | | Oil & Gas Operator | Mar 1990 |
| 4211 | State Line Vacuum Services, LLC | | Oil Operator | Mar 2021 |
| 4212 | Statex Petroleum Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
| 4213 | Statoil Exploration (Us) Inc. | | Oil & Gas Operator | Jul 1997 |
| 4214 | Steaua Romana (Us) Inc. | | Oil & Gas Operator | Apr 1987 |
| 4215 | Stenco | | Oil & Gas Operator | Apr 1994 |
| 4216 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 4217 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Jan 2024 |
| 4218 | Stetson Petroleum Corp. | Rollins, MT 59931 | Oil & Gas Operator | Apr 2024 |
| 4219 | Steveco | | Oil Operator | Feb 1984 |
| 4220 | Stewart Oil Company | | Oil Operator | Jun 2009 |
| 4221 | Stinhall Corporation | | Oil & Gas Operator | Apr 1989 |
| 4222 | Stinson Gas Company, L.L.C. | | Gas Operator | Jul 2018 |
| 4223 | Stone Energy Corporation | Denver, CO 80202-2828 | Oil & Gas Operator | Oct 2014 |
| 4224 | Stone Oil Corp & McMoran Expl | | Oil & Gas Operator | Oct 1984 |
| 4225 | Stone Oil Corp - Strata Energy | | Oil & Gas Operator | Mar 1982 |
| 4226 | Stone Oil Corp-Forest Oil Corp | | Oil & Gas Operator | Jan 1983 |
| 4227 | Stone Oil-Lamson-Onshore Pet. | | Oil & Gas Operator | Jun 1985 |
| 4228 | Stone Oil-Quasar-Birthright | | Oil & Gas Operator | Feb 1981 |
| 4229 | Stone Petroleum Corporation | | Oil & Gas Operator | Dec 1996 |
| 4230 | Story Oil And Gas Inc | Magnolia, AR 71753 | Oil & Gas Operator | Feb 2024 |
| 4231 | Strago Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Aug 1994 |
| 4232 | Strahan Oil & Gas Co., Inc. | | Gas Operator | Oct 1983 |
| 4233 | Strand Energy, L.C. | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 4234 | Strat Land Exploration Company | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2023 |
| 4235 | Strata Energy, Inc. | | Oil & Gas Operator | Sep 1983 |
| 4236 | Stratco Operating Co Inc | Austin, TX 78701 | Oil & Gas Operator | Apr 2024 |
| 4237 | Strike Energy Corporation | Blackwell, OK 74631 | Oil & Gas Operator | Apr 2023 |
| 4238 | Striker Petroleum Corporation | Englewood, CO 80111 | Oil & Gas Operator | Dec 1999 |
| 4239 | Striper Oil, Inc. | Dallas, TX 75379 | Oil & Gas Operator | Apr 2002 |
| 4240 | Stroud Operating LLC | | Oil & Gas Operator | Dec 2012 |
| 4241 | Stroud Petroleum, Inc. | Shreveport, LA 71162 | Oil & Gas Operator | Apr 2024 |
| 4242 | Stroud Production LLC | Shreveport, LA 71101 | Oil & Gas Operator | Feb 2024 |
| 4243 | STS Petroleum LLC | Houston, TX 77289 | Oil & Gas Operator | Apr 2024 |
| 4244 | Stuart Oil | | Oil Operator | Jan 2024 |
| 4245 | Studley Resources Corporation | Humble, TX 77347 | Oil & Gas Operator | Dec 1996 |
| 4246 | STZ Petroleum Inc. | Houston, TX 77268 | Oil & Gas Operator | Dec 1997 |
| 4247 | Subsurface Resources Inc | Logan, UT 84321 | Oil & Gas Operator | Aug 1990 |
| 4248 | Suburban Propane Expl Co, Inc. | | Oil & Gas Operator | Jun 1983 |
| 4249 | Suburban Propane Gas Corp. | | Oil & Gas Operator | Sep 1980 |
| 4250 | Sue-Ann Operating, L.C. | Victoria, TX 77903 | Oil & Gas Operator | Apr 2024 |
| 4251 | Sugar Bowl Gas Corp. | | Oil Operator | Dec 1983 |
| 4252 | Sugar Bowl Industrial Gas Corp | | Oil Operator | Dec 1983 |
| 4253 | Sugar Creek Environmental, LLC | | Oil Operator | Dec 2023 |
| 4254 | Sugar Creek Producing Company | | Oil & Gas Operator | Dec 2010 |
| 4255 | Sugar Creek Producing Company, LLC | | Oil & Gas Operator | Jan 2024 |
| 4256 | Sugar Oil Company | | Oil & Gas Operator | Feb 2011 |
| 4257 | Sullivan Well Service | | Oil Operator | Mar 2010 |
| 4258 | Sulphur River Exploration, Inc. | Dallas, TX 75244 | Oil & Gas Operator | Apr 2024 |
| 4259 | Summit Energy Company | | Oil & Gas Operator | Mar 2009 |
| 4260 | Summit Energy, Inc. | Littleton, CO 80127 | Oil & Gas Operator | Aug 2013 |
| 4261 | Summit Gas LLC | | Oil & Gas Operator | Oct 2011 |
| 4262 | Summit Oil & Gas LLC | | Oil & Gas Operator | Feb 2024 |
| 4263 | Summit Operating LLC | Boulder, CO 80301 | Oil & Gas Operator | Feb 2024 |
| 4264 | Summit Overseas Expl., Inc. | Denver, CO 80226 | Oil & Gas Operator | Apr 2007 |
| 4265 | Summit Resources, Inc. | Houston, TX 77077 | Oil & Gas Operator | Sep 2016 |
| 4266 | Sun Exploration-Production Co. | | Oil & Gas Operator | Jan 1990 |
| 4267 | Sun Resources Texas, Inc. | Longview, TX 75606 | Oil & Gas Operator | Dec 2023 |
| 4268 | Sun Texas Company | | Oil & Gas Operator | Jun 1981 |
| 4269 | Sunburst, Inc. | Wheat Ridge, CO 80033 | Oil & Gas Operator | Feb 2024 |
| 4270 | Sunchase Exploration, Inc. | | Oil & Gas Operator | Oct 1997 |
| 4271 | Suncoast Investments Co., Inc. | Plano, TX 75074 | Oil & Gas Operator | Oct 2001 |
| 4272 | Suncoast Technical SVCS., Inc. | | Oil & Gas Operator | Dec 2011 |
| 4273 | Sundance Energy Corporation | | Oil & Gas Operator | Jan 2024 |
| 4274 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Apr 2024 |
| 4275 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Dec 2023 |
| 4276 | Sunex Resources Incorporated | | Oil Operator | Dec 1981 |
| 4277 | Sunland Production Company, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Feb 2024 |
| 4278 | Super Energy Inc. | | Oil & Gas Operator | Oct 1993 |
| 4279 | Superior - Austral | | Oil & Gas Operator | Apr 1978 |
| 4280 | Superior Oil Co. | Denver, CO 80217-5444 | Oil & Gas Operator | Feb 2001 |
| 4281 | Superior Operating LLC | | Oil Operator | Aug 2020 |
| 4282 | Superior Resources Corporation | | Oil Operator | Apr 2006 |
| 4283 | Superior-American Quasar | | Oil & Gas Operator | Jan 1981 |
| 4284 | Superior-Tenneco | | Oil & Gas Operator | Jun 1982 |
| 4285 | Sutton Joint Account | | Oil Operator | Mar 1988 |
| 4286 | Sutton-Gerard Et Al | | Oil & Gas Operator | Jan 1990 |
| 4287 | Sutton-Gerard-Sawyer | | Oil & Gas Operator | Jan 1990 |
| 4288 | Sutton-Sawyer | | Oil Operator | Mar 1989 |
| 4289 | SV Energy Company, LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2017 |
| 4290 | SW Associates | | Oil & Gas Operator | Dec 1985 |
| 4291 | Swag Oil And Gas Company, Inc. | | Oil & Gas Operator | Jul 1982 |
| 4292 | Swampfox Oilfield Services, LLC | | Oil & Gas Operator | Dec 2023 |
| 4293 | Swan Lake Properties, Inc. | | Oil Operator | Jul 1987 |
| 4294 | SWD Acidizing, Inc. | | Oil Operator | Feb 2014 |
| 4295 | SWD, Inc. | | Oil Operator | Jan 2024 |
| 4296 | Swepi LP | Houston, TX 77079 | Oil & Gas Operator | Jul 2020 |
| 4297 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 4298 | Swift Energy Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | Jun 2017 |
| 4299 | SWN Production (Louisiana), LLC | | Oil & Gas Operator | Nov 2023 |
| 4300 | SWN Production Company, LLC | Spring, TX 77391 | Oil & Gas Operator | Jan 2024 |