| 4301 | Shoreline Offshore LLC | | Oil & Gas Operator | Jun 2017 |
| 4302 | Shoreline Petroleum Corp. | Channelview, TX 77530 | Oil & Gas Operator | Sep 2003 |
| 4303 | Shoreline Pipeline Corporation | | Oil Operator | Dec 2020 |
| 4304 | Shoreline Southeast LLC | | Oil & Gas Operator | Jun 2017 |
| 4305 | SHS Operating Company | Shreveport, LA 71149 | Oil & Gas Operator | Jan 2025 |
| 4306 | Shufflin Energy | | Oil & Gas Operator | Sep 2011 |
| 4307 | Shuler Drilling Co., Inc. | El Dorado, AR 71730 | Oil & Gas Operator | Jan 2025 |
| 4308 | Shuler DRLG Co &Roy Guffey Oil | | Oil & Gas Operator | Sep 1992 |
| 4309 | Shuteston Oil & Gas | | Oil & Gas Operator | Sep 1997 |
| 4310 | Sierra Industries, Inc. | | Oil & Gas Operator | Apr 1989 |
| 4311 | Sierra Oil & Gas Corp. | | Gas Operator | Dec 1979 |
| 4312 | Sierra Production Company | | Oil & Gas Operator | May 1986 |
| 4313 | Sigma Energy, LLC | | Oil Operator | Jan 2025 |
| 4314 | Signal Oil And Gas Company | Colleyville, TX 76034 | Oil & Gas Operator | Feb 2026 |
| 4315 | Signal Operating L.L.C. | | Oil Operator | Jan 2025 |
| 4316 | Signal Petroleum | | Oil & Gas Operator | Jul 1980 |
| 4317 | Signal, LLC Of Mississippi | | Oil & Gas Operator | Dec 2024 |
| 4318 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Feb 2026 |
| 4319 | Silver Hill Energy Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Feb 2026 |
| 4320 | Silver Oak Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2016 |
| 4321 | Silver Oak Operating, Inc. | Longview, TX 75601 | Oil & Gas Operator | Dec 2009 |
| 4322 | Silver Oak Operating, LLC | Longview, TX 75604 | Oil & Gas Operator | Feb 2026 |
| 4323 | Silver Pines Energy Corp. | Houston, TX 77005 | Oil & Gas Operator | Nov 2025 |
| 4324 | Simar Petroleum, LLC | | Oil Operator | Dec 2024 |
| 4325 | Simco Oil Company | | Oil Operator | Jul 1990 |
| 4326 | Simmons Oil Corp | | Oil Operator | Jan 1989 |
| 4327 | Simpson Well Service, Inc. | | Oil Operator | Dec 1996 |
| 4328 | Singer-Fleischaker Oil Co Inc | | Oil & Gas Operator | Jul 1987 |
| 4329 | Singer-Fleischaker Oil Op Co | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2002 |
| 4330 | Singer-Fleischaker,Dillon | | Oil & Gas Operator | Aug 1979 |
| 4331 | Single Barrel Oil And Gas LLC | Granbury, TX 76048 | Oil & Gas Operator | Feb 2026 |
| 4332 | Sitwell, Inc. | | Oil Operator | May 2022 |
| 4333 | Skelly Oil Co | | Oil & Gas Operator | Mar 2005 |
| 4334 | Skinner Energy Management, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Jan 2011 |
| 4335 | Sklar & Phillips - Harry Hurt | | Oil & Gas Operator | Jul 1986 |
| 4336 | Sklar & Phillips Oil Co. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2000 |
| 4337 | Sklar & Phillips Oil Co.-Entex | | Oil & Gas Operator | Aug 1978 |
| 4338 | Sklar &Phillips-Great Southern | | Oil & Gas Operator | Aug 1980 |
| 4339 | Sklar Exploration Company LLC | Shreveport, LA 71101 | Oil & Gas Operator | Feb 2026 |
| 4340 | Skrivanos Engineering, Inc. | Shreveport, LA 71164 | Oil & Gas Operator | Dec 2011 |
| 4341 | Skyhawk Energy, LLC | | Oil Operator | Dec 2024 |
| 4342 | Skyline Oil Company | Salt Lake City, UT 84111 | Oil & Gas Operator | Jan 1987 |
| 4343 | SKZ Inc. | | Oil Operator | Mar 1988 |
| 4344 | Slam Resources, Inc. | | Oil & Gas Operator | Apr 1994 |
| 4345 | Slapco - Emerald Exploration | | Gas Operator | Sep 1979 |
| 4346 | Sleeth And Brooks Oil Co. | | Oil Operator | Jul 1989 |
| 4347 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Feb 2026 |
| 4348 | Smackover Drilling Co. Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Jan 2025 |
| 4349 | Smal Energy Corp | Tyler, TX 75710 | Oil & Gas Operator | Oct 1995 |
| 4350 | SMC Oil & Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 4351 | Smith Oil And Gas Co | Wichita Falls, TX 76310 | Oil Operator | Dec 2010 |
| 4352 | Smith Operating And MGMT Co. | Shreveport, LA 71161 | Oil & Gas Operator | Jun 2023 |
| 4353 | Smith Operating-Germany Oil | | Oil & Gas Operator | Dec 1995 |
| 4354 | Smith Petroleum Company | Spring, TX 77389 | Oil & Gas Operator | Feb 2026 |
| 4355 | Smith Production Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 4356 | Smith-Wentworth | | Oil & Gas Operator | Sep 1983 |
| 4357 | Smith-Wentworth & Coquina | | Oil Operator | Jun 1983 |
| 4358 | Smith-Wentworth & Hughes & New | | Oil Operator | Jun 1983 |
| 4359 | SMK-La, Inc. | | Oil & Gas Operator | Sep 1999 |
| 4360 | SMR Natural Gas Ventures Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Jan 1999 |
| 4361 | SND Operating, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 4362 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 4363 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 4364 | Sohio Petr Co-Gulf Oil Corp | | Oil & Gas Operator | Dec 1979 |
| 4365 | Sohio Petroleum Co. | Casper, WY 82602 | Oil & Gas Operator | Apr 1986 |
| 4366 | Sohio Petroleum Co. Et Al | | Oil & Gas Operator | May 1979 |
| 4367 | Sola Oil Company, Inc. | | Oil & Gas Operator | Aug 1991 |
| 4368 | Sola Operating, LLC | Trout, LA 71371 | Oil Operator | Feb 2026 |
| 4369 | Solatex | | Oil & Gas Operator | Oct 1978 |
| 4370 | Solatex Resources, LTD | Houston, TX 77257 | Oil & Gas Operator | Feb 2026 |
| 4371 | Soldier Operating LLC | | Oil & Gas Operator | Dec 2024 |
| 4372 | Solid Rock Prod. | | Oil Operator | Nov 1994 |
| 4373 | Son-Dad Oil & Gas | | Oil & Gas Operator | Dec 1994 |
| 4374 | Sonat Exploration Co. | Houston, TX 77251 | Oil & Gas Operator | Dec 2021 |
| 4375 | Sonat Exploration Gom Inc. | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 4376 | Sonny King | | Oil & Gas Operator | Jan 2025 |
| 4377 | Sonny King Production | | Oil & Gas Operator | Jan 2025 |
| 4378 | Sonora Producing, Inc. | | Oil & Gas Operator | May 2006 |
| 4379 | Sonoran Energy Inc. | Addison, TX 75001 | Oil & Gas Operator | Feb 2026 |
| 4380 | Sooner Corp | | Oil & Gas Operator | Oct 1990 |
| 4381 | Sooner Resources, Inc. | | Oil & Gas Operator | Mar 1987 |
| 4382 | Sotrana-Texas Corp. | | Oil & Gas Operator | Oct 1984 |
| 4383 | Sound Resources Corporation | | Oil & Gas Operator | Dec 2003 |
| 4384 | Source Petroleum Inc. | San Antonio, TX 78265 | Oil & Gas Operator | Feb 2026 |
| 4385 | South Central Petroleum, Inc. | | Oil & Gas Operator | Dec 1988 |
| 4386 | South Coast Oil, Inc. | | Oil & Gas Operator | Jul 1989 |
| 4387 | South La. Production Co., Inc. | | Oil & Gas Operator | Jun 1982 |
| 4388 | South Leeville, LLC | Houston, TX 77069 | Oil & Gas Operator | Oct 2022 |
| 4389 | South Oak Production Company | | Oil & Gas Operator | Jun 2010 |
| 4390 | South River Operating, LLC | | Oil & Gas Operator | Dec 2016 |
| 4391 | Southampton Mineral Corp. | | Oil & Gas Operator | Aug 2005 |
| 4392 | Southco Oil And Gas Inc. | | Oil & Gas Operator | Nov 2000 |
| 4393 | Southeastern Public Service Co | | Oil & Gas Operator | Sep 1982 |
| 4394 | Southern Bay Operating, L.L.C. | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 4395 | Southern G Holdings, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2007 |
| 4396 | Southern Management Services | | Oil Operator | May 2017 |
| 4397 | Southern Natural Gas Co | Houston, TX 77001 | Oil & Gas Operator | Dec 2011 |
| 4398 | Southern Natural Gas Company LLC | | Oil & Gas Operator | Nov 2024 |
| 4399 | Southern Oil & Gas Company | | Oil & Gas Operator | Mar 2011 |
| 4400 | Southern Oil Of Louisiana LLC | Madisonville, LA 70447 | Oil & Gas Operator | Feb 2026 |