| 26301 | Simon Royce & Joyce | Tecumseh, OK 74873-7341 | Oil Operator | Jun 2018 |
| 26302 | Simon, W. D. Oil Co. | Kermit, TX 79745 | Oil & Gas Operator | Jun 2026 |
| 26303 | Simple Operating LLC | Cross Plains, TX 76443 | Oil Operator | Jun 2026 |
| 26304 | Simpson B T Jr | Orlando, FL 32806 | Oil & Gas Operator | Dec 1986 |
| 26305 | Simpson Bros. Oil Co. | Odessa, TX 79760 | Oil & Gas Operator | Jan 2001 |
| 26306 | Simpson Bros. Oil Co.-Odessa | Odessa, TX 79760 | Oil & Gas Operator | Jan 2001 |
| 26307 | Simpson Gary H | Albion, PA 16401-8008 | Gas Operator | Dec 2014 |
| 26308 | Simpson Oil & Land Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2026 |
| 26309 | Simpson Oil Company | Odessa, TX 79760 | Oil & Gas Operator | Oct 2004 |
| 26310 | Simpson Operating Services, LP | Ballinger, TX 76821 | Oil & Gas Operator | Jun 2026 |
| 26311 | Simpson Well Service, Inc. | | Oil Operator | Dec 1996 |
| 26312 | Simpson, A. E. | Electra, TX 76360 | Oil & Gas Operator | Dec 2006 |
| 26313 | Simray GP, LLC | Richardson, TX 75080 | Oil & Gas Operator | Dec 2015 |
| 26314 | Simray Oil & Gas, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Sep 2003 |
| 26315 | Simray Operating Corp. | Richardson, TX 75080 | Oil & Gas Operator | Mar 2009 |
| 26316 | Simray Production Company LP | Richland, TX 75080 | Oil & Gas Operator | Dec 2010 |
| 26317 | Sims, John S. | Lawn, TX 79530 | Oil & Gas Operator | Aug 2003 |
| 26318 | Sinclair Development, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2026 |
| 26319 | Sinclair Energy Corporation | Fort Worth, TX 76177 | Oil & Gas Operator | Jun 2026 |
| 26320 | Sinclair Exploration Company | Abilene, TX 79604 | Oil & Gas Operator | Nov 1998 |
| 26321 | Sinclair Oil & Gas Company | Salt Lake Cty, UT 84130 | Oil & Gas Operator | Jun 2026 |
| 26322 | Sinclair Oil Corporation | Salt Lake Cty, UT 84130 | Oil & Gas Operator | Aug 2006 |
| 26323 | Singer Joseph B Expl Co | Oklahoma City, OK 73118-7486 | Oil & Gas Operator | Mar 1993 |
| 26324 | Singer Oil Co LLC | Hennessey, OK 73742 | Oil & Gas Operator | Mar 2026 |
| 26325 | Singer Oil Company | Oklahoma City, OK 73148 | Oil & Gas Operator | Feb 2026 |
| 26326 | Singer-Fleischaker Oil Co Inc | | Oil & Gas Operator | Jul 1987 |
| 26327 | Singer-Fleischaker Oil Op Co | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2002 |
| 26328 | Singer-Fleischaker,Dillon | | Oil & Gas Operator | Aug 1979 |
| 26329 | Single Barrel Oil And Gas LLC | Granbury, TX 76048 | Oil & Gas Operator | Jun 2026 |
| 26330 | Singleton Investments, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2012 |
| 26331 | Singletree Resources, Inc. | | Oil Operator | Aug 2014 |
| 26332 | Sink Hole, Inc. | Levelland, TX 79336 | Oil & Gas Operator | Dec 2000 |
| 26333 | Sinkhole Solutions, LLC | Bowling Green, KY 42103 | Oil Operator | Dec 2021 |
| 26334 | Sinow, G. S. | Pampa, TX 79066 | Oil & Gas Operator | Oct 1995 |
| 26335 | Siosi Oil & Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2013 |
| 26336 | Sip'S Oil & Gas Inc | Yukon, OK 73099 | Oil & Gas Operator | Jun 2026 |
| 26337 | Sipple Oil Co | Beattyville, KY 41311 | Oil Operator | Dec 2012 |
| 26338 | Sirius Energy Corp. | Abilene, TX 79606 | Oil Operator | Dec 2009 |
| 26339 | Siroco Operating Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2010 |
| 26340 | Siroky Oil Management | Pratt, KS 67124 | Oil & Gas Operator | Feb 2026 |
| 26341 | Sissom Oil | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |
| 26342 | Sissom Oil Field Services, LLC | Graham, TX 76450 | Oil Operator | Jun 2026 |
| 26343 | Sisters Of St. Joseph | Clarence, NY 14031 | Gas Operator | Dec 2024 |
| 26344 | Sisters Operating Company | Victoria, TX 77904 | Oil & Gas Operator | Nov 2010 |
| 26345 | Sitco Inc | Yukon, OK 73099 | Oil & Gas Operator | Jul 1995 |
| 26346 | Sitton, Ronnie Incorporated | Graford, TX 76449 | Oil & Gas Operator | Feb 2020 |
| 26347 | Situs Oil & Gas, LLC | Corpus Chrsti, TX 78414 | Oil Operator | Jun 2026 |
| 26348 | Sitwell, Inc. | | Oil Operator | May 2022 |
| 26349 | Sivad Energy No 4 | Akron, NY 14001 | Gas Operator | Dec 2024 |
| 26350 | Six "E" Trading Company | Henryetta, OK 74801 | Oil & Gas Operator | Sep 2020 |
| 26351 | Six Bar Oil LLC | Pine Haven, WY 82721 | Oil & Gas Operator | Apr 2026 |
| 26352 | Six Oil Producers | Abilene, TX 79601 | Oil & Gas Operator | Sep 2002 |
| 26353 | Six-D Exploration, LLC | Hutchinson, KS 67502 | Oil Operator | Apr 2025 |
| 26354 | Six-S Properties, Inc. | Austin, TX 78767 | Oil & Gas Operator | Jun 2026 |
| 26355 | Sixess Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | Jun 2026 |
| 26356 | Sizemore, James | Hardin, TX 77561 | Oil & Gas Operator | Jun 2003 |
| 26357 | SJ Energy, LLC | Englewood, CO 80112 | Oil & Gas Operator | Feb 2019 |
| 26358 | SJ Ok Oil Company | Dallas, TX 75206-9925 | Oil & Gas Operator | Oct 2025 |
| 26359 | SJM Inc | Tulsa, OK 74133-1757 | Gas Operator | Apr 2006 |
| 26360 | SJM Oil LLC | | Oil & Gas Operator | Dec 2009 |
| 26361 | Sju Holdings LLC | Norman, OK 73072 | Oil & Gas Operator | Feb 2026 |
| 26362 | SK Nemaha LLC | Houston, TX 77079-1222 | Oil & Gas Operator | Feb 2021 |
| 26363 | SK Opr Inc | Mars, PA 16046-3811 | Gas Operator | Dec 2025 |
| 26364 | SK Plymouth LLC | Houston, TX 77079-1222 | Oil & Gas Operator | Feb 2026 |
| 26365 | Skaar, K. M. Oil & Gas Co. | Midland, TX 79710 | Oil & Gas Operator | Jun 2026 |
| 26366 | Skeet Oil Production LLC | Grady, OK 73569 | Oil Operator | Mar 2026 |
| 26367 | Skeeter Oil L.L.C. | Big Spring, TX 79720 | Oil Operator | Jun 2026 |
| 26368 | Skelly Oil Co | | Oil & Gas Operator | Mar 2005 |
| 26369 | Skelton Operating Co., Inc. | | Oil & Gas Operator | Aug 1980 |
| 26370 | Skelton, D.W. | | Oil Operator | Dec 1952 |
| 26371 | Skewes Operating Company | Bluefield, VA 24605 | Oil & Gas Operator | Jun 2026 |
| 26372 | Ski Production, LLC | Muenster, TX 76252 | Oil Operator | Jun 2026 |
| 26373 | Skidgel Enterprises Inc | Rawlins, WY 82301 | Oil & Gas Operator | Sep 2018 |
| 26374 | Skidmore Energy,Inc. | Salado, TX 76571 | Oil & Gas Operator | Jun 1999 |
| 26375 | Skidmore Exploration, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Jul 1997 |
| 26376 | Skidmore, James E. | Nocona, TX 76255 | Oil & Gas Operator | Nov 2008 |
| 26377 | Skinner Cattle, Inc. | Nocona, TX 76255 | Oil Operator | Jun 2026 |
| 26378 | Skinner Corporation | | Oil Operator | Apr 1985 |
| 26379 | Skinner Energy Management, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Jan 2011 |
| 26380 | Skinner Oil & Gas LLC | Gillette, WY 82717 | Oil & Gas Operator | Jan 2024 |
| 26381 | Skinner'S Resources & Expl Inc | | Oil & Gas Operator | Jun 2007 |
| 26382 | Skinner, Robert V. | Spearman, TX 79081 | Oil & Gas Operator | Aug 2008 |
| 26383 | Skinner, W. E. | Wichita Falls, TX 76301 | Oil & Gas Operator | Jun 2026 |
| 26384 | Skinnergy Co. | Spearman, TX 79081 | Oil & Gas Operator | Jun 2026 |
| 26385 | Skipworth, Joseph D | | Oil Operator | Dec 2021 |
| 26386 | SKKM Oil Company | | Oil Operator | Dec 1992 |
| 26387 | Sklar | | Oil & Gas Operator | Dec 2024 |
| 26388 | Sklar & Phillips - Harry Hurt | | Oil & Gas Operator | Jul 1986 |
| 26389 | Sklar & Phillips Oil Co. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2000 |
| 26390 | Sklar & Phillips Oil Co.-Entex | | Oil & Gas Operator | Aug 1978 |
| 26391 | Sklar &Phillips-Great Southern | | Oil & Gas Operator | Aug 1980 |
| 26392 | Sklar Exploration Company LLC | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2026 |
| 26393 | Sklar-Tex L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2001 |
| 26394 | Skora, James B. | Lawtons, NY 14091 | Gas Operator | Dec 2024 |
| 26395 | Skrivanos Engineering, Inc. | Shreveport, LA 71164 | Oil & Gas Operator | Dec 2011 |
| 26396 | Skrzynski, Thomas J. | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 26397 | SKS Oil | Olney, TX 76374 | Oil & Gas Operator | Jun 2026 |
| 26398 | Skubis, Daniel J. | Fredonia, NY 14063 | Gas Operator | Dec 2024 |
| 26399 | Skull Creek A LLC | Douglas, WY 82633 | Oil & Gas Operator | Feb 2026 |
| 26400 | Skull Creek Oil & Gas LLC | | Oil Operator | Jan 2026 |