| 27301 | Silver Spike Energy Operating Of NM, LLC | Midland, TX 79701 | Oil Operator | Jul 2016 |
| 27302 | Silver Square Resources LLC | Cincinnati, OH 45219 | Oil Operator | Dec 2023 |
| 27303 | Silver Star Of Nevada Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Jan 2025 |
| 27304 | Silver Star Operating Co., LLC | Nada, TX 77460 | Gas Operator | Apr 2025 |
| 27305 | Silver Star Production Co | Moore, OK 73160-6202 | Oil & Gas Operator | Oct 2024 |
| 27306 | Silver Thread Oil & Gas, Inc. | | Oil & Gas Operator | Jul 2015 |
| 27307 | Silver Tusk Operating Co. LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2018 |
| 27308 | Silverado Oil Inc | Greeley, CO 80631 | Oil Operator | Apr 2000 |
| 27309 | Silverado Oil LTD | Ardmore, OK 73401 | Oil & Gas Operator | Jun 2003 |
| 27310 | Silverback Operating II, LLC | Oklahoma City, OK 73112 | Oil & Gas Operator | Jan 2025 |
| 27311 | Silverback Operating, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Oct 2016 |
| 27312 | Silverbacq LLC | | Oil & Gas Operator | Dec 2024 |
| 27313 | Silverbow Resources Oper, LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 27314 | Silverbrook Operating II LLC | Barker, TX 77413 | Oil Operator | Apr 2025 |
| 27315 | Silverbrook Operating, LLC | Barker, TX 77413 | Oil Operator | Apr 2025 |
| 27316 | Silverridge Corp | Van Buren, AR 72956 | Oil & Gas Operator | Mar 2015 |
| 27317 | Silvertin Farm Production LLC | Tulsa, OK 74137 | Oil & Gas Operator | Apr 2020 |
| 27318 | Simar Petroleum, LLC | | Oil Operator | Dec 2024 |
| 27319 | Simasko Producti | | Oil Operator | Dec 1986 |
| 27320 | Simasko Production Co | Denver, CO 80204 | Oil & Gas Operator | Nov 1997 |
| 27321 | Simata Energy | Midland, TX 79708 | Oil & Gas Operator | Apr 2025 |
| 27322 | Simata Energy, LLC | Midland, TX 79708 | Oil & Gas Operator | Apr 2025 |
| 27323 | Simco Oil Company | | Oil Operator | Jul 1990 |
| 27324 | Simco Oil, LLC | Lytle, TX 78052 | Oil Operator | Apr 2025 |
| 27325 | Simco Operating | Shawnee, OK 74804-2501 | Oil Operator | Jan 2013 |
| 27326 | Simco Petroleum | Cheyenne, WY 82003 | Oil & Gas Operator | Oct 2009 |
| 27327 | Simcoe LLC | Durango, CO 81301 | Oil & Gas Operator | Feb 2025 |
| 27328 | Simcoe Oil Company | Scottsdale, AZ 85258-2553 | Oil & Gas Operator | May 2020 |
| 27329 | Simme, Steven | Elma, NY 14052 | Gas Operator | Dec 2023 |
| 27330 | Simminger, Robert John Jr | | Oil Operator | Dec 2024 |
| 27331 | Simmons Donald M | Muskogee, OK 74401 | Oil & Gas Operator | May 2013 |
| 27332 | Simmons Engr & Consulting Co | Farmington, NM 87499 | Gas Operator | Feb 2002 |
| 27333 | Simmons Evelyn B-Per Represent | Edmond, OK 73083-3610 | Oil & Gas Operator | Aug 1996 |
| 27334 | Simmons Mack McCoy | Cement, OK 73017 | Oil Operator | Feb 2025 |
| 27335 | Simmons Oil Corporation | | Oil Operator | Jan 1989 |
| 27336 | Simmons Robert Z | | Oil Operator | Dec 1990 |
| 27337 | Simmons, Inc.* D. J. | | Oil & Gas Operator | May 2020 |
| 27338 | Simmons, L.B. Energy, Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 2000 |
| 27339 | Simmons, Stanley J. | Olney, TX 76374 | Oil & Gas Operator | Aug 1994 |
| 27340 | Simon Joseph W | Carney, OK 74832-0443 | Oil & Gas Operator | Dec 2016 |
| 27341 | Simon Of Bolivar Enterprises Inc | Cuba, NY 14727 | Oil & Gas Operator | Dec 2023 |
| 27342 | Simon Oil Company | Ardmore, OK 73401-1045 | Oil Operator | Jan 2025 |
| 27343 | Simon Oil LLC | Kaycee, WY 82639 | Oil Operator | Jan 2025 |
| 27344 | Simon Royce & Joyce | Tecumseh, OK 74873-7341 | Oil Operator | Jun 2018 |
| 27345 | Simon, W. D. Oil Co. | Kermit, TX 79745 | Oil & Gas Operator | Apr 2025 |
| 27346 | Simple Operating LLC | Cross Plains, TX 76443 | Oil Operator | Apr 2025 |
| 27347 | Simples Oil International, LLC | Los Angeles, CA 90067 | Oil & Gas Operator | Apr 2025 |
| 27348 | Simpson B T Jr | Orlando, FL 32806 | Oil & Gas Operator | Dec 1986 |
| 27349 | Simpson Bros. Oil Co. | Odessa, TX 79760 | Oil & Gas Operator | Jan 2001 |
| 27350 | Simpson Bros. Oil Co.-Odessa | Odessa, TX 79760 | Oil & Gas Operator | Jan 2001 |
| 27351 | Simpson Gary H | Albion, PA 16401-8008 | Gas Operator | Dec 2014 |
| 27352 | Simpson Oil & Land Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 27353 | Simpson Oil Company | Odessa, TX 79760 | Oil & Gas Operator | Oct 2004 |
| 27354 | Simpson Operating Services, LP | Ballinger, TX 76821 | Oil & Gas Operator | Apr 2025 |
| 27355 | Simpson Well Service, Inc. | | Oil Operator | Dec 1996 |
| 27356 | Simpson, A. E. | Electra, TX 76360 | Oil & Gas Operator | Dec 2006 |
| 27357 | Simray GP, LLC | Richardson, TX 75080 | Oil & Gas Operator | Dec 2015 |
| 27358 | Simray Oil & Gas, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Sep 2003 |
| 27359 | Simray Operating Corp. | Richardson, TX 75080 | Oil & Gas Operator | Mar 2009 |
| 27360 | Simray Production Company LP | Richland, TX 75080 | Oil & Gas Operator | Dec 2010 |
| 27361 | Sims, John S. | Lawn, TX 79530 | Oil & Gas Operator | Aug 2003 |
| 27362 | Sinclair Development, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 27363 | Sinclair Energy Corporation | Fort Worth, TX 76177 | Oil & Gas Operator | Apr 2025 |
| 27364 | Sinclair Exploration Company | Abilene, TX 79604 | Oil & Gas Operator | Nov 1998 |
| 27365 | Sinclair Oil & Gas Company | Salt Lake Cty, UT 84130 | Oil & Gas Operator | Apr 2025 |
| 27366 | Sinclair Oil Corporation | Salt Lake Cty, UT 84130 | Oil & Gas Operator | Aug 2006 |
| 27367 | Singer Fleischaker Oil Op. Co. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2002 |
| 27368 | Singer Joseph B Expl Co | Oklahoma City, OK 73118-7486 | Oil & Gas Operator | Mar 1993 |
| 27369 | Singer Oil Co LLC | Hennessey, OK 73742 | Oil & Gas Operator | Feb 2025 |
| 27370 | Singer Oil Company | Oklahoma City, OK 73148 | Oil & Gas Operator | Jan 2025 |
| 27371 | Singer-Fleischaker Oil Co Inc | | Oil & Gas Operator | Jul 1987 |
| 27372 | Singer-Fleischaker,Dillon | | Oil & Gas Operator | Aug 1979 |
| 27373 | Single Barrel Oil And Gas LLC | Granbury, TX 76048 | Oil & Gas Operator | Apr 2025 |
| 27374 | Singleton Investments, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2012 |
| 27375 | Singletree Resources Inc | | Oil & Gas Operator | Aug 2014 |
| 27376 | Sink Hole, Inc. | Levelland, TX 79336 | Oil & Gas Operator | Dec 2000 |
| 27377 | Sinkhole Solutions, LLC | Bowling Green, KY 42103 | Oil Operator | Dec 2021 |
| 27378 | Sinow, G. S. | Pampa, TX 79066 | Oil & Gas Operator | Oct 1995 |
| 27379 | Siosi Oil & Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2013 |
| 27380 | Sioux Gas Company | | Oil & Gas Operator | Dec 2021 |
| 27381 | Sip'S Oil & Gas Inc | Yukon, OK 73099 | Oil & Gas Operator | Apr 2025 |
| 27382 | Sipple Oil Co | Beattyville, KY 41311 | Oil Operator | Dec 2012 |
| 27383 | Sir Drake Oil And Gas Company | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Sep 2022 |
| 27384 | Sirius Energy Corp. | Abilene, TX 79606 | Oil Operator | Dec 2009 |
| 27385 | Siroco Operating Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2010 |
| 27386 | Siroky Oil Management | Pratt, KS 67124 | Oil & Gas Operator | Dec 2024 |
| 27387 | Sissom Oil | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |
| 27388 | Sissom Oil Field Services, LLC | Graham, TX 76450 | Oil Operator | Apr 2025 |
| 27389 | Sisters Of St. Joseph | Clarence, NY 14031 | Gas Operator | Dec 2023 |
| 27390 | Sisters Operating Company | Victoria, TX 77904 | Oil & Gas Operator | Nov 2010 |
| 27391 | Sitco Inc | Yukon, OK 73099 | Oil & Gas Operator | Jul 1995 |
| 27392 | Sitton, Ronnie Incorporated | Graford, TX 76449 | Oil & Gas Operator | Feb 2020 |
| 27393 | Situs Oil & Gas, LLC | Corpus Chrsti, TX 78414 | Oil Operator | Apr 2025 |
| 27394 | Sitwell, Inc. | | Oil Operator | May 2022 |
| 27395 | Sivad Energy No 4 | Akron, NY 14001 | Gas Operator | Dec 2023 |
| 27396 | Siven Crude Oil Company | Lomita, CA 90717 | Oil & Gas Operator | Apr 2018 |
| 27397 | Six "E" Trading Company | Henryetta, OK 74801 | Oil & Gas Operator | Sep 2020 |
| 27398 | Six Bar Oil LLC | Pine Haven, WY 82721 | Oil & Gas Operator | Feb 2025 |
| 27399 | Six C Oil | Bowie, TX 76230 | Oil & Gas Operator | Sep 2011 |
| 27400 | Six Oil Producers | Abilene, TX 79601 | Oil & Gas Operator | Sep 2002 |