| 27201 | Silverbow Resources Oper, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 27202 | Silverbrook Operating II LLC | Barker, TX 77413 | Oil & Gas Operator | Dec 2025 |
| 27203 | Silverbrook Operating, LLC | Barker, TX 77413 | Oil & Gas Operator | Dec 2025 |
| 27204 | Silverridge Corp | Van Buren, AR 72956 | Oil & Gas Operator | Mar 2015 |
| 27205 | Silvertin Farm Production LLC | Tulsa, OK 74137 | Oil & Gas Operator | Apr 2020 |
| 27206 | Simar Petroleum, LLC | | Oil Operator | Dec 2024 |
| 27207 | Simasko Producti | | Oil Operator | Dec 1986 |
| 27208 | Simasko Production Co | Denver, CO 80204 | Oil & Gas Operator | Nov 1997 |
| 27209 | Simata Energy | Midland, TX 79708 | Oil & Gas Operator | Dec 2025 |
| 27210 | Simata Energy, LLC | Midland, TX 79708 | Oil & Gas Operator | Dec 2025 |
| 27211 | Simco Oil Company | | Oil Operator | Jul 1990 |
| 27212 | Simco Oil, LLC | Lytle, TX 78052 | Oil Operator | Dec 2025 |
| 27213 | Simco Operating | Shawnee, OK 74804-2501 | Oil Operator | Jan 2013 |
| 27214 | Simco Petroleum | Cheyenne, WY 82003 | Oil & Gas Operator | Oct 2009 |
| 27215 | Simcoe LLC | Durango, CO 81301 | Oil & Gas Operator | Nov 2025 |
| 27216 | Simcoe Oil Company | Scottsdale, AZ 85258-2553 | Oil & Gas Operator | May 2020 |
| 27217 | Simme, Steven | Elma, NY 14052 | Gas Operator | Dec 2024 |
| 27218 | Simminger, Robert John Jr | | Oil Operator | May 2025 |
| 27219 | Simmons Donald M | Muskogee, OK 74401 | Oil & Gas Operator | May 2013 |
| 27220 | Simmons Engr & Consulting Co | Farmington, NM 87499 | Gas Operator | Feb 2002 |
| 27221 | Simmons Evelyn B-Per Represent | Edmond, OK 73083-3610 | Oil & Gas Operator | Aug 1996 |
| 27222 | Simmons Mack McCoy | Cement, OK 73017 | Oil Operator | Feb 2025 |
| 27223 | Simmons Oil Corp | | Oil Operator | Jan 1989 |
| 27224 | Simmons Robert Z | | Oil Operator | Dec 1990 |
| 27225 | Simmons, Inc.* D. J. | | Oil & Gas Operator | May 2020 |
| 27226 | Simmons, L.B. Energy, Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 2000 |
| 27227 | Simmons, Stanley J. | Olney, TX 76374 | Oil & Gas Operator | Aug 1994 |
| 27228 | Simon Joseph W | Carney, OK 74832-0443 | Oil & Gas Operator | Dec 2016 |
| 27229 | Simon Of Bolivar Enterprises Inc | Cuba, NY 14727 | Oil & Gas Operator | Dec 2024 |
| 27230 | Simon Oil Company | Ardmore, OK 73401 | Oil Operator | Jan 2025 |
| 27231 | Simon Oil LLC | Kaycee, WY 82639 | Oil Operator | Aug 2025 |
| 27232 | Simon Royce & Joyce | Tecumseh, OK 74873-7341 | Oil Operator | Jun 2018 |
| 27233 | Simon, W. D. Oil Co. | Kermit, TX 79745 | Oil & Gas Operator | Dec 2025 |
| 27234 | Simple Operating LLC | Cross Plains, TX 76443 | Oil Operator | Dec 2025 |
| 27235 | Simples Oil International, LLC | Los Angeles, CA 90067 | Oil & Gas Operator | Dec 2025 |
| 27236 | Simpson B T Jr | Orlando, FL 32806 | Oil & Gas Operator | Dec 1986 |
| 27237 | Simpson Bros. Oil Co. | Odessa, TX 79760 | Oil & Gas Operator | Jan 2001 |
| 27238 | Simpson Bros. Oil Co.-Odessa | Odessa, TX 79760 | Oil & Gas Operator | Jan 2001 |
| 27239 | Simpson Gary H | Albion, PA 16401-8008 | Gas Operator | Dec 2014 |
| 27240 | Simpson Oil & Land Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 27241 | Simpson Oil Company | Odessa, TX 79760 | Oil & Gas Operator | Oct 2004 |
| 27242 | Simpson Operating Services, LP | Ballinger, TX 76821 | Oil & Gas Operator | Dec 2025 |
| 27243 | Simpson Well Service, Inc. | | Oil Operator | Dec 1996 |
| 27244 | Simpson, A. E. | Electra, TX 76360 | Oil & Gas Operator | Dec 2006 |
| 27245 | Simray GP, LLC | Richardson, TX 75080 | Oil & Gas Operator | Dec 2015 |
| 27246 | Simray Oil & Gas, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Sep 2003 |
| 27247 | Simray Operating Corp. | Richardson, TX 75080 | Oil & Gas Operator | Mar 2009 |
| 27248 | Simray Production Company LP | Richland, TX 75080 | Oil & Gas Operator | Dec 2010 |
| 27249 | Sims, John S. | Lawn, TX 79530 | Oil & Gas Operator | Aug 2003 |
| 27250 | Sinclair Development, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 27251 | Sinclair Energy Corporation | Fort Worth, TX 76177 | Oil & Gas Operator | Dec 2025 |
| 27252 | Sinclair Exploration Company | Abilene, TX 79604 | Oil & Gas Operator | Nov 1998 |
| 27253 | Sinclair Oil & Gas Company | Salt Lake Cty, UT 84130 | Oil & Gas Operator | Dec 2025 |
| 27254 | Sinclair Oil Corporation | Salt Lake Cty, UT 84130 | Oil & Gas Operator | Aug 2006 |
| 27255 | Singer Joseph B Expl Co | Oklahoma City, OK 73118-7486 | Oil & Gas Operator | Mar 1993 |
| 27256 | Singer Oil Co LLC | Hennessey, OK 73742 | Oil & Gas Operator | Oct 2025 |
| 27257 | Singer Oil Company | Oklahoma City, OK 73148 | Oil & Gas Operator | Sep 2025 |
| 27258 | Singer-Fleischaker Oil Co Inc | | Oil & Gas Operator | Jul 1987 |
| 27259 | Singer-Fleischaker Oil Op Co | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2002 |
| 27260 | Singer-Fleischaker,Dillon | | Oil & Gas Operator | Aug 1979 |
| 27261 | Single Barrel Oil And Gas LLC | Granbury, TX 76048 | Oil & Gas Operator | Dec 2025 |
| 27262 | Singleton Investments, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2012 |
| 27263 | Singletree Resources, Inc. | | Oil Operator | Aug 2014 |
| 27264 | Sink Hole, Inc. | Levelland, TX 79336 | Oil & Gas Operator | Dec 2000 |
| 27265 | Sinkhole Solutions, LLC | Bowling Green, KY 42103 | Oil Operator | Dec 2021 |
| 27266 | Sinow, G. S. | Pampa, TX 79066 | Oil & Gas Operator | Oct 1995 |
| 27267 | Siosi Oil & Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2013 |
| 27268 | Sip'S Oil & Gas Inc | Yukon, OK 73099 | Oil & Gas Operator | Dec 2025 |
| 27269 | Sipple Oil Co | Beattyville, KY 41311 | Oil Operator | Dec 2012 |
| 27270 | Sirius Energy Corp. | Abilene, TX 79606 | Oil Operator | Dec 2009 |
| 27271 | Siroco Operating Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2010 |
| 27272 | Siroky Oil Management | Pratt, KS 67124 | Oil & Gas Operator | Jun 2025 |
| 27273 | Sissom Oil | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |
| 27274 | Sissom Oil Field Services, LLC | Graham, TX 76450 | Oil Operator | Dec 2025 |
| 27275 | Sisters Of St. Joseph | Clarence, NY 14031 | Gas Operator | Dec 2024 |
| 27276 | Sisters Operating Company | Victoria, TX 77904 | Oil & Gas Operator | Nov 2010 |
| 27277 | Sitco Inc | Yukon, OK 73099 | Oil & Gas Operator | Jul 1995 |
| 27278 | Sitton, Ronnie Incorporated | Graford, TX 76449 | Oil & Gas Operator | Feb 2020 |
| 27279 | Situs Oil & Gas, LLC | Corpus Chrsti, TX 78414 | Oil Operator | Dec 2025 |
| 27280 | Sitwell, Inc. | | Oil Operator | May 2022 |
| 27281 | Sivad Energy No 4 | Akron, NY 14001 | Gas Operator | Dec 2024 |
| 27282 | Six "E" Trading Company | Henryetta, OK 74801 | Oil & Gas Operator | Sep 2020 |
| 27283 | Six Bar Oil LLC | Pine Haven, WY 82721 | Oil & Gas Operator | Nov 2025 |
| 27284 | Six C Oil | Bowie, TX 76230 | Oil & Gas Operator | Sep 2011 |
| 27285 | Six Oil Producers | Abilene, TX 79601 | Oil & Gas Operator | Sep 2002 |
| 27286 | Six-D Exploration, LLC | Hutchinson, KS 67502 | Oil Operator | Apr 2025 |
| 27287 | Six-S Properties, Inc. | Austin, TX 78767 | Oil & Gas Operator | Dec 2025 |
| 27288 | Sixess Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 27289 | Sizemore, James | Hardin, TX 77561 | Oil & Gas Operator | Jun 2003 |
| 27290 | SJ Energy, LLC | Englewood, CO 80112 | Oil & Gas Operator | Feb 2019 |
| 27291 | SJ Ok Oil Company | Dallas, TX 75206-9925 | Oil & Gas Operator | Sep 2025 |
| 27292 | SJM Inc | Tulsa, OK 74133-1757 | Gas Operator | Apr 2006 |
| 27293 | SJM Oil LLC | | Oil & Gas Operator | Dec 2009 |
| 27294 | Sju Holdings LLC | Norman, OK 73072 | Oil & Gas Operator | Sep 2025 |
| 27295 | SK Nemaha LLC | Houston, TX 77079-1222 | Oil & Gas Operator | Feb 2021 |
| 27296 | SK Opr Inc | Cabot, PA 16023-1250 | Gas Operator | Dec 2024 |
| 27297 | SK Plymouth LLC | Houston, TX 77079-1222 | Oil & Gas Operator | Sep 2025 |
| 27298 | Skaar, K. M. Oil & Gas Co. | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 27299 | Skeet Oil Production LLC | Grady, OK 73569 | Oil Operator | Sep 2025 |
| 27300 | Skeeter Oil L.L.C. | Big Spring, TX 79720 | Oil Operator | Dec 2025 |