| 27201 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 27202 | St. Paul Oil And Gas Corp. | | Oil & Gas Operator | Aug 1991 |
| 27203 | Sta-Kel Incorporated | Graham, TX 76450 | Oil & Gas Operator | Dec 2000 |
| 27204 | Staab Alan R | Tulsa, OK 74114-4213 | Oil & Gas Operator | Sep 2010 |
| 27205 | Staab Energy & Leasing | | Oil Operator | Sep 2025 |
| 27206 | Staab Oil Co., A General Partnership | Hays, KS 67601 | Oil Operator | May 2026 |
| 27207 | Staats & Martin | | Oil Operator | Aug 2013 |
| 27208 | Staats, William N | | Oil & Gas Operator | Jun 2026 |
| 27209 | Stablerock Energy L.L.C. | Oklahoma City, OK 73106 | Oil & Gas Operator | Sep 2026 |
| 27210 | Stach Enterprises LLC | Nashport, OH 43830 | Oil & Gas Operator | Dec 2021 |
| 27211 | Stacha, Eddy A. | Rice, TX 75155 | Oil & Gas Operator | Sep 2026 |
| 27212 | Stachler William L | Danville, OH 43014 | Oil & Gas Operator | Dec 1989 |
| 27213 | Stack Production | Dewey, OK 74029 | Oil & Gas Operator | Mar 2002 |
| 27214 | Stackhouse Construction Inc | Orwell, OH 44076 | Oil & Gas Operator | Dec 2025 |
| 27215 | Stacy Operating LLC | Cushing, OK 74023 | Oil & Gas Operator | Jul 2026 |
| 27216 | Stacy Reamy | Purdon, TX 76679 | Oil Operator | Sep 2026 |
| 27217 | Stafford, A C | | Oil Operator | Dec 2003 |
| 27218 | Stag Oil Producers Inc | Midland, TX 79701 | Oil & Gas Operator | Jan 1998 |
| 27219 | Stagecoach Pipeline & Storage Company LLC | | Gas Operator | Dec 2005 |
| 27220 | Stagg Investment Group, Inc. | Midland, TX 79701 | Oil Operator | May 2013 |
| 27221 | Staggered T Oil LLC | Quanah, TX 79252 | Oil Operator | Sep 2026 |
| 27222 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2026 |
| 27223 | Staghorn Petroleum II LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Jul 2026 |
| 27224 | Staghorn Petroleum LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Jun 2026 |
| 27225 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 27226 | Stahl Petroleum Co. | Amarillo, TX 79118 | Oil & Gas Operator | Aug 2003 |
| 27227 | Stal Oil Production, L.L.C. | Argyle, TX 76226 | Oil Operator | Sep 2026 |
| 27228 | Stalcup Oil Comp | | Oil Operator | Dec 1992 |
| 27229 | Stalcup Oil Company | | Oil Operator | Oct 2009 |
| 27230 | Staley Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2000 |
| 27231 | Staley Operating Co. | Midland, TX 79702 | Oil & Gas Operator | Jan 2022 |
| 27232 | Staley, Jack C. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2000 |
| 27233 | Stalica, Donald E. | Pavilion, NY 14525 | Gas Operator | Dec 2025 |
| 27234 | Stalking Horse Energy, Limited Liability Company | Houston, TX 77062 | Oil & Gas Operator | Sep 2026 |
| 27235 | Stalking Horse Energy, LLC | Houston, TX 77062 | Oil Operator | May 2026 |
| 27236 | Stallings Eugene | | Oil Operator | Jul 1994 |
| 27237 | Stallion Energy LLC | Houston, TX 77090 | Oil & Gas Operator | Oct 2009 |
| 27238 | Stallion Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2017 |
| 27239 | Stallion Oil Company | Lafayette, LA 70505 | Oil & Gas Operator | Jun 2004 |
| 27240 | Stallion Oil Corporation | | Oil & Gas Operator | Nov 1987 |
| 27241 | Stallion Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2026 |
| 27242 | Stalnaker Energy Corporation | Glenville, WV 263510000 | Oil & Gas Operator | Dec 2021 |
| 27243 | Stalnaker Oil Company | Maud, OK 74854-0295 | Oil Operator | May 2017 |
| 27244 | Stalnaker, William K | | Oil & Gas Operator | Dec 2008 |
| 27245 | Stalwart Energy Co | Tulsa, OK 74103-3518 | Oil & Gas Operator | Apr 2014 |
| 27246 | Stamic Oil LLC | Duncan, OK 73534-1898 | Oil & Gas Operator | Oct 2021 |
| 27247 | Stampede Energy Corp. | Canada, 00100 | Oil & Gas Operator | Mar 2000 |
| 27248 | Stamper Operating Co., Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Sep 2026 |
| 27249 | Stanco Petroleum Inc | Kimball, NE 69145 | Oil & Gas Operator | Jul 1999 |
| 27250 | Standard Alaska Production Company | | Oil & Gas Operator | Dec 1987 |
| 27251 | Standard Oil Co Of Calif | | Oil & Gas Operator | Dec 1983 |
| 27252 | Standard Oil Co Of WV | Walton, WV 25286 | Oil & Gas Operator | Dec 2025 |
| 27253 | Standard Oil Company, Inc. | Parkesburg, WV 26103 | Oil & Gas Operator | Mar 2022 |
| 27254 | Standard Oil Of Kentucky, Inc | | Oil Operator | Dec 2024 |
| 27255 | Standard Oil Tools, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Sep 2026 |
| 27256 | Standard Operating Company | Wichita, KS 67205 | Oil & Gas Operator | Dec 2019 |
| 27257 | Standard Operating Company, LLC | | Oil & Gas Operator | May 2022 |
| 27258 | Standard Operating Inc | | Oil Operator | Jun 1986 |
| 27259 | Standard Production | | Oil Operator | Oct 1997 |
| 27260 | Standard Resources Corp. | Houston, TX 77063 | Oil & Gas Operator | Sep 2026 |
| 27261 | Standard Silver Corp | Richardson, TX 750801946 | Gas Operator | Aug 2024 |
| 27262 | Standby Farms | Louisville, OH 44641 | Oil & Gas Operator | Dec 2025 |
| 27263 | Standing Bear Petroleum Inc. | | Oil & Gas Operator | Dec 2005 |
| 27264 | Standley* Robert K Dba Otis Energy | | Oil Operator | Jan 2023 |
| 27265 | Stanlee Oil LLC | | Oil Operator | Apr 2026 |
| 27266 | Stanoco Oil Co | Central City, KY 42330 | Oil & Gas Operator | Dec 2024 |
| 27267 | Stanolind Operating Corp. | Midland, TX 79701 | Oil & Gas Operator | Apr 2008 |
| 27268 | Stanolind Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2021 |
| 27269 | Stanolind Operating LLC Dba Stanolind NM LLC | Midland, TX 79701 | Oil & Gas Operator | Dec 2014 |
| 27270 | Stanolind Permian LLC | Midland, TX 79710 | Oil & Gas Operator | Sep 2026 |
| 27271 | Stanolind Production LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2020 |
| 27272 | Stanolind SJ LLC | Midland, TX 79701 | Oil & Gas Operator | Nov 2018 |
| 27273 | Stanotex, LLC | Katy, TX 77494 | Oil & Gas Operator | Sep 2026 |
| 27274 | Stanton Leo F & Leo H | Wynona, OK 74084 | Oil & Gas Operator | Jun 1999 |
| 27275 | Stanton Mineral Development Inc | Austin, TX 78759 | Oil & Gas Operator | Sep 2026 |
| 27276 | Stanton, Joni R | | Oil Operator | Jun 2026 |
| 27277 | Staples, James W. | Tuleta, TX 78162 | Oil & Gas Operator | Sep 2014 |
| 27278 | Staples, James W. Prod. Co. | Tuleta, TX 78162 | Oil & Gas Operator | Sep 2026 |
| 27279 | Staples, Tommy Oil Co. | Pettus, TX 78146 | Oil & Gas Operator | Mar 2008 |
| 27280 | Star Acquisition VII, LLC | Littleton, CO 801249743 | Oil & Gas Operator | Jul 2007 |
| 27281 | Star Energy Inc | Dayton, PA 16222-4325 | Oil & Gas Operator | Dec 2025 |
| 27282 | Star Expl Corp | Columbus, OH 43229 | Oil & Gas Operator | Dec 1988 |
| 27283 | Star Falcon Oil Co. | | Oil Operator | Feb 1986 |
| 27284 | Star Of Texas Energy SRVS, Inc. | Austin, TX 78702 | Oil & Gas Operator | Sep 2026 |
| 27285 | Star Oil & Gas | Ben Bolt, TX 78342 | Oil & Gas Operator | Sep 2026 |
| 27286 | Star Oil & Gas, Inc. | | Oil & Gas Operator | Sep 1995 |
| 27287 | Star Oil And Gas LTD | Racine, OH 45771 | Oil & Gas Operator | Dec 2024 |
| 27288 | Star Oil Company | Wichita, KS 67230 | Oil & Gas Operator | Mar 2025 |
| 27289 | Star Oil Operating Company, LLC | Bowling Green, KY 42101 | Oil & Gas Operator | Aug 2026 |
| 27290 | Star One Energy, Inc. | Fort Worth, TX 76163 | Oil & Gas Operator | May 2012 |
| 27291 | Star Production, Inc. | Dallas, TX 75360 | Oil & Gas Operator | Sep 2026 |
| 27292 | Star Resources LLC | Englewood, CO 80155-5185 | Oil & Gas Operator | Dec 2013 |
| 27293 | Star Resources, LTD. | Wichita, KS 67202 | Oil Operator | Nov 2002 |
| 27294 | Star-Jet Co. | Gainesville, TX 76240 | Oil Operator | Sep 2026 |
| 27295 | Starbrite Energy LLC | Enid, OK 73702-0549 | Oil & Gas Operator | Oct 2018 |
| 27296 | Starco Exploration, Inc. | Dallas, TX 75360 | Oil & Gas Operator | Sep 2026 |
| 27297 | Stardust Leasing, Inc. | Richmond, TX 77469 | Oil & Gas Operator | Jul 1999 |
| 27298 | Stargas Co | Tulsa, OK 74136-5407 | Oil & Gas Operator | Aug 2013 |
| 27299 | Stark Oil Properties | Asher, OK 74826 | Oil & Gas Operator | Jan 1997 |
| 27300 | Stark Petroleum | Tuleta, TX 78162 | Oil & Gas Operator | Sep 2026 |