| 26201 | Sierra Lima Oil & Gas, LLC | Abilene, TX 79604 | Oil & Gas Operator | Nov 2025 |
| 26202 | Sierra Madre LLC | Greensburg, KS 67054 | Oil & Gas Operator | May 2015 |
| 26203 | Sierra Madre Natural Res., LLC | Dallas, TX 75225 | Oil & Gas Operator | Dec 2016 |
| 26204 | Sierra Madre Oil & Gas, LLC | Midland, TX 79701 | Oil & Gas Operator | Mar 2026 |
| 26205 | Sierra Minerals, Inc. | Rockdale, TX 76567 | Oil & Gas Operator | Jun 2026 |
| 26206 | Sierra Oil Company | Fort Worth, TX 76106 | Oil & Gas Operator | Jun 2026 |
| 26207 | Sierra Petroleum | | Oil & Gas Operator | Sep 1986 |
| 26208 | Sierra Production Company | | Oil & Gas Operator | May 1986 |
| 26209 | Sierra Reserve Company | | Oil Operator | Dec 1985 |
| 26210 | Sierra Resources, Inc. | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2026 |
| 26211 | Sierra Resources, LLC | Houston, TX 77219 | Oil & Gas Operator | Aug 2021 |
| 26212 | Sierra Trading Corporation | | Oil & Gas Operator | Sep 1978 |
| 26213 | Siete Oil And Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 26214 | Sigma Corporation | Charleston, WV 25301-2644 | Gas Operator | Dec 2021 |
| 26215 | Sigma Energy & Explor., Co LLC | Ozona, TX 76943 | Oil & Gas Operator | Feb 2010 |
| 26216 | Sigma Energy, LLC | | Oil Operator | Jan 2025 |
| 26217 | Sigma Oper & Develop Co., Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2026 |
| 26218 | Sigmon Production Company, Inc. | Longview, TX 75608 | Oil & Gas Operator | Dec 2013 |
| 26219 | Signal Hill Company LLC | Cody, WY 82414 | Oil & Gas Operator | Dec 2024 |
| 26220 | Signal Hill Expl & Pet Inc | Duncan, OK 73533 | Oil & Gas Operator | Mar 2015 |
| 26221 | Signal Hill Operating LLC | | Oil & Gas Operator | Apr 2026 |
| 26222 | Signal Hill Petroleum Inc. | | Oil & Gas Operator | Feb 2026 |
| 26223 | Signal Oil And Gas Company | Colleyville, TX 76034 | Oil & Gas Operator | Jun 2026 |
| 26224 | Signal Oil Company, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2026 |
| 26225 | Signal Operating L.L.C. | | Oil Operator | Jan 2025 |
| 26226 | Signal Petroleum | | Oil & Gas Operator | Jul 1980 |
| 26227 | Signal, LLC | | Oil & Gas Operator | Mar 2026 |
| 26228 | Signal, LLC Of Mississippi | | Oil & Gas Operator | Dec 2024 |
| 26229 | Signature Exploration Inc. | Shawnee, OK 74804-4130 | Oil & Gas Operator | Mar 2015 |
| 26230 | Sikes Oil Company Inc | Velma, OK 73091-0759 | Oil & Gas Operator | Jan 2014 |
| 26231 | Sikes Operating, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Jun 2003 |
| 26232 | Sikes, Arlas M. | Brownwood, TX 76801 | Oil & Gas Operator | May 2000 |
| 26233 | Silberman A & M Oil | Oklahoma City, OK 73122-3096 | Oil & Gas Operator | Apr 2014 |
| 26234 | Silent Stone Energy LLC | | Oil & Gas Operator | Feb 2026 |
| 26235 | Silhan, Terry | Marion, KS 66861 | Oil & Gas Operator | Dec 2009 |
| 26236 | Silleman, Drew C. | Cattaraugus, NY 14719 | Gas Operator | Dec 2024 |
| 26237 | Siltstone Resources Op II, LLC | Wilmington, DE 19801 | Oil & Gas Operator | Jun 2026 |
| 26238 | Silvco Energy, LLC | | Oil Operator | Apr 2014 |
| 26239 | Silver Anchor Resources LLC | Azle, TX 76020 | Oil & Gas Operator | Jun 2026 |
| 26240 | Silver Creek Oil | Merkel, TX 79536 | Oil & Gas Operator | Aug 2003 |
| 26241 | Silver Creek Oil & Gas, Inc. | Wichita, KS 67203 | Oil Operator | Dec 1997 |
| 26242 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Jun 2026 |
| 26243 | Silver Creek Permian Op Co, LLC | Irving, TX 75038 | Oil & Gas Operator | Apr 2023 |
| 26244 | Silver Creek Resources, LLC | Irving, TX 75038 | Oil & Gas Operator | Apr 2017 |
| 26245 | Silver Cross Energy Partners LLC | Richmond, TX 77469 | Oil & Gas Operator | Jun 2026 |
| 26246 | Silver Eagle Oil Company | Ada, OK 74820 | Oil Operator | Dec 2004 |
| 26247 | Silver Exploration Company | | Oil & Gas Operator | Mar 2026 |
| 26248 | Silver Fox Oil & Gas LLC | McAllen, TX 78504 | Oil & Gas Operator | Jun 2026 |
| 26249 | Silver Hill Energy Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Jun 2026 |
| 26250 | Silver Hill Energy Partners, LLC | Dallas, TX 75219 | Oil & Gas Operator | Feb 2017 |
| 26251 | Silver Mountain Energy LLC | | Gas Operator | Dec 2025 |
| 26252 | Silver Oak Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2016 |
| 26253 | Silver Oak Operating, Inc. | Longview, TX 75601 | Oil & Gas Operator | Dec 2009 |
| 26254 | Silver Oak Operating, LLC | Longview, TX 75604 | Oil & Gas Operator | Jun 2026 |
| 26255 | Silver Oil & Gas Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Jun 2026 |
| 26256 | Silver Pines Energy Corp. | Houston, TX 77005 | Oil & Gas Operator | Feb 2026 |
| 26257 | Silver Rock Energy, LLC | Terrell, TX 75160 | Oil Operator | Jun 2026 |
| 26258 | Silver Spike Energy Oper, LLC | Midland, TX 79710 | Oil & Gas Operator | Dec 2015 |
| 26259 | Silver Spike Energy Operating Of NM, LLC | Midland, TX 79701 | Oil Operator | Jul 2016 |
| 26260 | Silver Star Of Nevada Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Feb 2026 |
| 26261 | Silver Star Operating Co., LLC | Nada, TX 77460 | Gas Operator | Jun 2026 |
| 26262 | Silver Star Production Co | Moore, OK 73160-6202 | Oil & Gas Operator | Dec 2025 |
| 26263 | Silver Thread Oil & Gas, Inc. | | Oil & Gas Operator | Jul 2015 |
| 26264 | Silver Tusk Operating Co. LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2018 |
| 26265 | Silverado Oil Inc | Greeley, CO 80631 | Oil Operator | Apr 2000 |
| 26266 | Silverado Oil LTD | Ardmore, OK 73401 | Oil & Gas Operator | Jun 2003 |
| 26267 | Silverado Operating LLC | Plntersville, TX 77363 | Oil Operator | Jun 2026 |
| 26268 | Silverback Operating II, LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Feb 2026 |
| 26269 | Silverback Operating, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Oct 2016 |
| 26270 | Silverbow Resources Oper, LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 26271 | Silverbrook Operating II LLC | Barker, TX 77413 | Oil & Gas Operator | Jun 2026 |
| 26272 | Silverbrook Operating, LLC | Barker, TX 77413 | Oil & Gas Operator | Jun 2026 |
| 26273 | Silverridge Corp | Van Buren, AR 72956 | Oil & Gas Operator | Mar 2015 |
| 26274 | Silvertin Farm Production LLC | Poteau, OK 74953 | Oil & Gas Operator | Apr 2020 |
| 26275 | Simar Petroleum, LLC | | Oil Operator | Dec 2024 |
| 26276 | Simasko Producti | | Oil Operator | Dec 1986 |
| 26277 | Simasko Production Co | Denver, CO 80204 | Oil & Gas Operator | Nov 1997 |
| 26278 | Simata Energy | Midland, TX 79708 | Oil & Gas Operator | Jun 2026 |
| 26279 | Simata Energy, LLC | Midland, TX 79708 | Oil & Gas Operator | Jun 2026 |
| 26280 | Simco Oil Company | | Oil Operator | Jul 1990 |
| 26281 | Simco Oil, LLC | Lytle, TX 78052 | Oil Operator | Jun 2026 |
| 26282 | Simco Operating | Shawnee, OK 74804-2501 | Oil Operator | Jan 2013 |
| 26283 | Simco Petroleum | Cheyenne, WY 82003 | Oil & Gas Operator | Oct 2009 |
| 26284 | Simcoe LLC | Durango, CO 81301 | Oil & Gas Operator | Mar 2026 |
| 26285 | Simcoe Oil Company | Scottsdale, AZ 85258-2553 | Oil & Gas Operator | May 2020 |
| 26286 | Simme, Steven | Elma, NY 14052 | Gas Operator | Dec 2024 |
| 26287 | Simminger, Robert John Jr | | Oil Operator | Dec 2025 |
| 26288 | Simmons Donald M | Muskogee, OK 74401 | Oil & Gas Operator | May 2013 |
| 26289 | Simmons Engr & Consulting Co | Farmington, NM 87499 | Gas Operator | Feb 2002 |
| 26290 | Simmons Evelyn B-Per Represent | Edmond, OK 73083-3610 | Oil & Gas Operator | Aug 1996 |
| 26291 | Simmons Mack McCoy | Cement, OK 73017 | Oil Operator | Feb 2025 |
| 26292 | Simmons Oil Corp | | Oil Operator | Jan 1989 |
| 26293 | Simmons Robert Z | | Oil Operator | Dec 1990 |
| 26294 | Simmons, Inc.* D. J. | | Oil & Gas Operator | May 2020 |
| 26295 | Simmons, L.B. Energy, Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 2000 |
| 26296 | Simmons, Stanley J. | Olney, TX 76374 | Oil & Gas Operator | Aug 1994 |
| 26297 | Simon Joseph W | Carney, OK 74832-0443 | Oil & Gas Operator | Dec 2016 |
| 26298 | Simon Of Bolivar Enterprises Inc | Cuba, NY 14727 | Oil & Gas Operator | Dec 2024 |
| 26299 | Simon Oil Company | Ardmore, OK 73401 | Oil Operator | Feb 2026 |
| 26300 | Simon Oil LLC | Kaycee, WY 82639 | Oil Operator | Feb 2026 |