| 301 | Slate Holdings, Inc. | Mineral Wells, TX 76068 | Oil & Gas Operator | Dec 2025 |
| 302 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 303 | Sogo III LLC | Midland, TX 79702 | Oil & Gas Operator | Jul 2017 |
| 304 | Sojourner Drilling Corporation | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 305 | Southwest Royalties, Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 306 | Spalding Energy, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 307 | Spi Operations LLC | Midland, TX 79710 | Oil & Gas Operator | Jan 2013 |
| 308 | SSC, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Dec 2025 |
| 309 | Staley Operating Co. | Midland, TX 79702 | Oil & Gas Operator | Jan 2022 |
| 310 | Stanolind Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2021 |
| 311 | Stanolind Production LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2020 |
| 312 | Steller Energy & Investment Corp | Plano, TX 75093 | Oil & Gas Operator | Feb 2021 |
| 313 | Stephens, Autry C. | Midland, TX 79701 | Oil & Gas Operator | Mar 2023 |
| 314 | Steward Energy II, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 315 | Strata Petroleum Co. | Midland, TX 79701 | Oil & Gas Operator | May 1997 |
| 316 | Suncoast Technical Services Inc | Dallas, TX 75251 | Oil & Gas Operator | Dec 2025 |
| 317 | Synergex Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Sep 2025 |
| 318 | T2 Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 319 | Tactical Oil & Gas, LLC | Odessa, TX 79768 | Oil & Gas Operator | Dec 2025 |
| 320 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 321 | Tandem Energy Corporation | Houston, TX 77056 | Oil & Gas Operator | Dec 2025 |
| 322 | Targa Midstream Services LLC | Houston, TX 77002 | Oil Operator | Mar 2023 |
| 323 | TC Oil And Gas, LLC | Denton, TX 76205 | Oil Operator | Dec 2025 |
| 324 | Tema Oil And Gas Company | Houston, TX 77084 | Oil & Gas Operator | Dec 2025 |
| 325 | Tema Oil And Gas, LLC | Houston, TX 77040 | Oil & Gas Operator | Apr 2000 |
| 326 | Texaco E & P Inc. | Houston, TX 77099 | Oil & Gas Operator | Dec 2025 |
| 327 | Texland-Rector & Schumacher | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2000 |
| 328 | Texstar Operating Inc. | Lubbock, TX 79423 | Oil & Gas Operator | Dec 2025 |
| 329 | Tgo Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Dec 2008 |
| 330 | Three Span Oil & Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 331 | Threshold Development Company | Fort Worth, TX 76109 | Oil & Gas Operator | Aug 2016 |
| 332 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 333 | Trinity Bay Oil & Gas, Inc. | Lubbock, TX 79416 | Oil & Gas Operator | Dec 2025 |
| 334 | Trinity Eor, LLC | Midland, TX 79701 | Oil & Gas Operator | Jan 2019 |
| 335 | Turrentine Oil & Gas, Inc. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Oct 2019 |
| 336 | Turrentine Oil And Gas | Levelland, TX 79336 | Oil & Gas Operator | Feb 1996 |
| 337 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 338 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 339 | Union Royalty, Inc. | Midland, TX 79706 | Oil & Gas Operator | Jul 2014 |
| 340 | United Company | Lubbock, TX 79408 | Oil & Gas Operator | Jun 1995 |
| 341 | United Oil & Minerals L. P. | Austin, TX 78746 | Oil & Gas Operator | Jun 2003 |
| 342 | United Oil & Minerals, Inc. | Austin, TX 78746 | Oil & Gas Operator | Jan 2001 |
| 343 | United Resources LP | Austin, TX 78746 | Oil & Gas Operator | Oct 2011 |
| 344 | Uplands Resources Inc | Tulsa, OK 74103-4141 | Oil & Gas Operator | Aug 2025 |
| 345 | V-F Petroleum Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 346 | Valence Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Dec 2025 |
| 347 | Vanguard Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 348 | Vanguard Permian, LLC | Houston, TX 77057 | Oil & Gas Operator | Nov 2018 |
| 349 | Vision Oil And Gas LLC | Laredo, TX 78041 | Oil & Gas Operator | Dec 2025 |
| 350 | Vista Resources, Inc. (A) | Midland, TX 79701 | Oil & Gas Operator | Feb 2000 |
| 351 | W & W Oil, Inc. | Lovington, NM 88260 | Oil & Gas Operator | May 1999 |
| 352 | Walkabout Operating, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Dec 2025 |
| 353 | Walking X Oil Co. | Whiteface, TX 79379 | Oil & Gas Operator | Dec 2025 |
| 354 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Dec 2025 |
| 355 | Walsh Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2022 |
| 356 | Wes-Tex Drilling Company | Abilene, TX 79604 | Oil & Gas Operator | Jan 2000 |
| 357 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 358 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 359 | Wheeler Operating Corporation | Fort Worth, TX 76109 | Oil & Gas Operator | Dec 2025 |
| 360 | White'S Industrial Engine'S | Houston, TX 77070 | Oil & Gas Operator | Dec 2025 |
| 361 | White, E. C. Oil Co. | Whiteface, TX 79379 | Oil & Gas Operator | Nov 2012 |
| 362 | Windy Cove Energy II, LLC | Houston, TX 77079 | Oil & Gas Operator | Sep 2020 |
| 363 | Winn Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 364 | WTG Exploration | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 365 | WTG Exploration Inc | Midland, TX 79705 | Oil & Gas Operator | Dec 2023 |
| 366 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 367 | Young Marshall R Oil Co | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2011 |
| 368 | Yucca Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |