| 301 | Sage Natural Resources LLC | Tulsa, OK 74170 | Oil & Gas Operator | Jul 2025 |
| 302 | Sage Oil And Gas, LLC | Graham, TX 76450 | Gas Operator | Jul 2025 |
| 303 | Sand Springs Oil & Gas Co. | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2025 |
| 304 | Sauder Management Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Jul 2025 |
| 305 | Schalk, Thomas S. | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 1995 |
| 306 | Seelye, William L. | Plano, TX 75024 | Oil & Gas Operator | Oct 2005 |
| 307 | Seiguf Oil Company, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jul 2025 |
| 308 | Seitz, Comegys & Seitz | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 1994 |
| 309 | Seitz, J. R. & Adam | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2008 |
| 310 | Seitz, J. R. & Adam, LTD. | Wichita Falls, TX 76307 | Oil Operator | Jul 2025 |
| 311 | Sendero Energy Inc. | Dallas, TX 75205 | Oil & Gas Operator | Jul 2025 |
| 312 | Service Clearing Corp | Dallas, TX 75229 | Oil & Gas Operator | Jul 2025 |
| 313 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Jul 2025 |
| 314 | Silver Creek Resources, LLC | Irving, TX 75038 | Oil & Gas Operator | Apr 2017 |
| 315 | Ski Production, LLC | Muenster, TX 76252 | Oil Operator | Jul 2025 |
| 316 | Slick Production, LLC | Muenster, TX 76252 | Oil & Gas Operator | Jul 2025 |
| 317 | Smith Oil Company | Smackover, AR 71762 | Oil Operator | Dec 2024 |
| 318 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Jul 2025 |
| 319 | Smith, Joe H. | Argyle, TX 76226 | Oil & Gas Operator | Nov 1998 |
| 320 | SNR Operating, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Jul 2025 |
| 321 | Snuggs Oil Company | Gainesville, TX 76240 | Oil & Gas Operator | Jan 2024 |
| 322 | Spade Energy L.L.C. | Wichita Falls, TX 76310 | Gas Operator | Jul 2025 |
| 323 | Spitfire Partners, LLC | Dallas, TX 75225 | Oil Operator | Jul 2025 |
| 324 | SSC, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Jul 2025 |
| 325 | St. Cajetan Oil Company, LLC | Gainesville, TX 76240 | Oil & Gas Operator | Jul 2025 |
| 326 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 327 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 328 | Stahl Petroleum Co. | Amarillo, TX 79118 | Oil & Gas Operator | Aug 2003 |
| 329 | Star-Jet Co. | Gainesville, TX 76240 | Oil Operator | Jul 2025 |
| 330 | Staub, Larry | Richardson, TX 75080 | Oil & Gas Operator | Aug 2003 |
| 331 | Staub, Larry, Inc. | Azle, TX 76020 | Oil & Gas Operator | Jul 2025 |
| 332 | Stryker Energy Corp. | Mesquite, TX 75180 | Oil & Gas Operator | Jul 2025 |
| 333 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 334 | Sydri Operating, LLC | Dallas, TX 75231 | Oil & Gas Operator | Jul 2025 |
| 335 | Syntax Energy Corporation | Denton, TX 76210 | Oil Operator | Jul 2025 |
| 336 | T. R. Production, Inc. | Pilot Point, TX 76258 | Oil & Gas Operator | Jul 2021 |
| 337 | Targa Midstream Services LLC | Houston, TX 77002 | Oil Operator | Mar 2023 |
| 338 | Targa Pipeline Mid-Continent LLC | Sulphur, LA 70665 | Oil & Gas Operator | Jun 2018 |
| 339 | Targo Oil & Gas, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Jul 2025 |
| 340 | Tatanka Operating, LLC | Whitesboro, TX 76273 | Oil & Gas Operator | Jul 2025 |
| 341 | Taylor & Smith | Gainesville, TX 76240 | Oil & Gas Operator | Jul 2025 |
| 342 | Taylor, Smith And Kimbell | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2012 |
| 343 | TCT Operating Company, Inc. | Johnson City, TX 78636 | Oil & Gas Operator | Feb 2017 |
| 344 | TDC Engineering, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2025 |
| 345 | Team Operating, L.L.C. | Pinehurst, TX 77362 | Oil & Gas Operator | Jul 2025 |
| 346 | Tettleton, Jon Otis | Nocona, TX 76255 | Oil & Gas Operator | Aug 2003 |
| 347 | Tettleton, Steven B. | Nocona, TX 76255 | Oil Operator | Jul 2025 |
| 348 | Texaco E & P Inc | Houston, TX 77099 | Oil & Gas Operator | Jul 2025 |
| 349 | Texas Exploration & Prod. Co. | Gainesville, TX 76240 | Oil & Gas Operator | Apr 1996 |
| 350 | Texas Independent Oil Co., LLC | Argyle, TX 76226 | Oil & Gas Operator | Jul 2025 |
| 351 | Texcel Exploration, Inc. | Colorado SPGS, CO 80960 | Oil & Gas Operator | Jul 2025 |
| 352 | The Cornell Corporation | Fort Worth, TX 76109 | Oil & Gas Operator | Sep 1993 |
| 353 | Thunder Resources LLC | Graham, TX 76450 | Oil Operator | Jul 2025 |
| 354 | TK Drilling Corp. | Tulsa, OK 74133 | Oil & Gas Operator | Apr 2025 |
| 355 | Trailhead Exploration, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2025 |
| 356 | Trio Consulting & Management,LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Jul 2025 |
| 357 | Triple G Well Service, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Jul 2025 |
| 358 | Trumter Petroleum Corporation | Fort Worth, TX 76185 | Oil & Gas Operator | Aug 1998 |
| 359 | U. S. Energy Development Corporation | Fort Worth, TX 76164 | Oil & Gas Operator | Jul 2025 |
| 360 | U. S. Operating, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Jul 2025 |
| 361 | Ultra Oil & Gas, Inc. | Centerton, AR 72719 | Oil & Gas Operator | Jul 2025 |
| 362 | United Texas Petroleum Inc. | McKinney, TX 75070 | Oil & Gas Operator | Jul 2025 |
| 363 | V & H Oil, L.P. | Muenster, TX 76252 | Oil & Gas Operator | Jul 2025 |
| 364 | Vandermeer Energy Corp. | Dallas, TX 75225 | Oil & Gas Operator | Nov 1998 |
| 365 | Vantage Fort Worth Energy LLC | Pittsburgh, PA 15222 | Oil & Gas Operator | Oct 2017 |
| 366 | Vastar Resources Inc | Houston, TX 77253 | Oil & Gas Operator | Mar 2025 |
| 367 | Viola Production Inc | Dallas, TX 75251 | Oil & Gas Operator | Jul 2025 |
| 368 | Voth Operating, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Oct 2005 |
| 369 | W-N Energy Corp | Tulsa, OK 74121-1468 | Oil & Gas Operator | Nov 1994 |
| 370 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Jul 2025 |
| 371 | Walter Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | May 2009 |
| 372 | Walterscheid, A. D. | Muenster, TX 76252 | Oil & Gas Operator | Dec 2014 |
| 373 | Walterscheid, R. F. | Muenster, TX 76252 | Oil & Gas Operator | Oct 1993 |
| 374 | Waylander LLC | Plano, TX 75025 | Oil & Gas Operator | Jul 2025 |
| 375 | WBH Energy Partners LLC | Austin, TX 78703 | Oil & Gas Operator | Jul 2025 |
| 376 | West Bay Exploration Company | Muenster, TX 76252 | Oil & Gas Operator | Apr 2025 |
| 377 | Westbrook Oil & Gas Co. Inc. | Gainesville, TX 76240 | Oil & Gas Operator | Jul 2025 |
| 378 | Western Petroleum Resources, Inc | Dallas, TX 75219 | Oil & Gas Operator | May 2021 |
| 379 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 380 | Westside Energy Op. Co., LP | Oklahoma City, OK 73142 | Oil & Gas Operator | Jun 2008 |
| 381 | WFW Production Company, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Jul 2025 |
| 382 | Whittington Energy Co. | Melbourne, FL 32901 | Oil & Gas Operator | Jul 2025 |
| 383 | Willowbend Investments, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jul 2025 |
| 384 | Window Operating Co., The | Coleman, TX 76834 | Oil & Gas Operator | Jul 2025 |
| 385 | WLH Production LLC | Gainesville, TX 76240 | Oil Operator | Jul 2025 |
| 386 | Wynn-Crosby Operating, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Jul 2025 |
| 387 | Xyz Oil, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Jul 2025 |