| 12201 | Winchester Production Co., LTD. | Shreveport, LA 71129 | Oil & Gas Operator | Sep 2008 |
| 12202 | Winchester Production Company | Shreveport, LA 71129 | Oil & Gas Operator | Nov 2008 |
| 12203 | Winco Oil Inc. | Abilene, TX 79608 | Oil & Gas Operator | Sep 2026 |
| 12204 | Winco Petroleum Company | Richardson, TX 75080 | Oil & Gas Operator | Jan 2003 |
| 12205 | Wind River Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Sep 2026 |
| 12206 | Wind River Resources Inc | Tulsa, OK 74136-6381 | Oil & Gas Operator | Jun 2010 |
| 12207 | Windham Resources | Abilene, TX 79608 | Oil & Gas Operator | Sep 2026 |
| 12208 | Windham Resources, Inc. | Tuscola, TX 79562 | Oil & Gas Operator | Feb 2004 |
| 12209 | Windham, L. E. | Rankin, TX 79778 | Oil & Gas Operator | Dec 1996 |
| 12210 | Windham, L.E. Estate Of | Midland, TX 79702 | Oil & Gas Operator | Mar 2012 |
| 12211 | Windmill Oil Company | Austin, TX 78747 | Oil & Gas Operator | Mar 2008 |
| 12212 | Window Operating Co., The | Coleman, TX 76834 | Oil & Gas Operator | Sep 2026 |
| 12213 | Windrush Operating Co., L.L.C. | Longville, LA 70652 | Oil & Gas Operator | Sep 2026 |
| 12214 | Windsor Energy Group LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2021 |
| 12215 | Windsor Exploration Company | Dallas, TX 75204 | Oil & Gas Operator | Jan 1994 |
| 12216 | Windsor Permian LLC | Midland, TX 79701 | Oil & Gas Operator | Jun 2012 |
| 12217 | Windy Cove Energy II, LLC | Houston, TX 77079 | Oil & Gas Operator | Sep 2020 |
| 12218 | Wineland Oil - LLC | Hays, KS 67601 | Oil Operator | Apr 2026 |
| 12219 | Wineridge Inc. | Austin, TX 78747 | Oil Operator | Sep 2026 |
| 12220 | Winfield Operating Company | Dallas, TX 75214 | Oil & Gas Operator | Sep 2026 |
| 12221 | Winfrey Oil Co., Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2016 |
| 12222 | Wing Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2000 |
| 12223 | Wingrove Operating, LLC | Odessa, TX 79760 | Oil Operator | Sep 2026 |
| 12224 | Wingrove Well Service, Inc. | Lueders, TX 79533 | Oil & Gas Operator | Nov 2023 |
| 12225 | Winn Exploration Co., Inc. | Corpus Christ, TX 78401 | Oil & Gas Operator | Sep 2026 |
| 12226 | Winn Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2026 |
| 12227 | Winright Resources Operating,LLC | Houston, TX 77007 | Oil & Gas Operator | Sep 2026 |
| 12228 | Winslow Operating Company, LLC | Austin, TX 78737 | Oil & Gas Operator | Sep 2026 |
| 12229 | Winslow, Harry C. | San Antonio, TX 78217 | Oil & Gas Operator | Sep 2026 |
| 12230 | Winston Land & Cattle Co., Inc. | Lufkin, TX 75901 | Oil & Gas Operator | Feb 2001 |
| 12231 | Winston Land & Cattle I, LTD. | Lufkin, TX 75902 | Oil & Gas Operator | Nov 2014 |
| 12232 | Winwell, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2007 |
| 12233 | Wischkaemper, James K. | Shamrock, TX 79079 | Oil & Gas Operator | Aug 2023 |
| 12234 | Wischkaemper, Kenneth | Shamrock, TX 79079 | Oil & Gas Operator | Sep 2026 |
| 12235 | Wise Exploration | Perrin, TX 76486 | Oil & Gas Operator | Sep 2026 |
| 12236 | Wise Production Company | Bowie, TX 76230 | Oil & Gas Operator | Sep 2026 |
| 12237 | Wise Star Energy, LLC | Rockport, TX 78382 | Oil & Gas Operator | Sep 2026 |
| 12238 | Wise Supply Company | Bowie, TX 76230 | Oil & Gas Operator | Sep 2026 |
| 12239 | Wise Well Service | Bowie, TX 76230 | Oil & Gas Operator | Jul 2017 |
| 12240 | Wiseman, B. W., Jr. | Midland, TX 79702 | Oil & Gas Operator | Dec 2002 |
| 12241 | Wisenbaker Production Company | Tyler, TX 75702 | Oil & Gas Operator | Oct 2011 |
| 12242 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 12243 | Wishbone Texas Operating Co LLC | Houston, TX 77064 | Oil & Gas Operator | Jul 2019 |
| 12244 | Witherspoon Oil Co | Iowa Park, TX 76367 | Oil & Gas Operator | Sep 2026 |
| 12245 | Withrow Engineering, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Mar 2000 |
| 12246 | WJ South Waskom #1, LLC | Dallas, TX 75205 | Oil Operator | Sep 2026 |
| 12247 | WJC, Inc. | Post, TX 79356 | Oil & Gas Operator | Sep 2026 |
| 12248 | WJH Energy, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2026 |
| 12249 | WJR Production LLC | Fort Worth, TX 76177 | Oil Operator | Jun 2026 |
| 12250 | WJW Operating Co.,LLC | Austin, TX 78738 | Oil & Gas Operator | May 2002 |
| 12251 | WLH Production LLC | Gainesville, TX 76240 | Oil Operator | Sep 2026 |
| 12252 | WM Wild Wolf Production LLC | Albany, TX 76430 | Oil Operator | Sep 2026 |
| 12253 | Wmo Oil, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2026 |
| 12254 | WMS Corporation | Corsicana, TX 75110 | Oil & Gas Operator | Sep 2026 |
| 12255 | WMS Oil Company | Post, TX 79356 | Oil & Gas Operator | May 2019 |
| 12256 | WNR Haynesville Operating, LLC | Oklahoma City, OK 73102 | Gas Operator | Sep 2026 |
| 12257 | Wnu Energy LLC | Pinedale, WY 82941 | Oil & Gas Operator | Jul 2026 |
| 12258 | Wo Operating Company | Tulsa, OK 74159 | Oil & Gas Operator | Sep 2026 |
| 12259 | Wofford, C. J. | El Campo, TX 77437 | Oil & Gas Operator | Sep 2026 |
| 12260 | Wolco Energy, Inc. | Dallas, TX 75220 | Oil & Gas Operator | May 1997 |
| 12261 | Wolcott, Ed Operating | Dallas, TX 75205 | Oil & Gas Operator | Oct 2000 |
| 12262 | Wolf Creek Exploration Company | Amarillo, TX 79159 | Oil & Gas Operator | Aug 2000 |
| 12263 | Wolf Energy | Midland, TX 79701 | Oil & Gas Operator | Jan 1995 |
| 12264 | Wolf Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2021 |
| 12265 | Wolf, Gene | Windthorst, TX 76389 | Oil & Gas Operator | Apr 2003 |
| 12266 | Wolf, Gene L.L.C. | Windthorst, TX 76389 | Oil & Gas Operator | Sep 2026 |
| 12267 | Wolfcamp Energy, LLC | Midland, TX 79702 | Gas Operator | Sep 2026 |
| 12268 | Wolfcamp Oil & Gas, Inc. | Odessa, TX 79764 | Oil & Gas Operator | Dec 2004 |
| 12269 | Wolfe Oil Company | Stockdale, TX 78160 | Oil Operator | Sep 2026 |
| 12270 | Wolfson Oil Co. | Dallas, TX 75230 | Oil & Gas Operator | Sep 1999 |
| 12271 | Wolfson, I. J. | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2002 |
| 12272 | Wolsey Oil Inc. | Bowie, TX 76230 | Oil & Gas Operator | Oct 2013 |
| 12273 | Wolsey Well Service, Inc. | Windthorst, TX 76389 | Oil & Gas Operator | Jul 2006 |
| 12274 | Wolsey Well Service, L.P. | Bowie, TX 76230 | Oil & Gas Operator | Jun 2014 |
| 12275 | Wolverine Exploration Company | Houston, TX 77002 | Oil & Gas Operator | May 2019 |
| 12276 | Womack Energy, Inc. | Houston, TX 77057 | Oil & Gas Operator | Jun 2026 |
| 12277 | Womack Operating, LLC. | Houston, TX 77057 | Oil & Gas Operator | Sep 2026 |
| 12278 | Wood Energy Corporation | Baytown, TX 77520 | Oil & Gas Operator | Jun 1999 |
| 12279 | Wood Hi Co., Inc. | Victoria, TX 77902 | Oil & Gas Operator | Dec 2004 |
| 12280 | Wood Oil Company | Tulsa, OK 74103 | Gas Operator | Oct 1997 |
| 12281 | Wood, C.W. | Calliham, TX 78007 | Oil & Gas Operator | Sep 2023 |
| 12282 | Wood, McShane & Thams | Midland, TX 79702 | Oil & Gas Operator | Oct 1995 |
| 12283 | Woodbine Acquisition LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2014 |
| 12284 | Woodbine Petroleum, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Aug 2003 |
| 12285 | Woodbine Production Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2026 |
| 12286 | Woods Oil Co. | Burkburnett, TX 76354 | Oil & Gas Operator | Sep 2026 |
| 12287 | Woods Operating Co., Inc. | Shreveport, LA 71136 | Oil & Gas Operator | Dec 2020 |
| 12288 | Woods, Herbert S. & Assoc. | El Dorado, AR 71730 | Gas Operator | Feb 2023 |
| 12289 | Woods, W.A. Oil Co. | Holliday, TX 76366 | Oil & Gas Operator | Dec 1993 |
| 12290 | Woodygreen Resources, LLC | Plano, TX 75093 | Oil & Gas Operator | Sep 2026 |
| 12291 | Woodygreen Resources, LP | Abilene, TX 79608 | Oil & Gas Operator | Mar 2012 |
| 12292 | Wooley Petroleum | Alvord, TX 76225 | Oil & Gas Operator | Oct 1994 |
| 12293 | World Energy Corporation | Laredo, TX 78041 | Oil & Gas Operator | Aug 2003 |
| 12294 | World Hydrocarbon, Inc. | Kaufman, TX 75142 | Gas Operator | Apr 1995 |
| 12295 | World Producers, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1994 |
| 12296 | Worldwide Energy Corporation | Freer, TX 78357 | Oil & Gas Operator | Jan 1997 |
| 12297 | Worldwide Exploration, Inc | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2002 |
| 12298 | Worsham-Steed Gas Storage, L.P. | Houston, TX 77002 | Oil & Gas Operator | Aug 2010 |
| 12299 | Worsham-Steed Gas Storage, LLC | Tulsa, OK 74172 | Oil & Gas Operator | Sep 2026 |
| 12300 | Wortham Oil & Gas | Conroe, TX 77301 | Oil & Gas Operator | Sep 2026 |