| 12301 | Williford Energy Company | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2025 |
| 12302 | Williford Petroleum, L.L.C. | Green CV SPGS, FL 32043 | Oil & Gas Operator | Dec 2025 |
| 12303 | Willis Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 12304 | Willo Oil & Gas Exploration, LLC | Boerne, TX 78006 | Oil & Gas Operator | Jul 2020 |
| 12305 | Willow Bend Oil LLC | Dallas, TX 75206 | Oil & Gas Operator | Dec 2025 |
| 12306 | Willow Creek Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2009 |
| 12307 | Willow Springs Prod. Serv.,LLC | Kilgore, TX 75663 | Oil & Gas Operator | Aug 1997 |
| 12308 | Willow Springs Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Sep 1999 |
| 12309 | Willowbend Investments, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 12310 | Wills Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 1995 |
| 12311 | Wills Oil Holdings, L.L.C. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 12312 | Willstar Energy GP, LLC | Houston, TX 77279 | Oil & Gas Operator | Sep 2013 |
| 12313 | Wilmoth Interests, Inc. | Marion Center, PA 15759 | Oil & Gas Operator | Aug 2025 |
| 12314 | Wilshire Oil Co. Of Texas | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2004 |
| 12315 | Wilson - Owens Production Co. | Longview, TX 75601 | Oil & Gas Operator | Nov 1998 |
| 12316 | Wilson Brothers Leasing Co., Inc | Midland, TX 79705 | Oil & Gas Operator | Mar 2015 |
| 12317 | Wilson Energy LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2024 |
| 12318 | Wilson Energy Resources LLC | Graham, TX 76450 | Oil Operator | Dec 2025 |
| 12319 | Wilson Exploration Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 1996 |
| 12320 | Wilson Hydrocarbon Inc. | Houston, TX 77066 | Oil & Gas Operator | Dec 2025 |
| 12321 | Wilson Oil Co. | Houston, TX 77263 | Oil & Gas Operator | Dec 2025 |
| 12322 | Wilson Operating Co. | Archer City, TX 76351 | Oil & Gas Operator | Dec 2025 |
| 12323 | Wilson Operating Company LLC | Tulsa, OK 74105 | Oil & Gas Operator | Dec 2025 |
| 12324 | Wilson Operating Service Inc | Brownfield, TX 79316 | Oil & Gas Operator | Aug 2003 |
| 12325 | Wilson Petroleum Co. | Springfield, MO 65803 | Oil & Gas Operator | Dec 2025 |
| 12326 | Wilson Resources, Inc. | Longview, TX 75601 | Oil & Gas Operator | Dec 2025 |
| 12327 | Wilson Well Service Inc. | Cross Plains, TX 76443 | Oil & Gas Operator | Dec 2025 |
| 12328 | Wilson, Billy R. | New Braunfels, TX 78130 | Oil & Gas Operator | Dec 2025 |
| 12329 | Wilson, Charles B., Jr., Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2000 |
| 12330 | Wilson, David A. | Longview, TX 75606 | Oil & Gas Operator | Mar 1997 |
| 12331 | Wilson, Dell | Odessa, TX 79762 | Oil & Gas Operator | Aug 2004 |
| 12332 | Wilson, Dewey | Coleman, TX 76834 | Oil & Gas Operator | Nov 2007 |
| 12333 | Wilson, Don H., Inc. | Elkhart, TX 75839 | Oil & Gas Operator | May 2019 |
| 12334 | Wilson, Jerry L. | Ranger, TX 76470 | Oil & Gas Operator | Dec 2025 |
| 12335 | Wilson, Olan Max | Cisco, TX 76437 | Oil & Gas Operator | Dec 2025 |
| 12336 | Wilson, W. Corp. | Midland, TX 79705 | Oil & Gas Operator | Mar 1999 |
| 12337 | Wilson, W.W. Jr. Properties | Abilene, TX 79605 | Oil & Gas Operator | Jul 1995 |
| 12338 | Wilson, WM. B. Exploration Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 1996 |
| 12339 | Wilson-Shab Corp. | Electra, TX 76360 | Oil & Gas Operator | Dec 2025 |
| 12340 | Wilton Oil Company | Dallas, TX 75206 | Oil & Gas Operator | Apr 1999 |
| 12341 | Wilton, Frank | Graham, TX 76450 | Oil & Gas Operator | Oct 2016 |
| 12342 | Wimberley Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2013 |
| 12343 | Wimco | Dallas, TX 75229 | Oil & Gas Operator | Jul 2008 |
| 12344 | Wimsco, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Dec 1994 |
| 12345 | Winchester Energy Operating Co. | Austin, TX 78746 | Oil & Gas Operator | Dec 2025 |
| 12346 | Winchester Energy, LLC | Houston, TX 77056 | Oil & Gas Operator | Dec 2025 |
| 12347 | Winchester Exploration, Inc. | Arlington, TX 76013 | Oil & Gas Operator | Aug 2003 |
| 12348 | Winchester Oil & Gas LLC | Rockdale, TX 76567 | Oil Operator | Dec 2025 |
| 12349 | Winchester Operating, Inc. | Bryan, TX 77808 | Oil & Gas Operator | Aug 2001 |
| 12350 | Winchester Production Co., LTD. | Shreveport, LA 71129 | Oil & Gas Operator | Sep 2008 |
| 12351 | Winchester Production Company | Shreveport, LA 71129 | Oil & Gas Operator | Nov 2008 |
| 12352 | Winco Oil Inc. | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 12353 | Winco Petroleum Company | Richardson, TX 75080 | Oil & Gas Operator | Jan 2003 |
| 12354 | Wind River Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 12355 | Wind River Resources Inc | Tulsa, OK 74136-6381 | Oil & Gas Operator | Jun 2010 |
| 12356 | Windham Resources | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 12357 | Windham Resources, Inc. | Tuscola, TX 79562 | Oil & Gas Operator | Feb 2004 |
| 12358 | Windham, L. E. | Rankin, TX 79778 | Oil & Gas Operator | Dec 1996 |
| 12359 | Windham, L.E. Estate Of | Midland, TX 79702 | Oil & Gas Operator | Mar 2012 |
| 12360 | Windmill Oil Company | Austin, TX 78747 | Oil & Gas Operator | Mar 2008 |
| 12361 | Window Operating Co., The | Coleman, TX 76834 | Oil & Gas Operator | Dec 2025 |
| 12362 | Windrush Operating Co., L.L.C. | Longville, LA 70652 | Oil & Gas Operator | Dec 2025 |
| 12363 | Windsor Energy Group LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2021 |
| 12364 | Windsor Exploration Company | Dallas, TX 75204 | Oil & Gas Operator | Jan 1994 |
| 12365 | Windsor Permian LLC | Midland, TX 79701 | Oil & Gas Operator | Jun 2012 |
| 12366 | Windy Cove Energy II, LLC | Houston, TX 77079 | Oil & Gas Operator | Sep 2020 |
| 12367 | Wineglass Production, LLC | Ranger, TX 76470 | Oil Operator | Dec 2025 |
| 12368 | Wineland Oil - LLC | Hays, KS 67601 | Oil Operator | May 2025 |
| 12369 | Wineridge Inc. | Austin, TX 78747 | Oil Operator | Dec 2025 |
| 12370 | Winfield Operating Company | Dallas, TX 75214 | Oil & Gas Operator | Dec 2025 |
| 12371 | Winfrey Oil Co., Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2016 |
| 12372 | Wing Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2000 |
| 12373 | Wingrove Operating, LLC | Odessa, TX 79760 | Oil Operator | Dec 2025 |
| 12374 | Wingrove Well Service, Inc. | Lueders, TX 79533 | Oil & Gas Operator | Nov 2023 |
| 12375 | Winn Exploration Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Dec 2025 |
| 12376 | Winn Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 12377 | Winright Resources Operating,LLC | Houston, TX 77007 | Oil & Gas Operator | Dec 2025 |
| 12378 | Winslow Operating Company, LLC | Austin, TX 78737 | Oil & Gas Operator | Dec 2025 |
| 12379 | Winslow, Harry C. | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2025 |
| 12380 | Winston Land & Cattle Co., Inc. | Lufkin, TX 75901 | Oil & Gas Operator | Feb 2001 |
| 12381 | Winston Land & Cattle I, LTD. | Lufkin, TX 75902 | Oil & Gas Operator | Nov 2014 |
| 12382 | Winwell, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2007 |
| 12383 | Wischkaemper, James K. | Shamrock, TX 79079 | Oil & Gas Operator | Aug 2023 |
| 12384 | Wischkaemper, Kenneth | Shamrock, TX 79079 | Oil & Gas Operator | Dec 2025 |
| 12385 | Wise Exploration | Perrin, TX 76486 | Oil & Gas Operator | Dec 2025 |
| 12386 | Wise Production Company | Bowie, TX 76230 | Oil & Gas Operator | Dec 2025 |
| 12387 | Wise Star Energy, LLC | Port Aransas, TX 78373 | Oil & Gas Operator | Dec 2025 |
| 12388 | Wise Supply Company | Bowie, TX 76230 | Oil & Gas Operator | Dec 2025 |
| 12389 | Wise Well Service | Bowie, TX 76230 | Oil & Gas Operator | Jul 2017 |
| 12390 | Wiseman, B. W., Jr. | Midland, TX 79702 | Oil & Gas Operator | Dec 2002 |
| 12391 | Wisenbaker Production Company | Tyler, TX 75702 | Oil & Gas Operator | Oct 2011 |
| 12392 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 12393 | Wishbone Texas Operating Co LLC | Houston, TX 77064 | Oil & Gas Operator | Jul 2019 |
| 12394 | Witherspoon Oil Co | Iowa Park, TX 76367 | Oil & Gas Operator | Dec 2025 |
| 12395 | Withrow Engineering, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Mar 2000 |
| 12396 | WJ South Waskom #1, LLC | Dallas, TX 75205 | Oil Operator | Dec 2025 |
| 12397 | WJC, Inc. | Post, TX 79356 | Oil & Gas Operator | Dec 2025 |
| 12398 | WJH Energy, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 12399 | WJR Production LLC | Fort Worth, TX 76177 | Oil Operator | Dec 2025 |
| 12400 | WJW Operating Co.,LLC | Austin, TX 78738 | Oil & Gas Operator | May 2002 |