| 401 | Wilshire Oil Co. Of Texas | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2004 |
| 402 | Wilson - Owens Production Co. | Longview, TX 75601 | Oil & Gas Operator | Nov 1998 |
| 403 | Wilson Brothers Leasing Co., Inc | Midland, TX 79705 | Oil & Gas Operator | Mar 2015 |
| 404 | Wilson Energy LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2024 |
| 405 | Wilson Energy Resources LLC | Graham, TX 76450 | Oil Operator | Feb 2026 |
| 406 | Wilson Exploration Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 1996 |
| 407 | Wilson Hydrocarbon Inc. | Houston, TX 77066 | Oil & Gas Operator | Feb 2026 |
| 408 | Wilson Oil Co. | Houston, TX 77263 | Oil & Gas Operator | Feb 2026 |
| 409 | Wilson Operating Co. | Archer City, TX 76351 | Oil & Gas Operator | Feb 2026 |
| 410 | Wilson Operating Company LLC | Tulsa, OK 74105 | Oil & Gas Operator | Feb 2026 |
| 411 | Wilson Operating Service Inc | Brownfield, TX 79316 | Oil & Gas Operator | Aug 2003 |
| 412 | Wilson Petroleum Co. | Springfield, MO 65803 | Oil & Gas Operator | Feb 2026 |
| 413 | Wilson Resources, Inc. | Longview, TX 75601 | Oil & Gas Operator | Feb 2026 |
| 414 | Wilson Well Service Inc. | Cross Plains, TX 76443 | Oil & Gas Operator | Feb 2026 |
| 415 | Wilson, Billy R. | New Braunfels, TX 78130 | Oil & Gas Operator | Feb 2026 |
| 416 | Wilson, Charles B., Jr., Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2000 |
| 417 | Wilson, David A. | Longview, TX 75606 | Oil & Gas Operator | Mar 1997 |
| 418 | Wilson, Dell | Odessa, TX 79762 | Oil & Gas Operator | Aug 2004 |
| 419 | Wilson, Dewey | Coleman, TX 76834 | Oil & Gas Operator | Nov 2007 |
| 420 | Wilson, Don H., Inc. | Elkhart, TX 75839 | Oil & Gas Operator | May 2019 |
| 421 | Wilson, E. C. Enterprises, Inc. | Houston, TX 77056 | Gas Operator | May 1993 |
| 422 | Wilson, Jerry L. | Ranger, TX 76470 | Oil & Gas Operator | Feb 2026 |
| 423 | Wilson, Olan Max | Cisco, TX 76437 | Oil & Gas Operator | Feb 2026 |
| 424 | Wilson, W. Corp. | Midland, TX 79705 | Oil & Gas Operator | Mar 1999 |
| 425 | Wilson, W.W. Jr. Properties | Abilene, TX 79605 | Oil & Gas Operator | Jul 1995 |
| 426 | Wilson, WM. B. Exploration Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 1996 |
| 427 | Wilson-Shab Corp. | Electra, TX 76360 | Oil & Gas Operator | Feb 2026 |
| 428 | Wilton Oil Company | Dallas, TX 75206 | Oil & Gas Operator | Apr 1999 |
| 429 | Wilton, Frank | Graham, TX 76450 | Oil & Gas Operator | Oct 2016 |
| 430 | Wimberley Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2013 |
| 431 | Wimco | Dallas, TX 75229 | Oil & Gas Operator | Jul 2008 |
| 432 | Wimsco, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Dec 1994 |
| 433 | Winchester Energy Operating Co. | Austin, TX 78746 | Oil & Gas Operator | Feb 2026 |
| 434 | Winchester Energy, LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 435 | Winchester Exploration, Inc. | Arlington, TX 76013 | Oil & Gas Operator | Aug 2003 |
| 436 | Winchester Oil & Gas LLC | Rockdale, TX 76567 | Oil Operator | Feb 2026 |
| 437 | Winchester Operating, Inc. | Bryan, TX 77808 | Oil & Gas Operator | Aug 2001 |
| 438 | Winchester Production Co., LTD. | Shreveport, LA 71129 | Oil & Gas Operator | Sep 2008 |
| 439 | Winchester Production Company | Shreveport, LA 71129 | Oil & Gas Operator | Nov 2008 |
| 440 | Winco Oil Inc. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2026 |
| 441 | Winco Petroleum Company | Richardson, TX 75080 | Oil & Gas Operator | Jan 2003 |
| 442 | Wind River Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 443 | Wind River Resources Inc | Tulsa, OK 74136-6381 | Oil & Gas Operator | Jun 2010 |
| 444 | Windham Resources | Abilene, TX 79608 | Oil & Gas Operator | Feb 2026 |
| 445 | Windham Resources, Inc. | Tuscola, TX 79562 | Oil & Gas Operator | Feb 2004 |
| 446 | Windham, L. E. | Rankin, TX 79778 | Oil & Gas Operator | Dec 1996 |
| 447 | Windham, L.E. Estate Of | Midland, TX 79702 | Oil & Gas Operator | Mar 2012 |
| 448 | Windmill Oil Company | Austin, TX 78747 | Oil & Gas Operator | Mar 2008 |
| 449 | Window Operating Co., The | Coleman, TX 76834 | Oil & Gas Operator | Feb 2026 |
| 450 | Windrush Operating Co., L.L.C. | Longville, LA 70652 | Oil & Gas Operator | Feb 2026 |
| 451 | Windsor Energy Group LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2021 |
| 452 | Windsor Exploration Company | Dallas, TX 75204 | Oil & Gas Operator | Jan 1994 |
| 453 | Windsor Permian LLC | Midland, TX 79701 | Oil & Gas Operator | Jun 2012 |
| 454 | Windy Cove Energy II, LLC | Houston, TX 77079 | Oil & Gas Operator | Sep 2020 |
| 455 | Wineglass Production, LLC | Ranger, TX 76470 | Oil Operator | Feb 2026 |
| 456 | Wineland Oil - LLC | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 457 | Wineridge Inc. | Austin, TX 78747 | Oil Operator | Feb 2026 |
| 458 | Winfield Operating Company | Dallas, TX 75214 | Oil & Gas Operator | Feb 2026 |
| 459 | Winfrey Oil Co., Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2016 |
| 460 | Wing Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2000 |
| 461 | Wingrove Operating, LLC | Odessa, TX 79760 | Oil Operator | Feb 2026 |
| 462 | Wingrove Well Service, Inc. | Lueders, TX 79533 | Oil & Gas Operator | Nov 2023 |
| 463 | Winn Exploration Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Feb 2026 |
| 464 | Winn Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 465 | Winright Resources Operating,LLC | Houston, TX 77007 | Oil & Gas Operator | Feb 2026 |
| 466 | Winslow Operating Company, LLC | Austin, TX 78737 | Oil & Gas Operator | Feb 2026 |
| 467 | Winslow, Harry C. | San Antonio, TX 78217 | Oil & Gas Operator | Feb 2026 |
| 468 | Winston Land & Cattle Co., Inc. | Lufkin, TX 75901 | Oil & Gas Operator | Feb 2001 |
| 469 | Winston Land & Cattle I, LTD. | Lufkin, TX 75902 | Oil & Gas Operator | Nov 2014 |
| 470 | Winwell, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2007 |
| 471 | Wischkaemper, James K. | Shamrock, TX 79079 | Oil & Gas Operator | Aug 2023 |
| 472 | Wischkaemper, Kenneth | Shamrock, TX 79079 | Oil & Gas Operator | Feb 2026 |
| 473 | Wise Exploration | Perrin, TX 76486 | Oil & Gas Operator | Feb 2026 |
| 474 | Wise Production Company | Bowie, TX 76230 | Oil & Gas Operator | Feb 2026 |
| 475 | Wise Star Energy, LLC | Port Aransas, TX 78373 | Oil & Gas Operator | Feb 2026 |
| 476 | Wise Supply Company | Bowie, TX 76230 | Oil & Gas Operator | Feb 2026 |
| 477 | Wise Well Service | Bowie, TX 76230 | Oil & Gas Operator | Jul 2017 |
| 478 | Wiseman, B. W., Jr. | Midland, TX 79702 | Oil & Gas Operator | Dec 2002 |
| 479 | Wisenbaker Production Company | Tyler, TX 75702 | Oil & Gas Operator | Oct 2011 |
| 480 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 481 | Wishbone Texas Operating Co LLC | Houston, TX 77064 | Oil & Gas Operator | Jul 2019 |
| 482 | Witherspoon Oil Co | Iowa Park, TX 76367 | Oil & Gas Operator | Feb 2026 |
| 483 | Withrow Engineering, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Mar 2000 |
| 484 | WJ South Waskom #1, LLC | Dallas, TX 75205 | Oil Operator | Feb 2026 |
| 485 | WJC, Inc. | Post, TX 79356 | Oil & Gas Operator | Feb 2026 |
| 486 | WJH Energy, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 487 | WJR Production LLC | Fort Worth, TX 76177 | Oil Operator | Feb 2026 |
| 488 | WJW Operating Co.,LLC | Austin, TX 78738 | Oil & Gas Operator | May 2002 |
| 489 | WLH Production LLC | Gainesville, TX 76240 | Oil Operator | Feb 2026 |
| 490 | WM Wild Wolf Production LLC | Albany, TX 76430 | Oil Operator | Feb 2026 |
| 491 | Wmo Oil, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 492 | WMS Corporation | Corsicana, TX 75110 | Oil & Gas Operator | Feb 2026 |
| 493 | WMS Oil Company | Post, TX 79356 | Oil & Gas Operator | May 2019 |
| 494 | Wnu Energy LLC | Pinedale, WY 82941 | Oil & Gas Operator | Jan 2026 |
| 495 | Wo Operating Company | Tulsa, OK 74159 | Oil & Gas Operator | Feb 2026 |
| 496 | Wofford, C. J. | El Campo, TX 77437 | Oil & Gas Operator | Feb 2026 |
| 497 | Wolco Energy, Inc. | Dallas, TX 75220 | Oil & Gas Operator | May 1997 |
| 498 | Wolcott, Ed Operating | Dallas, TX 75205 | Oil & Gas Operator | Oct 2000 |
| 499 | Wolf Creek Exploration Company | Amarillo, TX 79159 | Oil & Gas Operator | Aug 2000 |
| 500 | Wolf Energy | Midland, TX 79701 | Oil & Gas Operator | Jan 1995 |