| 12501 | Woodard Energy Company | Houston, TX 77042 | Oil & Gas Operator | Mar 2010 |
| 12502 | Woodbine Acquisition LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2014 |
| 12503 | Woodbine Petroleum, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Aug 2003 |
| 12504 | Woodbine Production Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 12505 | Woodlands Oil And Gas Inc. | The Woodlands, TX 77380 | Gas Operator | Jan 2014 |
| 12506 | Woods Oil Co. | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 2025 |
| 12507 | Woods Operating Co., Inc. | Shreveport, LA 71136 | Oil & Gas Operator | Dec 2020 |
| 12508 | Woods, Herbert S. & Assoc. | El Dorado, AR 71730 | Gas Operator | Feb 2023 |
| 12509 | Woods, W.A. Oil Co. | Holliday, TX 76366 | Oil & Gas Operator | Dec 1993 |
| 12510 | Woodygreen Resources, LLC | Plano, TX 75093 | Oil & Gas Operator | Dec 2025 |
| 12511 | Woodygreen Resources, LP | Abilene, TX 79608 | Oil & Gas Operator | Mar 2012 |
| 12512 | Wooley Petroleum | Alvord, TX 76225 | Oil & Gas Operator | Oct 1994 |
| 12513 | World Energy Corporation | Laredo, TX 78041 | Oil & Gas Operator | Aug 2003 |
| 12514 | World Hydrocarbon, Inc. | Kaufman, TX 75142 | Gas Operator | Apr 1995 |
| 12515 | World Producers, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1994 |
| 12516 | Worldwide Energy Corporation | Freer, TX 78357 | Oil & Gas Operator | Jan 1997 |
| 12517 | Worldwide Exploration, Inc | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2002 |
| 12518 | Worsham-Steed Gas Storage, L.P. | Houston, TX 77002 | Oil & Gas Operator | Aug 2010 |
| 12519 | Worsham-Steed Gas Storage, LLC | Tulsa, OK 74172 | Oil & Gas Operator | Dec 2025 |
| 12520 | Wortham Oil & Gas | Conroe, TX 77301 | Oil & Gas Operator | Dec 2025 |
| 12521 | Wortham Operating, LLC | Holliday, TX 76366 | Oil & Gas Operator | Apr 2023 |
| 12522 | Wortham, E. H. | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |
| 12523 | Wortham, J. R. | Wichita Falls, TX 76310 | Oil & Gas Operator | Aug 2023 |
| 12524 | Wortham, Michael R. | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |
| 12525 | WP Oil & Gas Exploration LLC | Loving, TX 76460 | Oil Operator | Dec 2025 |
| 12526 | WPH Operating Company | Amarillo, TX 79105 | Oil & Gas Operator | Mar 2017 |
| 12527 | WPX Energy Gulf Coast, LP | Benbrook, TX 76126 | Oil & Gas Operator | May 2012 |
| 12528 | WPX Energy Permian, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 12529 | WR Resources, LLC | Jourdanton, TX 78026 | Oil & Gas Operator | Dec 2025 |
| 12530 | Wrath Energy, LLC | Odessa, TX 79760 | Oil Operator | Dec 2025 |
| 12531 | WRD Oil, LLC | Floresville, TX 78114 | Oil & Gas Operator | Dec 2025 |
| 12532 | WRD Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Dec 2025 |
| 12533 | Wright Aurora Enterprises, LLC | Canyon Lake, TX 78133 | Oil & Gas Operator | May 2020 |
| 12534 | Wright Brothers Energy, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Dec 2025 |
| 12535 | Wright Brothers Petroleum, LTD. | San Antonio, TX 78212 | Oil & Gas Operator | May 2002 |
| 12536 | Wright Oil And Gas, LLC | Benbrook, TX 76126 | Oil & Gas Operator | Dec 2025 |
| 12537 | Wright Operating, Inc. | Denison, TX 75020 | Oil & Gas Operator | Dec 2025 |
| 12538 | Wright Trucking, Inc. | Weatherford, OK 73096 | Oil & Gas Operator | Feb 2019 |
| 12539 | Wright, Robert W. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 12540 | Wright, Robert W. Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2000 |
| 12541 | WRT Energy Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | May 1998 |
| 12542 | WS Ritter Critters, LLC | Groom, TX 79039 | Gas Operator | Dec 2025 |
| 12543 | WSF, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2013 |
| 12544 | WSM | New Braunfels, TX 78132 | Oil Operator | Dec 2025 |
| 12545 | WT Fitts Operating | Bowie, TX 76230 | Oil & Gas Operator | Dec 2025 |
| 12546 | WTG Exploration | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 12547 | WTG Exploration Inc | Midland, TX 79705 | Oil & Gas Operator | Dec 2023 |
| 12548 | WTP Energy, Inc. | Snyder, TX 79549 | Oil & Gas Operator | Dec 2025 |
| 12549 | WTR Operating LLC | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 12550 | WTXR Operating (Texas), Inc. | Carrollton, TX 75007 | Oil Operator | Dec 2025 |
| 12551 | WVH Operating LLC | Aledo, TX 76008 | Oil Operator | Dec 2025 |
| 12552 | WX Company LLC | Graham, TX 76450 | Oil & Gas Operator | Apr 2017 |
| 12553 | Wy Woodland Operating, LLC | Covington, TX 76636 | Oil & Gas Operator | Dec 2025 |
| 12554 | Wyatt Permian, LLC | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Dec 2025 |
| 12555 | Wyco Oil & Gas LLC | Odessa, TX 79766 | Oil & Gas Operator | Jan 2024 |
| 12556 | Wylie Bros. Prod. & DRGL. Co,Inc | Baird, TX 79504 | Oil & Gas Operator | Dec 2025 |
| 12557 | Wylie, Fred, Jr. | Moran, TX 76464 | Oil & Gas Operator | Oct 2022 |
| 12558 | Wynco Energy, Inc. | Spring, TX 77393 | Oil & Gas Operator | Dec 2025 |
| 12559 | Wynn-Crosby Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2005 |
| 12560 | Wynn-Crosby Operating, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |
| 12561 | Wynne Petroleum Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Nov 1997 |
| 12562 | Wyoming Diamond A LLC | Cheyenne, WY 82007 | Gas Operator | Dec 2025 |
| 12563 | X-L Energy Company | El Paso, TX 79902 | Oil & Gas Operator | Dec 2025 |
| 12564 | X72 Operating Corp. | Plano, TX 75025 | Oil & Gas Operator | Dec 2025 |
| 12565 | XCL-Texas, Inc. | Lafayette, LA 70503 | Oil & Gas Operator | Nov 2000 |
| 12566 | Xenon Energy, Inc. | Plano, TX 75074 | Oil & Gas Operator | Aug 2003 |
| 12567 | Xeric Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Jul 1997 |
| 12568 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 12569 | Xet, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Aug 2017 |
| 12570 | Xhorizons Energy LLC | Houston, TX 77079 | Oil Operator | Dec 2025 |
| 12571 | Xog Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 12572 | Xog Resources, LLC | Spring, TX 77379 | Oil & Gas Operator | Dec 2025 |
| 12573 | Xophi Energy, LLC | Arlington, TX 76006 | Oil & Gas Operator | Dec 2025 |
| 12574 | Xplor Energy Operating Co. | Houston, TX 77079 | Oil & Gas Operator | Jan 2012 |
| 12575 | Xplore Operating, LLC | Arlington, TX 76001 | Oil & Gas Operator | Dec 2025 |
| 12576 | Xstar Resources LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Dec 2025 |
| 12577 | Xta Resources LLC | Uvalde, TX 78801 | Oil & Gas Operator | Dec 2025 |
| 12578 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Dec 2025 |
| 12579 | XTO Offshore Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2010 |
| 12580 | Xtra Energy, LLC | Fort Worth, TX 76161 | Oil & Gas Operator | Dec 2025 |
| 12581 | Xtreme Operating Company LLC | Flower Mound, TX 75022 | Oil Operator | Dec 2025 |
| 12582 | Xyz Oil, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Dec 2025 |
| 12583 | Y Oil Company Inc. | Cameron, TX 76520 | Oil & Gas Operator | Dec 2025 |
| 12584 | Yale Oil Association | Oklahoma City, OK 73105 | Gas Operator | Oct 2013 |
| 12585 | Yale Oil Association, Inc. | Oklahoma City, OK 73105 | Oil & Gas Operator | Nov 2025 |
| 12586 | Yanahosa, Inc. | Kountze, TX 77625 | Oil Operator | Dec 2025 |
| 12587 | Yarberry Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 12588 | Yarberry, E. E. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2015 |
| 12589 | Yarborough Oil & Gas L.P. | Midland, TX 79701 | Oil & Gas Operator | Oct 2000 |
| 12590 | Yarborough, W. B. | Midland, TX 79701 | Oil & Gas Operator | Nov 1995 |
| 12591 | Yates Drilling Company | Artesia, NM 88210 | Oil & Gas Operator | Dec 2021 |
| 12592 | Yates Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Dec 2025 |
| 12593 | Yates Industries, LLC | Santa Fe, NM 87501 | Oil & Gas Operator | Dec 2025 |
| 12594 | Yates Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 12595 | Yates, Harvey E. Company | Roswell, NM 88201 | Oil & Gas Operator | Dec 2002 |
| 12596 | Yeates Development Corporation | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 12597 | Yeates, F. L. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 1997 |
| 12598 | Yegen E C | Casper, WY 82604 | Oil & Gas Operator | Mar 2015 |
| 12599 | Yellow Rose Oil & Gas Oper. Inc. | Cisco, TX 76437 | Oil & Gas Operator | Dec 2025 |
| 12600 | Yellow Rose Oil & Gas Operating | Cisco, TX 76437 | Oil & Gas Operator | Jan 1996 |