| 501 | World Energy Corporation | Laredo, TX 78041 | Oil & Gas Operator | Aug 2003 |
| 502 | World Hydrocarbon, Inc. | Kaufman, TX 75142 | Gas Operator | Apr 1995 |
| 503 | World Producers, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1994 |
| 504 | Worldwide Energy Corp. | Freer, TX 78357 | Oil & Gas Operator | Jan 1997 |
| 505 | Worldwide Exploration, Inc | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2002 |
| 506 | Worsham-Steed Gas Storage, L.P. | Houston, TX 77002 | Oil & Gas Operator | Aug 2010 |
| 507 | Worsham-Steed Gas Storage, LLC | Tulsa, OK 74172 | Oil & Gas Operator | Apr 2024 |
| 508 | Wortham Oil & Gas | Conroe, TX 77301 | Oil & Gas Operator | Apr 2024 |
| 509 | Wortham Operating, LLC | Holliday, TX 76366 | Oil & Gas Operator | Apr 2023 |
| 510 | Wortham, E. H. | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |
| 511 | Wortham, J. R. | Wichita Falls, TX 76310 | Oil & Gas Operator | Aug 2023 |
| 512 | Wortham, Michael R. | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |
| 513 | WP Oil & Gas Exploration LLC | Loving, TX 76460 | Oil Operator | Apr 2024 |
| 514 | WPH Operating Company | Amarillo, TX 79105 | Oil & Gas Operator | Mar 2017 |
| 515 | WPX Energy Gulf Coast, LP | Benbrook, TX 76126 | Oil & Gas Operator | May 2012 |
| 516 | WPX Energy Permian, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2024 |
| 517 | WRD Oil, LLC | Floresville, TX 78114 | Oil & Gas Operator | Apr 2024 |
| 518 | WRD Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 519 | Wright Brothers Energy, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Apr 2024 |
| 520 | Wright Brothers Petroleum, LTD. | San Antonio, TX 78212 | Oil & Gas Operator | May 2002 |
| 521 | Wright Oil And Gas, LLC | Benbrook, TX 76126 | Oil & Gas Operator | Apr 2024 |
| 522 | Wright Operating, Inc. | Denison, TX 75020 | Oil & Gas Operator | Apr 2024 |
| 523 | Wright Trucking, Inc. | Weatherford, OK 73096 | Oil & Gas Operator | Feb 2019 |
| 524 | Wright, Robert W. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 525 | Wright, Robert W. Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2000 |
| 526 | WRT Energy Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | May 1998 |
| 527 | WSF, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2013 |
| 528 | WSM | New Braunfels, TX 78132 | Oil Operator | Apr 2024 |
| 529 | WSM LLC | New Braunfels, TX 78132 | Oil Operator | Apr 2024 |
| 530 | WT Fitts Operating | Bowie, TX 76230 | Oil & Gas Operator | Apr 2024 |
| 531 | WTG Exploration | Midland, TX 79705 | Oil & Gas Operator | Apr 2024 |
| 532 | WTG Exploration Inc | Midland, TX 79705 | Oil & Gas Operator | Dec 2023 |
| 533 | WTP Energy, Inc. | Snyder, TX 79549 | Oil & Gas Operator | Apr 2024 |
| 534 | WTXR Operating (Texas), Inc. | Carrollton, TX 75007 | Oil Operator | Apr 2024 |
| 535 | Wy Woodland Operating, LLC | Covington, TX 76636 | Oil & Gas Operator | Apr 2024 |
| 536 | Wyatt Permian, LLC | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Apr 2024 |
| 537 | Wyco Oil & Gas LLC | Odessa, TX 79766 | Oil & Gas Operator | Apr 2024 |
| 538 | Wylie Bros. Prod. & DRGL. Co,Inc | Baird, TX 79504 | Oil & Gas Operator | Apr 2024 |
| 539 | Wylie, Fred, Jr. | Moran, TX 76464 | Oil & Gas Operator | Oct 2022 |
| 540 | Wynco Energy, Inc. | Spring, TX 77393 | Oil & Gas Operator | Apr 2024 |
| 541 | Wynn-Crosby Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2005 |
| 542 | Wynn-Crosby Operating, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |
| 543 | Wynne Petroleum Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Nov 1997 |
| 544 | Wyoming Diamond A LLC | Cheyenne, WY 82007 | Gas Operator | Apr 2024 |