| 501 | Verdugo-Pablo Energy, LLC | Amarillo, TX 79105 | Oil & Gas Operator | Nov 2024 |
| 502 | Vision Minerals, LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 503 | Vista Resources, Inc. (A) | Midland, TX 79701 | Oil & Gas Operator | Feb 2000 |
| 504 | Vogel, A. J., Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 1994 |
| 505 | Voskamp Exploration, Inc. | Midland, TX 79708 | Oil & Gas Operator | Sep 2010 |
| 506 | Wacker Oil Inc. | Houston, TX 77002 | Oil & Gas Operator | Aug 1996 |
| 507 | Walkabout Operating, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Sep 2026 |
| 508 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Sep 2026 |
| 509 | Walsh Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2022 |
| 510 | Walter Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2026 |
| 511 | Warren American Oil Co | Tulsa, OK 74147 | Oil & Gas Operator | Jun 2026 |
| 512 | Warren American Oil Company LLC | Tulsa, OK 74147 | Oil & Gas Operator | Sep 2026 |
| 513 | Warrior Exploration LLC | Sapulpa, OK 74067-1912 | Oil & Gas Operator | Mar 2026 |
| 514 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 515 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 516 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Jun 2026 |
| 517 | WG Oil, LLC | Wichita Falls, TX 76308 | Oil Operator | Sep 2026 |
| 518 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Sep 2026 |
| 519 | White Stride LLC | Piedmont, OK 73078 | Oil & Gas Operator | Sep 2026 |
| 520 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2026 |
| 521 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Jan 2025 |
| 522 | Wilbanks Exploration Inc | Denver, CO 80202 | Oil & Gas Operator | May 2002 |
| 523 | Wilbanks Reserve Corporation | Denver, CO 80203 | Oil & Gas Operator | Sep 2026 |
| 524 | Wilco Properties, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Jan 2004 |
| 525 | Williamson, J. C. | Midland, TX 79701 | Oil & Gas Operator | Jan 2001 |
| 526 | Williamson, Ralph E. | Midland, TX 79702 | Oil & Gas Operator | Jan 2012 |
| 527 | Wilson Operating Service Inc | Brownfield, TX 79316 | Oil & Gas Operator | Aug 2003 |
| 528 | Wilson, Don H., Inc. | Elkhart, TX 75839 | Oil & Gas Operator | May 2019 |
| 529 | Winchester Energy, LLC | Houston, TX 77056 | Oil & Gas Operator | Sep 2026 |
| 530 | Windy Cove Energy II, LLC | Houston, TX 77079 | Oil & Gas Operator | Sep 2020 |
| 531 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 532 | Wishbone Texas Operating Co LLC | Houston, TX 77064 | Oil & Gas Operator | Jul 2019 |
| 533 | Woodbine Production Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2026 |
| 534 | WTG Exploration Inc | Midland, TX 79705 | Oil & Gas Operator | Dec 2023 |
| 535 | Wynn-Crosby Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2005 |
| 536 | Xog Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 537 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Sep 2026 |
| 538 | Young, Marshall R., Oil Co. | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2011 |
| 539 | Yucca Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 540 | Yuma E & P Company, Inc. | Houston, TX 77027 | Oil & Gas Operator | Sep 2026 |