| 601 | Venus Exploration, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Jul 2013 |
| 602 | Venus Oil Company | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2002 |
| 603 | Viola Prod., Inc. | Dallas, TX 75251 | Oil & Gas Operator | Dec 2024 |
| 604 | Vista Resources, Inc. (A) | Midland, TX 79701 | Oil & Gas Operator | Feb 2000 |
| 605 | Vital Energy, Inc. | Tulsa, OK 74120 | Oil & Gas Operator | Dec 2024 |
| 606 | Walbet | Monahans, TX 79756 | Oil & Gas Operator | Dec 1993 |
| 607 | Walbet, Inc. | Monahans, TX 79756 | Oil & Gas Operator | Dec 2024 |
| 608 | Walker, Kent | Midland, TX 79704 | Oil & Gas Operator | Jun 2004 |
| 609 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Dec 2024 |
| 610 | Watson Packer Employee Fund | Monahans, TX 79756 | Oil & Gas Operator | Dec 2024 |
| 611 | WCWB Energy, LLC | Midland, TX 79701 | Oil Operator | Sep 2015 |
| 612 | West Bay Exploration Company | Muenster, TX 76252 | Oil & Gas Operator | Sep 2024 |
| 613 | Westar Energy, Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 2008 |
| 614 | Western DRLG. Co. | Longview, TX 75604 | Oil & Gas Operator | Nov 1996 |
| 615 | Western Reserves Oil Co Inc | Midland, TX 79705 | Oil & Gas Operator | Oct 2020 |
| 616 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 617 | Wheeler Operating Corporation | Fort Worth, TX 76101 | Oil & Gas Operator | Dec 2024 |
| 618 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 619 | Wilbanks, Bruce A. | Midland, TX 79701 | Oil & Gas Operator | Aug 1996 |
| 620 | Wilco Operating | Monahans, TX 79756 | Oil & Gas Operator | Dec 2024 |
| 621 | Wild Cat Operating Company | Victoria, TX 77903 | Oil & Gas Operator | Mar 2008 |
| 622 | Williams Oil Company | Midland, TX 79710 | Oil & Gas Operator | Dec 2024 |
| 623 | Wind River Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2024 |
| 624 | Wind River Resources Inc | Tulsa, OK 74136-6381 | Oil & Gas Operator | Jun 2010 |
| 625 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
| 626 | WJC, Inc. | Post, TX 79356 | Oil & Gas Operator | Dec 2024 |
| 627 | Wood, McShane & Thams | Midland, TX 79702 | Oil & Gas Operator | Oct 1995 |
| 628 | Wrath Energy, LLC | Odessa, TX 79760 | Oil Operator | Dec 2024 |
| 629 | WTG Exploration | Midland, TX 79705 | Oil & Gas Operator | Dec 2024 |
| 630 | Wyco Oil & Gas LLC | Odessa, TX 79766 | Oil & Gas Operator | Jan 2024 |
| 631 | Wynco Energy, Inc. | Spring, TX 77393 | Oil & Gas Operator | Dec 2024 |
| 632 | Xeric Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Jul 1997 |
| 633 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 634 | Xog Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2024 |
| 635 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Dec 2024 |
| 636 | Yates Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 637 | Younger Energy Company | Wichita, KS 67206 | Oil & Gas Operator | Dec 2024 |
| 638 | Yucca Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2024 |
| 639 | Zachry Oil And Gas Properties | Midland, TX 79708 | Oil & Gas Operator | Dec 2024 |
| 640 | Zarvona Energy LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |