| 601 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 602 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2025 |
| 603 | United Resources LP A Texas LMTD PRNTSHP | Austin, TX 78746 | Oil & Gas Operator | Sep 2003 |
| 604 | V-F Petroleum Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 605 | Vanguard Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Feb 2021 |
| 606 | Vernon E. Faulconer, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Dec 2024 |
| 607 | Vinson Exploration, Inc. | Midland, TX 79701 | Gas Operator | Dec 2020 |
| 608 | Vintage Drilling LLC | Artesia, NM 88211024 | Oil & Gas Operator | Feb 2025 |
| 609 | Vintage Petroleum, LLC | Houston, TX 77210 | Oil & Gas Operator | Dec 2019 |
| 610 | Vision Energy Inc | Carlsbad, NM 88221 | Oil & Gas Operator | Aug 2022 |
| 611 | Vista Resources Of Texas, Inc. | Midland, TX 79701 | Oil & Gas Operator | Feb 2000 |
| 612 | W & W Oil, Inc. | Lovington, NM 88260 | Oil & Gas Operator | May 1999 |
| 613 | W E Jeffers | Artesia, NM 88210 | Oil Operator | Nov 2004 |
| 614 | W J Sweatt | Artesoa, NM 88211 | Oil Operator | Oct 2020 |
| 615 | W R Ericksen | Hobbs, NM 882411109 | Oil & Gas Operator | Jul 1994 |
| 616 | W. A. Moncrief, Jr. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 617 | Wadi Petroleum Inc | Houston, TX 77014 | Oil & Gas Operator | May 2018 |
| 618 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 619 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Apr 2025 |
| 620 | Warren E & P Inc | Dallas, TX 75240 | Oil & Gas Operator | Dec 2024 |
| 621 | Waylander LLC | Plano, TX 75025 | Oil Operator | Feb 2025 |
| 622 | Wayne Head | Artesia, NM 88210 | Oil & Gas Operator | Apr 2009 |
| 623 | Wayne Moore | Midland, TX 79701 | Oil & Gas Operator | May 1997 |
| 624 | Westall-Mask | Roswell, NM 88201 | Oil & Gas Operator | Dec 1994 |
| 625 | Westbrook Oil Corp | Jal, NM 88252 | Oil & Gas Operator | May 2018 |
| 626 | Western Oil Producers Inc | Roswell, NM 88202 | Oil & Gas Operator | Jul 2005 |
| 627 | Western Reserves Oil Co Inc | Midland, TX 79705 | Oil & Gas Operator | Oct 2020 |
| 628 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 629 | Wildcat Energy, LLC | Odessa, TX 79768 | Oil & Gas Operator | Jul 2021 |
| 630 | Willow Creek Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2009 |
| 631 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 632 | Woodbine Petroleum, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Aug 2003 |
| 633 | WPX Energy Permian, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2025 |
| 634 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 635 | Xog Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 636 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2025 |
| 637 | XTO Permian Operating LLC. | Midland, TX 79707 | Oil & Gas Operator | Feb 2025 |
| 638 | Yates Drilling Company | Artesia, NM 88210 | Oil & Gas Operator | Dec 2021 |
| 639 | Yates Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Apr 2025 |
| 640 | Yeso Energy, Inc. | Roswell, NM 88202 | Oil & Gas Operator | May 2007 |
| 641 | Zimmerman Oil & Gas Exploration, Inc. | Lovington, NM 88260 | Oil & Gas Operator | Mar 2025 |