| 601 | Torch Energy Services, Inc. | Houston, TX 77010 | Oil & Gas Operator | Sep 2011 |
| 602 | Trek Operating, LLC | Tulsa, OK 741520098 | Oil & Gas Operator | Mar 2021 |
| 603 | Trilogy Operating, Inc. | Midland, TX 79708 | Oil & Gas Operator | Apr 2026 |
| 604 | Trinity River Energy, LLC | Houston, TX 77094 | Oil & Gas Operator | Aug 2015 |
| 605 | Trinity University & Closuit | Loco Hills, NM 88255 | Oil & Gas Operator | Dec 2002 |
| 606 | Tritex Resources, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2009 |
| 607 | TRP Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Apr 2026 |
| 608 | U. S. Energy Development Corporation | Fort Worth, TX 76164 | Oil & Gas Operator | Apr 2026 |
| 609 | Uhc New Mexico Corporation | Midland, TX 79702 | Oil & Gas Operator | Feb 2007 |
| 610 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 611 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2026 |
| 612 | United Resources LP A Texas LMTD PRNTSHP | Austin, TX 78746 | Oil & Gas Operator | Sep 2003 |
| 613 | V-F Petroleum Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 614 | Vanguard Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 615 | Vernon E. Faulconer, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Dec 2024 |
| 616 | Vinson Exploration, Inc. | Midland, TX 79701 | Gas Operator | Dec 2020 |
| 617 | Vintage Drilling LLC | Artesia, NM 88211024 | Oil & Gas Operator | Feb 2026 |
| 618 | Vintage Petroleum, LLC | Houston, TX 77210 | Oil & Gas Operator | Dec 2019 |
| 619 | Vision Energy Inc | Carlsbad, NM 88221 | Oil & Gas Operator | Aug 2022 |
| 620 | Vista Resources Of Texas, Inc. | Midland, TX 79701 | Oil & Gas Operator | Feb 2000 |
| 621 | W & W Oil, Inc. | Lovington, NM 88260 | Oil & Gas Operator | May 1999 |
| 622 | W A Moncrief Jr | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2026 |
| 623 | W E Jeffers | Artesia, NM 88210 | Oil Operator | Nov 2004 |
| 624 | W J Sweatt | Artesoa, NM 88211 | Oil Operator | Oct 2020 |
| 625 | W R Ericksen | Hobbs, NM 882411109 | Oil & Gas Operator | Jul 1994 |
| 626 | Wadi Petroleum Inc | Houston, TX 77014 | Oil & Gas Operator | May 2018 |
| 627 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2026 |
| 628 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Apr 2026 |
| 629 | Warren E & P Inc | Dallas, TX 75240 | Oil & Gas Operator | Dec 2025 |
| 630 | Waylander LLC | Plano, TX 75025 | Oil & Gas Operator | Apr 2026 |
| 631 | Wayne Head | Artesia, NM 88210 | Oil & Gas Operator | Apr 2009 |
| 632 | Wayne Moore | Midland, TX 79701 | Oil & Gas Operator | May 1997 |
| 633 | Westall-Mask | Roswell, NM 88201 | Oil & Gas Operator | Dec 1994 |
| 634 | Westbrook Oil Corp | Jal, NM 88252 | Oil & Gas Operator | May 2018 |
| 635 | Western Oil Producers Inc | Roswell, NM 88202 | Oil & Gas Operator | Jul 2005 |
| 636 | Western Reserves Oil Co Inc | Midland, TX 79705 | Oil & Gas Operator | Oct 2020 |
| 637 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2026 |
| 638 | Wildcat Energy, LLC | Odessa, TX 79768 | Oil & Gas Operator | Jul 2021 |
| 639 | Willow Creek Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2009 |
| 640 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 641 | Woodbine Petroleum, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Aug 2003 |
| 642 | WPX Energy Permian, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2026 |
| 643 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 644 | Xog Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 645 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2026 |
| 646 | XTO Permian Operating LLC. | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 647 | Yates Drilling Company | Artesia, NM 88210 | Oil & Gas Operator | Dec 2021 |
| 648 | Yates Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Apr 2026 |
| 649 | Yeso Energy, Inc. | Roswell, NM 88202 | Oil & Gas Operator | May 2007 |
| 650 | Zimmerman Oil & Gas Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |