| 701 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2025 |
| 702 | United Resources LP | Austin, TX 78746 | Oil & Gas Operator | Oct 2011 |
| 703 | United Texas Oil LLC | Houston, TX 77027 | Oil & Gas Operator | Apr 2025 |
| 704 | Universal Geopower LLC | Houston, TX 77057 | Oil & Gas Operator | May 2016 |
| 705 | Validus Operating Inc. | Port Aransas, TX 78373 | Oil & Gas Operator | Oct 1998 |
| 706 | Valley Gathering Company | Midland, TX 79702 | Oil & Gas Operator | Feb 1997 |
| 707 | Vantage Operating, LLC | San Antonio, TX 78230 | Oil & Gas Operator | Apr 2025 |
| 708 | Vaquero Operating | FT Stockton, TX 79735 | Oil & Gas Operator | Apr 2025 |
| 709 | Vaughn Petroleum, Inc. | Dallas, TX 75219 | Oil & Gas Operator | May 2004 |
| 710 | Ventex Operating Corp. | Addison, TX 75001 | Oil & Gas Operator | Apr 2025 |
| 711 | Ventura Oil & Gas Company | San Antonio, TX 78205 | Oil & Gas Operator | Mar 2002 |
| 712 | Venus Oil Company | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2002 |
| 713 | Verus Energy, Inc | Houston, TX 77098 | Oil & Gas Operator | Sep 2004 |
| 714 | Victoria Operating, Inc. | Victoria, TX 77903 | Oil & Gas Operator | Apr 2025 |
| 715 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Jan 2025 |
| 716 | Viola Prod., Inc. | Dallas, TX 75251 | Oil & Gas Operator | Apr 2025 |
| 717 | Virtex Petroleum Company, Inc. | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Jan 2008 |
| 718 | Wadi Petroleum Inc | Houston, TX 77014 | Oil & Gas Operator | May 2018 |
| 719 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 720 | Wagner, Duer & Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 1999 |
| 721 | Wallis Energy, Inc. | Austin, TX 78746 | Oil & Gas Operator | Apr 2025 |
| 722 | Walter Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 723 | Warwick Oil & Gas, Inc. | Houston, TX 77098 | Oil & Gas Operator | Feb 1993 |
| 724 | Waters Eng. & Operating, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Sep 2013 |
| 725 | Weber Energy Corporation | Dallas, TX 75219 | Oil & Gas Operator | Feb 2017 |
| 726 | Welder Exploration & Prod., Inc. | San Antonio, TX 78212 | Oil & Gas Operator | Dec 2022 |
| 727 | Welder Operating, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Mar 2001 |
| 728 | Welder-Heyer Energy, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Feb 2001 |
| 729 | Welderxp LTD. | San Antonio, TX 78212 | Oil & Gas Operator | Apr 2025 |
| 730 | Western Energy Group, LLC | Leander, TX 78641 | Oil & Gas Operator | Apr 2025 |
| 731 | Westhall Associates, Inc. | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Aug 1997 |
| 732 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 733 | White Creek Energy | Three Rivers, TX 78071 | Oil & Gas Operator | Apr 2025 |
| 734 | White Oak Operating Company LLC | Houston, TX 77077 | Oil & Gas Operator | Apr 2025 |
| 735 | White Stride LLC | Piedmont, OK 73078 | Oil & Gas Operator | Apr 2025 |
| 736 | Williamson Oil & Gas, Inc. | Shreveport, LA 71166 | Oil & Gas Operator | Dec 2024 |
| 737 | Winchester Energy Operating Co. | Austin, TX 78746 | Oil & Gas Operator | Apr 2025 |
| 738 | Winn Exploration Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2025 |
| 739 | Wisenbaker Production Company | Tyler, TX 75702 | Oil & Gas Operator | Oct 2011 |
| 740 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 741 | Wofford, C. J. | El Campo, TX 77437 | Oil & Gas Operator | Apr 2025 |
| 742 | Wolverine Exploration Company | Houston, TX 77002 | Oil & Gas Operator | May 2019 |
| 743 | Woodlands Oil And Gas Inc. | The Woodlands, TX 77380 | Gas Operator | Jan 2014 |
| 744 | Wynn-Crosby Operating, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2025 |
| 745 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 746 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2025 |
| 747 | Yuma E & P Company, Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2025 |
| 748 | Yuma Petroleum Company | Houston, TX 77027 | Oil & Gas Operator | Aug 2002 |
| 749 | Zachry Exploration, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Apr 2025 |
| 750 | Zilkha Energy Company | Houston, TX 77046 | Oil & Gas Operator | Oct 2002 |
| 751 | Zinke & Trumbo, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2007 |
| 752 | Zinn Petroleum Co. | Houston, TX 77024 | Oil & Gas Operator | Nov 2021 |