| 801 | True Wolf Operating, LLC | Iowa Park, TX 76367 | Oil Operator | May 2025 |
| 802 | Trumter Petroleum Corporation | Fort Worth, TX 76185 | Oil & Gas Operator | Aug 1998 |
| 803 | Tucker Resources, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2003 |
| 804 | Turnbow Drilling Co. | Holliday, TX 76366 | Oil & Gas Operator | May 2025 |
| 805 | Tuthill & Barbee | Amarillo, TX 79101 | Oil & Gas Operator | Nov 1994 |
| 806 | Twilco Operating LLC | Holliday, TX 76366 | Oil Operator | May 2025 |
| 807 | Twin Oaks Construction Company | Irving, TX 75063 | Oil & Gas Operator | May 2025 |
| 808 | Txon Partners, LLC | Houston, TX 77057 | Oil & Gas Operator | Jun 2017 |
| 809 | Tyco Operating Co. | Archer City, TX 76351 | Oil & Gas Operator | May 2025 |
| 810 | Ultra Oil & Gas, Inc. | Centerton, AR 72719 | Oil & Gas Operator | May 2025 |
| 811 | Underwood, Jim | Graham, TX 76450 | Oil & Gas Operator | Mar 2018 |
| 812 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | May 2025 |
| 813 | United Operating Company | Olney, TX 76374 | Oil & Gas Operator | Aug 2003 |
| 814 | United Operating, LLC *** | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 815 | United Texas Petroleum Inc. | McKinney, TX 75070 | Oil & Gas Operator | May 2025 |
| 816 | Universal Resources Corp. | Salt Lake Cty, UT 84145 | Oil & Gas Operator | Jan 2000 |
| 817 | Upda Operators, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Dec 2009 |
| 818 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | May 2025 |
| 819 | Us Energy Holdings, LLC | Richardson, TX 75080 | Oil & Gas Operator | May 2025 |
| 820 | Utility Ventures Company | Pasadena, TX 77504 | Oil & Gas Operator | May 2025 |
| 821 | V S Oil Company | Burkburnett, TX 76354 | Oil & Gas Operator | May 2025 |
| 822 | Vandermeer Energy Corp. | Dallas, TX 75225 | Oil & Gas Operator | Nov 1998 |
| 823 | Vanek, R. J. | Iowa Park, TX 76367 | Oil & Gas Operator | May 2025 |
| 824 | Veitenheimer Oil Co. | Windthorst, TX 76389 | Oil Operator | May 2025 |
| 825 | Veneto Exploration, LLC | Richardson, TX 75083 | Oil & Gas Operator | May 2025 |
| 826 | Veteran Exploration & Prod, LLC | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 827 | Viejo Services, LLC | Boyd, TX 76023 | Oil & Gas Operator | May 2025 |
| 828 | Viola Production Inc | Dallas, TX 75251 | Oil & Gas Operator | May 2025 |
| 829 | Voil Petroleum | Olney, TX 76374 | Oil & Gas Operator | Aug 2004 |
| 830 | Vortt Exploration Company, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2019 |
| 831 | Voyles, James | Wichita Falls, TX 76301 | Oil & Gas Operator | Jun 1996 |
| 832 | W & W Production, LLC | Wichita Falls, TX 76308 | Oil Operator | May 2025 |
| 833 | W.T. Waggoner Estate, Inc. | Vernon, TX 76385 | Oil Operator | May 2025 |
| 834 | Waco Production Co. | Archer City, TX 76351 | Oil & Gas Operator | Sep 1993 |
| 835 | Wade, Jim | Olney, TX 76374 | Oil & Gas Operator | May 2025 |
| 836 | Waggoner, W. T., Estate | Vernon, TX 76385 | Oil & Gas Operator | Feb 2018 |
| 837 | Walker Operating (I) | Wichita Falls, TX 76308 | Oil Operator | May 2025 |
| 838 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | May 2025 |
| 839 | Walter Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | May 2009 |
| 840 | Walton Producing Company | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2005 |
| 841 | Walton, W. W. | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 1994 |
| 842 | Watson Energy Investments, LLC | Tulsa, OK 74103 | Oil & Gas Operator | May 2025 |
| 843 | Well Recycling Company | Olney, TX 76374 | Oil Operator | Aug 2005 |
| 844 | Wells Oilfield Services, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 845 | Wes-Mor Drilling, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 846 | Western Chief Oil & Gas Company | Graham, TX 76450 | Oil & Gas Operator | Jul 2009 |
| 847 | Westridge Oil & Gas Properties | Mineral Wells, TX 76068 | Oil & Gas Operator | May 2025 |
| 848 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Mar 2025 |
| 849 | WFW Production Company, Inc. | Muenster, TX 76252 | Oil & Gas Operator | May 2025 |
| 850 | Whitaker, Jerry | Sunset, TX 76270 | Oil & Gas Operator | May 2022 |
| 851 | White Knight Production LLC | Lafayette, LA 70505 | Oil & Gas Operator | Feb 2024 |
| 852 | Whitehead Prod. Co., Inc. | Humble, TX 77338 | Oil & Gas Operator | Mar 2025 |
| 853 | Whitfield Energy | Midland, TX 79702 | Oil & Gas Operator | Jan 1999 |
| 854 | Wilcox Energy Company LLC | Rule, TX 79547 | Oil & Gas Operator | May 2025 |
| 855 | Wilcox Oil Company | Rule, TX 79547 | Oil & Gas Operator | Aug 2008 |
| 856 | Williams, A. Oil | Wichita Falls, TX 76308 | Oil Operator | May 2025 |
| 857 | Willowbend Investments, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2025 |
| 858 | Wilson Operating Co. | Archer City, TX 76351 | Oil & Gas Operator | May 2025 |
| 859 | Wilton, Frank | Graham, TX 76450 | Oil & Gas Operator | Oct 2016 |
| 860 | Winfrey Oil Co., Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2016 |
| 861 | Wise Production Company | Bowie, TX 76230 | Oil & Gas Operator | May 2025 |
| 862 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 863 | Witherspoon Oil Co | Iowa Park, TX 76367 | Oil & Gas Operator | May 2025 |
| 864 | Wolf, Gene | Windthorst, TX 76389 | Oil & Gas Operator | Apr 2003 |
| 865 | Wolf, Gene L.L.C. | Windthorst, TX 76389 | Oil & Gas Operator | May 2025 |
| 866 | Wolfson, I. J. | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2002 |
| 867 | Wolsey Oil Inc. | Bowie, TX 76230 | Oil & Gas Operator | Oct 2013 |
| 868 | Woods, W.A. Oil Co. | Holliday, TX 76366 | Oil & Gas Operator | Dec 1993 |
| 869 | Wortham Operating, LLC | Holliday, TX 76366 | Oil & Gas Operator | Apr 2023 |
| 870 | Wortham, E. H. | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |
| 871 | Wortham, J. R. | Wichita Falls, TX 76310 | Oil & Gas Operator | Aug 2023 |
| 872 | Xophi Energy, LLC | Arlington, TX 76006 | Oil & Gas Operator | May 2025 |
| 873 | Xstar Resources LLC | Jacksboro, TX 76458 | Oil & Gas Operator | May 2025 |
| 874 | Yarberry Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 875 | Yarberry, E. E. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2015 |
| 876 | Yellow Rose Oil & Gas Oper. Inc. | Cisco, TX 76437 | Oil & Gas Operator | May 2025 |
| 877 | Yet Profits, L.L.C. | Wichita Falls, TX 76308 | Oil Operator | May 2025 |
| 878 | Yobel, Inc. | Olney, TX 76374 | Oil & Gas Operator | May 2025 |
| 879 | Z&G Operating | Wichita Falls, TX 76302 | Oil Operator | Sep 2011 |