| 801 | Three Sands Oil Inc | Perry, OK 73077 | Oil & Gas Operator | May 2023 |
| 802 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 803 | Tidemark Exploration Inc | Tulsa, OK 74120 | Oil & Gas Operator | Apr 2019 |
| 804 | Tilley Oil & Gas, Inc. | Oklahoma City, OK 73172 | Oil & Gas Operator | Dec 2024 |
| 805 | TLS Oil & Gas Inc | Kingfisher, OK 73750-0901 | Oil & Gas Operator | Sep 2024 |
| 806 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2024 |
| 807 | Toland & Johnston Inc | Edmond, OK 73034 | Oil & Gas Operator | Oct 2024 |
| 808 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 809 | Total Petroleum Inc | Denver, CO 80201-0500 | Oil & Gas Operator | Nov 2006 |
| 810 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 811 | Tpet, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Mar 2008 |
| 812 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Sep 2024 |
| 813 | Transfuel Resources Co | Houston, TX 77215 | Oil & Gas Operator | Aug 2013 |
| 814 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 815 | Travis Peak Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2024 |
| 816 | Traynor Oil & Gas Inc | Claremont, CA 91711-2837 | Oil & Gas Operator | Jan 2024 |
| 817 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Dec 2024 |
| 818 | Trepco Production Company, Inc. | Yukon, OK 73099 | Oil & Gas Operator | Sep 2024 |
| 819 | Trey Resources Inc. | Midland, TX 79710 | Oil & Gas Operator | Oct 2024 |
| 820 | Triad Of Oklahoma Inc | | Oil & Gas Operator | Feb 1996 |
| 821 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |
| 822 | Trineha Inc | Ardmore, OK 73402-2478 | Oil & Gas Operator | Jun 2009 |
| 823 | Tripledee Drilling Co Inc | Ardmore, OK 73402-1888 | Oil & Gas Operator | Dec 2015 |
| 824 | Triplett Larry W | Oklahoma City, OK 73112-5325 | Oil & Gas Operator | Mar 2015 |
| 825 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 826 | Triumph Energy Partners LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | Sep 2024 |
| 827 | Triumph Resources Inc | Oklahoma City, OK 73114 | Oil & Gas Operator | Nov 2004 |
| 828 | Tucson Oil & Gas Inc | | Oil & Gas Operator | Aug 1994 |
| 829 | Tulsa Energy Partners LLC | Tulsa, OK 74103-4461 | Oil & Gas Operator | Sep 2024 |
| 830 | Turner Oil Company | Yale, OK 74085-0234 | Oil & Gas Operator | Nov 2014 |
| 831 | Turner Resources Inc | Hennessey, OK 73742 | Oil & Gas Operator | Sep 2024 |
| 832 | Twenty/Twenty Oil & Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Sep 2024 |
| 833 | Twisted Resources Inc | Blanchard, OK 73010-8463 | Oil & Gas Operator | Oct 2024 |
| 834 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 835 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |
| 836 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 837 | Unicon Producing Company | Houston, TX 75252 | Gas Operator | Mar 1994 |
| 838 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 839 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Dec 2024 |
| 840 | United Energy Operating, LLC | Edmond, OK 73083 | Oil & Gas Operator | Dec 2024 |
| 841 | United Energy Trading LLC | Tulsa, OK 74133 | Gas Operator | Feb 2015 |
| 842 | United Oil Corporation | Denver, CO 80202-3813 | Oil & Gas Operator | Sep 2024 |
| 843 | United Production Company LLC | Edmond, OK 73003 | Oil & Gas Operator | Oct 2024 |
| 844 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Dec 2024 |
| 845 | Validus Energy II Midcon LLC | Denever, CO 80202 | Oil & Gas Operator | Sep 2024 |
| 846 | Valjohn Energy Corporation | Oklahoma City, OK 73142-6090 | Oil & Gas Operator | Sep 2024 |
| 847 | Vaquero Gas Company,Incorporated | Houston, TX 77002 | Oil & Gas Operator | Dec 1996 |
| 848 | Vaquero Resources, LLC | Edmond, OK 73034 | Oil & Gas Operator | Oct 2024 |
| 849 | Veenker Resources, Inc. | Oklahoma City, OK 73113 | Oil & Gas Operator | Oct 2024 |
| 850 | Ventana Exploration And Production II LLC | Oklahoma City, OK 73134-2519 | Oil & Gas Operator | Sep 2024 |
| 851 | Viersen & Cochran Drilling Company | | Oil & Gas Operator | May 2015 |
| 852 | Vintage Gas Inc | Tulsa, OK 74119-1029 | Oil & Gas Operator | Jun 2007 |
| 853 | Vintage Marketing Inc | Tulsa, OK 74172 | Oil & Gas Operator | Apr 2003 |
| 854 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Sep 2024 |
| 855 | Vintage Pipeline Inc | Tulsa, OK 74119-1029 | Oil & Gas Operator | Sep 2004 |
| 856 | Vista Energy Inc | Yukon, OK 73085-0827 | Oil & Gas Operator | Mar 2015 |
| 857 | Vitol Inc | Houston, TX 77002 | Oil & Gas Operator | Sep 2023 |
| 858 | VRC Oil & Gas Operating Co | Oklahoma City, OK 73116-1431 | Oil & Gas Operator | Jun 2019 |
| 859 | W C T Operating LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Oct 2024 |
| 860 | W S Crude Oil Purchasing Inc | Oklahoma City, OK 73129-7613 | Oil & Gas Operator | May 2008 |
| 861 | Walker Corporation (The) | Oklahoma City, OK 73156 | Oil & Gas Operator | May 2006 |
| 862 | Wallace Oil & Gas Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Dec 2024 |
| 863 | Walsh Jr F Howard | Fort Worth, TX 76102-4773 | Oil & Gas Operator | Sep 2024 |
| 864 | Wapi Operating LLC | McCurtain, OK 74944 | Oil Operator | Sep 2024 |
| 865 | Ward Gas Marketing Inc | Enid, OK 73702 | Oil & Gas Operator | Sep 2011 |
| 866 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Sep 2024 |
| 867 | Warren American Oil Company LLC | Tulsa, OK 74147 | Oil & Gas Operator | Dec 2024 |
| 868 | Washita Oil And Gas, L.L.C. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 869 | Washita Production Company | Tulsa, OK 74136 | Oil & Gas Operator | May 2006 |
| 870 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Dec 2024 |
| 871 | Wehlu Producers Inc | Edmond, OK 73083-5278 | Oil & Gas Operator | Sep 2002 |
| 872 | Wellco Energy Inc | Harrah, OK 73045 | Oil & Gas Operator | Sep 2024 |
| 873 | Wes-Tex Drilling Company | Abilene, TX 79604 | Oil & Gas Operator | Jan 2000 |
| 874 | Western Oil And Gas Development Corp | Oklahoma City, OK 73103-3735 | Oil & Gas Operator | Oct 2024 |
| 875 | Western Petroleum Company Inc | Tulsa, OK 74170-2676 | Oil & Gas Operator | Apr 2020 |
| 876 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Oct 2024 |
| 877 | Wheeler Energy Co. | Tulsa, OK 74101 | Oil & Gas Operator | Oct 2024 |
| 878 | Wheeler Energy, LLC | Tulsa, OK 74101 | Oil & Gas Operator | Dec 2024 |
| 879 | White Goat Resources LLC | Yukon, OK 73099 | Oil & Gas Operator | Oct 2024 |
| 880 | White Mike Oil Field Service | Edmond, OK 73034 | Oil & Gas Operator | Jan 2013 |
| 881 | White Operating Company | Oklahoma City, OK 73159-7136 | Oil & Gas Operator | Oct 2024 |
| 882 | White Star Petroleum LLC | Oklahoma City, OK 73116-7906 | Oil & Gas Operator | Sep 2024 |
| 883 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 884 | Whitley Oil & Gas Inc | Owasso, OK 74055 | Oil & Gas Operator | Jun 2009 |
| 885 | Whitmar Exploration Company | Denver, CO 80202 | Oil & Gas Operator | Sep 2024 |
| 886 | Whitmar Operating Company | Tulsa, OK 74103-3515 | Oil & Gas Operator | Apr 2009 |
| 887 | Wildhorse Oil & Gas Corporation | Ardmore, OK 73402 | Oil & Gas Operator | May 2019 |
| 888 | Williams Reid Oil Co | Dallas, TX 75234 | Oil & Gas Operator | Sep 2024 |
| 889 | Wilshire Enterprises Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 890 | Wilshire Oil LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Sep 2024 |
| 891 | Windsor Energy Group LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2021 |
| 892 | Wishbone Oil & Gas | Noble, OK 73068 | Oil & Gas Operator | Mar 2007 |
| 893 | WLW Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Oct 2024 |
| 894 | Wolverine Exploration Company | Houston, TX 77002 | Oil & Gas Operator | May 2019 |
| 895 | Woods Petroleum Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 896 | WR Oil & Gas LLC | Plano, TX 75024-3523 | Oil & Gas Operator | Sep 2024 |
| 897 | Wynn-Crosby Operating LP | Dallas, TX 75201 | Oil & Gas Operator | Sep 2024 |
| 898 | Xanadu Exploration Company | Broken Arrow, OK 74014 | Oil & Gas Operator | Oct 2024 |
| 899 | Y D F Inc | Oklahoma City, OK 73128 | Oil & Gas Operator | Oct 2024 |
| 900 | Yarhola Production Company | Drumright, OK 74030 | Oil & Gas Operator | Oct 2024 |