| 801 | Texas Energies, Inc. | Pratt, KS 67124 | Oil & Gas Operator | Aug 1998 |
| 802 | Texas Oil & Gas Corporation | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 803 | Texinia Corp | Dallas, TX 75201 | Oil & Gas Operator | Jun 2015 |
| 804 | Texla Energy Products LLC | Houston, TX 77002 | Oil Operator | Sep 2020 |
| 805 | Texocan Minerals Inc | Tulsa, OK 74147 | Oil & Gas Operator | Dec 2000 |
| 806 | The Quintin Little Company Inc | Ardmore, OK 73401 | Oil & Gas Operator | Oct 2024 |
| 807 | Thomas J L Engineering Inc | Edmond, OK 73003-0026 | Oil & Gas Operator | Jul 2016 |
| 808 | Thomas Production Co Inc | | Oil & Gas Operator | Mar 2015 |
| 809 | Thompson Operating Co. | Abernathy, TX 79311 | Oil & Gas Operator | Aug 1994 |
| 810 | Thompson Roy G | Bartlesville, OK 74006 | Oil & Gas Operator | Feb 1993 |
| 811 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 812 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 813 | Titan Resources LTD | Limaville, OH 44640 | Oil & Gas Operator | Oct 2024 |
| 814 | TK Drilling Corp. | Tulsa, OK 74133 | Oil & Gas Operator | Sep 2024 |
| 815 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2024 |
| 816 | Tomlinson Oil Co. Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Jun 2023 |
| 817 | Torch Energy MKT Inc | Houston, TX 77010 | Oil & Gas Operator | Aug 1996 |
| 818 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 819 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 820 | Trailhead Exploration, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2024 |
| 821 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 822 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Dec 2024 |
| 823 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Oct 2024 |
| 824 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 825 | Triton Oil & Gas Corp. | Houston, TX 77002 | Oil & Gas Operator | Nov 2014 |
| 826 | Triumph Resources Inc | Oklahoma City, OK 73114 | Oil & Gas Operator | Nov 2004 |
| 827 | Trueblood Resources, Inc. | Denver, CO 80222 | Oil & Gas Operator | Dec 2024 |
| 828 | Tulsa Energy Partners LLC | Tulsa, OK 74103-4461 | Oil & Gas Operator | Sep 2024 |
| 829 | Tulum Corporation | Oklahoma City, OK 73101-0125 | Oil & Gas Operator | Sep 2024 |
| 830 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 831 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |
| 832 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 833 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 834 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Dec 2024 |
| 835 | United Energy Operating, LLC | Edmond, OK 73083 | Oil & Gas Operator | Dec 2024 |
| 836 | United Oil Corporation | Denver, CO 80202-3813 | Oil & Gas Operator | Sep 2024 |
| 837 | Uplands Resources Inc | Tulsa, OK 74103-4141 | Oil & Gas Operator | Sep 2024 |
| 838 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Dec 2024 |
| 839 | Valar Petroleum Inc | Houston, TX 77069 | Oil & Gas Operator | May 2006 |
| 840 | Valence Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Dec 2024 |
| 841 | Valero Marketing & Supply Co | San Antonio, TX 78269-6000 | Oil & Gas Operator | Sep 2023 |
| 842 | Vantage Point Operating Co | Houston, TX 77057 | Oil & Gas Operator | Dec 2014 |
| 843 | Vastar Resources Inc | Houston, TX 77253 | Oil & Gas Operator | Aug 2024 |
| 844 | Veenker Resources, Inc. | Oklahoma City, OK 73113 | Oil & Gas Operator | Oct 2024 |
| 845 | Vintage Gas Inc | Tulsa, OK 74119-1029 | Oil & Gas Operator | Jun 2007 |
| 846 | Vintage Marketing Inc | Tulsa, OK 74172 | Oil & Gas Operator | Apr 2003 |
| 847 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Sep 2024 |
| 848 | Vintage Pipeline Inc | Tulsa, OK 74119-1029 | Oil & Gas Operator | Sep 2004 |
| 849 | VRC Oil & Gas Operating Co | Oklahoma City, OK 73116-1431 | Oil & Gas Operator | Jun 2019 |
| 850 | VVWF Oil Inc | Oklahoma City, OK 73143-7375 | Gas Operator | Feb 1994 |
| 851 | W S Crude Oil Purchasing Inc | Oklahoma City, OK 73129-7613 | Oil & Gas Operator | May 2008 |
| 852 | Waggoner Drilling Company | Bristow, OK 74010-0663 | Oil & Gas Operator | Jan 2014 |
| 853 | Waggoner Oil & Gas Corp | Enid, OK 73703-1152 | Oil & Gas Operator | Oct 2024 |
| 854 | Walker Keith F | Ardmore, OK 73401 | Oil & Gas Operator | Jan 2019 |
| 855 | Wallace Oil & Gas Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Dec 2024 |
| 856 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Dec 2024 |
| 857 | Ward Gas Marketing Inc | Enid, OK 73702 | Oil & Gas Operator | Sep 2011 |
| 858 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Sep 2024 |
| 859 | Washita Oil And Gas, L.L.C. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 860 | Washita Production Company | Tulsa, OK 74136 | Oil & Gas Operator | May 2006 |
| 861 | Waterford Energy Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Nov 1998 |
| 862 | Weinkauf Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2024 |
| 863 | Weiser-Brown Operating Company | Magnolia, AR 71754 | Oil & Gas Operator | Dec 2024 |
| 864 | Wessely Energy Company | Dallas, TX 75206 | Oil & Gas Operator | May 2001 |
| 865 | Western Mountain Resources LLC | Cogan Station, PA 17728 | Oil & Gas Operator | Sep 2024 |
| 866 | Western Oil And Gas Development Corp | Oklahoma City, OK 73103-3735 | Oil & Gas Operator | Oct 2024 |
| 867 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Oct 2024 |
| 868 | Whitaker Energy Inc | Humble, TX 77346-1798 | Oil & Gas Operator | Jul 2024 |
| 869 | White Goat Resources LLC | Yukon, OK 73099 | Oil & Gas Operator | Oct 2024 |
| 870 | White Oak Production Company | Conway, AR 72034 | Oil & Gas Operator | Sep 2005 |
| 871 | White River Energy LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Nov 2010 |
| 872 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 873 | Whitmar Exploration Company | Denver, CO 80202 | Oil & Gas Operator | Sep 2024 |
| 874 | Whitmar Operating Company | Tulsa, OK 74103-3515 | Oil & Gas Operator | Apr 2009 |
| 875 | Wildhorse Oil & Gas Corporation | Ardmore, OK 73402 | Oil & Gas Operator | May 2019 |
| 876 | Wildhorse Operating Company | Ardmore, OK 73402 | Oil & Gas Operator | Dec 2024 |
| 877 | Will Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Sep 2024 |
| 878 | Williford Energy Company | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2024 |
| 879 | Williford Resources LLC | Tulsa, OK 74136-1020 | Oil & Gas Operator | Sep 2024 |
| 880 | Wimberley James A | Dallas, TX 75229-6180 | Oil & Gas Operator | Nov 2014 |
| 881 | Witty Thomas E | Enid, OK 73703 | Oil & Gas Operator | Mar 2008 |
| 882 | WLW Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Oct 2024 |
| 883 | Woods Petroleum Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 884 | Worldwide Energy Corp. | Freer, TX 78357 | Oil & Gas Operator | Jan 1997 |
| 885 | WR Oil & Gas LLC | Plano, TX 75024-3523 | Oil & Gas Operator | Sep 2024 |
| 886 | Wynn-Crosby Operating LP | Dallas, TX 75201 | Oil & Gas Operator | Sep 2024 |
| 887 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 888 | Xog Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2024 |
| 889 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Dec 2024 |
| 890 | Yarhola Production Company | Drumright, OK 74030 | Oil & Gas Operator | Oct 2024 |
| 891 | Young H Inc | Edmond, OK 73013 | Oil & Gas Operator | Oct 1993 |
| 892 | Zarvona Energy LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 893 | Zeal Production Company | Sperry, OK 74073-4714 | Oil & Gas Operator | Sep 2024 |
| 894 | Zeiders Bros Oil & Gas Co LLC | Edmond, OK 73003 | Oil & Gas Operator | Sep 2024 |
| 895 | Zenergy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2024 |
| 896 | Zielke Contracting LLC | Balko, OK 73931-1187 | Oil Operator | Jun 2020 |
| 897 | Zinke & Trumbo LTD | Tulsa, OK 74105 | Oil & Gas Operator | Sep 2017 |