| 801 | T M Hopkins Operating Co | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2002 |
| 802 | T2 Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 2025 |
| 803 | Tahoe Energy, Inc. | Midland, TX 79703 | Oil & Gas Operator | Jul 1996 |
| 804 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 805 | Tandem Energy Corporation | Houston, TX 77056 | Oil & Gas Operator | Jul 2025 |
| 806 | Tap Rock Operating, LLC | Denver, CO 80203 | Oil & Gas Operator | Jul 2025 |
| 807 | Team Operating, L.L.C. | Pinehurst, TX 77362 | Oil & Gas Operator | Jul 2025 |
| 808 | Techsys Resources LLC | Houston, TX 77224 | Gas Operator | Aug 2015 |
| 809 | Tema Oil And Gas Company | Houston, TX 77084 | Oil & Gas Operator | Jul 2025 |
| 810 | Tempo Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 811 | Tenison Oil Company | Abilene, TX 79605 | Oil & Gas Operator | Jul 2025 |
| 812 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | May 2025 |
| 813 | Texas Reexploration Operating LC | Fredericksbrg, TX 78624 | Oil & Gas Operator | Jul 2025 |
| 814 | Texas Vanguard Oil Company | Austin, TX 78720 | Oil & Gas Operator | Jan 2014 |
| 815 | Texland Petroleum, L.P. | Fort Worth, TX 76107 | Oil & Gas Operator | Jul 2025 |
| 816 | Texland Petroleum-Hobbs, L.L.C. | Fort Worth, TX 76102 | Oil & Gas Operator | May 2025 |
| 817 | Texon Oil Company, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2023 |
| 818 | The Colborn Company, Inc. | Eunice, NM 88231 | Oil & Gas Operator | Jun 2025 |
| 819 | Thomas R Sivley | Southlake, TX 76092 | Oil & Gas Operator | Mar 2013 |
| 820 | Three Forks Resources LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Jul 2025 |
| 821 | Three Rivers Operating Co LLC | Austin, TX 78735 | Oil & Gas Operator | Mar 2017 |
| 822 | Three Span Oil & Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 823 | Threshold Development Company | Fort Worth, TX 76109 | Oil & Gas Operator | Aug 2016 |
| 824 | Thunderbolt Petroleum, LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2013 |
| 825 | Timberline Oil & Gas, LLC | Seminole, TX 79360 | Oil Operator | Mar 2025 |
| 826 | Tipperary Oil & Gas Corp | Denver, CO 80202 | Oil & Gas Operator | May 2014 |
| 827 | Tipperary Petro Co | Midland, TX 79701 | Oil & Gas Operator | Dec 1993 |
| 828 | Tipton & Denton | Dallas, TX 752196406 | Oil & Gas Operator | Sep 2019 |
| 829 | Tipton Denton & Denton | Hobbs, NM 88240 | Oil & Gas Operator | Sep 2019 |
| 830 | Tipton Oil & Gas Acquisitions, Inc. | Irving, TX 75038 | Oil & Gas Operator | Sep 2010 |
| 831 | Titan Resources I, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2000 |
| 832 | Titus Oil & Gas Production, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2022 |
| 833 | TK Operating | Cross Plains, TX 76443 | Oil & Gas Operator | Jul 2025 |
| 834 | TMBR/Sharp Drilling, Inc. | Midland, TX 79703 | Oil & Gas Operator | Feb 2004 |
| 835 | Tola Production Company | Dallas, TX 75367 | Oil & Gas Operator | Jul 2025 |
| 836 | Tom Brown Inc | Denver, CO 80202 | Oil & Gas Operator | Dec 2004 |
| 837 | Tom R Cone | Hobbs, NM 88240 | Oil Operator | Oct 2009 |
| 838 | Tora Oil & Gas | Hobbs, NM 88240 | Oil & Gas Operator | Jan 2008 |
| 839 | Tora Oil & Gas, LLC | Jal, NM 88252 | Oil & Gas Operator | Dec 2020 |
| 840 | Torch Energy Services, Inc. | Houston, TX 77010 | Oil & Gas Operator | Sep 2011 |
| 841 | Transglobe Oil & Gas Corporation | Littleton, CO 801222710 | Oil & Gas Operator | Dec 1999 |
| 842 | Trilogy Operating, Inc. | Midland, TX 79708 | Oil & Gas Operator | Jul 2025 |
| 843 | Trinity Eor, LLC | Midland, TX 79701 | Oil & Gas Operator | Jan 2019 |
| 844 | Trio Oil Co | Hobbs, NM 88240 | Oil & Gas Operator | Feb 2004 |
| 845 | Tritex Resources, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2009 |
| 846 | Triumph Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 847 | Turrentine Oil & Gas, Inc. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Oct 2019 |
| 848 | U. S. Energy Development Corporation | Fort Worth, TX 76164 | Oil & Gas Operator | Jul 2025 |
| 849 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 850 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Jul 2025 |
| 851 | United Operating, LLC *** | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 852 | Unitex Oil & Gas, L.L.C. | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 853 | Upland Production Company | Edmond, OK 73083 | Oil & Gas Operator | Jul 2025 |
| 854 | V-F Petroleum Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 855 | Vanguard Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Feb 2021 |
| 856 | Vernon E. Faulconer, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Dec 2024 |
| 857 | Victory Oil & Gas Inc | Gun Barrel Cy, TX 75156 | Oil & Gas Operator | Jul 2025 |
| 858 | Vintage Petroleum, LLC | Houston, TX 77210 | Oil & Gas Operator | Dec 2019 |
| 859 | Vista Resources Of Texas, Inc. | Midland, TX 79701 | Oil & Gas Operator | Feb 2000 |
| 860 | VPR Operating LLC | Austin, TX 78746 | Oil & Gas Operator | Oct 2013 |
| 861 | W & W Oil, Inc. | Lovington, NM 88260 | Oil & Gas Operator | May 1999 |
| 862 | W B Yarborough | Hobbs, NM 88241 | Oil & Gas Operator | Nov 1995 |
| 863 | W H Brininstool | Jal, NM 88252 | Oil & Gas Operator | Aug 2006 |
| 864 | W R Ericksen | Hobbs, NM 882411109 | Oil & Gas Operator | Jul 1994 |
| 865 | W. A. Moncrief, Jr. | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2025 |
| 866 | Wadi Petroleum Inc | Houston, TX 77014 | Oil & Gas Operator | May 2018 |
| 867 | Wagner & Brown, LTD. | Midland, TX 79702 | Oil & Gas Operator | Aug 2014 |
| 868 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2025 |
| 869 | Wallen Production Co. | Midland, TX 79702 | Oil & Gas Operator | Aug 1996 |
| 870 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Jul 2025 |
| 871 | Walton Properties LTD. | Midland, TX 79702 | Oil & Gas Operator | Feb 2004 |
| 872 | Warren American Oil Co | Tulsa, OK 74147 | Oil & Gas Operator | May 2025 |
| 873 | Warren E & P Inc | Dallas, TX 75240 | Oil & Gas Operator | Apr 2025 |
| 874 | Warrior Inc | Hobbs, NM 88241 | Oil & Gas Operator | Feb 1998 |
| 875 | Waylander LLC | Plano, TX 75025 | Oil & Gas Operator | Jul 2025 |
| 876 | Westbrook Oil Corp | Jal, NM 88252 | Oil & Gas Operator | May 2018 |
| 877 | Westerly Exploration, Inc. | Houston, TX 77256 | Oil & Gas Operator | Jul 2025 |
| 878 | Western Oil Producers Inc | Roswell, NM 88202 | Oil & Gas Operator | Jul 2005 |
| 879 | Western Reserves Oil Co Inc | Midland, TX 79705 | Oil & Gas Operator | Oct 2020 |
| 880 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 881 | Weststar Exploration Co | Houston, TX 77027 | Oil & Gas Operator | Jun 2022 |
| 882 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Jul 2025 |
| 883 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 884 | Wildcat Energy, LLC | Odessa, TX 79768 | Oil & Gas Operator | Jul 2021 |
| 885 | Will McCasland Ind | Hobbs, NM 88240 | Gas Operator | Feb 2008 |
| 886 | William C Bahlburg | Dallas, TX 75240 | Oil & Gas Operator | Dec 1994 |
| 887 | Willow Creek Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2009 |
| 888 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 889 | Wishbone Texas Operating Co LLC | Houston, TX 77064 | Oil & Gas Operator | Jul 2019 |
| 890 | WJC, Inc. | Post, TX 79356 | Oil & Gas Operator | Jul 2025 |
| 891 | Wood, McShane & Thams | Midland, TX 79702 | Oil & Gas Operator | Oct 1995 |
| 892 | Woodbine Petroleum, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Aug 2003 |
| 893 | WPX Energy Permian, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2025 |
| 894 | Wti 1993 LTD | FT. Collins, CO 80526 | Oil & Gas Operator | Apr 1995 |
| 895 | Wyatt Permian, LLC | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Jul 2025 |
| 896 | Wynn-Crosby Operating LP | Dallas, TX 75201 | Oil & Gas Operator | Apr 2025 |
| 897 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 898 | Xog Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 899 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Jul 2025 |
| 900 | XTO Permian Operating LLC. | Midland, TX 79707 | Oil & Gas Operator | May 2025 |