| 11801 | True Oil Company LLC | Midland, TX 79701 | Oil & Gas Operator | Mar 2016 |
| 11802 | True Wolf Operating, LLC | Iowa Park, TX 76367 | Oil Operator | Feb 2026 |
| 11803 | Trueblood Resources, Inc. | Denver, CO 80222 | Oil & Gas Operator | Feb 2026 |
| 11804 | Trump Energy | Austin, TX 78734 | Oil & Gas Operator | Mar 2008 |
| 11805 | Trumter Petroleum Corporation | Fort Worth, TX 76185 | Oil & Gas Operator | Aug 1998 |
| 11806 | Trust Oil Co. | Pine, CO 80470 | Oil & Gas Operator | Feb 2026 |
| 11807 | Trustar Operating Company Inc. | Austin, TX 78750 | Oil Operator | Feb 2026 |
| 11808 | Trutex Operating, LLC | Haltom City, TX 76117 | Oil & Gas Operator | Feb 2026 |
| 11809 | Tryall, Inc | Porter, TX 77365 | Oil & Gas Operator | Feb 2026 |
| 11810 | Tryco Exploration, LLC | Plano, TX 75026 | Oil & Gas Operator | Nov 2006 |
| 11811 | Tryma Operating | Borger, TX 79008 | Oil & Gas Operator | Feb 2026 |
| 11812 | TS & T Drilling, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2016 |
| 11813 | TS Oil, LLC | Fort Worth, TX 76114 | Oil & Gas Operator | Feb 2026 |
| 11814 | Tsar Energy, LLC | Dallas, TX 75205 | Oil & Gas Operator | Feb 2026 |
| 11815 | Tsar Operating Company | Fort Worth, TX 76116 | Oil & Gas Operator | Jul 2021 |
| 11816 | Tschoepe, Arthur J. | Leakey, TX 78873 | Oil & Gas Operator | Jun 2001 |
| 11817 | TSF Operating | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 11818 | Tsoco | Tuleta, TX 78162 | Oil & Gas Operator | Apr 2017 |
| 11819 | Tsoco & W. M. Null | Pettus, TX 78146 | Oil & Gas Operator | Aug 2002 |
| 11820 | TSW Oil & Gas, LLC | Abilene, TX 79602 | Oil & Gas Operator | Jan 2016 |
| 11821 | TT Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 11822 | TTK Energy LLC | Kilgore, TX 75663 | Oil Operator | Feb 2026 |
| 11823 | TTL Energy Resources, Inc. | Borger, TX 79008 | Oil & Gas Operator | Aug 2013 |
| 11824 | Tuckco Petroleum Corporation | Andrews, TX 79714 | Oil & Gas Operator | Feb 2026 |
| 11825 | Tucker Drilling Company, Inc. | San Angelo, TX 76903 | Oil & Gas Operator | Jul 1996 |
| 11826 | Tucker Operating Co., Inc. | Victoria, TX 77903 | Oil & Gas Operator | Feb 2026 |
| 11827 | Tucker Petroleum, Inc. | Corpus Chrsti, TX 78468 | Oil & Gas Operator | Feb 2026 |
| 11828 | Tucker Resources, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2003 |
| 11829 | Tug Hill Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2021 |
| 11830 | Tug Oil & Gas, L.L.C. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2026 |
| 11831 | Tularosa Operating Company | Kerrville, TX 78029 | Oil & Gas Operator | Mar 2024 |
| 11832 | Tuleta Energy Partners, LLC | Norman, OK 73072 | Oil & Gas Operator | Feb 2026 |
| 11833 | Tulsa Minerals Inc | Tulsa, OK 74136-1045 | Oil & Gas Operator | May 2013 |
| 11834 | Tumble Weed Production Co. | Borger, TX 79008 | Oil & Gas Operator | Dec 1994 |
| 11835 | Tumbleweed Energy Limited | Midland, TX 79704 | Oil & Gas Operator | Dec 2022 |
| 11836 | Tundra Operating LLC | Spring, TX 77386 | Oil Operator | May 2017 |
| 11837 | Turnbow Drilling Co. | Holliday, TX 76366 | Oil & Gas Operator | Jul 2025 |
| 11838 | Turner Production | Big Lake, TX 76932 | Oil & Gas Operator | Feb 2026 |
| 11839 | Turner, D. Ann Garrett, Est. Of | Big Spring, TX 79721 | Oil & Gas Operator | Jan 1999 |
| 11840 | Turner, Greg | Cross Plains, TX 76443 | Oil & Gas Operator | Feb 2026 |
| 11841 | Turner, M. O. | San Antonio, TX 78278 | Oil & Gas Operator | Apr 2003 |
| 11842 | Turner, Randy | Olney, TX 76374 | Oil & Gas Operator | Jan 2005 |
| 11843 | Turning Point Oil, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Jan 2021 |
| 11844 | Turquoise Bay Corporation | Odessa, TX 79760 | Oil & Gas Operator | Dec 2018 |
| 11845 | Turrentine Oil & Gas, Inc. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Oct 2019 |
| 11846 | Turrentine Oil And Gas | Levelland, TX 79336 | Oil & Gas Operator | Feb 1996 |
| 11847 | Tuskar (Texas), Inc. | Nichols Hill, OK 73116 | Oil & Gas Operator | Jan 2016 |
| 11848 | Tuthill & Barbee | Amarillo, TX 79101 | Oil & Gas Operator | Nov 1994 |
| 11849 | Twilco Operating LLC | Holliday, TX 76366 | Oil Operator | Feb 2026 |
| 11850 | Twilight Energy LLC | Fort Worth, TX 76185 | Oil & Gas Operator | Feb 2026 |
| 11851 | Twin Eagle Petroleum Corp | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2002 |
| 11852 | Twin Oaks Construction Company | Irving, TX 75063 | Oil & Gas Operator | Feb 2026 |
| 11853 | Twins Oil Co. | Monahans, TX 79756 | Oil & Gas Operator | Feb 2026 |
| 11854 | Two Bit Operating Company LLC | Fort Worth, TX 76110 | Oil & Gas Operator | Feb 2026 |
| 11855 | Two Black Bears Oil, Inc. | Midland, TX 79710 | Oil & Gas Operator | Sep 2003 |
| 11856 | Two Oaks Operating Company, LLC. | Flower Mound, TX 75028 | Oil & Gas Operator | Mar 2008 |
| 11857 | Two P Partners, LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 11858 | Twojo, Inc. | Longview, TX 75601 | Oil & Gas Operator | Nov 1996 |
| 11859 | TX Enhanced Oil Recovery Co, LLC | Sealy, TX 77474 | Oil & Gas Operator | Feb 2026 |
| 11860 | TX Heat Of The Permian Basin Inc | Odessa, TX 79768 | Oil & Gas Operator | Dec 2021 |
| 11861 | TX Lone Star Operating Co, LLC | Sulphur SPGS, TX 75483 | Oil & Gas Operator | Feb 2026 |
| 11862 | TX Petroleum Company | Corpus Chrsti, TX 78412 | Oil & Gas Operator | Apr 1996 |
| 11863 | Txco Resources Inc. | San Antonio, TX 78280 | Oil & Gas Operator | Feb 2026 |
| 11864 | Txla Energy, Inc. | Houston, TX 77018 | Oil & Gas Operator | Feb 2026 |
| 11865 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 11866 | Txok Texas Energy Resources,L.P. | Dallas, TX 75251 | Oil & Gas Operator | Apr 2008 |
| 11867 | Txon Partners, LLC | Houston, TX 77057 | Oil & Gas Operator | Jun 2017 |
| 11868 | TXP, Incorporated | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2026 |
| 11869 | Txu Fuel Company | Dallas, TX 75201 | Oil & Gas Operator | May 2004 |
| 11870 | Txu Gas Company | Dallas, TX 75201 | Oil & Gas Operator | Sep 2004 |
| 11871 | Txu Lone Star Pipeline | Dallas, TX 75201 | Oil & Gas Operator | Oct 2003 |
| 11872 | TXX Operating LLC | Shreveport, LA 71133 | Oil & Gas Operator | Feb 2026 |
| 11873 | Ty-Tex Exploration, Inc. | Tyler, TX 75711 | Oil Operator | Dec 2000 |
| 11874 | Tyco Operating Co. | Archer City, TX 76351 | Oil & Gas Operator | Feb 2026 |
| 11875 | Tyl Oil | Canon City, CO 81212 | Gas Operator | May 1994 |
| 11876 | Tyler Oil & Gas Inc. | Tyler, TX 75702 | Oil & Gas Operator | Sep 2004 |
| 11877 | Tyner Texas Operating Company | Dallas, TX 75248 | Oil & Gas Operator | Feb 2026 |
| 11878 | U S Energy Corp. Of Amer. Inc. | Cisco, TX 76437 | Oil & Gas Operator | Feb 2026 |
| 11879 | U. D. Man, Inc. | San Antonio, TX 78212 | Oil & Gas Operator | Feb 2026 |
| 11880 | U. S. Energy Development Corporation | Fort Worth, TX 76164 | Oil & Gas Operator | Feb 2026 |
| 11881 | U. S. Operating, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Jul 2025 |
| 11882 | U.S. Enercorp, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Jul 2004 |
| 11883 | U.S. Enercorp, LTD. | San Antonio, TX 78209 | Oil & Gas Operator | Sep 2019 |
| 11884 | U.S. Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 11885 | U.S. Sovereign Oil And Gas, Inc. | Dallas, TX 75355 | Oil & Gas Operator | Feb 2026 |
| 11886 | U.S.A. Plugging Company | Pearsall, TX 78061 | Oil & Gas Operator | Feb 2026 |
| 11887 | U1 Ranch Oil | Houston, TX 77269 | Oil & Gas Operator | Feb 2026 |
| 11888 | Ubetco, Inc. | Rockdale, TX 76567 | Oil & Gas Operator | Feb 2026 |
| 11889 | Uhc Petroleum Corporation | Rocksprings, TX 78880 | Oil & Gas Operator | Feb 2026 |
| 11890 | Ulatex Oil & Gas Inc. | Nocona, TX 76255 | Oil & Gas Operator | Dec 1998 |
| 11891 | Ultra Oil & Gas, Inc. | Centerton, AR 72719 | Oil & Gas Operator | Feb 2026 |
| 11892 | Ultra Petroleum (U.S.A.), Inc. | Granbury, TX 76048 | Oil & Gas Operator | Sep 2003 |
| 11893 | Ultra Resources Inc | Houston, TX 77060 | Oil & Gas Operator | Sep 2018 |
| 11894 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 11895 | Umma Resources, LLC | Portland, TX 78374 | Gas Operator | Feb 2026 |
| 11896 | Unbridled Resources, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2026 |
| 11897 | Underwood, D. W. | Eldorado, TX 76936 | Oil & Gas Operator | Nov 1997 |
| 11898 | Underwood, Jim | Graham, TX 76450 | Oil & Gas Operator | Mar 2018 |
| 11899 | Unicorn Energy, Inc. | Elgin, TX 78621 | Oil & Gas Operator | Feb 2026 |
| 11900 | Unified Oil & Gas Corp. | Snyder, TX 79550 | Oil Operator | Feb 2026 |