| 801 | Sun Refining & Marketing | Philadelphia, PA 19103 | Oil & Gas Operator | Jul 2015 |
| 802 | Sunoco Partners MKT & Terminal | Tulsa, OK 74102-2039 | Oil & Gas Operator | Jan 2019 |
| 803 | Sunrise Energy Co | Dallas, TX 75206 | Oil & Gas Operator | Aug 1993 |
| 804 | Sunterra Energy Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2009 |
| 805 | Superior Saltwater Disposal LLC | | Oil & Gas Operator | Dec 2016 |
| 806 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | Jan 2024 |
| 807 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |
| 808 | T & S Mud Disposal LLC | Lindsay, OK 73052-0754 | Oil Operator | Mar 2013 |
| 809 | T E L Oil & Gas Corporation | Guymon, OK 73942-0714 | Gas Operator | Jan 2024 |
| 810 | T S B T Oil & Gas Properties | Moore, OK 73160-8126 | Oil & Gas Operator | Jan 2018 |
| 811 | Tack Operating LLC | Oklahoma City, OK 73172-1492 | Oil & Gas Operator | Aug 2021 |
| 812 | Tamworth Resources LLC | | Oil & Gas Operator | Jan 2024 |
| 813 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2024 |
| 814 | Tat, Inc. | Oklahoma City, OK 73127 | Oil & Gas Operator | Feb 2023 |
| 815 | Taylor John A | | Oil & Gas Operator | Jan 2016 |
| 816 | TD Operating Inc | El Reno, OK 73036-1035 | Oil & Gas Operator | Feb 2024 |
| 817 | Te-Ray Energy, Inc. | Oklahoma City, OK 73108 | Oil & Gas Operator | Jan 2024 |
| 818 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2024 |
| 819 | Tekenergy, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 820 | Temex Energy, Inc. | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2002 |
| 821 | Tenaska Marketing Ventures | Omaha, NE 68154 | Oil & Gas Operator | Mar 2021 |
| 822 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Nov 2023 |
| 823 | Teocalli Exploration LLC | | Oil & Gas Operator | Feb 2024 |
| 824 | Terra Production Company | Okemah, OK 74859-5924 | Oil & Gas Operator | Apr 2020 |
| 825 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Dec 2023 |
| 826 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 827 | Texas Meridian Operating Co. Inc | Houston, TX 77079 | Oil & Gas Operator | Oct 1993 |
| 828 | Texas Southwest Gas LLC | Tulsa, OK 74121 | Oil & Gas Operator | Oct 2022 |
| 829 | TGX Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2004 |
| 830 | The Calvert Company | Oklahoma City, OK 73154-1589 | Oil & Gas Operator | Dec 2021 |
| 831 | The Quintin Little Company Inc | Ardmore, OK 73402-1509 | Oil & Gas Operator | Feb 2024 |
| 832 | Three Sands Oil Inc | Perry, OK 73077-0853 | Oil & Gas Operator | May 2023 |
| 833 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 834 | Tidemark Exploration Inc | Tulsa, OK 74120 | Oil & Gas Operator | Apr 2019 |
| 835 | Tiger Trucks Inc | Seminole, OK 74868 | Oil & Gas Operator | Feb 2024 |
| 836 | Tilley Oil & Gas, Inc. | Oklahoma City, OK 73172 | Oil & Gas Operator | Apr 2024 |
| 837 | TLS Oil & Gas Inc | Kingfisher, OK 73750-0901 | Oil & Gas Operator | Jan 2024 |
| 838 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2024 |
| 839 | Toland & Johnston Inc | Edmond, OK 73083-0189 | Oil & Gas Operator | Feb 2024 |
| 840 | Tonys Crude Oil Reclaiming Plant Inc | | Oil Operator | Jan 2024 |
| 841 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 842 | Total Petroleum Inc | Denver, CO 80201-0500 | Oil & Gas Operator | Nov 2006 |
| 843 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 844 | Tpet, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Mar 2008 |
| 845 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Feb 2024 |
| 846 | Transfuel Resources Co | Houston, TX 77215 | Oil & Gas Operator | Aug 2013 |
| 847 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 848 | Travis Peak Resources LLC | Austin, TX 78759-7279 | Oil & Gas Operator | Jan 2024 |
| 849 | Traynor Oil & Gas Inc | Claremont, CA 91711-2837 | Oil & Gas Operator | Jan 2024 |
| 850 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Apr 2024 |
| 851 | Trepco Production Company, Inc. | Yukon, OK 73099 | Oil & Gas Operator | Jan 2024 |
| 852 | Trey Resources Inc. | Midland, TX 79710 | Oil & Gas Operator | Jan 2024 |
| 853 | Triad Of Oklahoma Inc | | Oil & Gas Operator | Feb 1996 |
| 854 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |
| 855 | Trineha Inc | Ardmore, OK 73402-2478 | Oil & Gas Operator | Jun 2009 |
| 856 | Triple C Properties Inc | Seminole, OK 74818-0481 | Oil & Gas Operator | Jun 2023 |
| 857 | Tripledee Drilling Co Inc | Ardmore, OK 73402-1888 | Oil & Gas Operator | Dec 2015 |
| 858 | Triplett Larry W | Oklahoma City, OK 73112-5325 | Oil & Gas Operator | Mar 2015 |
| 859 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 860 | Triumph Energy Partners LLC | | Oil & Gas Operator | Jan 2024 |
| 861 | Triumph Resources Inc | Oklahoma City, OK 73114 | Oil & Gas Operator | Nov 2004 |
| 862 | Trout Disposal Well Inc | Hammon, OK 73650-0292 | Oil & Gas Operator | Jul 2016 |
| 863 | Tucson Oil & Gas Inc | | Oil & Gas Operator | Aug 1994 |
| 864 | Tulsa Energy Partners LLC | Tulsa, OK 74103-4461 | Oil & Gas Operator | Feb 2024 |
| 865 | Turner Oil Company | Yale, OK 74085-0234 | Oil & Gas Operator | Nov 2014 |
| 866 | Turner Resources Inc | Hennessey, OK 73742-0775 | Oil & Gas Operator | Jan 2024 |
| 867 | Twenty/Twenty Oil & Gas Inc | Hennessey, OK 73742-0247 | Oil & Gas Operator | Feb 2024 |
| 868 | Twisted Resources Inc | | Oil & Gas Operator | Feb 2024 |
| 869 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 870 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |
| 871 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 872 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 873 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2024 |
| 874 | United Energy Operating, LLC | Edmond, OK 73083 | Oil & Gas Operator | Apr 2024 |
| 875 | United Energy Trading LLC | Tulsa, OK 74133 | Gas Operator | Feb 2015 |
| 876 | United Oil Corporation | Denver, CO 80202-3813 | Oil & Gas Operator | Jan 2024 |
| 877 | United Production Company LLC | Edmond, OK 73083-5348 | Oil & Gas Operator | Feb 2024 |
| 878 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Apr 2024 |
| 879 | Valjohn Energy Corporation | Oklahoma City, OK 73142-6090 | Oil & Gas Operator | Jan 2024 |
| 880 | Vaquero Gas Company,Incorporated | Houston, TX 77002 | Oil & Gas Operator | Dec 1996 |
| 881 | Veenker Resources, Inc. | Oklahoma City, OK 73113 | Oil & Gas Operator | Feb 2024 |
| 882 | Ventana Exploration And Production II LLC | | Oil & Gas Operator | Feb 2024 |
| 883 | Viersen & Cochran Drilling Company | | Oil & Gas Operator | May 2015 |
| 884 | Vintage Gas Inc | Tulsa, OK 74119-1029 | Oil & Gas Operator | Jun 2007 |
| 885 | Vintage Marketing Inc | Tulsa, OK 74172 | Oil & Gas Operator | Apr 2003 |
| 886 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Jan 2024 |
| 887 | Vintage Pipeline Inc | Tulsa, OK 74119-1029 | Oil & Gas Operator | Sep 2004 |
| 888 | Vista Energy Inc | Yukon, OK 73085-0827 | Oil & Gas Operator | Mar 2015 |
| 889 | Vitol Inc | Houston, TX 77098 | Oil & Gas Operator | Sep 2023 |
| 890 | VRC Oil & Gas Operating Co | Oklahoma City, OK 73116-1431 | Oil & Gas Operator | Jun 2019 |
| 891 | W C T Operating LLC | Oklahoma City, OK 73101-0678 | Oil & Gas Operator | Oct 2023 |
| 892 | W S Crude Oil Purchasing Inc | Oklahoma City, OK 73129-7613 | Oil & Gas Operator | May 2008 |
| 893 | Walker Corporation (The) | Oklahoma City, OK 73156 | Oil & Gas Operator | May 2006 |
| 894 | Wallace Oil & Gas Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Apr 2024 |
| 895 | Walsh Jr F Howard | Fort Worth, TX 76102-4773 | Oil & Gas Operator | Dec 2023 |
| 896 | Ward Gas Marketing Inc | Enid, OK 73702 | Oil & Gas Operator | Sep 2011 |
| 897 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Jan 2024 |
| 898 | Warren American Oil Company LLC | Tulsa, OK 74147 | Oil & Gas Operator | Apr 2024 |
| 899 | Washita Oil And Gas, L.L.C. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 900 | Washita Production Company | Tulsa, OK 74136 | Oil & Gas Operator | May 2006 |