| 801 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Dec 2025 |
| 802 | Spring Operating Company | Edmond, OK 73034 | Oil & Gas Operator | Dec 2025 |
| 803 | Spring Valley Oil & Gas Inc | Drummond, OK 73735 | Oil & Gas Operator | Dec 2025 |
| 804 | St Johns Operating #1 LP | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 805 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 806 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2025 |
| 807 | Staghorn Petroleum II LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Dec 2025 |
| 808 | Staghorn Petroleum LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Nov 2025 |
| 809 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 810 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2026 |
| 811 | Stephens Exploration, Inc. | Dallas, TX 75367 | Oil & Gas Operator | Dec 2025 |
| 812 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Dec 2025 |
| 813 | Stone Creek Operating, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Feb 2026 |
| 814 | Stone River Energy Corp | Edmond, OK 73034 | Oil & Gas Operator | Jan 2014 |
| 815 | Stoneriver Energy, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Feb 2026 |
| 816 | Stride Energy LLC | Piedmont, OK 73078 | Oil & Gas Operator | Dec 2025 |
| 817 | Stumpff Paul | Bartlesville, OK 74006-3426 | Oil & Gas Operator | Mar 2015 |
| 818 | Sundance Operating Co | | Oil & Gas Operator | Jul 2016 |
| 819 | Sunterra Energy Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2009 |
| 820 | Superior Production MGMT Inc | Calumet, OK 73014 | Oil & Gas Operator | Mar 2015 |
| 821 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | Nov 2025 |
| 822 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |
| 823 | T2 Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Feb 2026 |
| 824 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Dec 2025 |
| 825 | Tarrant Tracy Dba Trace Oil | Crescent, OK 73028 | Oil & Gas Operator | Feb 2021 |
| 826 | Tbi Exploration Inc | Englewood, CO 801556525 | Oil & Gas Operator | Jun 2011 |
| 827 | TD Operating Inc | Hinton, OK 73047 | Oil & Gas Operator | Dec 2025 |
| 828 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Feb 2026 |
| 829 | Technical Energy Services, Inc. | Norman, OK 73070 | Oil & Gas Operator | Nov 2025 |
| 830 | Teepee Oil & Gas Inc | Yukon, OK 73085 | Oil Operator | Dec 2006 |
| 831 | Tekenergy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 832 | Tema Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Jun 2009 |
| 833 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Nov 2025 |
| 834 | Tennyson Oil & Gas | Muskogee, OK 74401 | Oil Operator | Nov 2025 |
| 835 | Teocalli Exploration LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2025 |
| 836 | Terra Production Company | Okemah, OK 74859-5924 | Oil & Gas Operator | Apr 2020 |
| 837 | Tessera Energy LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Nov 2025 |
| 838 | Tex-Star Production | Dallas, TX 75206 | Oil & Gas Operator | Dec 2025 |
| 839 | Texaco Exploration & Prod Inc | Houston, TX 77236 | Oil & Gas Operator | Dec 2025 |
| 840 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 841 | Texaco Oils Inc | Tulsa, OK 74102-2420 | Oil & Gas Operator | Jan 2003 |
| 842 | Texas American Oil Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2001 |
| 843 | Texas Meridian Operating Co. Inc | Houston, TX 77079 | Oil & Gas Operator | Oct 1993 |
| 844 | Texasgulf Inc. | Newgulf, TX 77462 | Oil & Gas Operator | Jul 1994 |
| 845 | TGX Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2004 |
| 846 | The Quintin Little Company Inc | Ardmore, OK 73401 | Oil & Gas Operator | Dec 2025 |
| 847 | Thomas J L Engineering Inc | Edmond, OK 73003-0026 | Oil & Gas Operator | Jul 2016 |
| 848 | Thompson, Joe L., Inc. | Oklahoma City, OK 73132 | Oil & Gas Operator | Oct 2005 |
| 849 | Three Sands Oil Inc | Perry, OK 73077 | Oil & Gas Operator | May 2023 |
| 850 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 851 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 852 | Tilley Oil & Gas, Inc. | Oklahoma City, OK 73172 | Oil & Gas Operator | Feb 2026 |
| 853 | Tipperary Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2014 |
| 854 | Titan Oil & Gas Corporation | Edmond, OK 73013-5417 | Oil & Gas Operator | Nov 2025 |
| 855 | Titan Resources LTD | Limaville, OH 44640 | Oil & Gas Operator | Dec 2025 |
| 856 | TLS Oil & Gas Inc | Kingfisher, OK 73750-0901 | Oil & Gas Operator | Nov 2025 |
| 857 | TLS Operating Company | Greenwood VIlge, CO 80111 | Oil & Gas Operator | Dec 2013 |
| 858 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 859 | Tower Oil & Gas Company Inc | Englewood, CO 80111 | Oil & Gas Operator | May 2001 |
| 860 | Tpet, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Mar 2008 |
| 861 | Tracer Energy, Inc. | Graham, TX 76450 | Oil & Gas Operator | Nov 1998 |
| 862 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Dec 2025 |
| 863 | Transfuel Resources Co | Houston, TX 77215 | Oil & Gas Operator | Aug 2013 |
| 864 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 865 | Traynor Oil & Gas Inc | Claremont, CA 91711-2837 | Oil & Gas Operator | Jan 2024 |
| 866 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Feb 2026 |
| 867 | Trepel Petroleum Exploration & | | Oil & Gas Operator | Apr 2014 |
| 868 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Dec 2025 |
| 869 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |
| 870 | Triple L Management Co Inc | Edmond, OK 73025-2908 | Oil & Gas Operator | Apr 2018 |
| 871 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 872 | Triumph Energy Partners LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | Nov 2025 |
| 873 | Tulsa Energy Partners LLC | Tulsa, OK 74103-4461 | Oil & Gas Operator | Dec 2025 |
| 874 | Tulum Corporation | Oklahoma City, OK 73101-0125 | Oil & Gas Operator | Feb 2025 |
| 875 | Turner Resources Inc | Hennessey, OK 73742 | Oil & Gas Operator | Nov 2025 |
| 876 | Twenty First Century Res Inc | Lajolla, CA 92037-7044 | Oil & Gas Operator | Mar 2015 |
| 877 | Twenty/Twenty Oil & Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Dec 2025 |
| 878 | Twisted Resources Inc | Blanchard, OK 73010-8463 | Oil & Gas Operator | Dec 2025 |
| 879 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 880 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |
| 881 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 882 | Unicon Producing Company | Houston, TX 75252 | Gas Operator | Mar 1994 |
| 883 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 884 | Union Texas Petroleum Corp | Houston, TX 77252-2120 | Oil & Gas Operator | Dec 2014 |
| 885 | United Oil Corporation | Denver, CO 80202-3813 | Oil & Gas Operator | Nov 2025 |
| 886 | United Production Company LLC | Edmond, OK 73003 | Oil & Gas Operator | Dec 2025 |
| 887 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Feb 2026 |
| 888 | Validus Energy II Midcon LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2026 |
| 889 | Valjohn Energy Corporation | Dover, OK 73734 | Oil & Gas Operator | Nov 2025 |
| 890 | Van Horn Oil & Gas Inc | Tulsa, OK 74170 | Oil & Gas Operator | Nov 1998 |
| 891 | Vantage Point Operating Co. | Houston, TX 77057 | Oil & Gas Operator | Dec 2014 |
| 892 | Vastar Resources Inc | Houston, TX 77253 | Oil & Gas Operator | Sep 2025 |
| 893 | Vector Exploration Inc | Oklahoma City, OK 73142-4430 | Oil & Gas Operator | Dec 2018 |
| 894 | Veenker Resources Inc | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2025 |
| 895 | Viersen & Cochran Drilling Company | | Oil & Gas Operator | May 2015 |
| 896 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 897 | Vista Energy Inc | Yukon, OK 73085-0827 | Oil & Gas Operator | Mar 2015 |
| 898 | Vitol Inc. | Houston, TX 77098 | Oil & Gas Operator | Sep 2023 |
| 899 | VRC Oil & Gas Operating Co | Oklahoma City, OK 73116-1431 | Oil & Gas Operator | Jun 2019 |
| 900 | W M Energy Corp | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2015 |