| 801 | Stiglitz Raymond J | Franklin, PA 16323-7760 | Oil & Gas Operator | Dec 2013 |
| 802 | Stilley John M | Butler, PA 16001-1334 | Gas Operator | Dec 2002 |
| 803 | STL Resources LLC | Sewickley, PA 15143-8859 | Gas Operator | Dec 2025 |
| 804 | Stone Energy Corporation | Denver, CO 80202-2828 | Oil & Gas Operator | Oct 2014 |
| 805 | Stone Ridge Energy LLC | Uniontown, PA 15401-6831 | Oil & Gas Operator | Dec 2025 |
| 806 | Stonehaven Energy MGT Co LLC | Clearfield, PA 16830-7342 | Oil & Gas Operator | Dec 2019 |
| 807 | Stonewall Gas Co | Jane Lew, WV 26378 | Oil & Gas Operator | Dec 1999 |
| 808 | Strihan Gas Co | Du Bois, PA 15801-2340 | Gas Operator | Dec 2021 |
| 809 | Stryker Energy LLC | Mayfield VIllag, OH 44143 | Oil & Gas Operator | Dec 2018 |
| 810 | Sullivan & Clark | Youngsville, PA 16371-0194 | Oil & Gas Operator | Dec 1998 |
| 811 | Susquehanna Energies Inc | Punxsutawney, PA 15767-4004 | Oil & Gas Operator | Dec 2025 |
| 812 | Susquehanna Expl & Prod LLC | Glen Campbell, PA 15742-0159 | Gas Operator | Dec 2024 |
| 813 | SV Abs Interest Wetmore Proj | Saint Marys, PA 15857-1729 | Oil & Gas Operator | Dec 2025 |
| 814 | Swamp Angel Energy LLC | Wichita, KS 67220-3900 | Oil & Gas Operator | Dec 2009 |
| 815 | Swanhart Angelo & Deborah | Indiana, PA 15701-6301 | Gas Operator | Dec 2025 |
| 816 | Swepi LP | Houston, TX 77079 | Oil & Gas Operator | Jul 2020 |
| 817 | SWN Production Company, LLC | Spring, TX 77391 | Oil & Gas Operator | Dec 2025 |
| 818 | Sylvan Energy, LLC | Pittsburgh, PA 15211 | Oil & Gas Operator | Feb 2026 |
| 819 | Sylves Robert J | New Florence, PA 15944-7950 | Gas Operator | Dec 2016 |
| 820 | Synd Enterprises Inc | Lakewood, NY 14750-9613 | Oil & Gas Operator | Dec 2006 |
| 821 | T & F Exploration, LP | Pittsburgh, PA 15241-1375 | Oil & Gas Operator | Oct 2025 |
| 822 | T & T Compression Inc | Clymer, PA 15728-1014 | Gas Operator | Dec 2025 |
| 823 | Tag Enterprises Inc | Shelocta, PA 15774-0310 | Gas Operator | Dec 2016 |
| 824 | Tanglewood Expl LLC | Fort Worth, TX 76102-4665 | Gas Operator | Jun 2011 |
| 825 | Target Energy Inc | Indiana, PA 15701-1135 | Oil & Gas Operator | Dec 2013 |
| 826 | Tatonka Oil Co LLC | Columbus, OH 43201-3684 | Oil & Gas Operator | Dec 2024 |
| 827 | Tenaska Res LLC | Canonsburg, PA 15317 | Gas Operator | May 2020 |
| 828 | Ter Ex Inc | Butler, PA 16002-8638 | Gas Operator | Dec 1994 |
| 829 | Terry D Coan | Youngsville, PA 16371-3608 | Oil & Gas Operator | Dec 2021 |
| 830 | Tevebaugh MGMT Co | Baden, PA 15005-0123 | Oil & Gas Operator | Dec 2002 |
| 831 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 832 | Texakoma Oil & Gas Corp | Dallas, TX 75240 | Oil & Gas Operator | Sep 2014 |
| 833 | Texakoma Opr LP | Plano, TX 75024-6679 | Oil & Gas Operator | Dec 2012 |
| 834 | Texas Keystone Inc | Oakmont, PA 15139-2072 | Oil & Gas Operator | Nov 2017 |
| 835 | Texas Meridian Operating Co. Inc | Houston, TX 77079 | Oil & Gas Operator | Oct 1993 |
| 836 | The Gas & Oil Company LLC | Apollo, PA 15613 | Oil & Gas Operator | Dec 2025 |
| 837 | The Production Co | Ligonier, PA 15658-0467 | Oil & Gas Operator | Dec 2012 |
| 838 | The Production Co LLC | Ligonier, PA 15658-0467 | Oil & Gas Operator | Dec 2020 |
| 839 | Theodore W Ochs | Lucinda, PA 16235-3517 | Gas Operator | Dec 2009 |
| 840 | Tilden Marcellus LLC | Houston, TX 77024-1358 | Gas Operator | May 2022 |
| 841 | Timber River Dev Corp | Mayport, PA 16240-2613 | Oil & Gas Operator | Dec 2025 |
| 842 | Timberline Energy Inc | Franklin, PA 16323-0269 | Oil & Gas Operator | Dec 2025 |
| 843 | Timbuck Resources LLC | Fredericktown, OH 43019-0117 | Oil & Gas Operator | Dec 2005 |
| 844 | Timothy Chambers | Punxsutawney, PA 15767-1821 | Gas Operator | Dec 2025 |
| 845 | Tipco | Shreveport, LA 71104-3047 | Oil & Gas Operator | May 1988 |
| 846 | Titus Energy LLC | Corsica, PA 15829-3833 | Oil & Gas Operator | Dec 2024 |
| 847 | Titusville Oil & Gas Assoc Inc | Pleasantville, PA 16341-1705 | Oil Operator | Dec 2025 |
| 848 | TNT Oil Co. | Hamlin, TX 79520 | Oil & Gas Operator | Feb 2026 |
| 849 | Tom A Leeper | Brush Valley, PA 15720-0206 | Oil & Gas Operator | Dec 2024 |
| 850 | Tomson Theodore A | Brackenridge, PA 15014 | Gas Operator | Dec 2025 |
| 851 | Townsend Assoc | Spring Church, PA 15686-1008 | Gas Operator | Dec 2016 |
| 852 | Transamer Petro Corp | Pittsburgh, PA 15222-3510 | Gas Operator | Dec 1985 |
| 853 | Transp Investment Group | Fairview, PA 16415-1530 | Gas Operator | Dec 1999 |
| 854 | Travis Peak Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 855 | Triad Resources Inc | Spring, TX 77389 | Oil & Gas Operator | Dec 2020 |
| 856 | Triana Energy LLC | Charleston, WV 25301-2815 | Gas Operator | Nov 2018 |
| 857 | Trimont Energy LLC | Pittsburgh, PA 15211-1205 | Oil & Gas Operator | Dec 2016 |
| 858 | Trinity Energy Corp | Gibsonia, PA 15044-9106 | Oil & Gas Operator | Dec 2007 |
| 859 | Trinity Mineral Partners LLC | Pittsburgh, PA 15238-2718 | Oil & Gas Operator | Dec 2025 |
| 860 | Triple M Excavating And Hauling LLC | Ford City, PA 16226-6409 | Gas Operator | Dec 2025 |
| 861 | Troyer Energies Inc | Waterford, PA 16441-2809 | Gas Operator | Dec 2014 |
| 862 | Troyer Gas & Oil | Waterford, PA 16441-2843 | Gas Operator | Dec 2001 |
| 863 | Troyer Land Resources | Waterford, PA 16441-0367 | Gas Operator | Dec 2025 |
| 864 | True Oil LLC | Casper, WY 82602 | Oil & Gas Operator | Jan 2026 |
| 865 | Tug Hill Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2021 |
| 866 | Turm Oil Inc | Butler, PA 16002-0471 | Oil & Gas Operator | Dec 2025 |
| 867 | Turner Oliver E | Bridgeville, PA 15017-2822 | Gas Operator | Dec 1998 |
| 868 | TW Phillips Gas Supply Corp | Butler, PA 16001-4904 | Oil & Gas Operator | Dec 2011 |
| 869 | TX Meridian Opr Co Inc | Houston, TX 77079-2461 | Gas Operator | Dec 1989 |
| 870 | Ultra Resources Inc | Houston, TX 77060 | Oil & Gas Operator | Sep 2018 |
| 871 | Union City Boro Muni Auth Erie Cnty | Union City, PA 16438-1326 | Gas Operator | Dec 2024 |
| 872 | United Petro Corp | Columbus, OH 43229-1826 | Gas Operator | Dec 1985 |
| 873 | United Resources Corp | Olean, NY 14760 | Oil & Gas Operator | Dec 2020 |
| 874 | Universal Cyclops Specialty Steel Div | Pittsburgh, PA 15228-2702 | Gas Operator | Dec 1985 |
| 875 | Universal Resources Holdings Inc | Dunkirk, NY 14048 | Oil & Gas Operator | Dec 2024 |
| 876 | Us Energy Dev Corp | Getzville, NY 14068-1558 | Oil & Gas Operator | Dec 2021 |
| 877 | Us Energy Exploration Corp | Rural Valley, PA 16249 | Oil & Gas Operator | Dec 2025 |
| 878 | Us Gypsum Co | Oakfield, NY 14125-9722 | Gas Operator | Dec 2005 |
| 879 | Uscan Oil Inc | Oil City, PA 16301-1412 | Oil & Gas Operator | Dec 1991 |
| 880 | Van Hampton Gas & Oil Co Inc | Pleasantville, PA 16341-0329 | Gas Operator | Dec 2020 |
| 881 | Van Oil Co Inc | Fort Worth, TX 76116 | Oil Operator | Dec 1997 |
| 882 | Vanderhoof Energy Prod LLC | Russell, PA 16345 | Oil & Gas Operator | Dec 2025 |
| 883 | Vantage Energy Appalachia II LLC | Washington, PA 15301-8936 | Gas Operator | Aug 2017 |
| 884 | Vantage Energy Appalachia LLC | Washington, PA 15301-8936 | Gas Operator | Aug 2017 |
| 885 | Vec Energy LLC | Kittanning, PA 16201-5022 | Oil & Gas Operator | Dec 2025 |
| 886 | Venango Energy Partners Inc | Pittsburgh, PA 15211-0134 | Oil Operator | Dec 2025 |
| 887 | Ventura Oil Co | Denver, CO 00000 | Gas Operator | Dec 1985 |
| 888 | Vernard L Shumaker | Apollo, PA 15613-0249 | Gas Operator | Dec 2025 |
| 889 | Vessels Coal Gas Inc | Denver, CO 80202-3539 | Gas Operator | Dec 2019 |
| 890 | Victory Energy Corp | Indiana, PA 15701-8944 | Oil & Gas Operator | Dec 2021 |
| 891 | Viking Resources Corp | Deerfield, OH 44411-0160 | Oil & Gas Operator | Dec 2007 |
| 892 | Viking Resources LLC | Uniontown, OH 44685 | Oil & Gas Operator | Dec 2017 |
| 893 | Vincent Kutch | Kittanning, PA 16201-1137 | Gas Operator | Dec 1994 |
| 894 | Vineyard Oil & Gas Co | North East, PA 16428 | Oil & Gas Operator | Dec 2023 |
| 895 | Vista Opr Inc | Pittsburgh, PA 15241-1633 | Oil & Gas Operator | Dec 2024 |
| 896 | Vista Resources Inc | Pittsburgh, PA 15241-1633 | Oil & Gas Operator | Dec 2015 |
| 897 | W Byrd Yeany Jr & Jane Wiant Yeany | Mayport, PA 16240-1105 | Gas Operator | Dec 2014 |
| 898 | Wagner & Wagner | Indiana, PA 15701-1273 | Gas Operator | Dec 2012 |
| 899 | Wainoco Oil & Gas Company | Houston, TX 77024 | Oil & Gas Operator | Dec 2005 |
| 900 | Wallace John J Jr | Cooperstown, PA 16317-1909 | Oil & Gas Operator | Dec 2025 |