| 701 | The Gas & Oil Company LLC | Apollo, PA 15613 | Oil & Gas Operator | Dec 2025 |
| 702 | The Production Co | Ligonier, PA 15658-0467 | Oil & Gas Operator | Dec 2012 |
| 703 | The Production Co LLC | Ligonier, PA 15658-0467 | Oil & Gas Operator | Dec 2020 |
| 704 | Tilden Marcellus LLC | Houston, TX 77024-1358 | Gas Operator | May 2022 |
| 705 | Timberline Energy Inc | Franklin, PA 16323-0269 | Oil & Gas Operator | Dec 2025 |
| 706 | Timbuck Resources LLC | Fredericktown, OH 43019-0117 | Oil & Gas Operator | Dec 2005 |
| 707 | Timothy Chambers | Punxsutawney, PA 15767-1821 | Gas Operator | Dec 2025 |
| 708 | Tipco | Shreveport, LA 71104-3047 | Oil & Gas Operator | May 1988 |
| 709 | Titusville Oil & Gas Assoc Inc | Pleasantville, PA 16341-1705 | Oil Operator | Dec 2025 |
| 710 | TNT Oil Co. | Hamlin, TX 79520 | Oil & Gas Operator | Jun 2026 |
| 711 | Tom A Leeper | Brush Valley, PA 15720-0206 | Oil & Gas Operator | Dec 2024 |
| 712 | Transamer Petro Corp | Pittsburgh, PA 15222-3510 | Gas Operator | Dec 1985 |
| 713 | Travis Peak Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2026 |
| 714 | Triad Resources Inc | Spring, TX 77389 | Oil & Gas Operator | Dec 2020 |
| 715 | Triana Energy LLC | Charleston, WV 25301-2815 | Gas Operator | Nov 2018 |
| 716 | Trimont Energy LLC | Pittsburgh, PA 15211-1205 | Oil & Gas Operator | Dec 2016 |
| 717 | Trinity Energy Corp | Gibsonia, PA 15044-9106 | Oil & Gas Operator | Dec 2007 |
| 718 | Trinity Mineral Partners LLC | Pittsburgh, PA 15238-2718 | Oil & Gas Operator | Dec 2025 |
| 719 | Troyer Energies Inc | Waterford, PA 16441-2809 | Gas Operator | Dec 2014 |
| 720 | Troyer Gas & Oil | Waterford, PA 16441-2843 | Gas Operator | Dec 2001 |
| 721 | True Oil LLC | Casper, WY 82602 | Oil & Gas Operator | Apr 2026 |
| 722 | Tug Hill Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2021 |
| 723 | Turm Oil Inc | | Oil & Gas Operator | Dec 2025 |
| 724 | TW Phillips Gas Supply Corp | Butler, PA 16001-4904 | Oil & Gas Operator | Dec 2011 |
| 725 | Ultra Resources Inc | Houston, TX 77060 | Oil & Gas Operator | Sep 2018 |
| 726 | Union City Boro Muni Auth Erie Cnty | Union City, PA 16438-1326 | Gas Operator | Dec 2024 |
| 727 | United Resources Corp | Olean, NY 14760 | Oil & Gas Operator | Dec 2020 |
| 728 | Universal Cyclops Specialty Steel Div | Pittsburgh, PA 15228-2702 | Gas Operator | Dec 1985 |
| 729 | Universal Resources Holdings Inc | Dunkirk, NY 14048 | Oil & Gas Operator | Dec 2024 |
| 730 | Us Energy Dev Corp | Getzville, NY 14068-1558 | Oil & Gas Operator | Dec 2021 |
| 731 | Us Energy Exploration Corp | Rural Valley, PA 16249 | Oil & Gas Operator | Feb 2026 |
| 732 | Us Gypsum Co | Oakfield, NY 14125-9722 | Gas Operator | Dec 2005 |
| 733 | Uscan Oil Inc | Oil City, PA 16301-1412 | Oil & Gas Operator | Dec 1991 |
| 734 | Van Hampton Gas & Oil Co Inc | Pleasantville, PA 16341-0329 | Gas Operator | Dec 2020 |
| 735 | Van Oil Co Inc | Fort Worth, TX 76116 | Oil Operator | Dec 1997 |
| 736 | Vanderhoof Energy Prod LLC | Russell, PA 16345 | Oil & Gas Operator | Dec 2025 |
| 737 | Vantage Energy Appalachia II LLC | Washington, PA 15301-8936 | Gas Operator | Aug 2017 |
| 738 | Vantage Energy Appalachia LLC | Washington, PA 15301-8936 | Gas Operator | Aug 2017 |
| 739 | Vec Energy LLC | Kittanning, PA 16201-5022 | Oil & Gas Operator | Mar 2026 |
| 740 | Venango Energy Partners Inc | Pittsburgh, PA 15211-0134 | Oil Operator | Dec 2025 |
| 741 | Ventura Oil Co | Denver, CO 00000 | Gas Operator | Dec 1985 |
| 742 | Vernard L Shumaker | Apollo, PA 15613-0249 | Gas Operator | Dec 2025 |
| 743 | Vessels Coal Gas Inc | Denver, CO 80202-3539 | Gas Operator | Dec 2025 |
| 744 | Victory Energy Corp | Indiana, PA 15701-8944 | Oil & Gas Operator | Dec 2021 |
| 745 | Viking Resources Corp | Deerfield, OH 44411-0160 | Oil & Gas Operator | Dec 2007 |
| 746 | Viking Resources LLC | Uniontown, OH 44685 | Oil & Gas Operator | Dec 2017 |
| 747 | Vineyard Oil & Gas Co | North East, PA 16428 | Oil & Gas Operator | Dec 2023 |
| 748 | Vista Opr Inc | Pittsburgh, PA 15241-1633 | Oil & Gas Operator | Dec 2024 |
| 749 | Vista Resources Inc | Pittsburgh, PA 15241-1633 | Oil & Gas Operator | Dec 2015 |
| 750 | Wagner & Wagner | Indiana, PA 15701-1273 | Gas Operator | Dec 2012 |
| 751 | Wainoco Oil & Gas Company | Houston, TX 77024 | Oil & Gas Operator | Dec 2005 |
| 752 | Wallace John J Jr | Cooperstown, PA 16317-1909 | Oil & Gas Operator | Dec 2025 |
| 753 | Wandover Charles T SR | Inverness, FL 34452-7527 | Oil & Gas Operator | Dec 2025 |
| 754 | Warren E & P Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2026 |
| 755 | Washington Energy Co LLC | Canonsburg, PA 15317-0400 | Oil & Gas Operator | Dec 2024 |
| 756 | Waste TRMT Corp | Washington, PA 15301-0558 | Oil & Gas Operator | Dec 2024 |
| 757 | WB Prod MGMT Co | Franklin, PA 16323-0107 | Oil & Gas Operator | Dec 2020 |
| 758 | WBM Enterprises | Creekside, PA 15732-8228 | Oil & Gas Operator | Dec 2025 |
| 759 | Weaver Carroll A | Knox, PA 16232 | Oil Operator | Dec 1992 |
| 760 | Weinsz Oil & Gas Inc | North Canton, OH 44720 | Oil & Gas Operator | Dec 2003 |
| 761 | Weldbank Energy Corp | Warren, PA 16365-5114 | Oil & Gas Operator | Dec 2025 |
| 762 | Werner Oil Farm | Warren, PA 16365-3608 | Oil & Gas Operator | Dec 2025 |
| 763 | Wes Oil & Gas LLC | Clarks Mills, PA 16114-1912 | Gas Operator | Dec 2025 |
| 764 | West Texas Operating Co LLC D/B/A Xtreme Energy Co | Victoria, TX 77902-2326 | Oil & Gas Operator | Mar 2026 |
| 765 | Westinghouse Elec Co LLC | Monroeville, PA 15146-2808 | Gas Operator | Dec 2025 |
| 766 | WGM Gas Co Inc | Creekside, PA 15732-8500 | Oil & Gas Operator | Dec 2025 |
| 767 | WHC Oper LLC | Commodore, PA 15729-9109 | Gas Operator | Dec 2025 |
| 768 | Whidbey Resources Inc | Hudson, OH 44236 | Oil & Gas Operator | Dec 2016 |
| 769 | Whilton Brooks A | Warren, PA 16365-8410 | Oil & Gas Operator | Dec 2024 |
| 770 | White Oak Farms Inc | Dayton, PA 16222-4325 | Gas Operator | Dec 2025 |
| 771 | Wilkes Energy Inc | Akron, OH 44308 | Oil & Gas Operator | Dec 2022 |
| 772 | Willard M Cline | Bradford, PA 16701-1715 | Oil & Gas Operator | Dec 2022 |
| 773 | William L Horner Energy | Oliveburg, PA 15764-8411 | Gas Operator | Dec 2014 |
| 774 | William M Mauersberg | Sigel, PA 15860-2402 | Oil & Gas Operator | Dec 2009 |
| 775 | William McIntire Coal Oil & Gas | Shelocta, PA 15774-0171 | Oil & Gas Operator | May 2022 |
| 776 | William Southwell & Son Oil LLC | Warren, PA 16365 | Oil & Gas Operator | Dec 2025 |
| 777 | Wilmoth Clark Exploration & Prod LLC | Glen Campbell, PA 15742-0159 | Gas Operator | Dec 2008 |
| 778 | Wilmoth Interests, Inc. | Marion Center, PA 15759 | Oil & Gas Operator | Dec 2025 |
| 779 | Wind River Exploration Inc | Sewickley, PA 15143 | Oil & Gas Operator | Feb 2026 |
| 780 | Winfall Energy Inc N V | Vandergrift, PA 15690-2001 | Oil & Gas Operator | Dec 2025 |
| 781 | Wood Drilling LLC | Kittanning, PA 16201 | Gas Operator | Dec 2025 |
| 782 | Wood William C | Kittanning, PA 16201-4328 | Oil & Gas Operator | Dec 2018 |
| 783 | XPR Resources LLC | Canonsburg, PA 15317-5862 | Gas Operator | Mar 2026 |
| 784 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Jun 2026 |
| 785 | Yeagle George W | Warren, PA 16365-0924 | Oil Operator | Dec 2010 |
| 786 | Yellowbird Energy LLC | Canonsburgh, PA 15317 | Gas Operator | Dec 2025 |
| 787 | Zama Petro Inc | Clinton, WA 98236-0100 | Oil & Gas Operator | Dec 2025 |
| 788 | Zenith Exploration Co Inc | Washington, PA 15301 | Oil & Gas Operator | Dec 2014 |
| 789 | Zoran Oil & Gas Co | Jefferson, OH 44047 | Oil & Gas Operator | Dec 2025 |