| 801 | Waste TRMT Corp | Washington, PA 15301-0558 | Oil & Gas Operator | Dec 2024 |
| 802 | WB Prod MGMT Co | Franklin, PA 16323-0107 | Oil & Gas Operator | Dec 2020 |
| 803 | WBM Enterprises | Creekside, PA 15732-8228 | Oil & Gas Operator | Dec 2024 |
| 804 | Weaver Carroll A | Knox, PA 16232 | Oil Operator | Dec 1992 |
| 805 | Weinsz Oil & Gas Inc | North Canton, OH 44720 | Oil & Gas Operator | Dec 2003 |
| 806 | Weldbank Energy Corp | Warren, PA 16365-5114 | Oil & Gas Operator | Dec 2024 |
| 807 | Werner Oil Farm | Warren, PA 16365-3608 | Oil & Gas Operator | Dec 2017 |
| 808 | Wes Oil & Gas LLC | Clarks Mills, PA 16114-1912 | Gas Operator | Dec 2022 |
| 809 | West Texas Operating Co LLC D/B/A Xtreme Energy Co | Victoria, TX 77902-2326 | Oil & Gas Operator | Nov 2024 |
| 810 | Westinghouse Elec Co LLC | Monroeville, PA 15146-2808 | Gas Operator | Dec 2024 |
| 811 | WGM Gas Co Inc | Creekside, PA 15732-8500 | Oil & Gas Operator | Dec 2024 |
| 812 | WHC Oper LLC | Commodore, PA 15729-9109 | Gas Operator | Dec 2023 |
| 813 | Whidbey Resources Inc | Hudson, OH 44236 | Oil & Gas Operator | Dec 2016 |
| 814 | Whilton Brooks A | Warren, PA 16365-8410 | Oil & Gas Operator | Dec 2023 |
| 815 | White Oak Farms Inc | Dayton, PA 16222-4325 | Gas Operator | Dec 2023 |
| 816 | Wilburn Wolfe L | Erie, PA 16506-5039 | Gas Operator | Dec 2000 |
| 817 | Wilkes Energy Inc | Akron, OH 44308 | Oil & Gas Operator | Dec 2022 |
| 818 | Willard M Cline | Bradford, PA 16701-1715 | Oil & Gas Operator | Dec 2022 |
| 819 | William L Horner Energy | Oliveburg, PA 15764-8411 | Gas Operator | Dec 2014 |
| 820 | William M Mauersberg | Sigel, PA 15860-2402 | Oil & Gas Operator | Dec 2009 |
| 821 | William McIntire Coal Oil & Gas | Shelocta, PA 15774-0171 | Oil & Gas Operator | May 2022 |
| 822 | William Southwell & Son Oil LLC | Warren, PA 16365 | Oil & Gas Operator | Dec 2023 |
| 823 | Wilmoth Clark Exploration & Prod LLC | Glen Campbell, PA 15742-0159 | Gas Operator | Dec 2008 |
| 824 | Wilmoth Interests, Inc. | Marion Center, PA 15759 | Oil & Gas Operator | Dec 2024 |
| 825 | Wind River Exploration Inc | Sewickley, PA 15143 | Oil & Gas Operator | Oct 2024 |
| 826 | Windfall Oil & Gas Inc | Falls Creek, PA 15840-2617 | Gas Operator | Dec 2024 |
| 827 | Winfall Energy Inc N V | Vandergrift, PA 15690-2001 | Oil & Gas Operator | Dec 2019 |
| 828 | Wood Drilling LLC | Kittanning, PA 16201 | Gas Operator | Dec 2024 |
| 829 | Wood William C | Kittanning, PA 16201-4328 | Oil & Gas Operator | Dec 2018 |
| 830 | XPR Resources LLC | Canonsburg, PA 15317-5862 | Gas Operator | Dec 2024 |
| 831 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Feb 2025 |
| 832 | Yeagle George W | Warren, PA 16365-0924 | Oil Operator | Dec 2010 |
| 833 | Zama Petro Inc | Clinton, WA 98236-0100 | Oil & Gas Operator | Dec 2023 |
| 834 | Zenith Exploration Co Inc | Washington, PA 15301 | Oil & Gas Operator | Dec 2014 |
| 835 | Zilhaver Brian K | Cambridge Springs, PA 16403-4114 | Gas Operator | Dec 2022 |
| 836 | Zoran Oil & Gas Co | Jefferson, OH 44047 | Oil & Gas Operator | Dec 2023 |