| 1 | Wagner & Wagner | Indiana, PA 15701-1273 | Gas Operator | Dec 2012 |
| 2 | Wainoco Oil & Gas Company | Houston, TX 77024 | Oil & Gas Operator | Dec 2005 |
| 3 | Wallace John J Jr | Cooperstown, PA 16317-1909 | Oil & Gas Operator | Dec 2023 |
| 4 | Wandover Charles T SR | Inverness, FL 34452-7527 | Oil & Gas Operator | Dec 2016 |
| 5 | Warren E & P Inc | Dallas, TX 75240 | Oil & Gas Operator | Dec 2023 |
| 6 | Washington Energy Co LLC | Canonsburg, PA 15317-0400 | Oil & Gas Operator | Dec 2021 |
| 7 | Waste TRMT Corp | Washington, PA 15301-0558 | Oil & Gas Operator | Dec 2023 |
| 8 | WB Prod MGMT Co | Franklin, PA 16323-0107 | Oil & Gas Operator | Dec 2020 |
| 9 | Weaver Carroll A | Knox, PA 16232 | Oil Operator | Dec 1992 |
| 10 | Weinsz Oil & Gas Inc | North Canton, OH 44720 | Oil & Gas Operator | Dec 2003 |
| 11 | Weldbank Energy Corp | Warren, PA 16365-5114 | Oil & Gas Operator | Dec 2023 |
| 12 | Werner Oil Farm | Warren, PA 16365-3608 | Oil & Gas Operator | Dec 2017 |
| 13 | West Texas Operating Co LLC D/B/A Xtreme Energy Co | Victoria, TX 77902-2326 | Oil & Gas Operator | Jan 2024 |
| 14 | Westinghouse Elec Co LLC | Monroeville, PA 15146-2808 | Gas Operator | Dec 2023 |
| 15 | WGM Gas Co Inc | Creekside, PA 15732-8500 | Oil & Gas Operator | Dec 2023 |
| 16 | Whidbey Resources Inc | Hudson, OH 44236 | Oil & Gas Operator | Dec 2016 |
| 17 | Whilton Brooks A | Warren, PA 16365-8410 | Oil & Gas Operator | Dec 2023 |
| 18 | White Oak Farms Inc | Dayton, PA 16222-4325 | Gas Operator | Dec 2023 |
| 19 | Wilkes Energy Inc | Akron, OH 44308 | Oil & Gas Operator | Dec 2022 |
| 20 | Willard M Cline | Bradford, PA 16701-1715 | Oil & Gas Operator | Dec 2022 |
| 21 | William M Mauersberg | Sigel, PA 15860-2402 | Oil & Gas Operator | Dec 2009 |
| 22 | William McIntire Coal Oil & Gas | Shelocta, PA 15774-0171 | Oil & Gas Operator | May 2022 |
| 23 | William Southwell & Son Oil LLC | Warren, PA 16365 | Oil & Gas Operator | Dec 2023 |
| 24 | Wilmoth Clark Exploration & Prod LLC | Glen Campbell, PA 15742-0159 | Gas Operator | Dec 2008 |
| 25 | Wilmoth Interests, Inc. | Marion Center, PA 15759 | Oil & Gas Operator | Dec 2023 |
| 26 | Wind River Exploration Inc | Sewickley, PA 15143 | Oil & Gas Operator | Dec 2023 |
| 27 | Winfall Energy Inc N V | Vandergrift, PA 15690-2001 | Oil & Gas Operator | Dec 2019 |
| 28 | Wood William C | Kittanning, PA 16201-4328 | Oil & Gas Operator | Dec 2018 |