| 601 | Viking Energy Corporation | Odessa, TX 79760 | Oil & Gas Operator | Dec 2021 |
| 602 | Viking International Resources Co., Inc. | | Oil & Gas Operator | Dec 2020 |
| 603 | Virtex Eastern Producing Co., LLC | | Gas Operator | Dec 2021 |
| 604 | W. E. B. Well Tending Service, Inc. | Vienna, WV 26105 | Oil & Gas Operator | Nov 2011 |
| 605 | Waco Oil & Gas Co., Inc. | Glenville, WV 26351-0397 | Oil & Gas Operator | Dec 2021 |
| 606 | Walker Gas Company | Romney, WV 25757-0000 | Oil & Gas Operator | Dec 2018 |
| 607 | Walker Oil And Gas Inc | | Oil & Gas Operator | Jun 2021 |
| 608 | Walker Well Service Inc | Munday, WV 26152 | Oil & Gas Operator | Dec 2021 |
| 609 | Warfield Management, LLC | Newman, GA 30263 | Gas Operator | Dec 2021 |
| 610 | Warren Drilling Co | Dexter City, OH 45727 | Oil & Gas Operator | Dec 2025 |
| 611 | Warren Producers Inc | Bowling Green, KY 42102 | Oil & Gas Operator | Dec 2017 |
| 612 | Wayne Gas Company | | Gas Operator | Dec 2015 |
| 613 | Welch Oil & Gas Company | Parkersburg, WV 26104 | Oil & Gas Operator | Jun 2013 |
| 614 | West Side Exploration, LLC | | Oil & Gas Operator | Jan 2026 |
| 615 | Westmoreland Gas, LLC | | Oil & Gas Operator | Dec 2021 |
| 616 | Weva Oil Corp. | | Oil & Gas Operator | Nov 2019 |
| 617 | Weyerhaeuser Company | Crossett, AR 71635 | Oil & Gas Operator | Sep 1994 |
| 618 | White Gas Company | Barboursville, WV 25504-0000 | Gas Operator | Dec 2017 |
| 619 | Whitnam Oil & Gas Corp. | Glenville, WV 26351 | Oil & Gas Operator | Dec 2009 |
| 620 | Williams Well Surveys Inc. | | Oil & Gas Operator | Dec 1996 |
| 621 | Willow Run Corporation | | Oil & Gas Operator | Dec 2021 |
| 622 | Wilson, Brian K | Fairmont, WV 26554-0148 | Oil & Gas Operator | Dec 2018 |
| 623 | Witco Corporation | Newark, OH 43055 | Oil & Gas Operator | Dec 1995 |
| 624 | Wolf Run Mining LLC | | Oil & Gas Operator | Dec 2021 |
| 625 | WV Wells, LTD | | Oil & Gas Operator | Nov 2021 |
| 626 | Xplor Corporation | | Oil & Gas Operator | Dec 2013 |
| 627 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2026 |
| 628 | Yale Oil Association | Oklahoma City, OK 73105 | Gas Operator | Oct 2013 |
| 629 | Yost & Yost, Inc. | | Oil & Gas Operator | Dec 2020 |
| 630 | Zickefoose, R. L. And W.F. | Burgettstown, PA 15021 | Oil & Gas Operator | Dec 2021 |