| 1 | W C Investments LTD | Salt Lake City, UT 84120 | Oil & Gas Operator | Aug 2000 |
| 2 | Wainoco Oil & Gas Company | Houston, TX 77024 | Oil & Gas Operator | Dec 2005 |
| 3 | Walker Energy Group | Houston, TX 77215-1089 | Oil & Gas Operator | Jun 1992 |
| 4 | Walker Explor & Prod Corp | Unknown, UT 99999 | Oil & Gas Operator | Dec 1989 |
| 5 | Wapiti Operating, LLC | Houston, TX 77043 | Oil & Gas Operator | Dec 2025 |
| 6 | Warren American Oil Co | Tulsa, OK 74147 | Oil & Gas Operator | Oct 2025 |
| 7 | Wasatch Oil & Gas Corp | Farmington, UT 84025-0699 | Oil & Gas Operator | Mar 2002 |
| 8 | Webb, Max D | Farmington, NM 87499 | Oil Operator | Dec 2022 |
| 9 | Weger Petroleum Corp | Dallas, TX 75251 | Oil Operator | Jan 1987 |
| 10 | Wem Operating, LLC | Provo, UT 84604 | Oil & Gas Operator | Sep 2025 |
| 11 | Wesco Operating Inc | Casper, WY 82602 | Oil & Gas Operator | Oct 2025 |
| 12 | Wesgra Corporation | Mexican Hat, UT 84531 | Oil & Gas Operator | Oct 2025 |
| 13 | Wessely Energy Company | Dallas, TX 75206 | Oil & Gas Operator | May 2001 |
| 14 | Western Alliance Petroleum | | Oil & Gas Operator | Dec 1987 |
| 15 | Western Natural Gas | | Oil & Gas Operator | Aug 1974 |
| 16 | Western Resources And Clean Energy, LLC | Manti, UT 84642 | Oil & Gas Operator | Oct 2025 |
| 17 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 18 | Weststar Exploration Co | Houston, TX 77027 | Oil & Gas Operator | Nov 2025 |
| 19 | Wexpro Company | Rock Springs, WY 82902-0458 | Oil & Gas Operator | Sep 2025 |
| 20 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 21 | Whitley, William W | Denver, CO 80209 | Oil & Gas Operator | Dec 1983 |
| 22 | Whitmar Exploration Company | Denver, CO 80202 | Oil & Gas Operator | Aug 2025 |
| 23 | Wildrose Resources Corp | Englewood, CO 80110-6007 | Oil & Gas Operator | Mar 2004 |
| 24 | Willard Pease Drilling Co | Grand Junction, CO 81501 | Oil & Gas Operator | Dec 1983 |
| 25 | William G Bush | Grand Junction, CO 81506 | Oil & Gas Operator | Jun 2012 |
| 26 | Williams Production RMT Company | Denver, CO 80202 | Oil & Gas Operator | Oct 2010 |
| 27 | Willstar Energy GP, LLC | Houston, TX 77279 | Oil & Gas Operator | Sep 2013 |
| 28 | Wilshire Oil Co. Of Texas | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2004 |
| 29 | Wind River Resources Corp | Park City, UT 84098 | Oil & Gas Operator | Jan 2020 |
| 30 | Winds Exploration And Production, LLC | Houston, TX 77032 | Gas Operator | Jan 2024 |
| 31 | Wintershall Oil & Gas Corp | Houston, TX 77027 | Oil & Gas Operator | Jul 1989 |
| 32 | Wold Oil Properties Inc | Denver, CO 80203 | Oil & Gas Operator | Feb 2018 |
| 33 | Wolverine Gas & Oil Company Of Utah, LLC | Grand Rapids, MI 49503-2616 | Oil & Gas Operator | Sep 2025 |
| 34 | Woosley, James P | Moab, UT 84532 | Oil & Gas Operator | Aug 2025 |
| 35 | Wrights Drilling | Cortez, CO 81321 | Oil & Gas Operator | Oct 1983 |