| 1 | W 10 Holdings Inc | | Oil & Gas Operator | Dec 1998 |
| 2 | W B Osborn Oil And Gas Operations LTD | | Oil Operator | Aug 2025 |
| 3 | W W Energy Corp | | Oil & Gas Operator | Sep 2025 |
| 4 | W W Energy Corp And Flynn Energy | | Oil & Gas Operator | Oct 2024 |
| 5 | Wadi Petroleum Inc | Houston, TX 77014 | Oil & Gas Operator | May 2018 |
| 6 | Wagner And Brown LTD Dba Wagner And Brown LTD | | Oil & Gas Operator | Sep 2002 |
| 7 | Wagner Gas And Oil LLC | | Oil Operator | Sep 2025 |
| 8 | Wagner Oil And Gas | | Oil & Gas Operator | Dec 2016 |
| 9 | Wainoco Oil & Gas Company | Houston, TX 77024 | Oil & Gas Operator | Dec 2005 |
| 10 | Ward M Haggard Oil And Gas Exploration Inc | | Oil Operator | Oct 2025 |
| 11 | Ward Williston Drilling Co | | Oil & Gas Operator | Dec 1994 |
| 12 | Weitzman Irvin | | Oil & Gas Operator | Sep 1988 |
| 13 | Weitzman Resources Inc | | Oil & Gas Operator | Jun 2022 |
| 14 | Well Management Services Inc | | Oil & Gas Operator | Dec 2001 |
| 15 | Wellmaster Production Co LLC | | Oil & Gas Operator | Jul 2015 |
| 16 | West Bay Exploration Company | Muenster, TX 76252 | Oil & Gas Operator | Sep 2025 |
| 17 | West Hopkins Petroleum Co LP | | Oil & Gas Operator | Sep 2025 |
| 18 | West Side Exploration, LLC | | Oil & Gas Operator | Oct 2025 |
| 19 | Western Reserves Oil Co Inc | Midland, TX 79705 | Oil & Gas Operator | Oct 2020 |
| 20 | Western Reserves Oil Co Inc And Sullivan And Co | | Oil & Gas Operator | Jul 2001 |
| 21 | White Pine Production LLC | | Oil & Gas Operator | Oct 2025 |
| 22 | White River Production LLC | | Oil Operator | Oct 2025 |
| 23 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Dec 2025 |
| 24 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 25 | Whitney Oil And Gas Corp | | Oil & Gas Operator | Oct 1988 |
| 26 | Wicklund Enterprises Inc | | Oil Operator | Dec 2024 |
| 27 | Winterfield Corp | | Oil Operator | Nov 2024 |
| 28 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 29 | Wisley Robert | | Oil & Gas Operator | Dec 1994 |
| 30 | Wolverine Environmental Production Inc | | Oil & Gas Operator | Sep 2000 |
| 31 | Wolverine Gas And Oil Company Of Michigan LLC | | Oil & Gas Operator | Aug 2025 |