| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Walsh Production Inc | Oil & Gas Operator | Dec 2007 | |
| 2 | Warner Ventures Inc | Oil Operator | Dec 2025 | |
| 3 | Wellstar Corporation | Northglenn, CO 80233 | Oil & Gas Operator | Apr 2026 |
| 4 | Wieser Oil LLC | Oil & Gas Operator | Dec 2025 | |
| 5 | Wind River Exploration Inc | Sewickley, PA 15143 | Oil & Gas Operator | Feb 2026 |
| 6 | Wistrom | Oil Operator | Aug 2019 |