As of April 2026, the has transitioned from an exploration-focused play to a high-priority development asset under the full ownership of Gold Fields , which completed a $2.1 billion acquisition of Osisko Mining in October 2024. While the project is moving toward construction, drilling continues to yield the "bonanza" grades that made the deposit famous. Latest Drilling & Exploration Highlights (Early 2026)
Continued expansion drilling outside of the existing Mineral Resource Estimate (MRE) blocks has confirmed the presence of new high-grade mineralization that remains open for further growth.
Final environmental approvals and a formal Board Investment Decision (FID) are expected in the second half of 2025 or early 2026. Osisko drills more high grades across Windfall ...
Recent drilling efforts are increasingly focused on infill and expansion programs to de-risk the mine plan and test deep extensions of the high-grade zones.
Windfall is ranked as a top 10 gold deposit globally by head grade, with reserves averaging 8.1 g/t gold . As of April 2026, the has transitioned from
Recent infill results (February 2026) continue to show high-grade continuity, with some intercepts reaching average grades of 11.3 g/t Au in the measured category. Project Status and Path to Production
Gold Fields anticipates achieving the first gold pour at Windfall by late Q4 2026 or early 2027 . Final environmental approvals and a formal Board Investment
Recent deep drilling has targeted the projected down-plunge extension of the Lynx 4 zone at vertical depths of nearly 1,700 meters, returning significant results such as 81.8 g/t gold over 3.5 meters .