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McEwen's NI 43-101 confirms robust Grey Fox and Lookout Windfall economics

Jul 22, 2026, 12:16 PM EDT1 sourcesAI-analyzed

Why it may matterVerify against the original reporting

Robust PFS-like economics under multiple gold-price scenarios; a clear de-risking catalyst for MUX’s multi-asset growth plan, though near-term price reflects longer development timelines and resource-to-reserve conversion risks.

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What happened, with direct paths to the underlying reporting

McEwen announced NI 43-101 technical reports for Grey Fox in Ontario and Lookout Mountain and Windfall in Nevada. Grey Fox shows a 15-year mine life to 2041 with 980,300 oz at 3.24 g/t Au and strong economics under varying gold prices. Lookout Mountain and Windfall add oxide resources with heap-leach potential, expanding long-term development optionality.

McEwen files NI 43-101 reports for Grey Fox, Lookout Mountain, Windfall.
Grey Fox: 15-year life to 2041; 9.41 Mt at 3.24 g/t Au (980k oz).
Base-case NPV5% $282m, IRR 24.8%; enhanced NPV $841m, IRR 55%.
Lookout Mountain and Windfall add oxide resources with heap-leach potential.
Company aims for 250k–300k gold eq oz/year by 2030; copper exposure via Los Azules.

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