Resource Estimate
Osisko Metals Announces Significant Increase in Mineral Resources at Gaspe Copper
Osisko Metals Doubles Copper Resource as Gaspé Project Enters World-Class Tier

Executive Summary
- On April 14, 2026, Osisko Metals announced an updated pit-constrained Mineral Resource Estimate (MRE) for the Gaspé Copper Project following a 118,000-metre drilling campaign in 2025.
- The base case MRE identifies one of North America's largest undeveloped copper-molybdenum deposits with Measured and Indicated (M&I) resources totaling 1.83 billion tonnes.
- Total M&I Resources contain 10.77 billion lbs (4.88 million tonnes) Copper, 673.2 million lbs Molybdenum, and 92.8 Moz Silver at a 0.32% CuEq cut-off.
- This represents a 119% increase in copper metal content compared to the previous Indicated Resource reported on November 14, 2024.
- Key drivers for expansion include higher long-term copper price assumptions ($4.50/lb), geological reinterpretation extending mineralization south into skarns/hornfels, and a lowered cut-off grade (0.09% CuEq).
- Future plans include a minimum 50,000-metre drill program starting May 2026 to convert Inferred resources and test depth extensions at the Porphyry Mountain deposit.
Material Impact
- The news is genuinely new regarding the specific tonnage and metal content figures, confirming the resource growth anticipated since late 2025 drilling updates.
- A 119% increase in copper metal content is significant for a development-stage asset, effectively doubling the scale of the deposit's economic potential relative to the previous baseline.
- The stock price has already rallied approximately 3x from April 2025 lows ($0.40) to current levels ($1.51), suggesting much of the "resource growth" thesis was priced in during the Q4 2025 financing and drilling campaigns.
- While the magnitude is impressive, the reliance on higher metal price assumptions ($4.50/lb Cu vs historical averages) introduces sensitivity risk if spot prices do not sustain these levels.
- The news validates the technical work done by management but does not eliminate execution risks associated with permitting, feasibility studies (PEA/DFS), and capital intensity required to develop a 1.83 billion tonne deposit.
OM · Price
Company Overview
- Company: Osisko Metals Inc. is a Canadian mining company focused on copper exploration and development.
- Flagship Project: Gaspé Copper Project in Québec, Canada. It is an open-pit copper-molybdenum-silver deposit.
- Development Stage: Advanced Exploration / Pre-Feasibility. The project has moved from initial resource definition to a massive MRE update, positioning it for feasibility studies.
- Other Assets: Pine Point Zinc Project (mentioned in financing use of proceeds), though Gaspé Copper is the primary value driver.
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Jun 09, 2026 · 06:00