Osisko Metals Announces Significant Increase in Mineral Resources at Gaspé Copper

Base Case Outlines M&I Resources of 1.83 Billion tonnes at 0.27% Cu and Inferred Resources of 0.24 Billion tonnes at 0.41% Cu 2026 Drill Program to Commence at Month End to Further Infill and Expand Resource DPEX Drill Program to Commence in May MONTREAL, April 14, 2026 (GLOBE NEWSWIRE) -- Osisko Metals Incorporated (the “Company” or “Osisko Metals”) ( TSX: OM ; OTCQX: OMZNF ) is pleased to announce an updated Mineral Resource Estimate (“MRE”) for the Gaspé Copper Project, located in Eastern Quebec, following 118,000 metres of drilling completed in 2025. The updated MRE (Table 1) includes base case, pit-constrained resources comprising 1,834 million tonnes averaging 0.27% Cu (0.32% CuEq) of Measured and Indicated categories (M&I), and 239 million tonnes averaging 0.41% Cu (0.46% CuEq) of Inferred category.