Osisko Gaspe Expansion Hole Intersects 133.7 Metres Averaging 1.04% Cu

Executive Summary

• Osisko Metals released results from six new drill holes at the Gaspé Copper project, delivering 26 significant mineralized intercepts that include both infill and expansion intervals.
• Notable high‑grade zones were intersected: Hole 30‑1109 delivered 133.7 m @ 1.04% Cu (expansion) and Hole 30‑1106 delivered a 33.8 m interval @ 1.04% Cu, 3.60 g/t Ag (expansion).
• The data support the company’s plan to upgrade inferred resources to measured/indicated categories and suggest potential lateral extension of a higher‑grade tabular zone eastward toward historic E‑32 Zone.

Key Details

• Hole 30‑1110: 1,091.5 m @ 0.20% Cu (infill & expansion) – includes 735.6 m @ 0.20% Cu (infill) and 355.9 m @ 0.21% Cu (expansion).
• Hole 30‑1109: 133.7 m @ 1.04% Cu, 6.48 g/t Ag (expansion); also 24 m @ 0.36% Cu (infill) and 40.5 m @ 1.35% Cu, 8.29 g/t Ag (infill).
• Hole 30‑1106: 159.1 m @ 0.45% Cu (expansion); includes a high‑grade 33.8 m @ 1.04% Cu, 3.60 g/t Ag interval.
• Hole 30‑1108: 134.8 m @ 0.22% Cu (both infill & expansion) plus additional shallower infill intervals ranging from 44 m to 63 m with Cu grades 0.17–0.20%.
• Hole 30‑1103: Multiple intervals totalling ~530 m of mineralization, highest being 73.5 m @ 0.27% Cu (expansion).
• Hole 30‑1111: 304.5 m @ 0.17% Cu (infill) and 206.3 m @ 0.33% Cu, 2.39 g/t Ag (expansion); also intersected a central porphyry zone with negligible Cu but notable Mo (0.023%).
• Overall intercept summary: 26 mineralized intervals across six holes; lengths range from 20 m to >1,000 m; copper grades from 0.12% to 1.04%; silver up to 8.29 g/t; molybdenum up to 0.023%.
• Resource implication: Results are intended to convert the November 2024 Measured‑Resource Estimate (MRE) to measured/indicated categories and test deeper/lateral extensions, with a planned MRE update in Q1 2026.
• Geological context: Intercepts cut porphyry copper/skarn mineralization; high‑grade tabular zone identified near the E Zone horizon; potential eastward extension over ~800 m lateral distance.
• QA/QC: Intervals reported using a 0.12% CuEq cutoff (20 m minimum); true widths estimated at 90–92%; samples analyzed by ALS Canada Ltd. with standard ICP‑AES/MS methods.

Notable Quotes

“The growth potential of the Gaspé Copper deposit continues to be demonstrated with today’s new high‑grade results… our expansion drilling is exceeding expectations, hand‑in‑hand with the solid infill results on our main resource area.” – Robert Wares, CEO