Investor Presentaiton

Benchmarking Osisko Min. Artemis Marathon Americas Developers - P/NAV (x) In Construction Americas Producers - P/NAV (x) Wesdome 1.04x 0.47x Lundin Gold 0.76x 0.42x Orla 0.62x 0.37x (1) G Mining 0.35x Coeur 0.55x Sabina Gold 0.33x New Gold 0.53x Skeena 0.32x Victoria 0.50x Osisko Dev. 0.31x Torex 0.45x Ascot 0.30x Calibre 0.44x Belo Sun 0.28x Jaguar 0.43x Perpetua 0.28x Equinox 0.41x Liberty 0.23x Aura 0.33x Bluestone 0.12x Average 0.31x Argonaut 0.13x Average 0.52x Substantial re-rate potential exists as project advances towards production Source: FactSet and company public filings as of 06.30.22. Note: Averages exclude G Mining. (1) Shown pro forma financing package. TSXV:GMIN 35

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