Osisko Metals (OM) Corporate presentation summary

Strategic positioning and leadership

• Positioned as a leading copper development company in Canada with a strong track record of shareholder returns and experienced management team.

• Backed by major institutional and strategic investors, including Agnico Eagle, Hudbay, Franco-Nevada, CDPQ, Glencore, Gold Fields, and OR Royalties, who collectively own about 80% of shares.

• Strong balance sheet with C$180.9M in cash (fully diluted) and a recent C$32.5M private placement.

Gaspé Copper project highlights

• One of North America's largest undeveloped copper projects, with significant infrastructure in place and located near a deep-sea port and power substation.

• Current in-pit measured and indicated resource of 1.83 Bt at 0.27% Cu and 0.017% Mo, and inferred resource of 0.24 Bt at 0.41% Cu and 0.016% Mo.

• 2026 MRE outlines 10.8 Blbs of contained copper in M&I resources and 2.2 Blbs in inferred resources at a 0.16% CuEq cut-off.

• Large, long mine life with a low strip ratio of 1.57 and a modelled pit shell of 2.3 x 3.2 km, up to 1.15 km deep.

• Metallurgical tests indicate 89–91% copper recoveries and concentrate grades of 25% copper.

Project development and exploration

• Fully funded 50,000-metre drill program in 2026 with four rigs, targeting resource conversion, expansion, and higher-grade skarn zones.

• Historical and ongoing drilling at Porphyry Mountain shows significant deep mineralization, with intervals such as 852m @ 0.70% Cu, 2.92 g/t Ag, and 0.062% Mo.

• Project fast-tracked with updated MRE in Q1 2026 and a six-year timeline to potential mine start-up in 2032.