Osisko Development (ODV) Investor Presentation summary

Strategic vision and project portfolio

• Advancing the Cariboo Gold Project in British Columbia, a fully permitted, shovel-ready asset with a 10-year mine life, strong government and Indigenous support, and significant exploration upside.

• Tintic Project in Utah offers high-grade gold and silver resources, with ongoing technical work and exploration potential in a prolific historic mining district.

• San Antonio Project in Mexico features a large land package, completed stockpile processing, and is under strategic review for potential partnerships or sale.

• Focus on scalable, district-scale assets in mining-friendly jurisdictions with existing infrastructure and brownfield advantages.

• Led by an experienced management team with a track record of major mine development and stakeholder engagement.

Cariboo Gold Project highlights

• 100% ownership of >185,000 ha property with 2.07 Moz probable reserves, 1.61 Moz M&I, and 1.86 Moz inferred resources.

• 2025 Feasibility Study: 190 koz/year LOM average gold production, US$1,157/oz AISC, $943M after-tax NPV5%, 22.1% IRR at US$2,400/oz gold.

• Initial capex of $881M, 92.6% recovery rate, first gold expected H2 2027, and robust free cash flow projections.

• Positioned in the lower half of the global gold cost curve, competitive with top Canadian underground mines.

• Significant resource conversion and exploration potential at depth and along strike, with ongoing infill drilling and underground development.

Financing and capital structure

• Secured US$203M in equity financing and a US$450M project financing facility, fully drawn and de-risking project execution.

• Market capitalization of C$904M, cash and equivalents of C$46.3M, and total debt of C$43.8M as of September 2025.

• Institutional investors and analyst coverage from major financial institutions; insiders and management hold a significant stake.