Osisko Development (ODV) Investor presentation summary

Strategic vision and leadership

• Advancing the Cariboo Gold Project in Canada, one of few fully permitted, large-scale gold assets in a Tier 1 jurisdiction, with a focus on scalability and district potential.

• Developing the historic Tintic Project in Utah, USA, with significant exploration upside in gold, copper, and other metals.

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

• Strong emphasis on responsible mining, Indigenous partnerships, and community involvement.

Cariboo Gold Project highlights

• 100% owned, underground mine in British Columbia with over 185,000 ha land package and 83 km strike length.

• Feasibility Study (2025) outlines 2.07 Moz probable reserves, 1.61 Moz measured & indicated, and 1.86 Moz inferred resources.

• 10-year mine life, average 190 koz/year gold production (202 koz/year first 5 years), US$1,157/oz AISC.

• After-tax NPV5% of C$943M and IRR of 22.1% at US$2,400/oz gold; significant upside at higher gold prices.

• Fully permitted with BC Mines Act and Environmental Management Act approvals granted in late 2024.

Project development and operations

• 24-month mine build with anticipated first gold in 2028.

• Over 250 personnel on site advancing pre-construction, including waste rock storage, water treatment, and camp expansion.

• 13,000-metre infill drill program in Lowhee Zone to be completed by Q2 2026, supporting resource modeling and mine planning.

• Modern mine design with two ramps, bulk tonnage long-hole mining, and ore sorting to optimize grade and reduce waste.