News Category Global Banking & Finance Reviews Osisko Continues to Define and Expand Multiple High-Grade Vein Corridors at Valley Zone on Cariboo Gold Project MONTREAL, Jan. 13, 2021 — Osisko Development Corp. (“ Osisko” or the “ Company”) (TSX.V-ODV) is pleased to announce drilling results from the category conversion drill program campaign at the Cariboo Gold Project (“Cariboo”) in central British Columbia. At Valley Zone, 24,000 meters were drilled in 74 holes in 2020. This news release discusses the assay results from holes CM-20-037 to CM-20-063 (Figure 1). Highlights include 9.33 g/t Au over 12.10 meters including 62.9 g/t Au over 0.60 meters in hole CM-20-046 (Figure 2). This Zone has not been drill tested since 2017, and significant potential exists to add both inferred and indicated resource to the deposit. The Company has commenced drilling on the 2021 drill program. A total of ten drill rigs will be active on the property by January 15