Osisko Development Corp. announced drilling results from the 2021 exploration and category conversion drill program campaign at its Cariboo Gold Project("Cariboo") in central British Columbia. A total of 6 diamond drill rigs are currently active on the Project. A total of 147,000 meters have been drilled thus far in 2021, of which 10,000 meters were drilled at Mosquito and 58,000 drilled at Shaft. Recent assay results include holes IM-21-087 to IM-21-101 from Mosquito and Shaft Zones on Island Mountain. IM-21-089 intersected 20.40 g/t Au over 6.55 meters at Shaft Zone and included high grade samples of 92.30 g/t Au over 0.60 meter, 50.70 g/t Au over 0.60 meter, 28.10 g/t Au over 0.60 meter and 22.40 g/t Au over 1.25 meters. IM-21-090 tested both Shaft and Valley Zones, intersected multiple mineralized vein corridors in both zones including 48.10 g/t Au over 2.40 meters with 117.0 g/t Au over 0.90 meter on the Shaft Zone and 5.50 g/t Au over 12.25 meters including 54.5 g/t Au over 0.90 meter on the Valley Zone. Detailed drilling results and a drill hole location plan map are presented at the end of this release.