EXHIBIT 99.1 Osisko Development Reports 2022 Drill Results at Trixie, Including: 28.72 g/t Au and 404 g/t Ag over 6.25 m and 27.26 g/t Au and 96.98 g/t Ag over 4.57 m MONTREAL, April 03, 2023 (GLOBE NEWSWIRE) -- Osisko Development Corp. (NYSE: ODV, TSXV: ODV) ("Osisko Development" or the "Company") is pleased to announce underground diamond drilling ("DD") results as part of its ongoing exploration program at its 100%-owned Trixie test mine ("Trixie"), within the Company's wider Tintic Project ("Tintic" or ...

576,000 oz of Au and 1.37 M oz Ag Indicated and 544,000 oz Au and 1.76 M oz of Ag Inferred MONTREAL, June 30, 2022 (GLOBE NEWSWIRE) -- Osisko Development Corp. ("Osisko Development" or the "Company") (ODV TSX.V & NYSE) is pleased to announce an initial open pit resource estimate for the Sapuchi, Golfo de Oro, California, High Life and Calvario Deposits at its San Antonio Project ("San Antonio" or the "Project") in Sonora State, Mexico. San Antonio Project Mineral Resource The MRE incorporates five deposits, ...