June 3, 2026

Osisko Development Corp.
Osisko Development Announces Nomination of Keith Mckay to the Board of Directors and Proposes Name Change to Osisko Gold Group Inc. at Upcoming Annual and Special Meeting of Shareholders

Osisko Development Announces Closings of Additional US$75 Million Aggregate Principal Amount of 4.125% Convertible Senior Notes Bringing Total Offering to US$300 Million

Osisko Development to Complete Fourth Deferred Payment Installment in Connection with the Tintic Acquisition

Osisko Development announces closing of Us$225.0 million aggregate principal amount of 4.125% convertible senior notes offering

Osisko Development Announces Pricing of US$275.0 Million Aggregate Principal Amount of 4.125% Convertible Senior Notes Offering (25.0% Conversion Premium)

Osisko Development Announces Proposed Offering of US$275.0 Million Aggregate Principal Amount of Convertible Senior Notes

Osisko Development Appoints Vice President, Sustainable Development

Osisko Development Reports First Quarter 2026 Results

Osisko Development Reports Fourth Quarter and Year-End 2025 Results

Osisko Development Announces Inclusion in the GDXJ

Osisko Development Announces Proceeds of $24.9 Million From Warrant Exercise

Osisko Development Announces Resumption of Planned Site Activities at the Cariboo Gold Project
