Opportunistic capital raise with net proceeds expected to be used for the development of the Cariboo Gold Project and general corporate purposesA portion of net proceeds expected to be used to purchase cash-settled capped calls to offset potential economic dilution by effectively increasing the conversion premium MONTREAL, May 26, 2026 (GLOBE NEWSWIRE) -- Osisko Development Corp. (NYSE: ODV, TSXV: ODV) ('Osisko Development' or the 'Company') announced today it has closed its previously announced offering of US$225.0 million aggregate principal amount of 4.125% convertible senior notes due 2031 (the 'Notes') in a private placement (the 'Offering') to persons reasonably believed to be qualified institutional buyers pursuant to Rule 144A under U.S. Securities Act of 1933, as amended (the 'Securities Act').