EXHIBIT 99.1 Osisko Development Reports Third Quarter 2025 Results (All dollar amounts are expressed in Canadian dollars, unless stated otherwise) HIGHLIGHTS Q3 2025 (at September 30, 2025) Subsequent to Q3 2025 MONTREAL, Nov. 10, 2025 (GLOBE NEWSWIRE) -- Osisko Development Corp. (NYSE: ODV, TSXV: ODV) ("Osisko Development" or the "Company") reports its financial and operating results for the three months ended September 30, 2025 ("Q3 2025"). Q3 2025 HIGHLIGHTS Operating, Financial and Corporate Updates: ~$ ...