Osisko Development Announces C$30 Million Bought Deal LIFE Offering of National and BC Flow-Through Shares

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MONTREAL, Oct. 08, 2025 (GLOBE NEWSWIRE) -- Osisko Development Corp. (NYSE: ODV, TSXV: ODV) ("Osisko Development" or the "Company") is pleased to announce that it has entered into an agreement with National Bank Financial Inc., BMO Capital Markets and RBC Capital Markets, acting as co-lead underwriters and co-bookrunners (collectively, the "Underwriters"), pursuant to which the Underwriters have agreed to purchase (or arrange for substituted purchasers to purchase), on a "bought deal" private placement basis pursuant to the LIFE Exemption (as defined herein), two tranches of flow-through shares for aggregate gross proceeds of C$30,010,020 (the "Offering"), as follows:

• National Flow-Through Shares: 2,990,000 common shares of the Company (the "FT Shares") that will qualify as "flow-through shares" within the meaning of subsection 66(15) of the Income Tax Act (Canada) (the "Tax Act") at a price of C$6.69 per FT Share for gross proceeds of C$20,003,100; and
  
• British Columbia Flow-Through Shares: 1,444,000 common shares of the Company to certain eligible British Columbia resident subscribers (the "BC FT Shares", and together with the FT Shares, the "Flow-Through Shares") that will qualify as "flow-through shares" within the meaning of subsection 66(15) of the Tax Act at a price of C$6.93 per BC FT Share for gross proceeds of C$10,006,920.
  

The Company will use an amount equal to the aggregate gross proceeds of the Offering to incur eligible "Canadian exploration expenses" that will qualify as (i) "flow-through mining expenditures" within the meaning of the Tax Act, and (ii) in respect of the BC FT Shares purchased by eligible British Columbia purchasers, "BC flow-through mining expenditures" that meet the criteria set forth in subsection 4.721(1) of the Income Tax Act (British Columbia), in respect of the exploration activities on the Company's properties in British Columbia (the "Qualifying Expenditures"). The Qualifying Expenditures will be incurred on or before December 31, 2026 and will be renounced by the Company to the initial purchasers of the Flow-Through Shares with an effective date no later than December 31, 2025.