- Osisko Development Corp. entered into an Investor Rights Agreement with Double Zero Capital LP on **August 15, 2025**.  **[1431852_0001104659-25-085647_tm2524668d1_ex99-1.htm:0]** 
- This agreement was a condition of Double Zero Capital LP's subscription for **36,600,000 units**  **[1431852_0001104659-25-085647_tm2524668d1_ex99-1.htm:0]** , with each unit comprising **one Common Share** and **one-half of one Common Share purchase warrant**.  **[1431852_0001104659-25-085647_tm2524668d1_ex99-4.htm:1]** 
- Each whole warrant entitles Double Zero Capital LP to purchase one additional Common Share at **US$2.56** per share for a period of **24 months** from the issuance date.  **[1431852_0001104659-25-085647_tm2524668d1_ex99-1.htm:0]** **[1431852_0001104659-25-085647_tm2524668d1_ex99-4.htm:1]** 
- Following the completion of the offering and an investment fee payment, Double Zero Capital LP holds **38,064,000 Common Shares** and **18,300,000 Warrants**, representing approximately **16.0%** of the issued and outstanding Common Shares on a non-diluted basis.  **[1431852_0001104659-25-085647_tm2524668d1_ex99-4.htm:2]** 
- The agreement grants Double Zero Capital LP certain rights, including **Board Nomination Rights**.  **[1431852_0001104659-25-085647_tm2524668d1_ex99-1.htm:0]**

Osisko Development (ODV)