Pursuant to a resolution passed by the shareholders of the company on June 23, 2026, the company has changed its name from Osisko Development Corp. to Osisko Gold Group Inc. There is no consolidation of capital.

Effective at the opening on Monday, July 20, 2026, the common shares of Osisko Gold Group will commence trading on the TSX Venture Exchange and the common shares of Osisko Development will be delisted. The company is classified as a gold and silver ore mining company (NAICS No. 212220).

Capitalization:  unlimited number of common shares with no par value of which 305,837,837 common shares are issued and outstanding

Escrow:  nil

Transfer agent:  TSX Trust Company

Trading symbol:  OGG (new)

Cusip No.:  68827X 10 5 (new)

Common share purchase warrants set to expire on March 2, 2027

Trading symbol:  OGG.WT.A (new)

Cusip No.:  68827X 13 9 (new)

Common share purchase warrants set to expire on May 27, 2027

Trading symbol:  OGG.WT.U (new)

Cusip No.:  68827X 11 3 (new)

Common share purchase warrants set to expire on Oct. 1, 2029

Trading symbol:  OGG.WT.V (new)

Cusip No.:  68827X 12 1 (new)