Mr. Sean Roosen reports

OSISKO GOLD ANNOUNCES MANAGEMENT UPDATE

Further to the Aug. 25, 2026, announcement regarding Osisko Gold Group Inc.'s planned leadership succession transition, Elijah Tyshynski has assumed the role of chief financial officer of the company, effective Oct. 1, 2026, succeeding Alexander Dann.

About Osisko Gold Group Inc.

Osisko Gold is a continental North American gold development company focused on past producing mining camps with district-scale potential. The company's objective is to become an intermediate gold producer through the development of its flagship, fully permitted, 100-per-cent-owned Cariboo gold project, located within the company's broader Cariboo regional land package in central British Columbia, Canada, which hosts numerous prospective exploration targets and provides opportunities for future discoveries. Its Cariboo project pipeline is complemented by the Tintic project, located in the historic East Tintic mining district in Utah, United States, a brownfield property with significant exploration potential, extensive historical mining data and access to established infrastructure. Osisko Gold is focused on developing long-life mining assets in mining-friendly jurisdictions while maintaining a disciplined approach to capital allocation, development risk management and mineral inventory growth.

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