Osisko Gold Group Inc.

Three-Year History The primary focus of the Corporation has been to acquire, explore, and if appropriate, develop base metal properties in North America. The following is a summary of the Corporation s development over the three most recently completed financial years. The following is a summary of the Corporation s development over the three most recently completed financial years. Page 4 Table of Contents Financial Year Ended December 31, 2023 Feasibility Study and Technical Report for Cariboo Gold Project On January 3, 2023, the Corporation announced the results of an independent feasibility study on the Cariboo Gold project, an advanced stage exploration project located in the historic Wells-Barkerville mining camp, in the District of Wells, British Columbia (the Cariboo Gold Project ) which have been prepared in accordance with NI 43-101. On January 12, 2023, the Corporation filed the technical report titled NI 43-101 Technical Report, Feasibility Study for the Cariboo Gold Project, District of Wells, British Columbia, Canada in respect of the feasibility study. Tintic Project Initial Mineral Resource Estimate and Technical Report On January 17, 2023, the Corporation announced an initial mineral resource estimate for the Trixie mine, within the wider Tintic project (the Tintic Project ).