Seguela Mine Life Now Exceeds Nine Years At Current Production

VANCOUVER – Jorge A. Ganoza, President and CEO of Fortuna Mining Corp., said, “Séguéla’s mine life now exceeds 9 years at current production rates, with strong potential for further growth. This is supported by exploration drilling completed in the second half of 2025, the results of which have not yet been incorporated into our geological resource models. Building on this exploration upside and our track record of resource and reserve growth, we have initiated a processing plant expansion study that has the potential to increase annual gold production to more than 200,000 ounces.”
As of December 31, 2025, the Séguéla Mine has Proven and Probable Mineral Reserves of 16.0 million tonnes containing 1.54 million ounces of gold.
Between October 31, 2025, and December 31, 2025, Mineral Reserve tonnes increased by 23%, while the average gold grade increased by 7% to 3.01 g/t Au, resulting in a net increase of 31% in contained gold ounces.
Changes in the Séguéla Mine’s Mineral Reserves during this period reflect: 1) Mining-related depletion during the final two months of 2025 totaling 27,600 ounces of gold. 2) The first-time estimation of underground Mineral Reserves at the Sunbird deposit, totaling 3.5 million tonnes at an average grade of 3.60 g/t Au, containing 401,000 ounces of gold.