FORTUNA MINING CORP.

Business of the Company Fortuna is engaged in precious and base metals mining and related activities in Latin America and West Africa, including exploration, extraction, and processing. The Company’s principal products are gold and silver, although it also produces and sells lead and zinc. As at December 31, 2025, Fortuna: operates the Lindero open pit gold mine (the Lindero Mine ) (100% ownership) in northern Argentina; operates the underground Caylloma silver, lead and zinc mine (the Caylloma Mine ) (100% ownership) in southern Peru, ANNUAL INFORMATION FORM Page | 8 FORTUNA MINING CORP. operates the S gu la open pit gold mine (the S gu la Mine ) (90% ownership) in northwestern C te d’Ivoire; and is developing the advanced exploration stage Diamba Sud gold project (the Diamba Sud Project ) in Senegal. During 2025, Fortuna completed the divestment of the Yaramoko mine in Burkina Faso which had a limited remaining life of Mineral Reserves, together with its other subsidiaries that held exploration permits in the country, thus ceasing to have any operations in Burkina Faso. In addition, during the year, Fortuna completed the sale of its San Jose mine in Oaxaca, Mexico which had been placed on care and maintenance since late 2024 as it had exhausted its Mineral Reserves. See Three-Year History and Recent Developments 2025 Developments Divestments below.