Mr. Jorge Ganoza reports

FORTUNA FILES FEASIBILITY STUDY TECHNICAL REPORT FOR THE DIAMBA SUD GOLD PROJECT, SENEGAL

Fortuna Mining Corp., in accordance with National Instrument 43-101 (Standards of Disclosure for Mineral Projects), has filed a technical report entitled "Diamba Sud Gold Project, Kedougou Region, Senegal," with an effective date of June 30, 2026, supporting the results of the feasibility study previously announced in Fortuna's news release dated June 29, 2026.

The technical report is available on the company's website, and on SEDAR+ and on EDGAR under the company's profile.

About Fortuna Mining Corp.

Fortuna Mining is a Canadian precious metal mining company with three operating mines and a portfolio of exploration projects in Argentina, Ivory Coast, Guinea, Guyana and Peru, as well as the Diamba Sud gold project in Senegal. Sustainability is at the core of the company's operations and stakeholder relationships. The company produces gold and silver while creating long-term shared value through efficient production, environmental stewardship and social responsibility.