Mr. Jorge Ganoza reports

FORTUNA OBTAINS KEY ENVIRONMENTAL APPROVAL FOR DIAMBA SUD GOLD PROJECT IN SENEGAL

Fortuna Mining Corp. has received the environmental decree from Senegal's Ministry of Environment and Ecological Transition approving the environmental and social impact assessment for the Diamba Sud gold mine. This authorization certifies that the project complies with all applicable environmental regulations and has been socially accepted by the project's stakeholders. It marks a decisive step towards obtaining the mining permit following the submission of its application to the Ministry of Energy, Petroleum, and Mines on Feb. 4, 2026.

Jorge A. Ganoza, president and chief executive officer, commented: "Obtaining the environmental permit for our future Diamba Sud gold mine, just nine months from submission to approval, is a clear testament to the quality of our work and demonstrates that mining projects in Senegal can advance on a highly competitive timeline. This milestone also reflects the government of Senegal's commitment to enabling the responsible development of its mining sector." Mr. Ganoza continued, "With this key approval in hand, we will continue advancing early construction works as we move toward the important milestones of completing the feasibility study, followed by a final construction decision in mid-2026."

About Diamba Sud gold project, Senegal

The Diamba Sud gold project is in the late stages of permitting and feasibility. A preliminary economic assessment (PEA) outlined robust project economics (refer to Fortuna news release dated Oct. 15, 2025, "Fortuna delivers robust PEA for Diamba Sud gold project in Senegal: After-tax IRR of 72% and NPV5% of US$563 million using US$2,750 per ounce"). Early works are under way, including camp construction and the placement of purchase orders for critical-path equipment packages. The 2026 project budget is $100-million (U.S.), with a final investment and construction decision anticipated by mid-2026.

About Fortuna Mining Corp.

Fortuna Mining is a Canadian precious metals 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. Fortuna produces gold and silver while creating long-term shared value through efficient production, environmental stewardship and social responsibility.

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