Vancouver, British Columbia, June 15, 2026: Fortuna Mining Corp. (NYSE: FSM | TSX: FVI) - https://www.commodity-tv.com/ondemand/companies/profil/fortuna-mining-inc/ - announces that the Company 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 February 4, 2026.
Jorge A. Ganoza, President and CEO, 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 October 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 underway, including camp construction and the placement of purchase orders for critical-path equipment packages. The 2026 project budget is US$100 million, with a final investment and construction decision anticipated by mid-2026.
The PEA is preliminary in nature and includes inferred mineral resources that are considered too speculative geologically to have the economic considerations applied to them that would enable them to be categorized as mineral reserves; as such, there is no certainty that the PEA results will be realized. Mineral resources that are not mineral reserves do not have demonstrated economic viability1.
Note:
- Refer to the table in Appendix 2 on page 5 of this release for a summary of the PEA’s key assumptions, operational parameters and economic results and values.
About Fortuna Mining Corp.
Fortuna Mining Corp. is a Canadian precious metals mining company with three operating mines and a portfolio of exploration projects in Argentina, Côte d’Ivoire, Guinea, Guyana, and Peru, as well as the Diamba Sud Gold Project in Senegal. Sustainability is at the core of our operations and stakeholder relationships. We produce gold and silver while creating long-term shared value through efficient production, environmental stewardship, and social responsibility. For more information, please visit our website at www.fortunamining.com
ON BEHALF OF THE BOARD
Jorge A. Ganoza
President, CEO, and Director
Fortuna Mining Corp.
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