Fortuna Mining reports high-grade gold intercepts at Diamba Sud Gold Project.

Fortuna Mining Corp. reports additional exploration drilling results from the Southern Arc deposit at the Diamba Sud Gold Project in Senegal, with several high-grade intercepts, including 22.7 g/t Au over 21.6 meters from a downhole depth of 53 meters. The deposit remains open to the south, east, and at depth, with current drilling only extending to approximately 150 meters. Drilling is scheduled to resume shortly.

Title: Fortuna Mining Corp. Reports High-Grade Gold Intercepts at Diamba Sud Gold Project in Senegal

Vancouver, British Columbia, July 2, 2025 - Fortuna Mining Corp. (NYSE: FSM | TSX: FVI) has announced significant exploration drilling results from the Southern Arc deposit at the Diamba Sud Gold Project in Senegal. The company reported several high-grade intercepts, including a notable 22.7 g/t Au over 21.6 meters from a downhole depth of 53 meters. This discovery further demonstrates the potential for resource growth at Diamba Sud.

The drilling program has been a key focus for the Diamba Sud project, with a total of 21,234 meters completed since the previous exploration update. The program has been paused for the rainy season and is expected to resume in mid-September, with further results anticipated by year-end [1].

Key highlights of the latest drilling results include:

- DSDD488: 22.7 g/t Au over 21.6 meters from 53 meters.
- DSDD418: 6.3 g/t Au over 18.2 meters from 31 meters.
- DSDD440: 10.3 g/t Au over 16.8 meters from 30 meters.
- DSDD444: 14.0 g/t Au over 32.0 meters from 30 meters.
- DSDD4621: 9.7 g/t Au over 20.8 meters from 117 meters.
- DSDD4841: 13.3 g/t Au over 31.2 meters from 5 meters.
- DSDD4871: 33.6 g/t Au over 22.4 meters from 31 meters.

These results, along with additional drilling planned for the fourth quarter of 2025, will be included in an updated resource estimate scheduled for the first quarter of 2026. The deposit remains open to the south, east, and at depth, with current drilling extending to approximately 150 meters [1].

Fortuna Mining Corp. emphasizes that sustainability is at the core of its operations, producing gold and silver while creating long-term shared value through efficient production, environmental stewardship, and social responsibility. For more information, please visit the company's website at www.fortunamining.com [2].

References

[1] https://www.globenewswire.com/news-release/2025/08/13/3132351/0/en/Fortuna-drills-22-7-g-t-gold-over-21-6-meters-at-Southern-Arc-Diamba-Sud-Gold-Project-Senegal.html
[2] https://www.fortunamining.com