FORTUNA MINING CORP.

For the period ended Dec 31, 2025. Filed Mar 26, 2026.

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The yearly report of certain Canadian companies, filed under a joint US and Canadian system. It is the main yearly account these companies give US investors, largely as filed in Canada.

FY2025 · Filed Mar 26, 2026

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FSM$9.62+1.5%Stored close · as of Nov 6, 2026

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EX-99.1 · Notes:

Notes:

1.	In some jurisdictions where the Company operates, laws require that a company operating mineral properties must have more than one shareholder. For those jurisdictions, a nominal interest may be held by an individual or other affiliated entity and this may not be represented on the above chart.

2.	All ownership of subsidiaries is 100% unless otherwise indicated.

3.	10% of the issued and outstanding shares of Roxgold Sango S.A. are held by the State of Côte d’Ivoire.

4.	30% of the issued and outstanding shares of High Guinea Gold Corp Pty Ltd. are held by DeSoto Resources Limited.

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