Mr. Jorge Ganoza reports

FORTUNA PUBLISHES ITS 2025 SUSTAINABILITY REPORT

Fortuna Mining Corp. has published its eighth annual sustainability report, highlighting 2025 progress across governance, corporate strategy, risk management and operational performance.

The report outlines Fortuna's continued focus on the sustainability priorities most material to its business and stakeholders, reflecting a year of portfolio consolidation, strengthened systems and operational discipline.

Jorge A. Ganoza, president and chief executive officer, stated: "Two thousand twenty-five was a year of meaningful progress for Fortuna, as we strengthened our operational and sustainability performance while advancing key strategic growth priorities. At the same time, we faced a tragic reminder that our commitment to zero harm must remain unwavering. Sustainability is embedded in every aspect of our business, guiding decision making and reinforcing our long-term commitment to our people, our communities, and responsible mining."

Julien Baudrand, senior vice-president of sustainability, commented: "In 2025, we focused on reinforcing the systems, controls and behaviours to ensure sustainability performance is consistently delivered across our operations. We made tangible progress in critical risk management, water and tailings governance, and climate change action. These efforts strengthen our ability to manage current and future risks pro-actively while supporting the development of new projects."

Strategic highlights

During 2025, Fortuna continued to strengthen its sustainability management culture through the implementation of several key initiatives, including:

• Reinforcing Fortuna's health and safety approach through the critical risk management program, active field leadership initiatives and practical training programs;
• Advancing the company's renewable energy projects helping reduce energy costs in the context of rising fuel prices and its GHG (greenhouse gas) emissions, including the solar plants at the Lindero and Seguela mines. Progressing on tailings management practices in alignment with the Global Industry Standard on Tailings Management (GISTM);
• Integrating the Diamba Sud gold project into Fortuna's sustainability framework and advancing programs to ensure a high level of readiness before construction.

Key facts and figures from the 2025 sustainability report

Governance:

• 63 per cent of directors have expertise in safety, sustainability and ESG (environmental, social and governance);
• 37.5 per cent of board members are women;
• 30 per cent of executive short-term incentive compensation is tied to sustainability performance.

Work force health and safety:

• One fatal incident involving a subcontractor;
• Lost-time injury frequency rate (LTIFR): 0.00;
• Total recordable injury frequency rate (TRIFR): 0.74;
• 100 per cent of operating mines certified under ISO 45001.

Labour relations, human rights and business ethics:

• Zero confirmed cases of human rights violations or corruption;
• 4,286 total workers (employees and contractors);
• 14 per cent female employees;
• 18 per cent female representation in management positions;
• 93 per cent national employees.

Community relations

• Zero significant community disputes or non-technical delays;
• $258-million (U.S.) in contributions to governments;
• $4.36-million (U.S.) invested in community programs;
• 33 per cent of employees from local communities.

Environment

• Zero significant environmental spills;
• Zero water-related regulatory non-compliance incidents;
• 100 per cent of operating mines certified under ISO 14001;
• Carbon intensity: 0.41 tCO2e (tonnes carbon dioxide equivalent) per gold equivalent ounce;
• 17 per cent of energy consumption from renewable sources;
• Water consumption intensity: 0.19 cubic metre per tonne;
• 65 per cent water recycled or reused.

Looking ahead to 2026

In 2026, Fortuna's sustainability priorities remain focused on strengthening operational discipline, risk management and long-term resilience across the business. Key priorities include:

• Continuing to improve effectiveness and consistency of critical risk management, with particular emphasis on field verification activities and contractor health and safety performance;
• Advancing water and tailings governance while continuing the integration of physical climate risk considerations into mining operations and development projects;
• Consolidating sustainability systems across the portfolio, including readiness initiatives at Diamba Sud, to ensure social and environmental considerations are embedded from the earliest stages of development;
• Reinforcing the behaviours, systems and capabilities that support the company's social licence to operate, particularly in areas where water stewardship, land use and community expectations intersect.

The 2025 sustainability report also highlights success stories and sustainability performance across Fortuna's mines and projects in Latin America and West Africa, reflecting the broader impact of the company's activities. The report demonstrates how strong operational performance can advance meaningful social and environmental outcomes, strengthen local communities, and support shared sustainability priorities.

As part of its commitment to transparency, Fortuna prepares its disclosures using internationally recognized standards and guidance frameworks, including SASB, IFRS S1, GRI and TCFD, while continuing to advance toward alignment with IFRS S2. The company also provides expanded sustainability data through its sustainability data book and interactive analyst centre, offering detailed site-level and corporate performance information. Fortuna's 2025 sustainability report is available on the company's website.

Questions and feedback are welcomed at: sustainability@fmcmail.com.

About Fortuna Mining Corp.

Fortuna Mining is a Canadian precious metals mining company with three operating mines and exploration activities in Argentina, Ivory Coast, Guinea, Guyana and Peru, as well as the Diamba Sud gold project located in Senegal. Sustainability is integral to all the compayn's operations and relationships. Fortuna produces gold and silver and generates shared value over the long-term for its stakeholders through efficient production, environmental protection and social responsibility.

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