FVI.TO · 2026-05-28 12:00:00

Fortuna publishes its 2025 Sustainability Report

Corporate Updates

NEWS RELEASE

Vancouver, May 28, 2026: Fortuna Mining Corp. (NYSE: FSM | TSX: FVI) is pleased to announce

the publication of 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 CEO, stated, “2025 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 behaviors 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 proactively 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 our renewable energy projects helping reduce energy costs in the context of rising fuel

prices and our GHG emissions, including the solar plants at the Lindero and Séguéla 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.

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Key facts and figures from the 2025 Sustainability Report:

Governance

• 63% of directors have expertise in safety, sustainability, and ESG

• 37.5% of Board members are women

• 30% of executive short-term incentive compensation is tied to sustainability performance

Workforce 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% of operating mines certified under ISO 45001

Labor Relations, Human Rights, and Business Ethics

• Zero confirmed cases of human rights violations or corruption

• 4,286 total workers (employees and contractors)

• 14% female employees

• 18% female representation in management positions

• 93% national employees

Community Relations

• Zero significant community disputes or non-technical delays

• US$258 million in contributions to governments

• US$4.36 million invested in community programs

• 33% of employees from local communities

Environment

• Zero significant environmental spills

• Zero water-related regulatory non-compliance incidents

• 100% of operating mines certified under ISO 14001

• Carbon intensity: 0.41 tCO₂e per gold equivalent ounce

• 17% of energy consumption from renewable sources

• Water consumption intensity: 0.19 m³ per tonne

• 65% water recycled or reused

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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 behaviors, systems, and capabilities that support the Company’s social license 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 Center, offering detailed

site-level and corporate performance information.

Fortuna’s 2025 Sustainability Report is available on our website at www.fortunamining.com

Questions and feedback are welcomed at: [email protected]

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About Fortuna Mining Corp.

Fortuna Mining Corp. is a Canadian precious metals mining company with three operating mines and

exploration activities in Argentina, Côte d’Ivoire, Guinea, Guyana, and Peru, as well as the Diamba

Sud Gold Project located in Senegal. Sustainability is inte gral to all our operations and relationships.

We produce gold and silver and generate shared value over the long-term for our stakeholders through

efficient production, environmental protection, 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.

Investor Relations:

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Forward-Looking Statements

This news release contains forward -looking statements which constitute “forward -looking information” within the

meaning of applicable Canadian securities legislation and “forward-looking statements” within the meaning of the

“safe harbor” provisions of the Private Securities Litigation Reform Act of 1995 (collectively, “forward -looking

statements”). All statements included herein, other than statements of historical fact, are forward -looking

statements, including, without limitation, statements pertaining t o the Company’s sustainability plans, targets,

strategies, and goals, such as working towards a zero harm workplace, implementing the Global Industry Standard

for Tailings Management, and minimizing our environmental footprint . Often, but not always, these forward -

looking statements can be identified by the use of words such as “believe”, “expect”, “anticipate”, “contemplate”,

“target”, “plan”, “goal”, “budget”, “aim”, “intent”, “estimate”, “may”, “should”, “could” , “future” and similar

expressions, including negative variations.

Forward-looking statements involve known and unknown risks, uncertainties and other factors which may cause

the actual results, performance, or achievements of the Company to be materially different from any results,

performance or achievements expressed or implied by the forward-looking statements. Such risks, uncertainties,

and factors include, among others, risks associated with climate change; risks associated with mining regime

changes in the Company’s operating jurisdictions, including those related t o permitting and approvals,

environmental and tailings management, labour, trade relations, and transportation , other factors including

accidents, equipment breakdown, environmental risks; as well as those factors discussed under “Description of

the Business - Risk Factors” in the Company’s Annual Information Form, a copy of which can be found on the

Company’s profile on the SEDAR+ website at www.sedarplus.ca. Although the Company has attempted to

identify important factors that could cause actual actions, events, or results to differ materially from those

described in forward-looking statements, there may be other factors that cause actions, events, or results to differ

from those anticipated, estimated or intended. Forward -looking statements contained herein are based on the

assumptions, beliefs, expectations, and opinions of management, including, but not limited to, continued

availability of water and power resources at the Company’s operations; financial and physical impacts of climate

change and climate change initiatives on markets and the Company’s operations; the availability and effectiveness

of technologies needed to achieve the Company’s sustainabil ity goals and strategies; the accuracy of the

Company’s current mineral resource and reserve estimates; that the Company’s activities will be in accordance

with the Company’s public statements and stated goals; and that there will be no material adverse ch ange

affecting the Company or its properties. Forward -looking statements are made as of the date hereof and the

Company disclaims any obligation to update any forward -looking statements, whether as a result of new

information, future events or results or o therwise, except as required by law. There can be no assurance that

forward-looking statements will prove to be accurate, as actual results and future events could differ materially

from those anticipated in such statements. Accordingly, investors should n ot place undue reliance on forward -

looking statements.

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