Investor Presentaiton

Sustainability De-risks Trevali for future growth ACHIEVEMENTS 30% reduction in Total Recordable Injury Frequency in 2020 Compared to 2019 1st Task Force on Climate-Related Financial Disclosures Reporting Completed in 2019 Independent Tailings Assurance Reviews Completed in 2019 at all four Trevali mines across eight TSF's, confirming stability Trigger, Action, Response Plans at Perkoa, Burkina Faso. Security personnel trained in the UN Voluntary Principles TARGETS 25% Absolute Reduction in Greenhouse Gas Emissions by 2025 2018 Baseline - 131,809t CO2e • 30% of Senior Leadership Roles to be Occupied by Women 2019 Baseline: 20% executive and 15% other senior leadership 11.4% Reduction in Clean Water Made Dirty by 2025 2% year-on-year reduction from a 2019 baseline TREVALI Note: More information can be found in the Trevali Annual Sustainability Report - 2019 published on May 28, 2020. 11

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