ANTIMONY-BASED LIQUID METAL BATTERIES

SUPPORTIVE SHAREHOLDER BASE SHAREHOLDERS* ** CAPITAL STRUCTURE* ✰ Issued & Outstanding 63.2 Million Options 1.67 Million ✰ Share Units 1.38 Million ✰ Fully Diluted 66.25 Million ✰ Estimated Cash Balance* ~$7.1 Million Blackrock B. Riley Krilogy 2.4% 2.9% 2.3% Sun Valley Gold 7.5% Kopernik 8.3% Paulson 39.2% Other public float 37.4% *Capital structure estimate as of September 30, 2023 **Based on most recent shareholder filings Perpetua Resources RESEARCH COVERAGE B. Riley Financial – Lucas Pipes H.C. Wainwright - Heiko Ihle ❖ Cantor Fitzgerald - Mike Kozak ❖ Roth Capital - Mike Niehuser 37

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