Investor Presentaiton

VALUATION EXPECTED TO RE-RATE ONCE PERMITTED Market Cap As % of Spot NAV³,4 50% 25% 0% 13% 32% 29% 42% 42% 40% Perpetua¹² Marathon Skeena Ascot Artemis NovaGold 1. Perpetua Resources market cap based on fully diluted market cap using closing price as of October 24, 2023 (US$3.57 share price and fully diluted shares of 66 million) 2. Based on the 2020 Feasibility Study (FS) which is intended to be read as a whole and sections should not be read or relied upon out of context. The information in this presentation is subject to the assumptions, exclusions and qualifications contained in the FS. See "Regulatory Information" at the end of this presentation. For a summary of differences between the FS and TRS, see "Cautionary Note and Technical Disclosure" at the beginning of this presentation. 3. NAV's based on after-tax NPV (5% discount rate) based on last available NAV within $1,850/oz gold price. 4. Market Caps based on October 24, 2023 closing stock prices. 19

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