X0508 4 2026-01-05 0 0001526243 PERPETUA RESOURCES CORP. PPTA 0001902352 Lyon Mckinsey Margaret 405 S. 8TH STREET, STE 201 BOISE ID 83702 0 1 0 0 (See remarks (4)) 0 Common Shares 2026-01-05 4 X 0 40000 8.59 A 129154 D Common Shares 2026-01-05 4 S 0 32490 26.61 D 96664 D Director and Employee Stock Option (right to buy) 8.59 2026-01-05 4 X 0 40000 0 D 2026-01-20 Common Shares 40000 0 D The exercise price of the stock option of CAD $11.80 is converted to USD based on the daily average exchange rate as reported by the H.10 statistical release of the Board of Governances of the Federal Reserve System on January 2, 2026, of C$1.3738 = US$1.00. The sale price of the stock option of CAD $36.56 is converted to USD based on the daily average exchange rate as reported by the H.10 statistical release of the Board of Governances of the Federal Reserve System on January 2, 2026, of C$1.3738 = US$1.00. The sale price of CAD $36.56 is a weighted average price. These shares were sold in multiple transactions at prices ranging from CAD $36.38 to CAD $36.65, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Common Shares sold at each separate price within the range set forth in this footnote (2). These shares include shares sold to cover option exercise price. The stock option, representing a right to purchase a total of 40,000 Common Shares, became exercisable as to 10,000 Common Shares on January 20, 2021, as to 10,000 Common Shares on January 20, 2022, as to 10,000 Common Shares on January 20, 2023, and as to the remaining 10,000 on January 20, 2024. 4. Senior Vice President, External Affairs at Perpetua Resources Idaho, Inc., a wholly owned subsidiary of Perpetua Resources Corp. /s/ Tanya Nelson, as attorney-in-fact for Mckinsey Margaret Lyon 2026-01-07