PPTA

A deferred share unit ("DSU") entitles the holder to receive one common share of Perpetua Resources Corp. (the "Issuer") (or, at the election of the holder and subject to the approval of the administrator of the Issuer's Omnibus Equity Incentive Plan, cash equal to the value thereof on the date of settlement) for each DSU. The Reporting Person elected to receive DSUs in lieu of a cash retainer for his service during the second quarter of 2026. The DSUs are fully vested as of the date of grant and will be settled following the reporting person's separation from service.

Based on the closing price of the Issuer's Common Shares on the Nasdaq Capital Market on June 24, 2026.

A deferred share unit ("DSU") entitles the holder to receive one common share of Perpetua Resources Corp. (the "Issuer") (or, at the election of the holder and subject to the approval of the administrator of the Issuer's Omnibus Equity Incentive Plan, cash equal to the value thereof on the date of settlement) for each DSU. The Reporting Person elected to receive DSUs in lieu of a cash retainer for his service during the second quarter of 2026. The DSUs are fully vested as of the date of grant and will be settled following the reporting person's separation from service.

Based on the closing price of the Issuer's Common Shares on the Nasdaq Capital Market on June 24, 2026.

A deferred share unit ("DSU") entitles the holder to receive one common share of Perpetua Resources Corp. (the "Issuer") (or, at the election of the holder and subject to the approval of the administrator of the Issuer's Omnibus Equity Incentive Plan, cash equal to the value thereof on the date of settlement) for each DSU. The Reporting Person elected to receive DSUs in lieu of a cash retainer for his service during the second quarter of 2026. The DSUs are fully vested as of the date of grant and will be settled following the reporting person's separation from service.

Based on the closing price of the Issuer's Common Shares on the Nasdaq Capital Market on June 24, 2026.

A deferred share unit ("DSU") entitles the holder to receive one common share of Perpetua Resources Corp. (the "Issuer") (or, at the election of the holder and subject to the approval of the administrator of the Issuer's Omnibus Equity Incentive Plan, cash equal to the value thereof on the date of settlement) for each DSU. The Reporting Person elected to receive DSUs in lieu of a cash retainer for his service during the second quarter of 2026. The DSUs are fully vested as of the date of grant and will be settled following the reporting person's separation from service.

Based on the closing price of the Issuer's Common Shares on the Nasdaq Capital Market on June 24, 2026.

A deferred share unit ("DSU") entitles the holder to receive one common share of Perpetua Resources Corp. (the "Issuer") (or, at the election of the holder and subject to the approval of the administrator of the Issuer's Omnibus Equity Incentive Plan, cash equal to the value thereof on the date of settlement) for each DSU. The Reporting Person elected to receive DSUs in lieu of a cash retainer for his service during the second quarter of 2026. The DSUs are fully vested as of the date of grant and will be settled following the reporting person's separation from service.

Based on the closing price of the Issuer's Common Shares on the Nasdaq Capital Market on June 24, 2026.

The sale reported on this Form 4 represents shares sold by the Reporting Person to cover tax withholding obligations in connection with the settlement of Restricted Share Units, which vested on February 16, 2026, and were settled in Common Shares of the Issuer following the end of the Issuer's blackout period on April 1, 2026.

The sale price included on this Form 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from US$29.58 to US$29.76, 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 ranges set forth in this footnote (2).

The sale reported on this Form 4 represents shares sold by the Reporting Person to cover tax withholding obligations in connection with the settlement of Restricted Share Units, which vested on February 21, 2026, and were settled in Common Shares of the Issuer following the end of the Issuer's blackout period on April 1, 2026.

The sale price included on this Form 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from US$29.28 to US$29.44, 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 ranges set forth in this footnote (2).

The sale reported on this Form 4 represents shares sold by the Reporting Person to cover tax withholding obligations in connection with the settlement of Restricted Share Units, which vested on February 21, 2026, and were settled in Common Shares of the Issuer following the end of the Issuer's blackout period on April 1, 2026.

The sale price included on this Form 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from US$29.28 to US$29.44, 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 ranges set forth in this footnote (4).

A deferred share unit ("DSU") entitles the holder to receive one common share of Perpetua Resources Corp. (the "Issuer") (or, at the election of the holder and subject to the approval of the administrator of the Issuer's Omnibus Equity Incentive Plan, cash equal to the value thereof on the date of settlement) for each DSU. The Reporting Person elected to receive DSUs in lieu of a cash retainer for his service during the first quarter of 2026. The DSUs are fully vested as of the date of grant and will be settled following the reporting person's separation from service.

Based on the closing price of the Issuer's Common Shares on the Nasdaq Capital Market on March 24, 2026.

A deferred share unit ("DSU") entitles the holder to receive one common share of Perpetua Resources Corp. (the "Issuer") (or, at the election of the holder and subject to the approval of the administrator of the Issuer's Omnibus Equity Incentive Plan, cash equal to the value thereof on the date of settlement) for each DSU. The Reporting Person elected to receive DSUs in lieu of a cash retainer for his service during the first quarter of 2026. The DSUs are fully vested as of the date of grant and will be settled following the reporting person's separation from service.

Based on the closing price of the Issuer's Common Shares on the Nasdaq Capital Market on March 24, 2026.

A deferred share unit ("DSU") entitles the holder to receive one common share of Perpetua Resources Corp. (the "Issuer") (or, at the election of the holder and subject to the approval of the administrator of the Issuer's Omnibus Equity Incentive Plan, cash equal to the value thereof on the date of settlement) for each DSU. The Reporting Person elected to receive DSUs in lieu of a cash retainer for his service during the first quarter of 2026. The DSUs are fully vested as of the date of grant and will be settled following the reporting person's separation from service.

Based on the closing price of the Issuer's Common Shares on the Nasdaq Capital Market on March 24, 2026.

A deferred share unit ("DSU") entitles the holder to receive one common share of Perpetua Resources Corp. (the "Issuer") (or, at the election of the holder and subject to the approval of the administrator of the Issuer's Omnibus Equity Incentive Plan, cash equal to the value thereof on the date of settlement) for each DSU. The Reporting Person elected to receive DSUs in lieu of a cash retainer for his service during the first quarter of 2026. The DSUs are fully vested as of the date of grant and will be settled following the reporting person's separation from service.

Based on the closing price of the Issuer's Common Shares on the Nasdaq Capital Market on March 24, 2026.

A deferred share unit ("DSU") entitles the holder to receive one common share of Perpetua Resources Corp. (the "Issuer") (or, at the election of the holder and subject to the approval of the administrator of the Issuer's Omnibus Equity Incentive Plan, cash equal to the value thereof on the date of settlement) for each DSU. The Reporting Person elected to receive DSUs in lieu of a cash retainer for his service during the first quarter of 2026. The DSUs are fully vested as of the date of grant and will be settled following the reporting person's separation from service.

Based on the closing price of the Issuer's Common Shares on the Nasdaq Capital Market on March 24, 2026.

A restricted share unit ("RSU") entitles the holder to receive one Common Share (or cash equal to the value thereof) for each vested RSU, as elected by the reporting person subject to the approval of the administrator of the Issuer's Omnibus Equity Incentive Plan.

On March 16, 2026, the reporting person was granted 8,197 RSUs, which vest in three equal installments as follows: 2,732 on February 16, 2027, 2,733 on February 16, 2028, and 2,732 on February 16, 2029, subject to the terms and conditions of the Perpetua Resources Corp. Omnibus Equity Incentive Plan.

A restricted share unit ("RSU") entitles the holder to receive one Common Share (or cash equal to the value thereof) for each vested RSU. The RSUs that vested on February 21, 2026 were settled in Common Shares of the Issuer.

On February 21, 2025, the reporting person was granted 15,847 RSUs, which vest ratably on each of the first three anniversaries of the grant date, subject to the terms and conditions of the Perpetua Resources Corp. Omnibus Equity Incentive Plan.

A restricted share unit ("RSU") entitles the holder to receive one Common Share (or cash equal to the value thereof) for each vested RSU. The RSUs that vested on February 21, 2026 were settled in Common Shares of the Issuer.

On February 21, 2025, the reporting person was granted 38,174 RSUs, which vest ratably on each of the first three anniversaries of the grant date, subject to the terms and conditions of the Perpetua Resources Corp. Omnibus Equity Incentive Plan.

A restricted share unit ("RSU") entitles the holder to receive one Common Share (or cash equal to the value thereof) for each vested RSU. The RSUs that vested on February 16, 2026 were settled in Common Shares of the Issuer.

On February 16, 2024, the reporting person was granted 40,910 RSUs, which vest ratably on each of the first three anniversaries of the grant date, subject to the terms and conditions of the Perpetua Resources Corp. Omnibus Equity Incentive Plan.

A restricted share unit ("RSU") entitles the holder to receive one Common Share (or cash equal to the value thereof) for each vested RSU. The RSUs that vested on February 16, 2026 were settled in Common Shares of the Issuer.

The sale reported on this Form 4 represents shares sold by the Reporting Person to cover tax withholding obligations in connection with the settlement of Restricted Share Units, which vested on February 10, 2026, and were settled in Common Shares of the Issuer.

The sale price included on this Form 4 is a weighted average price and 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 February 6, 2026, of C$1.3644 = US$1.00. These shares were sold in multiple transactions at prices ranging from US$27.40 to US$27.69, 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 ranges set forth in this footnote (2).

The sale reported on this Form 4 represents shares sold by the Reporting Person to cover tax withholding obligations in connection with the settlement of Performance Share Units, which vested on February 11, 2026, when certification of the applicable performance measures occurred, and were settled in Common Shares of the Issuer following such certification.

The sale price included on this Form 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from US$27.39 to US$27.93, 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 ranges set forth in this footnote (4).

A restricted share unit ("RSU") entitles the holder to receive one Common Share (or cash equal to the value thereof) for each vested RSU. The RSUs will vest ratably on February 16, 2027, 2028 and 2029, subject to the terms and conditions of the Perpetua Resources Corp. Omnibus Equity Incentive Plan.

A deferred share unit ("DSU") entitles the holder to receive one common share of Perpetua Resources Corp. (the "Issuer") (or, at the election of the holder and subject to the approval of the administrator of the Issuer's Omnibus Equity Incentive Plan, cash equal to the value thereof on the date of settlement) for each DSU. The DSUs are fully vested as of the date of grant and will be settled following the reporting person's separation from service.

Based on the closing price of the Issuer's Common Shares on the Nasdaq Capital Market on February 11, 2026.

A deferred share unit ("DSU") entitles the holder to receive one common share of Perpetua Resources Corp. (the "Issuer") (or, at the election of the holder and subject to the approval of the administrator of the Issuer's Omnibus Equity Incentive Plan, cash equal to the value thereof on the date of settlement) for each DSU. The DSUs are fully vested as of the date of grant and will be settled following the reporting person's separation from service.

Based on the closing price of the Issuer's Common Shares on the Nasdaq Capital Market on February 11, 2026.

A deferred share unit ("DSU") entitles the holder to receive one common share of Perpetua Resources Corp. (the "Issuer") (or, at the election of the holder and subject to the approval of the administrator of the Issuer's Omnibus Equity Incentive Plan, cash equal to the value thereof on the date of settlement) for each DSU. The DSUs are fully vested as of the date of grant and will be settled following the reporting person's separation from service.

Based on the closing price of the Issuer's Common Shares on the Nasdaq Capital Market on February 11, 2026.

A deferred share unit ("DSU") entitles the holder to receive one common share of Perpetua Resources Corp. (the "Issuer") (or, at the election of the holder and subject to the approval of the administrator of the Issuer's Omnibus Equity Incentive Plan, cash equal to the value thereof on the date of settlement) for each DSU. The DSUs are fully vested as of the date of grant and will be settled following the reporting person's separation from service.

Based on the closing price of the Issuer's Common Shares on the Nasdaq Capital Market on February 11, 2026.

A restricted share unit ("RSU") entitles the holder to receive one Common Share (or cash equal to the value thereof) for each vested RSU. The RSUs will vest ratably on February 16, 2027, 2028 and 2029, subject to the terms and conditions of the Perpetua Resources Corp. Omnibus Equity Incentive Plan.

A restricted share unit ("RSU") entitles the holder to receive one Common Share (or cash equal to the value thereof) for each vested RSU. The RSUs will vest ratably on February 16, 2027, 2028 and 2029, subject to the terms and conditions of the Perpetua Resources Corp. Omnibus Equity Incentive Plan.

A restricted share unit ("RSU") entitles the holder to receive one Common Share (or cash equal to the value thereof) for each vested RSU. The RSUs will vest ratably on February 16, 2027, 2028 and 2029, subject to the terms and conditions of the Perpetua Resources Corp. Omnibus Equity Incentive Plan.

A restricted share unit ("RSU") entitles the holder to receive one Common Share (or cash equal to the value thereof) for each vested RSU. The RSUs will vest ratably on February 16, 2027, 2028 and 2029, subject to the terms and conditions of the Perpetua Resources Corp. Omnibus Equity Incentive Plan.

A deferred share unit ("DSU") entitles the holder to receive one common share of Perpetua Resources Corp. (the "Issuer") (or, at the election of the holder and subject to the approval of the administrator of the Issuer's Omnibus Equity Incentive Plan, cash equal to the value thereof on the date of settlement) for each DSU. The DSUs are fully vested as of the date of grant and will be settled following the reporting person's separation from service.

Based on the closing price of the Issuer's Common Shares on the Nasdaq Capital Market on February 11, 2026.

A deferred share unit ("DSU") entitles the holder to receive one common share of Perpetua Resources Corp. (the "Issuer") (or, at the election of the holder and subject to the approval of the administrator of the Issuer's Omnibus Equity Incentive Plan, cash equal to the value thereof on the date of settlement) for each DSU. The DSUs are fully vested as of the date of grant and will be settled following the reporting person's separation from service.

Based on the closing price of the Issuer's Common Shares on the Nasdaq Capital Market on February 11, 2026.

A deferred share unit ("DSU") entitles the holder to receive one common share of Perpetua Resources Corp. (the "Issuer") (or, at the election of the holder and subject to the approval of the administrator of the Issuer's Omnibus Equity Incentive Plan, cash equal to the value thereof on the date of settlement) for each DSU. The DSUs are fully vested as of the date of grant and will be settled following the reporting person's separation from service.

Based on the closing price of the Issuer's Common Shares on the Nasdaq Capital Market on February 11, 2026.

A restricted share unit ("RSU") entitles the holder to receive one Common Share (or cash equal to the value thereof) for each vested RSU. The RSUs that vested on February 10, 2026 were settled in Common Shares of the Issuer.

A restricted share unit ("RSU") entitles the holder to receive one Common Share (or cash equal to the value thereof) for each vested RSU. The RSUs that vested on February 10, 2026 were settled in Common Shares of the Issuer.

On February 10, 2023, the reporting person was granted 33,929 RSUs, which vest ratably on each of the first three anniversaries of the grant date, subject to the terms and conditions of the Perpetua Resources Corp. Omnibus Equity Incentive Plan.

The sale price of the stock option of CAD $39.96 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 $39.96 is a weighted average price. These shares were sold in multiple transactions at prices ranging from CAD $39.96 to CAD $39.97, 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 (3). These shares represent shares sold to cover payment of taxes relating to the option exercise.

The sale price of the stock option of CAD $36.50 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 $36.50 is a weighted average price. These shares were sold in multiple transactions at prices ranging from CAD $36.41 to CAD $36.71, 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 (3). These shares represent shares sold to cover payment of taxes relating to the option exercise.

The sale price of the stock option of CAD $37.29 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 $37.29 is a weighted average price. These shares were sold in multiple transactions at prices ranging from CAD $37.26 to CAD $37.32, 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 (3). These shares represent shares sold to cover payment of taxes relating to the option exercise.

The sale price of the stock option of CAD $36.50 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 $36.50 is a weighted average price. These shares were sold in multiple transactions at prices ranging from CAD $36.41 to CAD $36.81, 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 (3). These shares represent shares sold to cover payment of taxes relating to the option exercise.

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 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.

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 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 stock option, representing a right to purchase a total of 20,000 Common Shares, became exercisable as to 5,000 Common Shares on January 20, 2021, as to 5,000 Common Shares on January 20, 2022, as to 5,000 Common Shares on January 20, 2023, and as to the remaining 5,000 on January 20, 2024.

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 stock option, representing a right to purchase a total of 9,500 Common Shares, became exercisable as to 2,375 Common Shares on January 20, 2021, as to 2,375 Common Shares on January 20, 2022, as to 2,375 Common Shares on January 20, 2023, and as to the remaining 2,375 on January 20, 2024.

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 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 stock option, representing a right to purchase a total of 9,500 Common Shares, became exercisable as to 2,375 Common Shares on January 20, 2021, as to 2,375 Common Shares on January 20, 2022, as to 2,375 Common Shares on January 20, 2023, and as to the remaining 2,375 on January 20, 2024.

The sale price of the stock option of CAD $36.18 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 $36.18 is a weighted average price. These shares were sold in multiple transactions at prices ranging from CAD $36.05 to CAD $36.31, 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 represent shares sold to cover option exercise price.

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 stock option, representing a right to purchase a total of 9,500 Common Shares, became exercisable as to 2,375 Common Shares on January 20, 2021, as to 2,375 Common Shares on January 20, 2022, as to 2,375 Common Shares on January 20, 2023, and as to the remaining 2,375 on January 20, 2024.