1.Nature of Operations and Basis of Presentation

Perpetua Resources Corp. (the “Corporation”, and, together with its Subsidiaries, the “Company”, “Perpetua Resources” or “Perpetua”) was incorporated on February 22, 2011 under the Business Corporations Act (British Columbia). The Corporation was organized to hold shares in wholly owned subsidiaries that locate, acquire, develop and restore mineral properties located principally in the Stibnite – Yellow Pine mining district in Valley County, Idaho, USA. The Corporation’s principal asset is 100% ownership in subsidiaries that control the Stibnite Gold Project (the “Project”). The Company currently operates in one segment, which is mineral exploration and development in the United States.

These unaudited condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and include the accounts of Perpetua Resources Corp. and its wholly owned subsidiaries, Perpetua Resources Idaho, Inc. and Idaho Gold Resource Company, LLC. All intercompany transactions, balances, income and expenses have been eliminated. The unaudited condensed consolidated financial statements do not include all disclosures required of annual consolidated financial statements and, accordingly, should be read in conjunction with our annual financial statements for the year ended December 31, 2025.  Certain prior period amounts have been reclassified to be consistent with current period presentation.

In the opinion of the Company, the accompanying unaudited condensed consolidated financial statements contain all adjustments, consisting of only normal recurring adjustments, necessary for a fair statement of the results for the interim periods reported. Operating results for the three months ended March 31, 2026 may not be indicative of results expected for the full year ending December 31, 2026. Management estimates that the Company’s 2026 effective tax rate will be 0% due to the Company’s cumulative loss position, historical net operating losses (“NOLs”), and other available evidence related to the Company’s ability to generate taxable income. Accordingly, there is no income tax provision or benefit for the three months ended March 31, 2026.

The Company’s long-term plan is to generate future profitable operations through the development of the Stibnite Gold Project, which will require additional financing. The Company does not intend to commence full construction on the Project until full financing is in place for construction of the Project. While the Company expects to complete documentation and satisfy the conditions to initial funding of such financing during 2026, if such financing is delayed, the Company has flexibility to defer or delay such expenses until financing is in place. The full financing is expected to include project financing from U.S. EXIM or other sources as well as proceeds from the Company’s 2025 equity offerings.

On March 30, 2026, the board of U.S. EXIM initiated the last formal step before a vote for final approval of an approximately $2.7 billion senior secured loan for the construction and development of the Project by unanimously agreeing to publish a notification to Congress with respect to the proposed loan. The 25-day notice period expired on April 24, 2026. This action by the board of U.S. EXIM does not represent a financing commitment from U.S. EXIM. A funding commitment, if any, is conditional upon the satisfaction of certain conditions, including approval by the U.S. EXIM board and execution of definitive loan documentation. There can be no assurance that the board of U.S. EXIM will approve the proposed loan or that, if approved, the terms or amount of such loan will be the same as those initially indicated or that the proposed loan will be sufficient for us to construct the Project. Perpetua continues to work with U.S. EXIM to advance through the next stages of U.S. EXIM’s due diligence, loan application, and documentation processes. The amount and timing of such funding from U.S. EXIM, if any, is uncertain and subject to conditions outside the Company’s control. The board of U.S. EXIM is expected to make a final decision in the second quarter of 2026 and has included the Company’s loan on the agenda for the May 21, 2026, meeting of the board of U.S. EXIM. The agenda is subject to change by the board of U.S. EXIM at any time, and there can be no assurance that the board will vote to approve the loan at the May 21 meeting, at a different meeting, or at all.

We believe our project financing plans will be successful, although there can be no assurance that the Company will successfully complete all of its contemplated plans because these plans are not entirely within our control as of the date hereof. As such, Perpetua remains open to strategic funding opportunities that support Perpetua’s overall financing and development goals for the Project, which may include the issuance of additional equity, new debt, or project specific debt; government funding; offtake, royalty or streaming arrangements; and/or other financing or strategic opportunities. The future receipt of potential funding from these and/or other means cannot be considered certain at this time. In the event Project funding is not

available in the amounts or at the times anticipated, the Company may defer certain activities to ensure available cash resources are sufficient to satisfy the Company anticipated expenses until such full project financing is in place.

Loss per share

Basic loss per share is computed by dividing the net loss by the weighted average number of shares outstanding during the reporting period. Diluted loss per share is computed similar to basic loss per share except that the weighted average shares outstanding are increased to include additional shares for the assumed exercise of share purchase options and vesting and distribution of awarded share units, if dilutive. The Company’s potential dilutive common shares include outstanding share purchase options, restricted share units (“RSUs”), performance share units (“PSUs”), deferred share units (“DSUs”) and share purchase warrants. Potentially dilutive shares as of March 31, 2026 and 2025, are as follows:

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All potentially dilutive shares were excluded from the calculation of diluted loss per share as their exercise and conversion would be anti-dilutive.