Perpetua Resources Publishes 2024 Sustainability Report

BOISE, Idaho, June 26, 2025 /PRNewswire/ - Perpetua Resources Corp. (Nasdaq: PPTA) (TSX: PPTA) ("Perpetua Resources" or "Perpetua" or the "Company") released its 2024 Sustainability Report highlighting the Company's key achievements and progress in advancing its environmental, social and governance ("ESG") goals. The report, which is the Company's 12th annual sustainability report, provides disclosure of ESG topics and aligns with the Sustainability Accounting Standards Board ("SASB") reporting framework for the Metals and Mining Industry.

"This year's sustainability report chronicles a period of significant progress for the Company, guided by our dedication to responsible stewardship and investment in the region we're proud to call home," said Jon Cherry, Perpetua Resources President and CEO. "A highlight of this past year was receiving our Final Environmental Impact Statement ("FEIS") and a Draft Record of Decision ("ROD") in September 2024, followed by receipt of a Final ROD in January 2025. These achievements propel us ever closer to bringing this important project online, allowing us to secure critical minerals for America's national security and provide much-needed environmental reclamation to the historical Stibnite Mining District."

2024 Sustainability Report Highlights:

• 154 months (12+ years) with no reportable spills
• 109 months with no lost time incidents
• 100 percent of employees participated in business integrity and compliance related training
• Spent $19 million in legacy cleanup activities to improve water quality at site since 2021
• Team members spent 1,204 hours serving the community
• Spent $23.6 million in Idaho in 2024; more than $132 million since 2014

Perpetua Resources' 2024 Sustainability Report provides an in-depth look at the Company's sustainability achievements over the last year, as well as the Company's efforts to provide the U.S. with a domestic source of the critical mineral antimony, develop one of the largest and highest-grade open pit gold mines in the country, and restore an abandoned brownfield site.

About Perpetua Resources and the Stibnite Gold Project
Perpetua Resources Corp., through its wholly owned subsidiaries, is focused on the exploration, site restoration and redevelopment of gold-antimony-silver deposits in the Stibnite-Yellow Pine district of central Idaho that are encompassed by the Stibnite Gold Project. The Stibnite Gold Project is one of the highest-grade, open pit gold deposits in the United States and is designed to apply a modern, responsible mining approach to restore an abandoned mine site and produce both gold and the only mined source of antimony in the United States. Antimony trisulfide from Stibnite is the only known domestic reserves of antimony that can meet U.S. defense needs for many small arms, munitions, and missile types.

FORWARD-LOOKING INFORMATION
Statements contained in this news release that are not historical facts are "forward-looking information" or "forward-looking statements" (collectively, "Forward-Looking Information") within the meaning of applicable Canadian securities legislation and the United States Private Securities Litigation Reform Act of 1995. Forward-Looking Information includes, but is not limited to, disclosure regarding expected benefits from the Project, including providing a domestic source of antimony, national defense benefits and environmental benefits. In certain cases, Forward-Looking Information can be identified by the use of words and phrases or variations of such words and phrases or statements such as "anticipate", "expect", "plan", "likely", "believe", "intend", "forecast", "project", "estimate", "potential", "could", "may", "will", "would" or "should".. Forward-Looking Information in this news release are based on certain material assumptions and involve, known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Perpetua Resources to be materially different from any future results, performance or achievements expressed or implied by the Forward-Looking Information. Such risks and other factors include those factors discussed in Perpetua Resources' public filings with the U.S. Securities and Exchange Commission (the "SEC") and its Canadian disclosure record. Although Perpetua Resources has attempted to identify important factors that could affect Perpetua Resources and may cause actual actions, events or results to differ materially from those described in Forward-Looking Information, there may be other factors that cause actions, events or results not to be as anticipated, estimated or intended. There can be no assurance that Forward-Looking Information will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on Forward-Looking Information. For further information on these and other risks and uncertainties that may affect the Company's business, see the "Risk Factors" and "Management's Discussion and Analysis of Financial Condition and Results of Operations" sections of the Company's filings with the SEC, including Perpetua's Annual Report on Form 10-K filed with the SEC on March 19, 2025, which are available at www.sec.gov and with the Canadian securities regulators, which are available at www.sedarplus.com. Except as required by law, Perpetua Resources does not assume any obligation to release publicly any revisions to Forward-Looking Information contained in this news release to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated events.

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SOURCE Perpetua Resources Corp.