Mr. Jon Cherry reports

PERPETUA RESOURCES PUBLISHES 2025 SUSTAINABILITY REPORT

Perpetua Resources Corp. has released its 2025 sustainability report, highlighting the company's key achievements and progress in advancing its environmental, social and governance (ESG) goals. The 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.

"Our 2025 sustainability report reflects a milestone year for Perpetua Resources," said Jon Cherry, president and chief executive officer of Perpetua Resources. "After years of environmental review, stakeholder engagement and technical development, we secured our final federal permits and began early works construction activities at the Stibnite gold project. Reaching this point was made possible by a long-standing commitment to safety, responsible development and meaningful partnership with our stakeholders. As we move into construction, our sustainability commitments are more important than ever. They will continue to guide our work as we help supply the critical minerals America needs, restore a historic mining district and create lasting benefits for local communities."

2025 sustainability report highlights:

• 166 months (13-plus years) with no reportable spills;
• 121 months (10-plus years) with no lost-time incidents;
• 100 per cent of employees participated in business integrity and compliance related training;
• Provided 590 hours of volunteer service to the community;
• Finalized a cultural monitoring agreement with the Shoshone Paiute Tribes;
• Posted approximately $159.6-million in construction phase financial assurance;
• Contributed $63.4-million to Idaho's economy in 2025;
• Completed $19-million-plus in legacy cleanup to improve water quality at site since 2021;
• Fulfilled $450,000 milestone payment to the Stibnite Foundation and 150,000 company shares representing $3.75-million at a share value of $25 per share;
• Established a $250,000 Stibnite Launch Scholarship Fund with the College of Western Idaho.

Perpetua's 2025 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 mine site.

About Perpetua Resources Corp.

Perpetua Resources, 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. The Stibnite gold project is one of the highest-grade, open-pit gold deposits in the United States and holds the only identified domestic reserve of the critical mineral antimony, which is essential to the defence, energy and manufacturing sectors. The project is designed to apply a modern, responsible mining approach to restore an abandoned mine site and provide uplift to water quality, improve fish habitat access, and invest in river restoration while supporting local economic development in rural Idaho.

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