Mr. Laurel Sayer reports

PERPETUA RESOURCES PUBLISHES 2021 SUSTAINABILITY REPORT

Perpetua Resources Corp. has released its 2021 sustainability report highlighting the company's key achievements and progress in advancing its environmental, social and governance (ESG) goals. The report, which provides transparent disclosure of material ESG topics, is the company's ninth annual sustainability report and was developed in alignment with the Sustainability Accounting Standards Board (SASB) reporting framework for the metal and mining industry.

"In 2021, Perpetua Resources took significant steps toward fulfilling our commitment to become a responsible mining company," said Laurel Sayer, president and chief executive officer of Perpetua Resources. "We launched a citizen's water monitoring program, entered an antimony supply agreement to support the development of a clean energy storage battery and signed an agreement to start early environmental cleanup actions at site. Our annual sustainability report is an opportunity for our team to reflect on our accomplishments and is a tool to hold us accountable to the commitments we've made to our stakeholders."

Perpetua Resources' 2021 sustainability report provides an in-depth look at the company's achievements over the last year to advance its vision 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.

2021 sustainability report highlights:

• 100-per-cent safe fuel hauls and 118 months with no reportable spills;
• 67-per-cent female executive management and 33-per-cent gender or ethnically diverse board of directors;
• 44 per cent of site operations powered with solar power and first greenhouse gas emission audit;
• 83 community presentations and meetings;
• 73 months with no lost-time incidents;
• Adopted the SASB reporting framework and aligned with the United Nations Sustainable Development Goals;
• Launched an independent citizen water monitoring program;
• Signed an agreement to improve water quality at Stibnite.

"Responsible mining and a more sustainable future go hand in hand," said Mr. Sayer. "Support for mining in America will be influenced by our willingness to be transparent and accountable to our stakeholders, our dedication to positive environmental outcomes, and our ability to maintain the trust of our communities. As an aspiring modern mine developer, Perpetua is committed to robust ESG policies and practices and is continually thinking about how our actions will affect future generations of Idahoans."

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 that are encompassed by the Stibnite gold project. The 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. Further advancing Perpetua Resources' ESG and sustainable mining goals, the project will be powered by the lowest carbon emission grid in the nation and a portion of the antimony produced from the project will be supplied to Ambri, a U.S.-based company commercializing a low-cost liquid metal battery essential for the low-carbon energy transition. In addition to the company's commitments to transparency, accountability, environmental stewardship, safety and community engagement, Perpetua Resources has adopted formal ESG commitments.

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