Ms. Laurel Sayer reports

PERPETUA RESOURCES PUBLISHES 2022 SUSTAINABILITY REPORT

Perpetua Resources Corp. has released its 2022 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 10th 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 vision has always been to use a modern approach to mining, so we can leave the historical Stibnite mining district in better condition than we found it, strengthen our communities and responsibly produce the minerals the world needs," said Laurel Sayer, president and chief executive officer of Perpetua Resources. "I am proud to say we are putting this vision into action. There are many examples of how our team is already living up to this commitment throughout our 2022 sustainability report. Perhaps most notably is the early cleanup work our team began last summer to improve water quality conditions on site."

Perpetua Resources' 2022 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 United States 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.

Two thousand twenty-two sustainability report highlights:

• 130 months with no reportable spills;
• 85 months with no lost time incidents;
• Launched a new community safety feedback program;
• 100 per cent of employees participated in business integrity and compliance-related training;
• 67 per cent women executive management team;
• Began cleanup work on site to pro-actively address legacy water contamination;
• Team members volunteered 1,064 hours in the local community.

"Being open about our environmental, social and governance practices is essential to earn the trust of our communities and stakeholders. Our sustainability report is not only an opportunity for our team to celebrate our progress and accomplishments, but also an important tool for our stakeholders to hold us accountable to our past commitments," said Ms. Sayer. "If we want to build more resilient supply chains, restore the environment and help support the growth of stronger communities, we understand we must continue to communicate transparently and maintain trust with our communities."

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-emissions 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. Perpetua Resources has been awarded a technology investment agreement of up to $24.8-million in Defense Production Act Title III funding to advance construction readiness and permitting of the project. Antimony trisulphide from Stibnite is the only known domestic source of antimony that can meet U.S. defence needs for many small arms, munitions and missile types. In addition to the company's commitments to transparency, accountability, environmental stewardship, safety and community engagement, Perpetua Resources adopted formal ESG commitments.

We seek Safe Harbor.