Perpetua Resources Commences Additional Critical Path Construction Activities For Its Stibnite Gold Project For 2026 Field Season

Perpetua Resources Corp. (Nasdaq: PPTA) (TSX: PPTA) ("Perpetua Resources" or the "Company") announced today that the Stibnite Gold Project ("Project") continues to advance previously planned critical path construction and infrastructure activities following the May 29 decision by the United States District Court of Idaho denying the Project opponents' motion for a preliminary injunction related to a lawsuit filed in 2025 by special interest groups. In the decision, the Court found that the Plaintiffs failed to show that the planned activities would cause the Plaintiffs irreparable harm. 

On Saturday, May 30, Perpetua commenced additional critical path construction activities for the 2026 field season, including initial work associated with the Burntlog Route, a key infrastructure project designed to support safe and efficient access to the Project site while minimizing impacts to nearby communities and sensitive environmental areas. These road upgrades will continue in parallel with additional planned construction of on-site worker housing facilities, selected powerline upgrades, and approved exploration and geotechnical drilling. This new activity builds upon the early works construction Perpetua began in October 2025 and is focused on maintaining construction schedule for 2029 operations and delivery of urgently needed antimony to the United States military.