Mr. Marcelo Kim reports

PERPETUA RESOURCES ANNOUNCES WEBINAR TO PROVIDE UPDATE ON SUCCESSFUL FINANCING AND NEXT STEPS TO UNLOCK VALUE AT THE STIBNITE GOLD PROJECT

Following the recent closing of Perpetua Resources Corp.'s registered offering and private placement of common shares, it will host a webinar on Wednesday, June 18, 2025, at 9:30 a.m. Mountain Time (11:30 a.m. Eastern Time).

The webinar will feature John Paulson, Perpetua Resources' largest shareholder, alongside the company's chairman, Marcelo Kim, and members of the executive and project execution team to provide an overview of the recent financing and to discuss the company's go-forward plans to develop the Stibnite gold project. The presentation will be followed by a question-and-answer session. Access to the webinar may be conducted via telephone through the dial-in information provided below.

"Following the successful closing of the offering and the private placement as part of a comprehensive financing package for the development of the project, and in connection with the company's previously announced application for up to $2-billion (U.S.) in project financing submitted to the Export-Import Bank of the United States in May, 2025, Perpetua Resources is well positioned to move forward with a deep bench of experienced leaders," said Jon Cherry, Perpetua chief executive officer. "With federal permits issued and a clear financing solution outlined and well advanced, we believe Perpetua Resources can unlock significant value developing the world class Stibnite gold project."

Webinar details:

Title:  Perpetua Resources Unlocking the Stibnite Gold Project

Date:  Wednesday, June 18, 2025

Time:  9:30 a.m. MT/11:30 a.m. ET

Dial-in number:  1-253-205-0468

Meeting ID:  810 9272 7871

Pass code:  129646

In addition to the live webinar, the webinar presentation will be available on Perpetua's website under the webinars and events tab.

About Perpetua Resources Corp. and the Stibnite gold project

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 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 trisulphide from Stibnite is the only known domestic reserves of antimony that can meet United States defence needs for many small arms, munitions and missile types.

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