Perpetua Resources starts construction on Stibnite Gold Project after posting $139M surety bond

PERPETUA RESOURCES CORP.

Posted $139M surety bond with Endurance Assurance for construction-phase reclamation; annual premium 1.5% of penal sum.
Obtained $35M standby letter of credit from Bank of Nova Scotia, secured by $40.5M cash deposit, under a $39.5M credit facility.
Also posted $4.2M letter of credit with USACE for Clean Water Act Section 404 off-site mitigation.
Received USFS and IDL notices to proceed; early works construction began October 21, 2025.
Indemnity agreement requires minimum $200M in collateral/cash/marketable securities; contingent liability up to $139M plus costs.

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