---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-013048"
form_type: "8-K"
ticker: "PPTA"
cik: "0001526243"
company_name: "PERPETUA RESOURCES CORP."
filed_at: "2025-02-13T23:59:59+00:00"
generated_at: "2026-05-26T22:14:43.811433+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Perpetua Resources updates Stibnite Gold Project economics: $1.4B NPV, $90.2M Idaho Power deal

## Summary
- Updated model shows $1.4B after-tax NPV (5%) and 15.4% IRR at consensus gold $2,100/oz; at spot $2,900/oz, NPV $3.7B with 27.1% IRR.
- AISC averages $435/oz first 4 years, under $760/oz LOM; project positioned as lowest-cost gold project in US, Canada, Australia.
- Over 15% increase in projected job-years may support increase to existing $1.8B EXIM letter of interest.
- Agreement with Idaho Power to procure long lead equipment with estimated cost $90.2M; initial $18.8M payment due.
- Initial capital estimate increased to $2.215B from $1.263B in 2020 FS, driven by inflation, power line upgrades, and oxygen plant buy-and-build.

## SEC filing metadata
- accession: 0001104659-25-013048
- form_type: 8-K
- ticker: PPTA
- cik: 0001526243
- company_name: PERPETUA RESOURCES CORP.
- filed_at: 2025-02-13T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.85
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1526243/000110465925013048/0001104659-25-013048-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1526243/000110465925013048/tm256434d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-013048
- JSON: https://secwatch.observer/filing/0001104659-25-013048.json
- Plain text: https://secwatch.observer/filing/0001104659-25-013048.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.