---
schema_version: "secwatch.filing_event.v1"
accession: "0001493152-26-012054"
form_type: "8-K"
ticker: "USGO"
cik: "0001947244"
company_name: "U.S. GoldMining Inc."
filed_at: "2026-03-23T23:59:59+00:00"
generated_at: "2026-05-15T09:24:59.642656+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Whistler PEA shows $2.0B after-tax NPV5%, 33% IRR, 2.1-year payback at base prices

## Summary
- After-tax NPV5% of $2.0B, IRR 33%, initial payback 2.1 years at base prices ($3,200/oz Au, $4.50/lb Cu, $37.50/oz Ag).
- At spot prices ($5,000/oz Au, $5.85/lb Cu, $70/oz Ag), after-tax NPV5% increases to ~$4.9B, IRR 62%, payback 1.2 years.
- Average annual production of 246,000 oz AuEq over 14.6-year mine life; first 3 years 345,000 oz AuEq annually.
- Initial capex of ~$1.3B (incl. 20% contingency), LOM AISC $1,046/oz Au (by-product basis).
- PEA considers only one of three deposits; exploration potential for additional targets.

## SEC filing metadata
- accession: 0001493152-26-012054
- form_type: 8-K
- ticker: USGO
- cik: 0001947244
- company_name: U.S. GoldMining Inc.
- filed_at: 2026-03-23T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1947244/000149315226012054/0001493152-26-012054-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1947244/000149315226012054/form8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001493152-26-012054
- JSON: https://secwatch.observer/filing/0001493152-26-012054.json
- Plain text: https://secwatch.observer/filing/0001493152-26-012054.txt

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