---
schema_version: "secwatch.filing_event.v1"
accession: "0000783324-25-000051"
form_type: "8-K"
ticker: "VGZ"
cik: "0000783324"
company_name: "VISTA GOLD CORP"
filed_at: "2025-09-11T23:59:59+00:00"
generated_at: "2026-05-17T06:56:25.664617+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Vista Gold reports Mt Todd FS: after-tax NPV $1.06B, IRR 27.8%, initial capex $425M

## Summary
- Initial capital $425M, 59% reduction from prior 50ktpd FS; capital efficiency $93/oz.
- Proven & Probable Reserves: 5.2M oz gold (172M tonnes at 0.94 g/t) at $1,800/oz gold price.
- After-tax NPV5% $1.06B and IRR 27.8% at $2,500/oz gold; payback period 2.7 years.
- Average annual production: 153k oz years 1-15, 146k oz LOM; AISC $1,449/oz years 1-15.
- Mineral Resources (excl. reserves): Measured & Indicated 3.9M oz, Inferred 1.4M oz.

## SEC filing metadata
- accession: 0000783324-25-000051
- form_type: 8-K
- ticker: VGZ
- cik: 0000783324
- company_name: VISTA GOLD CORP
- filed_at: 2025-09-11T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/783324/000078332425000051/0000783324-25-000051-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/783324/000078332425000051/vgz-20250911x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000783324-25-000051
- JSON: https://secwatch.observer/filing/0000783324-25-000051.json
- Plain text: https://secwatch.observer/filing/0000783324-25-000051.txt

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