---
schema_version: "secwatch.filing_event.v1"
accession: "0001654954-25-004885"
form_type: "8-K"
ticker: "UAMY"
cik: "0000101538"
company_name: "UNITED STATES ANTIMONY CORP"
filed_at: "2025-04-30T23:59:59+00:00"
generated_at: "2026-05-23T01:49:16.157495+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# US Antimony signs WSP for smelter expansion; capacity to rise six fold to 300+ tons/month by year-end 2025

## Summary
- Total capex <$15M; capacity to >300 short tons/month (six times current) by end of 2025.
- WSP USA Inc. contracted for engineering and construction services for Thompson Falls, MT smelter.
- Existing smelting operations will not be impeded during the expansion project.
- Madero Smelter in Mexico restarted one week ago; targeting combined 500 tons/month by year-end.
- Chairman cites national security supply chain importance for the aggressive schedule.

## SEC filing metadata
- accession: 0001654954-25-004885
- form_type: 8-K
- ticker: UAMY
- cik: 0000101538
- company_name: UNITED STATES ANTIMONY CORP
- filed_at: 2025-04-30T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/101538/000165495425004885/0001654954-25-004885-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/101538/000165495425004885/uamy_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001654954-25-004885
- JSON: https://secwatch.observer/filing/0001654954-25-004885.json
- Plain text: https://secwatch.observer/filing/0001654954-25-004885.txt

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