---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-106690"
form_type: "8-K"
ticker: "AUMN"
cik: "0001011509"
company_name: "Golden Minerals Co"
filed_at: "2026-09-10T19:43:26+00:00"
generated_at: "2026-09-10T19:44:05.410798+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Golden Minerals CEO Castanos resigns; Watkins named CEO; Argentine project update

## Summary
- Pablo Castanos resigns as President/CEO effective Sept 30, 2026, to pursue another opportunity; remains a director.
- Board appoints David Watkins, director since 2009, as President/CEO effective Sept 30, 2026; no employment agreement yet.
- Cascadero Copper agreed to sell Argentine interests (Sarita Este, Desierto) to Lumina Copper, a First Quantum affiliate.
- Golden plans first-stage drill program at Desierto to test deep mineralization near First Quantum's Taca Taca project; details expected later in September.

## SEC filing metadata
- accession: 0001104659-26-106690
- form_type: 8-K
- ticker: AUMN
- cik: 0001011509
- company_name: Golden Minerals Co
- filed_at: 2026-09-10T19:43:26+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1011509/000110465926106690/0001104659-26-106690-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1011509/000110465926106690/tm2625163d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-106690
- JSON: https://secwatch.observer/filing/0001104659-26-106690.json
- Plain text: https://secwatch.observer/filing/0001104659-26-106690.txt

## Key facts
- Executive change
  Pablo Castanos resigned as President and Chief Executive Officer at Golden Minerals Co.
  - Action: resigned
  - Role: President and Chief Executive Officer
  source text: Pablo Castanos notified Golden Minerals Company (the “Company”) of his resignation as President and Chief Executive Officer of the Company, effective September 30, 2026.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1011509/000110465926106690/0001104659-26-106690-index.htm
- Executive change
  David H. Watkins was appointed as President and Chief Executive Officer at Golden Minerals Co.
  - Action: appointed
  - Role: President and Chief Executive Officer
  source text: the Board appointed David H. Watkins, a current member of the Board, as President and Chief Executive Officer of the Company, effective September 30, 2026.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1011509/000110465926106690/0001104659-26-106690-index.htm

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