---
schema_version: "secwatch.filing_event.v1"
accession: "0000085535-25-000136"
form_type: "8-K"
ticker: "RGLD"
cik: "0000085535"
company_name: "ROYAL GOLD INC"
filed_at: "2025-09-12T23:59:59+00:00"
generated_at: "2026-05-17T06:48:23.017816+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Mount Milligan PFS confirms ~10-year mine-life extension to 2045; reserves up 56%

## Summary
- Centerra's PFS extends Mount Milligan LOM to 2045; throughput to rise 10% to ~66,300 tpd in 2029.
- Proven & probable reserves: 4.4M oz gold (+56% vs 2024) and 1.7B lb copper (+52%).
- Average annual production 2026-2042: ~150K oz gold, ~69M lb copper.
- Permitting for extension through 2035 submitted; second tailings facility planned for early 2030s.
- Royal Gold recovered >150% of advance stream deposit; PFS adds long-term value for stakeholders.

## SEC filing metadata
- accession: 0000085535-25-000136
- form_type: 8-K
- ticker: RGLD
- cik: 0000085535
- company_name: ROYAL GOLD INC
- filed_at: 2025-09-12T23:59:59+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/85535/000008553525000136/0000085535-25-000136-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/85535/000008553525000136/rgld-20250911.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000085535-25-000136
- JSON: https://secwatch.observer/filing/0000085535-25-000136.json
- Plain text: https://secwatch.observer/filing/0000085535-25-000136.txt

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