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Pre-Feasibility Study Highlights Significant Mine Life Extension at Mount Milligan, Royal Gold's Largest Stream Interest

Royal Gold, Inc. (RGLD) | September 11, 2025

By Sam Nelson

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Royal Gold reported results of a pre-feasibility study for the Mount Milligan mine confirming a 10-year mine life extension to 2045.

Key highlights include extended mine life, increased throughput and recovery, consistent gold and copper production, and significantly increased reserves.

The company is pleased with the potential for further extensions and long-term value creation for stakeholders.

Extended Mine Life

LOM extension of approximately 10 years, to 2045, with ongoing exploration to expand mineral resources further.

Increased Throughput

Expected 10% increase in process plant throughput in 2029 and improvement in gold and copper recoveries.

Consistent Production

Average annual production of 150,000 ounces of gold and 69 million pounds of copper from 2026 to 2042.

Increased Reserves

56% increase in gold reserves and 52% increase in copper reserves, driven by increased tailings capacity and drilling.

Streamlined Permitting

Path for permitting extension through 2035, with regulators expected to make a decision in the first half of 2026.

  • The study confirms the stability and potential for growth at Mount Milligan, enhancing Royal Gold's position in the mining industry.
  • Increased reserves and production expectations imply continued revenue growth and value creation for the company and its stakeholders.

The pre-feasibility study results demonstrate a bright future for Royal Gold at Mount Milligan with extended mine life, increased reserves, and growth opportunities through streamlined permitting.