Freeport-McMoRan hits $100B: Grasberg recovery and output path for mine planners
Reviewed by Joe Ashwell

First reported on MINING.com
30 Second Briefing
Freeport-McMoRan has become only the seventh mining company to exceed a $100 billion market capitalisation, after its NYSE-listed shares rose 4% on Wednesday and 38% year-to-date ahead of Thursday’s Q1 earnings. The company is recovering from a September 2025 mud-rush at the block cave Grasberg mine in Papua, which killed seven workers and triggered force majeure, and now targets restoring 85% of capacity by H2 2026 with forecast output of 1 billion lb copper and 900,000 oz gold. Longer term, Grasberg is planned to average 1.6 billion lb copper and 1.3 million oz gold annually in 2027–2029 under an MoU to extend mining beyond 2041.
Technical Brief
- Mud-rush occurred in a deep block cave setting at >4,200 m elevation in Papua.
- Grasberg previously supplied ~3% of global mined copper, so any safety stoppage has system-wide supply impacts.
- Seven fatalities in a single mud-rush underline the life-safety criticality of cave monitoring and evacuation protocols.
- Transition from open pit to full underground in 2022 concentrates personnel and infrastructure exposure to geotechnical hazards.
- Historic peak output of 1.9B lb Cu and 3.5M oz Au shows very high stress and draw rates to manage safely.
- Remote Sudirman Mountains location complicates emergency response, rescue logistics and medical evacuation planning.
- For other large block caves, incident reinforces the need for conservative mud-rush design criteria, real-time cave monitoring and rigorous trigger-action response plans.
Our Take
Freeport-McMoRan’s move into the $100B tier comes just weeks after it lodged plans for a $7.5 billion El Abra expansion in Chile, signalling that its growth profile is not solely tied to Grasberg and giving it more flexibility to manage any prolonged safety-related constraints in Indonesia.
In our database of 1213 Mining stories, only a handful of copper-focused producers like BHP, Rio Tinto, Vale and Zijin Mining appear consistently alongside Freeport in the $100B-plus valuation bracket, underscoring how concentrated large-scale copper exposure has become at the top of the sector.
The combination of Grasberg’s 3% share of global mined copper and the planned 2027–2029 output profile means any extended disruption at the Papua operation could materially tighten copper availability, amplifying price sensitivity already evident in recent bear-market coverage of copper and gold futures.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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