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Which companies supply rare earth materials for semiconductors?

AlphaOS investment intelligence · Research and education only — not investment advice · Updated Sep 27, 2026

About rare-earths

Direct answer

The primary suppliers of rare earth materials for semiconductors span mining, processing, and specialty chemicals, with Chinese state-backed firms dominating the supply chain. China Rare Earth Group, Northern Rare Earth Group (Inner Mongolia), and Shenghe Resources collectively control over 60% of global rare earth processing capacity. Outside China, MP Materials (USA) operates the only significant rare earth mine in North America at Mountain Pass, California, while Lynas Rare Earths (Australia) is the largest non-Chinese producer by volume. Specialty chemical companies such as Shin-Etsu Chemical (Japan) and Solvay (Belgium) convert rare earth oxides into high-purity compounds used in semiconductor polishing slurries (CMP), phosphors, and dopants. Universal Display and Merck KGaA supply rare-earth-based materials for advanced display and chip fabrication processes.

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Key Takeaways

  • China controls approximately 85-90% of global rare earth refining and processing, creating significant supply chain concentration risk for semiconductor manufacturers
  • MP Materials (MP) is the sole operating rare earth mine in the United States, producing neodymium, praseodymium, and cerium at Mountain Pass with ~40,000 tonnes of rare earth oxide equivalent capacity annually
  • Lynas Rare Earths (LYC.AX) produces roughly 10,000-12,000 tonnes per year of rare earth oxides and is expanding into the U.S. with a processing facility in Texas backed by DoD contracts
  • Cerium oxide is the dominant rare earth in semiconductor manufacturing, used as a chemical mechanical planarization (CMP) abrasive in wafer polishing; leading CMP slurry suppliers include Cabot Microelectronics (CMC Materials) and Fujimi
  • Shin-Etsu Chemical (4063.T) is a critical downstream processor supplying high-purity rare earth compounds and silicon-rare earth composites to chipmakers including TSMC and Samsung
  • Energy Fuels (UUUU) is an emerging U.S. rare earth producer processing monazite sands to produce mixed rare earth carbonate, with ambitions to supply defense and semiconductor markets
  • Solvay (SOLB.BB) and Neo Performance Materials (NEO.TO) are key specialty rare earth processors outside China supplying purified oxides and alloys to European and North American semiconductor fabs
  • U.S. DoD and CHIPS Act funding have accelerated investment in domestic rare earth supply chains, with over $400 million committed to Lynas, MP Materials, and Energy Fuels since 2020

Evidence & Analysis

  • China produced approximately 210,000 tonnes of rare earth oxides in 2023, representing ~68% of global mine production, per USGS Mineral Commodity Summaries 2024
  • Cerium oxide (ceria) CMP slurries are used in virtually every logic and memory chip fabrication process; the global CMP slurry market exceeded $2.5 billion in 2023 with rare earths as a core input
  • MP Materials reported 2023 production of approximately 41,100 tonnes of rare earth oxide equivalent, with revenue of ~$218 million, making it the largest single non-Chinese producer by mine output
  • The U.S. Department of Defense awarded Lynas Rare Earths a $258 million contract in 2022 to construct a heavy rare earth processing facility in the United States, citing semiconductor and defense supply chain concerns
  • Lanthanum and cerium account for over 50% of total rare earth demand by volume in semiconductor-adjacent applications including catalysts, optics, and polishing compounds
  • China imposed export controls on gallium and germanium in August 2023 and expanded restrictions on rare earth processing technology in December 2023, directly impacting global semiconductor supply chains

Key Companies

MP

MP Materials Corp

Only operating rare earth mine in the U.S. (Mountain Pass, CA); produces ~15% of global rare earth supply; expanding into magnet manufacturing for defense and tech

LYC.AX

Lynas Rare Earths Ltd

Largest non-Chinese rare earth producer; mines in Western Australia, processes in Malaysia; building U.S. facility with Pentagon backing

UUUU

Energy Fuels Inc

Emerging U.S. rare earth producer processing monazite; supplies mixed rare earth carbonate for downstream semiconductor-grade refining

4063.T

Shin-Etsu Chemical Co Ltd

Japanese specialty chemicals giant; supplies rare-earth-based photoresists, CMP materials, and high-purity oxides to leading semiconductor fabs globally

NEO.TO

Neo Performance Materials Inc

Processes rare earths into advanced materials including NdFeB magnetic powders and rare earth oxides used in semiconductor and electronics manufacturing

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