- China Northern Rare Earth Group processes the majority of global cerium supply from the Bayan Obo deposit in Inner Mongolia
- MP Materials’ Mountain Pass mine produces a rare earth mix that is more than 80% lanthanum and cerium by volume
- Lynas Rare Earths is the only fully integrated non-Chinese producer separating cerium at commercial scale
- Energy Fuels currently produces cerium only as part of an unseparated mixed carbonate, not yet as an individual oxide
- American Elements is a specialty chemicals manufacturer of high-purity cerium products, not a primary extraction-stage producer
Cerium is never mined as a target metal. It is the most abundant rare earth in nearly every bastnäsite and monazite deposit worked today, which means the list of cerium producers is, in practice, the list of companies mining or processing light rare earth ore for neodymium and praseodymium. Cerium arrives as an unavoidable co-product, and its ranking below reflects that structural reality: dominance is a function of concentrate volume, not cerium-specific investment. Global rare earth production context is tracked by the USGS Rare Earths Statistics programme, which remains the standard reference for national output figures.
1. China Northern Rare Earth (Group) High-Tech Co. (SHA: 600111)
China Northern Rare Earth is the world’s largest light rare earth processor and the primary converter of Bayan Obo concentrate into separated oxides, including cerium. The company holds the separation and refining licences for Bayan Obo output and, according to industry tracking, controls roughly 50-60% of China’s total domestic rare earth production quota as of 2026. Its registered capital stands at CN¥3.62 billion. Cerium is produced alongside neodymium, praseodymium, and lanthanum as part of the company’s core light rare earth output, though NdPr remains the highest-value fraction commercially. China’s Ministry of Industry and Information Technology sets the biannual mining quotas that determine how much concentrate reaches China Northern’s separation circuits each year.
2. Baotou Steel Union (SHA: 600010)
Baotou Steel Union is the separately listed entity that mines the Bayan Obo deposit itself, supplying concentrate to China Northern Rare Earth under a long-term agreement rather than separating the oxides in-house. Bayan Obo contains lanthanum, cerium, and neodymium as its three principal light rare earth elements, alongside iron ore and niobium as co-products of the same open-pit operation. Baotou Steel and China Northern sit under the same parent structure, but the mining and separation functions are run as distinct listed businesses, a distinction that matters for anyone tracking ownership or quota allocation through the Bayan Obo supply chain.
3. China Rare Earth Group
China Rare Earth Group is the unlisted state entity formed to consolidate the southern ionic-clay axis of China’s rare earth industry, controlling China Southern Rare Earth Group, Guangdong Rare Earth Industry Group, and Rising Nonferrous Metals. This axis is best known for heavy rare earth output — dysprosium and terbium — drawn from Jiangxi and Guangdong’s ion-adsorption clays, which contain less cerium than Bayan Obo’s carbonate-based ore. Even so, the group’s scale and direct state control make it a structurally significant cerium supplier, since ionic clay deposits still yield light rare earth fractions as part of their overall mineral profile.
4. Shenghe Resources Holding Co. (SHA: 600392)
Shenghe Resources operates two domestic processing hubs — Sichuan for light rare earths including cerium, and Jiangxi for ionic-clay heavy rare earths — and functions as the most internationally exposed Chinese rare earth company, with a 7.7% equity stake in MP Materials and overseas positions spanning Vietnam, Greenland, and Tanzania. The company guided full-year 2025 net profit of RMB790 million to RMB910 million, reflecting stronger 2025-26 pricing. Its long-standing offtake relationship with MP Materials’ Mountain Pass concentrate lapsed in January 2026 after MP halted sales to China, a shift that reduces Shenghe’s access to non-Chinese feedstock going forward.
5. Lynas Rare Earths (ASX: LYC)
Lynas is the only fully integrated producer of separated cerium outside China, mining monazite-rich concentrate at Mount Weld in Western Australia and separating it into finished lanthanum and cerium products at its Malaysia advanced materials plant. The company released Q4 FY26 results on 21 July 2026, reporting AUD 265 million in quarterly revenue with NdPr production continuing to ramp. Lanthanum and cerium form a smaller share of Lynas’s revenue than NdPr oxide, but the company sells both as commercial products to customers across Japan, Europe, and the United States, distinguishing it from producers that stockpile cerium as unseparated byproduct.
6. MP Materials (NYSE: MP)
Mountain Pass in California is the only active rare earth mine in the United States, and its ore body is unusually cerium-heavy: lanthanum and cerium together account for more than 80% of Mountain Pass output by volume, with NdPr making up roughly 15% and SEG+ heavy rare earth concentrate under 2%. MP Materials reported Q1 2026 REO production of 12,983 metric tons, up 6% year on year, and has halted all shipments to China since 2025 in favour of building a domestic supply chain through its Fort Worth, Texas magnet facility. Full production and financial detail is published through MP Materials investor relations. Cerium is therefore a structurally central, if lower-value, output of MP’s operations rather than a marginal byproduct.
7. Neo Performance Materials (TSX: NEO)
Neo Performance Materials operates the Silmet facility in Sillamäe, Estonia, one of the only rare earth separation plants in the Western world, processing light rare earths including cerium alongside small volumes of medium and heavy elements. In 2026 Neo commissioned a heavy rare earth separation line at the same site, producing its first terbium and dysprosium solutions entirely within Europe — a development that runs alongside, rather than replacing, Silmet’s existing light rare earth output. Neo sources concentrate from multiple external suppliers rather than mining its own ore, positioning it as a downstream separator rather than an extraction-stage miner.
8. IREL (India) Limited
IREL is India’s state-owned monazite processor, operating under the Department of Atomic Energy with plants at Aluva (Kerala), Chavara (Kerala), Manavalakurichi (Tamil Nadu), and the Orissa Sands Complex. Its Aluva Rare Earths Division refines monazite-derived mixed rare earth chlorides into high-purity individual cerium and lanthanum compounds, in both oxide and carbonate form, alongside neodymium, praseodymium, samarium, gadolinium, and yttrium products. IREL held a monopoly on monazite mining in India until March 2025, when amendments to the MMDR Act opened the sector to private exploration and mining for the first time in the company’s 75-year history.
9. Energy Fuels (NYSE: UUUU)
Energy Fuels processes monazite at its White Mesa Mill in Utah into a mixed rare earth carbonate (MREC) that contains cerium, lanthanum, neodymium, praseodymium, dysprosium, and terbium — but as of mid-2026, the company has not yet reached commercial separation of individual cerium oxide. Its separation circuit has demonstrated NdPr oxide at commercial scale and is piloting dysprosium and terbium output, with production updates published via Energy Fuels investor relations. Its monazite feedstock pipeline includes the Vara Mada project in Madagascar, projected at 24,000 tonnes of annual monazite production once developed, positioning the company as an emerging rather than current cerium producer.
10. American Elements
American Elements is a specialty chemicals and advanced materials manufacturer that supplies high-purity cerium oxide, cerium carbonate, and cerium nanoparticle products, including polishing-grade powders and precision optical formulations. Unlike the mining and separation companies above, American Elements does not extract or primarily separate cerium from ore; it sources rare earth feedstock and processes it into specialised, application-specific cerium products for glass polishing, catalysis, and electronics customers. Its inclusion here reflects a distinct tier of the cerium supply chain — specialty formulation rather than primary production — that buyers sourcing chemical-grade cerium should understand as a separate category from mine-to-oxide producers.
Cerium’s structural oversupply — a direct consequence of every NdPr-focused mine and refinery generating cerium as an unavoidable co-product — means production capacity tracks light rare earth demand rather than cerium demand specifically. Current SMM pricing and market conditions are tracked on REM’s cerium price page, with applications context available on the top 10 cerium uses page and what is cerium guide.
Who is the largest cerium producer and why?
China Northern Rare Earth Group is the largest cerium producer by volume, owing to its role separating concentrate from the Bayan Obo deposit — the world’s largest known rare earth reserve. Its scale reflects Bayan Obo’s mineralogy rather than any cerium-specific strategy; cerium is a structural co-product of light rare earth processing at that scale.
What criteria determines the cerium producer ranking?
Ranking reflects production scale, structural role in the supply chain (miner, separator, or specialty manufacturer), and verified operational status rather than cerium-specific output alone, since cerium is rarely tracked or reported as an independent production metric by most companies.
Why is cerium never mined as a primary target?
Cerium occurs alongside neodymium, praseodymium, and lanthanum in essentially every commercial light rare earth deposit. Producers target the higher-value NdPr fraction for magnet manufacturing, and cerium output rises or falls automatically with that production rather than through dedicated cerium investment.
What is the difference between a cerium miner, separator, and manufacturer?
Miners extract rare earth-bearing ore or concentrate from the ground. Separators process that concentrate into individual oxide or carbonate products through chemical refining. Specialty manufacturers, by contrast, source already-separated cerium and convert it into application-specific formulations such as polishing powders or nanoparticles, without extracting or separating rare earths themselves.
What structural factors could change the cerium producer rankings over time?
New mine or refinery construction targeting NdPr production, expansion of heavy rare earth separation capacity that shifts a company’s product mix, and Chinese mining quota decisions are the primary variables, since each changes light rare earth concentrate volumes and therefore cerium supply as a direct consequence.
