Century Aluminum Company
Century Aluminum Co. is a U.S.-based producer of primary aluminum that operates smelters in the United States and Iceland, with a 55% joint venture interest in the Jamalco bauxite mine and alumina refinery in Jamaica and a carbon anode facility in the Netherlands. The company sells standard-grade and value-added aluminum products into the U.S. and European markets, where proximity to customers helps it capture regional premiums and reduce freight costs versus overseas competitors. Century has also been investing to expand capacity, lower costs, and increase the share of low-carbon and value-added products under its Natur-Al line. Its business is highly tied to electricity, alumina, and aluminum pricing, making operational efficiency and supply-chain positioning central to its model.
Fiscal year 2025 · change from previous year
Development 2020–2025
Business
Share of revenueSmelted aluminum metal sold into industrial and commodity markets, including U.S. and European customers.
Billet, slab and other differentiated products sold at premiums to standard-grade metal.
Lower-carbon aluminum products marketed on sustainability attributes and customer decarbonization needs.
Jamalco alumina off-take and related upstream inputs supporting internal smelter consumption.
Anode production and other ancillary products used internally or sold within the production chain.
Products
Reported · share of revenue- Aluminum88.8 %
- Alumina11.2 %
Source: 10-K FY2025, revenue the company reports per product line (SEC XBRL). Shares are of the lines shown and add up to 100 %.
Customers
Century sells primarily to a small number of large industrial customers and commodity traders, with Glencore representing a major customer relationship and about 54% of consolidated net sales in 2025. Its products are used by downstream manufacturers that need primary aluminum for transportation, packaging, industrial, and other metal-intensive applications. The company emphasizes serving U.S. and European customers from local production sites because shorter supply chains, technical service, and regional premiums improve its value proposition. Customer demand is influenced by aluminum price levels, regional premiums, and the availability of value-added products rather than by consumer branding or retail channels.
They buy large volumes of primary aluminum under short-term contracts and resell or distribute it into end markets; Century relies heavily on this channel, especially Glencore.
They purchase primary aluminum and value-added products for domestic manufacturing and benefit from Century's U.S. smelter locations and Midwest premium access.
They buy metal from Grundartangi in Iceland to secure reliable regional supply and capture European Duty Paid premium economics.
They buy value-added cast products for applications requiring specific shapes, alloys, or performance characteristics.
They source Natur-Al products to support sustainability targets and lower embedded carbon in their supply chains.
Strategy
Century's strategy is centered on improving its cost position, expanding capacity, and increasing the share of value-added and low-carbon products. The company is investing in plant upgrades, restart projects, and sustainability initiatives while keeping a strong balance sheet through commodity cycles. A major strategic pillar is the planned new U.S. smelter with EGA, supported by up to $500 million of DOE funding, which would materially expand domestic primary aluminum capacity. Century also aims to deepen its competitive moat by locating production close to U.S. and European customers and by using vertical integration through Jamalco and its anode operations.
Adds domestic capacity in a protected market and supports long-term growth if financing and permitting are successful.
Differentiated products can earn premiums and reduce reliance on pure commodity pricing.
Electricity, alumina and labor are the main cost drivers, so efficiency directly affects margins.
Large capital projects and commodity volatility require access to cash, credit and external funding.
Geography
Century's operating footprint is concentrated in the United States and Iceland, with upstream exposure in Jamaica and an anode facility in the Netherlands. The U.S. remains the largest commercial market and benefits from tariff protection and the Midwest premium, while Iceland provides access to European customers and the European Duty Paid premium. Jamaica is strategically important because Jamalco supplies alumina that is largely consumed internally, supporting vertical integration. The Netherlands facility supports the Iceland smelter with carbon anodes, reducing supply-chain dependence for a key input.
Risks
Century is exposed to aluminum price volatility, regional premium swings, and cyclical demand because most of its revenue is tied to commodity-linked primary metal sales. Its cost base is sensitive to electricity, alumina and other raw materials, and the company also faces take-or-pay obligations that can limit the benefit of curtailing production. Customer concentration is a major risk because a small number of buyers account for most sales, and the loss of a large customer would quickly affect volumes and pricing. The company also faces execution risk on restart projects, the new EGA smelter, labor relations, cybersecurity, and regulatory or trade-policy changes, including tariffs and environmental rules.
- Primary aluminum price and premium volatilityImpact: HighLikelihood: High
Revenue is linked to LME pricing plus regional and value-added premiums, which can move sharply with supply-demand conditions and trade policy.
Exposure: All smelter sales
- Power and raw material cost inflationImpact: HighLikelihood: High
Electricity, alumina and carbon products are core inputs and represent the majority of cost of goods sold.
Exposure: U.S. and Iceland smelters; Jamalco supply chain
- Project execution and financing riskImpact: HighLikelihood: High
The new smelter and restart projects require large capital outlays, permitting, and external funding to succeed.
Exposure - Customer concentrationImpact: HighLikelihood: Medium
A small number of customers account for most sales, so losing a major buyer would materially reduce shipments and bargaining power.
Exposure: Glencore and other short-term contract customers
- Take-or-pay contractual obligationsImpact: MediumLikelihood: Medium
Century may still owe payments for contracted materials or services even when production is reduced, limiting downside protection.
Exposure: Raw materials and services contracts
- Regulatory and trade-policy changesImpact: MediumLikelihood: Medium
Tariffs, environmental rules and climate-related regulation can change regional premiums, demand, and compliance costs.
Exposure
Accounting
Judgemental itemsCommodity price swings can force inventory write-downs or change gross margin timing.
Impact: Affects cost of sales and reported margins
The atypical structure has required restatement and careful consolidation judgments.
Impact: Affects balance sheet, revenue presentation and comparability
Benefit obligations depend on discount rates, asset returns and actuarial assumptions.
Impact: Affects operating expense and long-term liabilities
Recoverability depends on future taxable income in a cyclical commodity business.
Impact: Affects tax expense and equity valuation
Large restart and expansion projects require capitalization, depreciation and possible impairment judgments.
Impact: Affects EBITDA, depreciation and asset carrying values
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Last updated: 24/09/2026