What is the expected impact of Century Aluminum's Mt. Holly expansion on total US primary aluminum production, and when will it reach full capacity?

Century Aluminum stated that the Mt. Holly expansion in South Carolina is expected to lift total US primary aluminum production by about 10%, and the project is set to reach full production by the end of June.

Why is Century Aluminum's expansion considered rare, and what broader trend does it counter in the US aluminum industry?

The expansion is considered a rare increase in US aluminum output because the US aluminum industry has declined sharply since the early 2000s due to high energy costs and competition from lower-cost overseas producers, leading to numerous smelter closures and growing reliance on imports despite rising domestic demand.

Century Aluminum Sees Expansion Delivering 10% Lift to US Output

Apr 16, 2026

Century Aluminum commenced production at its expanded South Carolina smelter, expected to boost total US primary aluminum output by 10%. The project creates 125 jobs and aims to strengthen domestic supply chains for critical minerals despite high energy costs.

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