Century Aluminum Co: management transactions · United States · SEC (Form 4)

About Century Aluminum Co

Century Aluminum Co. is a US-based primary aluminum producer listed on the NASDAQ under ticker CENX, in the United States. The company was formed in 1995 and is headquartered in Chicago, Illinois. Its business model is centered on operating aluminum smelters and supplying standard-grade as well as value-added primary aluminum to industrial customers, with a commercial footprint spanning North America and Europe. Today, Century’s core operating base includes three US smelters in Hawesville, Kentucky; Sebree, Kentucky; and Mt. Holly, South Carolina, plus the Grundartangi smelter in Iceland. Beyond smelting, the company also holds a majority interest in Jamalco, a bauxite mining and alumina refining joint venture in Jamaica, and owns a carbon anode facility in the Netherlands, which helps secure upstream inputs for aluminum production. From an investor’s perspective, Century Aluminum’s equity story is built on a mix of cyclical commodity exposure and a strategic domestic-supply-chain angle. Aluminum is a globally traded commodity, and Century’s results are influenced by LME prices, regional premiums, energy costs, operating rates, and raw-material availability. At the same time, the company has been positioning itself as a more strategic North American supplier by investing in capacity, improving cost structure, and increasing the share of higher-value products. The company’s disclosed annual primary aluminum production capacity is roughly 1.02 million tonnes, although actual output fluctuates depending on curtailments, maintenance, and restart activity. Recent developments are important for understanding the current investment case. In 2025 and 2026, Century reported major progress at Mt. Holly in South Carolina, including expanded production that is expected to lift total US primary aluminum output. The company also entered into a joint development agreement with Emirates Global Aluminium to build the first new primary aluminum smelter in the United States since 1980, in Inola, Oklahoma. Century has described that project as a transformational step for US aluminum supply, with the potential to materially expand domestic production capacity and reinforce the company’s position as the largest primary aluminum producer in the United States. In parallel, Century highlighted supportive US Section 232 tariff changes and the value of domestic sourcing. Overall, Century Aluminum combines a commodity-linked earnings profile with a strategic industrial thesis tied to US manufacturing, supply-chain resilience, and long-term capacity growth.