$450m in additional annual Capex as Alcoa’s South32 deal expected to improve aluminium cost competitiveness

Alcoa’s proposed acquisition of South32’s assets is expected to improve its position on the aluminium industry cost curve while expanding its operations across bauxite, alumina and aluminium.

The transaction includes a bauxite mine and alumina refinery in Western Australia, located next to Alcoa’s existing operations. It also covers South32’s minority interests in the Alumar smelter and refinery in Brazil, along with the Hillside aluminium smelter in South Africa.

Alcoa Executive Vice President and Chief Financial Officer Molly Beerman said the assets were a strong strategic fit with the company’s existing portfolio.

Hillside uses technology already operating at two Alcoa smelters, allowing the company to apply its existing technical and operational expertise to the acquired assets. Alcoa also expects the enlarged portfolio to provide greater scale and resilience across different stages of the aluminium market cycle.

Beerman said, “The assets are a very logical grouping in terms of fit and ability to leverage our expertise.” 

The acquired assets are expected to improve Alcoa’s overall cost position. Beerman said the assets are “slightly better positioned” than Alcoa’s existing operations, which could move the combined portfolio further down the industry cost curve and improve competitiveness.

Alcoa also expects to generate synergies by applying its technical and operational expertise across the acquired operations.

Additional capital investment

Alcoa expects the acquisition to increase its annual capital expenditure by around USD 350 to 450 million, in addition to its existing capital spending plans.

The company had previously forecast capital expenditure of USD 750 million in 2026, followed by about USD 800 million annually for the next three years before coming back to USD 750 million.

Beerman said Alcoa’s due diligence had confirmed the condition of the assets and provided a clearer view of their future capital needs. The company does not expect significant additional investment to bring the assets up to standard. 

The additional capital will support existing operating plans, projects already underway and future development programmes. Alcoa will also continue investing in its ongoing operations, including planned mine moves in Western Australia, residue storage areas and bake furnaces.

After these investments, Alcoa expects its annual capital expenditure to return to around USD 750 million.