Alcoa NYSE:AA has agreed to acquire South32's bauxite, alumina and aluminum assets in a deal valued at up to $5.6 billion, strengthening its position as one of the world's largest integrated aluminum producers. The transaction includes $3.1 billion in cash, about $1 billion in Alcoa shares, and $750 million of net debt and lease liabilities, with South32 possibly receiving another $750 million if alumina and aluminum prices exceed agreed thresholds over the next four years. Alcoa shares fell nearly 5% in premarket trading, while South32 shares rose as much as 10%, suggesting investors may be weighing the strategic upside against near-term deal pressure.
The acquisition gives Alcoa a broader footprint across bauxite mining, alumina refining and aluminum smelting, with assets in Australia, Brazil and South Africa, while an idled Mozambique smelter remains outside the deal and under South32's strategic review. A key piece of the transaction is South32's Worsley alumina refinery in Western Australia, which will be folded into Alcoa's existing operations in the region. That could be important because Alcoa has been dealing with declining ore grades and permanently shut its Kwinana alumina refinery last year, while also facing environmental opposition over plans to mine a forest in Western Australia for bauxite.
The timing could matter for investors as aluminum demand is expected to be supported by electric vehicles, electricity transmission, renewable energy, packaging and aerospace. Aluminum prices are up 3% this year after Middle East supply disruptions, with the region accounting for nearly a tenth of global output, helped drive a rally between March and May before gains eased as prospects for an end to the Iran war reduced supply concerns. Alcoa said the deal would lift annual production to 3.2 million tons of aluminum and 14.8 million tons of alumina, while Jefferies analyst Christopher LaFemina said the transaction makes strategic and economic sense but could temporarily weigh on Alcoa's share price. The deal is expected to close in the first half of 2027, as South32 shifts toward copper, manganese and zinc-lead-silver assets under incoming CEO Matthew Daley.