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Alcoa Agrees to Buy South32's Aluminum Assets in Deal Worth Up to $5.6 Billion

Published Jun 30, 2026
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Summary:
  • Alcoa will pay $3.1 billion in cash and roughly $1 billion in its own shares to acquire South32's aluminum, alumina, and bauxite assets spread across Australia, Brazil, and South Africa.
  • An additional payment of up to $750 million is possible if alumina and aluminum prices stay above set levels over four years.
  • The deal is expected to close in the first half of 2027.

Alcoa anticipates that long-term aluminum demand will be fueled by sectors including electric vehicles, power grid upgrades, clean energy, packaging, and aerospace. The company is structuring the acquisition as a deal that could reach $5.6 billion in total value. Should alumina and aluminum values remain above predetermined benchmarks for a specified period, the overall cost could rise by as much as $750 million.

Deal Structure and Price Tag

After the deal closes, South32 investors will own roughly 6% of Alcoa. Alcoa will also assume $750 million in net debt and lease liabilities.

The total maximum value of the deal is $5.6 billion.

South32's outgoing CEO, Graham Kerr, is leading the sale. On July 1, Matthew Daley takes over as the new CEO of South32. Going forward, South32 will restrict its holdings to copper, manganese, and zinc-lead-silver assets.

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Why Alcoa Is Buying

Alcoa expects long-term demand for aluminum to keep rising. After the acquisition, Alcoa will produce 3.2 million tons of aluminum and 14.8 million tons of alumina each year. This acquisition cements Alcoa's status among the top fully integrated aluminum companies, covering the entire value chain from bauxite extraction through alumina processing to smelting aluminum.

The company also forecasts operational synergies worth $900 million in net present value. Aluminum prices are up 3% this year. The Middle East region accounts for nearly a tenth of global aluminum output, but Alcoa's newly acquired operations in Australia, Brazil, and South Africa broaden its geographic footprint.

The aluminum industry is currently experiencing a structural shift as automakers and energy companies seek lighter, more recyclable materials to meet emissions targets. Alcoa's expanded footprint in three continents positions it to serve growing demand in both developed and emerging markets, while also reducing its reliance on any single region for raw materials.

Why South32 Is Selling

South32 was spun off from BHP Group Ltd. in 2015. After the sale, the company will dedicate itself entirely to mining copper, manganese, and zinc-lead-silver assets. Selling the aluminum business lets South32 concentrate on those activities.

The transaction gives South32 investors a stake in Alcoa without running the aluminum operations themselves.

What to Watch

Investors will need to watch two things. First, the deal requires approval from shareholders and regulators - that could take time. Second, alumina and aluminum prices will determine whether the extra $750 million payment is triggered.

Alcoa shares traded at $21.66 and South32 shares at A$23.36 the Tuesday before the announcement.

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