South32 on Wednesday reported a major sale of almost its entire aluminium business to Alcoa Corporation, a move that sent the miner's shares up as much as 10% to A$4.290. The transaction is structured with a headline value of up to $5.6 billion and was unanimously approved by the boards of both companies.
Under the terms, Alcoa will pay $3.1 billion in cash upfront and issue roughly $1 billion of newly issued Alcoa shares to South32. In addition, the agreement includes a contingent value right worth up to $750 million, which is linked to future alumina and aluminium prices. Both parties expect the deal to complete in the first half of 2027, subject to shareholder and regulatory approvals.
The assets included in the sale comprise South32's interests in Worsley Alumina in Western Australia and the Hillside Aluminium operation in South Africa. In Brazil, the package covers the MRN bauxite mine, the Alumar alumina refinery and an aluminium smelter. The Mozal operation in Mozambique is not part of the transaction; it remains excluded while on care and maintenance.
The announcement coincides with the first day in charge for Matthew Daley as South32's new chief executive. The company described the disposal as a strategic repositioning intended to concentrate on higher-margin copper, zinc, silver and lead operations. As part of the plan to return value to investors, South32 has committed to distribute at least approximately $500 million to shareholders in the form of Alcoa shares in-specie once the transaction closes.
Market context around the announcement was mixed. The wider Australian equities benchmark, the S&P/ASX 200, traded lower by 0.5% on the same day, while Wall Street provided a firmer backdrop overnight with the S&P 500 up 0.8% and the Nasdaq rising 1.5%, giving some supportive global tone to markets.
Sector and market implications - The transaction reshapes South32's commodity exposure by materially reducing its aluminium footprint and increasing the relative focus on base metals such as copper, zinc, silver and lead. The deal also transfers significant alumina and aluminium production capacity to Alcoa.