South32, the Australian miner spun out of BHP a decade ago, has agreed to sell its entire aluminium asset portfolio to Alcoa Corporation of the United States in a transaction that values the package at up to $5.6 billion, including the Hillside aluminium smelter in Richards Bay — the only primary aluminium smelter in South Africa and the largest in the southern hemisphere.
| Factor | Detail |
|---|---|
| Upfront cash consideration | $3.1 billion |
| Alcoa shares issued | ~17 million (~$1 billion; ~6% of Alcoa) |
| Total upfront consideration | ~$4.1 billion (R67 billion) |
| Contingent value right (CVR) | Up to $750 million (price-linked, 4 years) |
| Maximum total deal value | $5.6 billion (R92 billion) |
| Implied enterprise value (incl. debt) | ~$4.7 billion |
| Financing | $3.1bn bridge commitment from Goldman Sachs; to be replaced with permanent debt |
| Expected close | H1 2027 (subject to South32 shareholder and regulatory approval) |
| Assets included | Hillside smelter + Bayside (SA); Worsley refinery + Boddington mine (Australia); Alumar + MRN (Brazil) |
| Excluded | Mozal aluminium smelter (Mozambique) |
The deal covers South32’s interests in the Boddington bauxite mine and Worsley alumina refinery in Western Australia, the Hillside smelter and idled Bayside smelter property in South Africa, and the Mineração Rio do Norte bauxite mine together with the Alumar alumina refinery and smelter in Brazil. The Mozal aluminium smelter in Mozambique is excluded from the transaction.
READ – South32 Pulls the Plug on Mozambique’s Biggest Industrial Employer
Alcoa will pay $3.1 billion in cash and approximately 17 million newly issued Alcoa shares valued at around $1 billion, representing about 6% of the company’s outstanding shares following issuance. South32 may receive a further $750 million through a contingent value right linked to future alumina and aluminium prices over four annual periods beginning 1 July 2026. Goldman Sachs has provided a fully committed $3.1 billion bridge facility, which Alcoa intends to replace with permanent debt financing before the transaction closes.
For Alcoa, the strategic logic is direct. The acquisition is expected to reinforce its position as a pure-play upstream aluminium producer by adding low-cost mining, refining, and smelting assets and expanding its global footprint across Australia, Brazil, and South Africa. Hillside in particular — which has been operating for three decades and sits in Richards Bay’s established industrial corridor — gives Alcoa its first presence in South Africa and entry into the African continent’s aluminium production base. The transaction is also expected to be immediately accretive to Alcoa’s earnings per share and free cash flow following closing.
READ – South32 Rebounds with $50m Plan and US Project Push
For South32, the transaction completes a strategic retreat from aluminium that has been in motion for several years. After the conclusion of the deal, South32’s presence in Southern Africa will be reduced to its manganese operations in the Northern Cape. The sale allows South32 to concentrate capital and management attention on its remaining commodity portfolio and return proceeds to shareholders — South32 has committed to distributing at least half of the Alcoa shares received directly to eligible South32 shareholders, with remaining shares sold in an orderly manner.
South32’s COO for Africa, Noel Pillay, noted that over 30 years, Hillside had made a significant contribution to the social and economic development of South Africa, employing thousands of local workers and playing a key role in supporting the downstream aluminium industry — contributions he expected to continue under Alcoa’s ownership. The smelter supports thousands of direct and indirect jobs across KwaZulu-Natal’s value chain, and its continued operation under new ownership is a material consideration for the provincial economy.
The transaction has been unanimously approved by the boards of both companies and is expected to close in the first half of 2027, subject to South32 shareholder approval, regulatory clearances, and other customary conditions.