Alcoa to buy South32 aluminum assets for $4.1 billion in metals deal

Alcoa Corp. agreed to buy South32 Ltd.'s bauxite, alumina and aluminum operations for $4.1 billion in cash and stock, creating a pure-play upstream aluminum producer with pro forma output of 3.2 million metric tons.

"This is exactly the type of opportunity Alcoa is built to execute," said William F. Oplinger, president and chief executive officer of Alcoa, in a statement. "These high-quality, globally relevant assets are a strong strategic fit within our portfolio."

The deal includes an upfront payment of $3.1 billion in cash and about 17 million newly issued Alcoa shares valued at roughly $1 billion, representing approximately 6 percent of the company's outstanding shares post-issuance. South32 may receive up to an additional $750 million through a contingent value right tied to future alumina and aluminum prices over four annual periods starting July 1. The implied enterprise value stands at about $4.7 billion when including net debt from financing leases.

The acquisition consolidates six assets across Australia, Brazil and South Africa — including the Boddington bauxite mine, Worsley alumina refinery and Hillside aluminum smelter — and positions Alcoa to capture growing demand for critical metals. The transaction is expected to be accretive to earnings per share and free cash flow immediately after closing, with synergies of about $900 million in net present value from operational optimization.

The deal represents roughly 30 percent of Alcoa's $13.75 billion market capitalization as of Tuesday's close, when shares ended at $52.13. The stock has returned 83 percent over the past year even as the company navigated a mixed operating environment, according to exchange data.

Alcoa's pro forma production would reach 3.2 million metric tons of aluminum and 14.8 million metric tons of alumina based on CY2025 figures, strengthening its position on global cost curves. The company said greater integration across bauxite, alumina and aluminum improves supply chain resilience and diversifies mine-to-metal routes for customers worldwide.

The transaction excludes South32's Mozal aluminum smelter in Mozambique. Upon closing, South32 will distribute at least half of the Alcoa shares received directly to eligible shareholders via an in-specie distribution, with the remaining shares to be sold in an orderly manner.

Goldman Sachs & Co. LLC is acting as Alcoa's financial adviser, with Ashurst Perkins Coie, Davis Polk & Wardwell LLP and Cleary Gottlieb Steen & Hamilton LLP serving as legal counsel. The deal has received unanimous approval from both companies' boards and is subject to South32 shareholder approval, regulatory clearances and other customary conditions.

The acquisition comes as Alcoa navigates a mixed operating environment. The company reported first-quarter 2026 earnings per share of $1.40, below the $1.47 consensus estimate, on revenue of $3.19 billion that missed the $3.3 billion forecast. UBS upgraded the stock to Buy from Neutral in recent weeks, citing expectations of stronger aluminum prices after smelter outages in the Middle East.

Alcoa has secured a fully committed $3.1 billion bridge financing from Goldman Sachs, which it plans to replace with cash on hand and permanent debt before closing.

The last time Alcoa pursued a deal of this scale was its 2023 acquisition of Alumina Ltd. for about $2.2 billion, which similarly expanded its bauxite and alumina footprint in Australia. That transaction closed within six months and contributed to the company's current production base of roughly 2.2 million metric tons of aluminum annually.

This article is for informational purposes only and does not constitute investment advice.