Alcoa Corporation has entered into a definitive agreement to acquire South32 Limited’s interests in bauxite mine, alumina refinery, and aluminum smelter operations for an upfront consideration of approximately $4.1 billion in cash and stock. The transaction represents an implied enterprise value of approximately $4.7 billion when including net debt primarily related to normal course financing leases. Alcoa has also agreed to provide South32 with a contingent value right (CVR) of up to $750 million, which provides additional consideration if the average alumina or aluminum price exceeds agreed strike prices for four successive annual periods commencing on July 1, 2026.
The acquisition will add a high-quality, low-cost, and globally diversified set of mining, refining, and smelting assets, further strengthening Alcoa’s mine-to-metal platform, expanding its global footprint, and increasing the Company’s ability to generate sustainable long-term value for shareholders. The transaction is expected to generate synergies of approximately $900 million in net present value through operational optimization across complementary assets and the application of best practices. Consolidating the life of asset planning across the Western Australia mining and refining operations provides a considerable portion of the anticipated synergies. Additionally, the transaction consolidates South32’s Brazilian joint venture interests in the Alumar alumina refinery and aluminum smelter and provides Alcoa with new growth opportunities and an entry point into South Africa through a globally competitive aluminum smelter.
Financial Impact
The acquisition is expected to be accretive to Alcoa’s earnings per share and free cash flow immediately following closing. Alcoa will pay South32 an upfront consideration of $3.1 billion in cash and approximately 17.0 million newly issued Alcoa common stock carrying an implied value of approximately $1.0 billion, for a total upfront consideration of approximately $4.1 billion. The newly issued Alcoa shares will represent approximately 6% of Alcoa’s outstanding shares post issuance. Alcoa has secured fully committed financing for the transaction in the form of an initial $3.1 billion bridge commitment from Goldman Sachs, which it plans to replace with cash from the balance sheet and permanent debt financing prior to transaction close.
Transaction Details
Under the terms of the agreement, Alcoa will acquire South32’s interests in the Boddington bauxite mine and the Worsley alumina refinery in Western Australia; the Hillside aluminum smelter and idled Bayside smelter property in South Africa; and the Mineração Rio do Norte (MRN) bauxite mine and the Alumar alumina refinery and aluminum smelter in Brazil. The transaction will exclude South32’s Mozal aluminum smelter in Mozambique. Upon closing, South32 will distribute at least half of the Alcoa shares received as consideration directly to eligible South32 shareholders via an in-specie distribution; the remaining shares can be sold by South32 in an orderly manner.
Key Transaction Metrics
| Metric |
Value |
| Upfront consideration |
$4.1 billion |
| Cash consideration |
$3.1 billion |
| Stock consideration |
17.0 million shares (approx. $1.0 billion) |
| Contingent value right (CVR) |
Up to $750 million |
| Expected synergies (NPV) |
$900 million |
| Implied enterprise value |
$4.7 billion |
Closing Conditions and Timing
The transaction is expected to close in the first half of 2027, subject to the approval of South32’s shareholders, the receipt of required regulatory approvals, and the satisfaction of certain other customary closing conditions. The transaction has been unanimously approved by both Alcoa’s and South32’s Board of Directors. Alcoa will hold a conference call at 7:00 p.m. Eastern Time (EDT) on Tuesday, June 30, 2026 (9:00 a.m. AEST on Wednesday, July 1, 2026), to discuss the announcement.
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