Alcoa Buys South32's Bauxite Assets for $4.1 Billion, Seizing Control of Raw Material Supply

Alcoa agreed 30 June 2026 to acquire South32's bauxite, alumina, and aluminum operations for $4.1 billion. Owning the full supply chain—from ore extraction through smelting—shields Alcoa from long-term fixed-price contracts and spot-market swings. When alumina prices spike relative to finished aluminum, integrated producers capture those margin gains. Vertical control also reduces a chronic smelter vulnerability: dependence on external suppliers.