Rio Tinto and Chalco to acquire stake in Brazil’s CBA

2026-02-02

Feb. 2, 2026 - Rio Tinto and Aluminum Corporation of China Limited (Chalco) have entered into a definitive agreement with Votorantim (the “Transaction Agreement”) to acquire, through a joint venture to be owned 33% by Rio Tinto and 67% by Chalco (the “Joint Venture”), Votorantim’s 68.596% controlling shareholding in Companhia Brasileira de Alumínio (CBA) (the “Transaction”). 

The Transaction, at an all cash consideration of R$10.50 per share in CBA, represents a premium of approximately 21.2% over the R$8.67 per share weighted average trading price of CBA’s stock for the 20 trading days prior to the signing of the Transaction Agreement and values Votorantim’s shareholding in CBA at approximately $902.6 million1 (Rio Tinto’s pro-rata amount being $297.8 million), subject to closing adjustments and the other terms of the Transaction Agreement, including satisfaction of regulatory approvals and customary closing conditions. Following closing, the Joint Venture will launch a mandatory tender offer for the remaining shares in CBA not held by Votorantim, as required by Brazilian law.

The Transaction will leverage Rio Tinto and Chalco’s deep and complementary expertise across the aluminium value chain to unlock the next phase of growth at CBA.

CBA is a vertically integrated low-carbon aluminium business in Brazil, supported by a 1.6 GW portfolio of renewable power generation assets, including 21 hydropower plants and wind power complexes. It serves primarily the growing domestic market, with competitive low-carbon products and operations powered by 100% renewable electricity. CBA has three bauxite mines in production with current production of approximately 2 million tonnes of bauxite per annum, and an aluminium complex in São Paulo (the “Alumínio Complex”), encompassing a 0.8 million tonnes capacity alumina refinery, an approximately 0.4 million tonnes capacity aluminium smelter, secondary recycling capacity of 0.3 million tonnes, and downstream processing facilities.

Rio Tinto Aluminium & Lithium Chief Executive Jérôme Pécresse said: “This acquisition, jointly with Chalco, of Votorantim’s controlling position in CBA’s fully integrated aluminium supply chain in Brazil is aligned with our strategy to deliver value for shareholders by extending our low-carbon, renewable-powered aluminium footprint in rapidly growing markets. It also provides the opportunity to grow our bauxite and alumina supply chain in the Atlantic region.

“Our partnership with Chalco brings together our combined operational excellence, innovation and unique project execution capabilities, unlocking the potential to create value for the benefit of our shareholders, as well as CBA’s employees, customers and local communities.”