# Rio Tinto and Chalco to acquire Votorantim's controlling stake in CBA

Rio Tinto and Aluminum Corporation of China Limited (Chalco) have entered into a definitive agreement to acquire Votorantim's 68.596% controlling shareholding in Companhia Brasileira de Alumínio (CBA) through a joint venture owned 33% by Rio Tinto and 67% by Chalco, for approximately $902.6 million.

- Type: Acquisition
- Announced: 2018-05-25
- Where: Brazil
- Value: $902.6M
- Status: announced
- Products: low-carbon aluminium
- Sectors: [Steel and Metal Products](https://endata.com/sectors/steel-metal-products.md)

## Companies

- [Rio Tinto](https://endata.com/companies/4215.md) (acquirer)
- [Aluminum Corporation of China](https://endata.com/companies/20411.md) (acquirer)
- [Votorantim S.A.](https://endata.com/companies/22419.md) (target)
- [Companhia Brasileira de Alumínio](https://endata.com/companies/32162.md) (target)

## Sources

- [business.sherbrookerecord.com](https://business.sherbrookerecord.com/sherbrookerecord/article/bizwire-2026-1-30-rio-tinto-strengthens-its-global-low-carbon-aluminium-footprint-through-joint-acquisition-with-chalco-of-votorantims-interest-in-cba), 2018-05-25: "Rio Tinto and Aluminum Corporation of China Limited (Chalco) have entered into a definitive agreement with Votorantim to acquire, through a joint venture to be owned 33% by Rio Tinto and 67% by Chalco, Votorantim’s 68.596% controlling shareholding in Companhia Brasileira de Alumínio (CBA)."

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Data from Endata (https://endata.com/). Announcements are summarized from public sources and may be incomplete; check the linked originals.