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Rio Tinto has obtained a 53.9% majority stake in Canada's Nemaska Lithium, while the Government of Quebec retains 46.1%. This acquisition is part of Rio Tinto's strategy to establish a fully integrated lithium supply chain in Quebec, targeting the North American electric vehicle market.

The partners have been investing in Nemaska since March 2025 and will continue funding the lithium hydroxide plant in Becancour, with first production expected in 2028. Quebec will invest an additional $200 million in Nemaska, complementing Rio Tinto's previous investment of over $300 million. The company previously acquired a 50% interest in Nemaska through its purchase of Arcadium Lithium PLC.