Rio Tinto stock weighs 1 billion US dollar lithium expansion

Rio Tinto is assessing a further lithium expansion in Argentina that could require about 1 billion US dollars in additional investment, Chief Executive Simon Trott said during a visit to the country this week. Reuters reported the comments on Thursday, October 29, 2026, as the Anglo-Australian miner inaugurated two new lithium plants at the Hombre Muerto salt flat.

The proposed Fenix II project would be located in Catamarca province and represents a possible next phase for Rio Tinto's Argentine lithium platform. Trott said the project remains under consideration rather than approved for construction. The company plans to submit it next year to Argentina's incentive regime for large investments, while a final investment decision could come toward the end of the decade.

Expansion remains under review

That timetable leaves Fenix II as a longer-term growth option rather than an immediate earnings driver. The project could strengthen Rio Tinto's position in the Lithium Triangle, where Argentina, Bolivia and Chile hold a large share of global lithium reserves, but the potential spending remains separate from a committed capital program.

Rio Tinto is also exploring opportunities to advance copper projects in Argentina, according to Trott. Reuters said the company has a 4.4 billion US dollar investment pipeline in the country. The broader focus on lithium and copper gives investors exposure to battery materials and electrification demand, while execution, permitting and the eventual investment decision remain key milestones.

Rio Tinto stock traded at 74.42 euros on Lang & Schwarz at 10:14 CET on Friday, October 30, 2026, 0.29 percent below the Xetra close of Thursday, October 29. Investors can follow the real-time quote of Rio Tinto stock.

Reuters said Argentina is seeking to attract large-scale investment through market-oriented reforms and tax incentives under President Javier Milei. The planned incentive application and later investment decision are the next visible milestones for Fenix II.

Market conditions for global miners remain relevant for Rio Tinto's valuation, with investors balancing commodity prices, project spending and execution across the portfolio; see current market reports.

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