Rio Tinto shares declined during Friday trading, with the global mining giant falling to $88.35, down $2.35 or 2.59% in the session. The drop came as investors reacted to operational disruptions at one of the company’s major mines while also assessing updates about the company’s lithium expansion plans.
During the trading session the stock slipped steadily from levels near $90.70 earlier in the day, falling below the $89 mark before stabilizing around the mid-$88 range as selling pressure increased.
Fatal incident triggers mining suspension
Investor sentiment weakened after a fatal accident involving a contractor at Rio Tinto’s Kennecott copper mine in Utah. The incident occurred at the Bingham Canyon mining complex, one of the company’s most significant copper operations.
Following the accident, Rio Tinto temporarily suspended mining activity at the site while safety investigations are conducted. Operational disruptions at a major mining facility can affect production output and often weigh on investor confidence.
During the broader trading session the basic materials sector declined about 0.51%, while the S&P 500 fell roughly 0.38%. Rio Tinto’s sharper decline reflected additional company-specific concerns linked to the mine suspension.
Quebec lithium plant construction slows
Separately, Rio Tinto confirmed it will slow the pace of construction at the Nemaska Lithium processing plant located in Becancour, Quebec. The company cited rapidly rising construction costs as the main reason behind the decision.
Many contractors working on the project will stop operations in the coming weeks, leaving only a minimal workforce at the site until construction resumes. Full development of the facility is expected to restart in 2027.
The Becancour lithium processing plant is already more than 70% completed, and Rio Tinto said it still expects the facility to begin operations in 2028. The company added that it will continue investing significantly in its Quebec lithium operations, including more than $300 million in 2026.
Rio Tinto recently increased its ownership stake in the Nemaska project to 54% after making several investments to expand its position.
The plant is designed to produce lithium hydroxide, a crucial component used in batteries for electric vehicles. Nemaska Lithium signed a long-term supply agreement with Ford Motor Co. in 2023 to provide battery materials for EV production.
The construction slowdown was first reported by Bloomberg, which cited rising project costs as a key factor behind the decision.
Lithium strategy remains a long-term focus
Despite the temporary slowdown, Rio Tinto continues to expand its presence in the lithium sector as part of its broader energy transition strategy.
The company is currently reviewing whether the Galaxy hard-rock lithium development in the James Bay region or Nemaska’s Whabouchi lithium mine offers stronger long-term potential. A final evaluation is expected in the first half of 2026, with industry sources indicating the Galaxy project currently appears favored.
Rio Tinto is also advancing its Rincon lithium project in Argentina, which is expected to produce around 60,000 tonnes of battery-grade lithium carbonate annually once operational.
Analyst outlook remains mixed
Analysts currently maintain mixed views on Rio Tinto’s stock. Bernstein continues to rate the shares Outperform but recently reduced its price target, while JPMorgan downgraded the stock to a Neutral rating.
Beyond lithium, Rio Tinto is also expanding its sustainability initiatives, including partnerships aimed at increasing the supply of low-carbon aluminum for rapidly growing industries such as data centers and renewable infrastructure.
The company’s latest share price movement reflects a combination of short-term operational disruptions and longer-term investment decisions. While recent news has weighed on sentiment, Rio Tinto’s strategy to expand into critical battery metals and sustainable materials remains central to its future growth plans.
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