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Rio Tinto’s US boron assets draw interest from bidders, Bloomberg News reports

By Thomson Reuters Apr 10, 2026 | 3:30 PM

April 10 (Reuters) – Rio Tinto’s U.S. assets that produce the critical mineral boron have drawn interest from more than ​a dozen potential bidders and could ‌be valued as much as $2 billion, Bloomberg News reported on Friday, citing sources.

WE Soda, Magris Resources and U.S. Silica Holdings are among the firms interested ‌in ​buying Rio’s boron assets ⁠in California and are ⁠expected to extend binding offers to Rio Tinto by June, according to the report.

Magris Resources declined to comment, Rio and the ​other two bidders did not immediately respond to Reuters’ request for comment.

The mineral boron ⁠is used in nuclear ⁠energy, wind turbines, specialty glass, ​ceramics, advanced insulation, fertilizers, cleaning chemicals and as ​an additive in oil and gas drilling.

Last ‌year, boron was added to the U.S. critical minerals list by the U.S. Geological Survey and the Interior Department, reflecting concerns ⁠over supply risks, limited substitutes and heavy concentration of production outside the U.S.

The potential move to ⁠offload the ‌asset comes after Simon Trott, the ⁠Anglo-Australian miner’s CEO, outlined a ​plan ‌in 2025 to generate $5 billion to $10 ​billion ⁠through divestments and productivity growth, in a move to simplify the structure of the world’s largest iron ore miner.

(Reporting by Carlos Méndez in Mexico City; Editing by Anil D’Silva and ​Sam Holmes)