Global mining giant Rio Tinto is drawing significant investor interest for its critical mineral assets in California, as demand for strategic resources continues to surge amid geopolitical competition and the global energy transition.
According to market reports, more than a dozen potential bidders are evaluating Rio Tinto’s U.S.-based boron operations, which could be valued at up to $2 billion. These assets are among the few domestic sources of boron—a mineral increasingly classified as critical due to its wide-ranging industrial and technological applications.
Companies such as WE Soda, Magris Resources, and U.S. Silica Holdings are reportedly preparing binding offers, with bids expected in the coming months. The growing interest reflects the rising importance of securing stable supplies of critical minerals, particularly in Western economies seeking to reduce reliance on foreign sources.
Boron plays a vital role in sectors including renewable energy, nuclear technology, specialty glass, fertilizers, and advanced manufacturing. Its inclusion in the U.S. critical minerals list highlights concerns over supply risks and limited global production capacity.
Rio Tinto’s decision to consider divesting these assets is part of a broader strategy to streamline operations and unlock value from non-core businesses. The company has previously outlined plans to generate between $5 billion and $10 billion through asset sales and efficiency improvements.
The potential sale also comes at a time when governments, particularly in the United States, are prioritizing domestic production of critical minerals for economic security and clean energy development. California remains a key hub, as it hosts the country’s primary boron production facilities.
Industry analysts note that the strong bidding interest underscores the increasing strategic value of industrial minerals that were once considered niche but are now essential to high-tech and green energy supply chains.
As the sale process advances, regulatory scrutiny—especially concerning foreign ownership of critical assets—may play a decisive role in determining the final outcome.