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StocksMediumUpdated•Originally published 11 March 2026•Updated 11 March 2026•
1 min read

Rainbow Rare Earths Shares Surge 8% on $916M Brazil Project Deal with Mosaic

Key Facts

1Rainbow Rare Earths signed a project agreement with Mosaic to develop the Uberaba rare earths project in Brazil.
2An economic assessment values the project at a post-tax NPV10 of up to US$916 million.
3The project aims to be a high-margin development situated in the lowest-cost quartile for the industry.

Shares of Rainbow Rare Earths jumped 8% to 28p on the London Stock Exchange following the announcement of a strategic agreement with New York-listed fertilizer giant Mosaic. The partnership focuses on the Uberaba project in Minas Gerais, Brazil, which aims to extract rare earth elements from phosphogypsum, a waste byproduct of Mosaic’s phosphoric acid production. The initiative will utilize Rainbow’s proprietary processing technology to recover materials from waste, targeting a position in the lowest-cost quartile of the global industry. A recent economic assessment for the project revealed a robust post-tax net present value (NPV10) of approximately $916 million. CEO George Bennett stated that the project is designed to replicate the successful model of the company’s Phalaborwa project at a second major production site. This development marks a significant milestone for Rainbow Rare Earths as it secures a high-margin production platform. Investors view the move as a strong fundamental catalyst for the company’s long-term growth in the critical minerals sector.