USA Rare Earth Names Serra Verde CEO as Barbara Humpton Steps Down

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USA Rare Earth has named Serra Verde CEO Thras Moraitis as its next chief executive officer, signaling a leadership shift as the company moves toward completing its planned merger with the Brazilian rare earth producer and focuses on operational execution.

Moraitis will assume the CEO role on October 1, succeeding Barbara Humpton, who will retire as chief executive and board director after leading the company's transformation into an integrated rare earths platform. Until then, Moraitis will serve as president of the combined company following the anticipated completion of the Serra Verde transaction by the end of August.

The company also appointed current board chairman Michael Blitzer as executive chairman, effective immediately.

The leadership change comes as USA Rare Earth advances its strategy to build a Western "mine-to-magnet" supply chain spanning mining, processing, metal production and permanent magnet manufacturing. The proposed acquisition of Serra Verde, announced earlier this year, is expected to give the company control of one of the few large-scale producers of key magnetic rare earth elements outside Asia, strengthening efforts to diversify global supply chains away from China.

Humpton, who joined the company in 2025, oversaw major strategic milestones, including public-private partnerships and expansion across critical minerals processing, metals and magnet manufacturing. She said the approaching completion of the Serra Verde deal makes this an appropriate time to hand over leadership as the company's priorities shift from building its platform to executing its growth plans.

Moraitis brings decades of mining industry experience, having previously served on Xstrata's executive committee before leading Serra Verde since 2023. Under his leadership, Serra Verde became the only large-scale producer of the four key magnetic rare earths outside Asia.

USA Rare Earth is developing a fully integrated rare earth supply chain through assets including its Round Top deposit in Texas, Less Common Metals in the United Kingdom, magnet manufacturing facilities in Oklahoma, and the planned addition of Serra Verde's Brazilian mining operations. The company has positioned itself as a key supplier of materials used in defense, semiconductors, electric vehicles, renewable energy, and artificial intelligence infrastructure as governments seek to establish secure domestic critical mineral supply chains.

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