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Fusion energy startup Helion raised a $465M Series G led by Thrive

Fusion energy startup Helion raised a $465M Series G led by Thrive Capital at a $15.5B valuation, nearly tripling the valuation from its January 2025 round

Helion, the fusion startup backed by Sam Altman, announced on Thursday that it had raised $465 million in a new funding round that values the company at $15.5 billion.

Source: TechCrunch · Opens in new tab