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US nuclear fusion start-up backed by Sam Altman and Peter Thiel secures $425mn

  • Helion, a nuclear fusion startup backed by Sam Altman and Peter Thiel, has secured $425 million in funding, raising its valuation to $5.245 billion.
  • The company plans to open the world’s first fusion power plant by 2028 to supply Microsoft with electricity.
  • Helion's latest prototype, Polaris, aims to be the first fusion reactor to generate electricity, located in Everett, Washington.
  • New investors include Lightspeed Venture Partners and SoftBank Vision Fund 2, while existing investors like Sam Altman also contributed.
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