Helion raises $465M Series G at $15.5B valuation

Fusion developer Helion Energy closed a $465 million Series G round in early June, lifting the Everett, Washington company's valuation to about $15.5 billion. The round was led by Thrive Capital, with new backers including Lux Capital, Peak XV Partners and Ford Motor executive chairman Bill Ford, and will fund Helion's first power plant, expand Washington manufacturing, and support its pledge to deliver fusion power to Microsoft by 2028. The raise follows Helion becoming the first company in the world to secure regulatory licenses for a fusion power facility and reporting measurable deuterium-tritium fusion at 150 million degrees Celsius on its Polaris prototype.