Helion raises $425M Series F at a $5.4B valuation

Helion

Helion announced a $425 million Series F funding round at a $5.425 billion post-money valuation, bringing total investment above $1 billion. New investors included Lightspeed Venture Partners and SoftBank Vision Fund 2; proceeds fund scaling of U.S. manufacturing for capacitors, magnets and semiconductors to support Helion's commercialized fusion power platform.

• Series F: $425M at $5.425B post-money valuation; total funding now over $1B.
• New investors: Lightspeed Venture Partners, SoftBank Vision Fund 2, major university endowment.
• Existing backers include Sam Altman, Mithril Capital, Capricorn, Good Ventures, Nucor.
• Proceeds to scale U.S. manufacturing of capacitors, magnets, semiconductors.