Helion Energy's latest publicly disclosed primary financing record is a $465M Series G dated June 4, 2026. The event is shown on the company page using the event date—not the date Captables published this historical profile.
Thrive Capital is identified as lead investor. Other named participants include Alta Park Capital, Anti Fund, BoxGroup, Lux Capital, Peak XV Partners, Bill Ford, Capricorn Technology Impact Funds, Lightspeed Venture Partners, Mithril Capital, Good Ventures Foundation, SoftBank Vision Fund, Capricorn Investment Group and 2 more.
The preceding primary records in the ledger are $425M Series F dated January 15, 2025; $100M Series D dated April 1, 2023; $0.5 billion with an additional $1.7 billion in commitments Series E Funding Round dated November 2021. These entries describe disclosed company financings; they do not include every secondary trade, employee tender, valuation mark or rumored transaction unless those events are separately labeled in the company ledger.
Helion Energy is ranked number 62 in the Captables Private 100 source universe. It operates in Fusion Energy and is based in United States. Its $5.40B ranking value is a third-party snapshot and should not be treated as a current executable share price or as the valuation for this round.
The round is currently supported by a public financing-database entry rather than an issuer filing, so Captables labels it as database-listed evidence. This page is a public-source reconstruction, not the issuer's stock ledger or legal capitalization table; undisclosed terms remain undisclosed and readers can submit stronger evidence for editorial review.