Helion
Series GHelion is a privately held company based in United States, founded in 2010. The latest disclosed round is Series G ($465m), dated Jun 04, 2026. Institutional investors on record include Lightspeed Venture Partners. Latest valuation on file is 15,5B (Jun 04, 2026).
United States · EST 2010
What is Helion?
Helion is a privately held company based in United States, founded in 2010. The latest disclosed round is Series G ($465m), dated Jun 04, 2026. Institutional investors on record include Lightspeed Venture Partners. Latest valuation on file is 15,5B (Jun 04, 2026). Provider of deuterium fuel-based magnetic-nuclear fusion reactor. CrackTheDeck lists dated rounds and linked fund profiles so founders can see who is already on the cap table before a pitch. Round sizes are shown only when disclosed. Empty fields mean the figure was not in those records. Open a fund name to read that firm's thesis, reported AUM, and recent dated deals. This page is compiled from financings linked to catalog funds. It is not a complete cap table. Founders use this card to check the latest disclosed round, amount, and syndicate before a meeting.
Which funds backed Helion?
Who invested in Helion?
Funds on the dated round table. Open a name to read the fund card.
| Investor | Round | Amount | Date |
|---|---|---|---|
| Lightspeed Venture Partners | Series G | $465m | Jun 04, 2026 |
What do founders ask about Helion?
What is Helion?
Helion is a privately held company based in United States, founded in 2010. The latest disclosed round is Series G ($465m), dated Jun 04, 2026. Institutional investors on record include Lightspeed Venture Partners. Latest valuation on file is 15,5B (Jun 04, 2026). Provider of deuterium fuel-based magnetic-nuclear fusion reactor. CrackTheDeck lists dated rounds and linked fund profiles so founders can see who is already on the cap table before a pitch. Round sizes are shown only when disclosed. Empty fields mean the figure was not in those records. Open a fund name to read that firm's thesis, reported AUM, and recent dated deals. This page is compiled from financings linked to catalog funds. It is not a complete cap table. Founders use this card to check the latest disclosed round, amount, and syndicate before a meeting.
What was Helion's last funding round?
Helion's latest disclosed round is Series G at $465m (Jun 04, 2026).
Who invested in Helion?
Helion has 1 institutional investors on this page, including Lightspeed Venture Partners.
How does CrackTheDeck cover Helion?
This startup card lists dated rounds and linked fund profiles so founders can see who is already in the cap table before a pitch.
How is this page compiled?
Round, amount, and investor names on the Helion card come from dated financings linked to fund profiles in CrackTheDeck. Empty fields mean the figure was not in those records. Updated Aug 2026.