Premier Alternatives

Helion

Alternative Energy Equipment · Everett, WA · Founded 2013 · Privately Held (backing)

Developer of a fusion energy technology designed to generate clean electricity through controlled nuclear fusion. Helion is based in Everett, WA and was founded in 2013. It was valued at $15 billion at its Series E in Nov 2021, the last priced event on record. It has raised $1 billion across 2 recorded rounds; the latest was a $500 million Series E in Nov 2021.

PMV mark · valuation
$15.0B
Oct 2026
Priced at
its Series E
Nov 2021
Total raised
$1.0B
Last round
Later Stage VC (Series E)
Nov 2021

Helion key facts

as of Oct 2026
  • Developer of a fusion energy technology designed to generate clean electricity through controlled nuclear fusion.
  • Helion is valued at approximately $15.0B as of Oct 2026, set at its Series E, Nov 2021; nothing has traded since, per PrivateMarketView’s mark.
  • It has raised $1.0B across 2 recorded rounds; the latest was Later Stage VC (Series E) ($500.0M) in Nov 2021.
  • Notable investors include Y Combinator, Lightspeed Venture Partners, U.S. Department of Energy, SoftBank Investment Advisers, Sand Hill Angels — 25 tracked in total.
  • Status: Privately Held (backing).
PrivateMarketView mark
LOW confidence
$15.0B

Valued at $15.0B at its Series E, Nov 2021. Nothing has traded since.

set by its last priced roundas of Oct 2026question about this number?
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Helion funding rounds

2 rounds
Nov 2021Later Stage VC (Series E)$500.0M▮
Sep 2020Later Stage VC (Series D)$39.8M▮
Full funding history →

Helion valuation

Helion was valued at $15 billion at its Series E in Nov 2021. That is the last priced event on record: no secondary trade or institutional fund mark has moved the figure since.

How much has Helion raised?

Helion has raised $1 billion in total; 2 of its rounds are on record. The largest on record was a $500 million Series E in Nov 2021.

Helion investors

25 investors are on record for Helion, including Y Combinator, Lightspeed Venture Partners, U.S. Department of Energy and SoftBank Investment Advisers. By type, the record holds 5 venture capital firms and 3 hedge funds. The Series E in Nov 2021 drew 14 investors.

Comparable companies

Comparable alternative energy equipment names by valuation on PrivateMarketView: Tae ($6 billion), Radiant ($1.9 billion) and Enpal ($535 million).

About Helion

Developer of a fusion energy technology designed to generate clean electricity through controlled nuclear fusion. The company's technology offers proprietary fusion reactors, advanced plasma control systems, and integrated power generation technology built specifically for electricity production, enabling utilities, energy partners, and large-scale power users to produce continuous, clean electricity without fuel scarcity or carbon emissions.

Industry
Alternative Energy Equipment
Sector
Energy
HQ
Everett, WA, United States
Founded
2013
Employees
483
Ownership
Privately Held (backing)

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