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Funding round

Helion Growth

Reported as "Growth Equity"

Helion, which works in fusion energy research and development in Everett, raised $35M in a Growth round announced on 1 Sep 2023. 1 firm took part. It is Helion's fourth venture round on record; the one before was a Series E in Nov 2021.

$35M

Amount raised

Not disclosed

Post-money valuation

1

Investors

no lead named

Valuation

What this round says about the price

Helion did not disclose a valuation in this round; its last disclosed one was $3.00B at the Series E (Nov 2021). It came 22 months after Helion's Series E. It is 2.4% of the $1.47B Helion has raised in the venture rounds on record. Helion raised again 16 months later: a Series F round of $425M in Jan 2025, at $5.42B post-money.

Helion's funding rounds

Helion has 6 venture rounds on record. This one is highlighted.

  1. Seed 1 Jan 2014 $1.5M
  2. Series D 22 Sep 2020, led by Dustin Moskovitz $40M$1.25B post-money
  3. Series E 5 Nov 2021, led by Sam Altman $500M$3.00B post-money
  4. Growth this round 1 Sep 2023 $35M
  5. Series F 28 Jan 2025 $425M$5.42B post-money
  6. Series G 4 Jun 2026, led by Thrive Capital $465M$15.50B post-money

Investors

Who put money in

1 firm took part; no lead investor was named.

Investors

  • Nucor new investor

Comparable rounds

How it compares

23 Growth rounds in Renewable energy companies within a year either side disclosed an amount; the median was $182M, and this round was 19% of the median. The closest in time, other companies' Growth rounds in Renewable energy companies:

Growth rounds in Renewable energy companies, Sep 2022 to Sep 2024: 23 rounds with an amount, log scale.
Comparable rounds
CompanyAnnouncedAmountPost-moneyLed by
Renewable energy companies27 Sep 2023$115Mnot disclosednot named
Renewable energy companies29 Sep 2023$43Mnot disclosednot named
Renewable energy companies28 Oct 2023$182Mnot disclosedOMV AG
Renewable energy companies1 Aug 2023$90Mnot disclosedSPX Capital and Lightrock
Renewable energy companies16 Aug 2023$60Mnot disclosednot named
Renewable energy companies22 Jul 2023$257Mnot disclosedCVC DIF
Renewable energy companies19 Jul 2023$67Mnot disclosednot named
Renewable energy companies4 Jul 2023$39Mnot disclosedClimate Fund Managers

Sources

Where this comes from

Reported by 4 sources.

Questions

Frequently asked

How much did Helion raise in its Growth round?

Helion raised $35M in its Growth round, announced in Sep 2023.

Which investors took part in Helion's Growth round?

Nucor.

What was Helion's valuation at the Growth round?

It was not disclosed; its last disclosed one was $3.00B at the Series E (Nov 2021).

How does it compare with other Growth rounds in Renewable energy companies?

23 Growth rounds in Renewable energy companies within a year either side disclosed an amount; the median was $182M, and this round was 19% of the median.

Did Helion raise again after this round?

Yes: a Series F round in Jan 2025 of $425M at $5.42B post-money.