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Helion Energy

Helion closes $425m Series F

28 January 2025

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Marathon Fusion closes $5.9m Seed round

28 July 2024

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Helion Energy secures $35m strategic investment from Nucor

27 September 2023

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Helion Energy secures INFUSE award

25 July 2023

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Helion Energy signs PPA with Microsoft

10 May 2023

Helion Energy has agreed to supply electricity from its first fusion power plant to Microsoft, with Constellation overseeing power marketing and transmission. The plant, set to be operational by 2028,…

Helion closes $500m Series E

5 November 2021

Helion successfully completed its Series E funding round, securing $500 million led by Sam Altman and supported by existing investors like Dustin Moskovitz, Mithril Capital, and Capricorn Investment Group. The…

Helion Energy raises $40m in Series D

3 September 2020

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Helion Energy raises $10m in Series C round

1 January 2019

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Helion Energy secures $4m ARPA-E grant

30 September 2015

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Helion Energy raises over $10m in Series B

6 July 2015

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Helion Energy raises $1.5m in Series A

13 August 2014

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Helion Energy secures Seed investment

9 August 2014

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