Helion raises $465M at $15.5B valuation to build fusion power plant for Microsoft by 2028
By
Tim De Chant
Summary
Helion, a fusion energy startup backed by Sam Altman, raised $465 million in a Series G funding round led by Thrive Capital, valuing the company at $15.5 billion. The startup is racing to complete Orion, its first fusion power plant, with an ambitious goal of delivering power to the grid by 2028 under a deal with Microsoft. Helion has now raised a total of $1.5 billion, following a $425 million round in January 2025.
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Key quotes
· 3 pulledHelion, the fusion startup backed by Sam Altman, announced on Thursday that it had raised $465 million in a new funding round that values the company at $15.5 billion.
The startup has set an aggressive timeline to deploy fusion power to the grid, as early as 2028 if it can deliver on the terms of its deal with Microsoft.
The new round, a Series G, was led by Thrive Capital with a long list of participants.
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