Helion Secures $425M to Advance Nuclear Fusion Power Plant Development

The startup aims to deliver the first commercial fusion-generated electricity by 2028, despite significant technical challenges.

Helion Energy raised $425 million in a Series F funding round, bringing its total valuation to $5.4 billion.
The funding will accelerate development of its seventh prototype, Polaris, designed to generate electricity from fusion reactions.
Helion has committed to providing 50MW of fusion-generated power to Microsoft by 2028, with financial penalties for missed deadlines.
The company plans to manufacture critical components in-house, including capacitors and thyristors, to streamline production and scale up operations.
Despite notable progress, experts caution that achieving net-positive energy from fusion remains a complex and unproven challenge.