June 7, 2026
Helion Energy
Helion Energy, a nuclear fusion startup, raised a Series G round to build a fusion plant for Microsoft.
- Round
- Series G
- Amount raised
- $465M
- Lead investor
- Thrive Capital
- Industry
- Nuclear Fusion
- Headquarters
- —
- Employees
- —
- Website
- —
- —
Source: Helion Raises $465M Series G at $15.5B Valuation to Build Fusion Plant for Microsoft