Commonwealth Fusion Systems

United States
Primghar, Iowa, United States, 02139

Company profile

Commonwealth Fusion Systems company profile

Commonwealth Fusion Systems develops fusion energy systems using high-temperature superconducting (HTS) magnets to create compact tokamak reactors. It is building SPARC, a demonstration device designed to achieve net energy gain from fusion and laying the groundwork for ARC, a grid-connected fusion power plant targeting early 2030s operation. The company partners with MIT and manufactures its HTS magnets and related components, applying peer-reviewed science in its firewalling of plasma and reactor engineering. It has introduced innovations like the PIT VIPER superconducting cable to support pulsed-power magnet systems and accelerate readiness for commercial fusion.

Business identity

Contact email
[email protected]
Operating status
Active
Company type
For Profit
Employee range
1,001-5,000 employees
Founded
2017-01-01, Year

Headquarters

Postal code
02139
Country code
US
Continent
North America

Capital profile

Funding and company signals

Funding stage
Early Stage Venture
Funding rounds
8
Total equity funding
$2.9B
Last funding
Series B / $863M / 2025-08-27
Last equity funding
Series B / $863M
Investors
55
Lead investors
5
Founders
3
Articles
300

Founders and investors

Founders

Dan BrunnerMartin GreenwaldRobert Mumgaard

Lead investors

Breakthrough Energy VenturesGoogleTemasek HoldingsTiger Global ManagementUS Department of Energy

Investors

DFJ GrowthKhosla VenturesLowercarbon CapitalTemasek HoldingsTiger Global Management