Co-founder & CEO
Since Feb 2018 · 8 yrs 9 mos
Profile summary: MIT • Postdoctoral Fellow · BS Engineering Physics (2003-2008) at University of Nebraska-Lincoln
Commonwealth Fusion Systems
Commonwealth Fusion Systems is developing compact, cost-effective tokamak fusion power plants using high-temperature superconducting (HTS) magnets, which enable smaller devices that achieve net energy gain. The company is building SPARC, a net-energy demonstration machine, followed by ARC, a commercial fusion power plant designed to deliver hundreds of megawatts of grid-connected electricity. CFS is collaborating with MIT's Plasma Science and Fusion Center and scaling HTS magnet production to accelerate the path to commercial fusion energy.
- Energy
- Clean Technology
- New Materials
- Hardware
- Artificial Intelligence
Updated 2 days ago
Funding
Raised to date
$4BRaised to date based on public sources. This may differ from the amount the company actually raised and is based only on what is publicly available on the internet.
across 4 rounds
+28$1B · Undisclosed
Announced Jul 2026 · from article date
Disclosed cumulative: $3.8B
4/4
RoundDateAmountValuationInvestors
Founders
Product
Problem
Existing tokamak fusion reactors require immense size and high capital investment to achieve net energy gain, hindering the widespread adoption of fusion as a viable energy source. The large scale and complexity of these systems present significant engineering and economic challenges.
Solution
Commonwealth Fusion Systems (CFS) is developing compact, cost-effective tokamak fusion reactors leveraging high-temperature superconducting (HTS) magnets. These magnets enable the creation of smaller, more powerful magnetic fields, allowing for a significant reduction in the size and cost of tokamak devices while still achieving net energy production. CFS's approach aims to accelerate the deployment of commercial fusion power plants by overcoming the limitations of traditional designs. The company is building SPARC, a commercially relevant net energy fusion machine, as a stepping stone to ARC, a planned fusion power plant that will provide hundreds of megawatts of grid-connected electricity.
Target Audience
CFS's primary target audience includes energy companies, utilities, and governments seeking clean, abundant, and economically viable energy sources to combat climate change. The company also engages with wholesale electricity markets, having applied to PJM Interconnection, the largest U.S. wholesale electricity market.
Features
- High-temperature superconducting (HTS) magnets using Rare Earth Barium Copper Oxide (REBCO) for stronger magnetic fields in smaller volumes
- Compact tokamak design enabling lower capital costs and faster construction times
- SPARC: A demonstration device designed to achieve net energy gain from fusion reactions, built in collaboration with MIT's Plasma Science and Fusion Center
- ARC: A planned commercial fusion power plant based on the SPARC design, capable of producing hundreds of megawatts of grid-connected electricity
- Focus on scalable manufacturing processes for HTS magnets and reactor components, including the largest single purchase order of HTS tape with Fujikura
- AI-enabled digital twin fusion project to accelerate development and validation of fusion power plant designs