Commonwealth Fusion Systems (CFS)

Fusion Technology Developer Fusion Machine Developer Component Supplier

Projects: 2 Supply Chain Offerings: 1 Funding (Investment): 5 Funding (Nondilutive): 27 Jobs: 101 News: 11 Publications: 6 Articles: 4

Founding Year

2017

Location

Devens, Massachusetts, United States

Company Founders

Bob Mumgaard

Brandon Sorbom

Dan Brunner

Dennis Whyte

Martin Greenwald

Zach Hartwig

Leadership

Bob Mumgaard, CEO

Brandon Sorbom, Chief Scientific Officer

Website

www.cfs.energy

Commonwealth Fusion Systems (CFS) is developing fusion energy systems which utilize high-temperature superconducting (HTS) magnets. CFS is currently building SPARC, a tokamak with the stated goal of achieving scientific breakeven. After SPARC, CFS plans to develop and build ARC, an electricity producing fusion pilot plant. In addition to these efforts, CFS is a supplier of HTS magnets to other organizations.

News

Commonwealth Fusion Systems Announces Equity Investment by Hyundai Motor Group

Sep 9, 2026 • Commonwealth Fusion Systems

Utilities are racing to link up with fusion startups, with Realta Fusion the latest to benefit

Sep 3, 2026 • techcrunch.com

Fusion energy expert Prof Dennis Whyte appointed next UKAEA CEO

Aug 12, 2026 • United Kingdom Atomic Energy Authority

Publications

Experimental evidence for increased particle fluxes due to a change in transport at the separatrix near density limits on Alcator C-Mod

Sep 9, 2026 • Nuclear Fusion

Alpha particle losses due to ripple and field errors in a SPARC like tokamak

Aug 20, 2026 • Plasma Physics and Controlled Fusion

Characterization of a prototype parallel-plate 238U fission chamber with DD and DT fusion neutron sources

Aug 14, 2026 • Fusion Engineering and Design

Articles

Confinement Time: August 2026

August 31, 2026 Opinion Analysis

Commonwealth Fusion Systems raises $1 Billion from a New Class of Institutional Investors

July 30, 2026 Commercial Fusion

Projects

ARC

Description

The ARC tokamak concept was created by the team at MIT that founded Commonwealth Fusion Systems (CFS). For operation, the ARC tokamak will make use of high temperature superconducting magnets.

The goal of the ARC fusion device is to serve as a commercial, compact power plant for the electrical grid. CFS currently aims to have the first ARC power plant up and running by the early 2030s. The first ARC location has been announced for Chesterfield County, Virginia.

SPARC

Description

SPARC is a high-magnetic-field tokamak which will utilize high-temperature superconductor (HTS) magnets. Its stated goal is to become the first tokamak to achieve energy gain. SPARC is not designed to generate electricity, rather it will be used as a stepping stone to the first ARC which is intended as an electricity producing fusion power plant.

SPARC is anticipated to begin operation in 2027.

Supply Chain Offerings

Supply chain category

High Temperature Superconductor (HTS) Magnets

Product offering

High Temperature Superconductor (HTS) Magnets

Projects Supplied

WHAM

2024 - Present

Supply Chain Category

High Temperature Superconductor (HTS) Magnets

DescriptionCommonwealth Fusion Systems has provided two HTS magnets for the WHAM experiment. These are the strongest magnets ever used in a magnetic mirror configuration.

Funding Received (Investment)

July 30, 2026

round

$1,000,000,000

FundersHyundai Motor Group

AnnouncementCommonwealth Fusion Systems Raises Another $1 Billion, Bringing Total Capital Raised to $4 Billion

August 28, 2025

roundSeries B2

$863,000,000

FundersEni Hostplus

+ 24 More

AnnouncementSeries B2: Commonwealth Fusion Systems Raises $863 Million Series B2 Round to Accelerate the Commercialization of Fusion Energy

December 2, 2021

roundSeries B

$1,800,000,000

FundersFine Structure Ventures DFJ Growth

+ 23 More

AnnouncementSeries B: Commonwealth Fusion Systems Raises $1.8 Billion in Funding to Commercialize Fusion Energy

May 25, 2020

roundSeries A2

$130,000,000

FundersEquinor Temasek

AnnouncementSeries A2: Nuclear Fusion Startup Gets $84 Million to Enter Next Phase

June 27, 2019

roundSeries A

$115,000,000

FundersThe Engine Eni

+ 8 More

AnnouncementSeries A

Funding Received (Nondilutive)

September 10, 2025

programINFUSE

Commonwealth Fusion Systems (CFS)

Founding Year

Location

Company Founders

Leadership

Website

News

Publications

Articles

Projects

ARC

SPARC

Supply Chain Offerings

Projects Supplied

Funding Received (Investment)

July 30, 2026

August 28, 2025

December 2, 2021

May 25, 2020

June 27, 2019

Funding Received (Nondilutive)

September 10, 2025

September 27, 2024

August 8, 2024

August 8, 2024

July 25, 2023

July 25, 2023

July 25, 2023

May 31, 2023

January 17, 2023

January 17, 2023

June 15, 2022

June 15, 2022

June 15, 2022

June 15, 2022

November 22, 2021

November 22, 2021

June 4, 2021

June 4, 2021

November 25, 2020

August 14, 2020

August 14, 2020

August 14, 2020

April 6, 2020

September 23, 2019

September 23, 2019

September 23, 2019

September 23, 2019

Jobs

Fiber Optics Manufacturing Engineer

Manufacturing Engineer - First Shift

R&D Technician - Second Shift

Supply Chain Operations Supervisor

Staff Electrical Engineer

Talent Acquisition Coordinator - Contract

Senior R&D Test Engineer - Fluid Systems

Staff Mechanical Engineer - Vacuum

Quality Engineer - Nights & Weekend Shifts + Differential Pay

Fiber Optic Specialist - Third Shift

Fiber Optic Specialist - Weekend - First Shift (Fri, Sat, Sun)

Fiber Optic Specialist - Weekend - Second Shift (Fri, Sat, Sun)

Lead Assembly Technician - Third Shfit

Lead Technician, Assembly Testing

People Operations Business Partner - Contract

Molten Salt Engineer

Director, Supply Chain

Lead Production Technician - Second Shift

Lead Production Technician - Second Shift

Lead Production Technician - Third Shift