Commonwealth Fusion Systems (CFS)

Last updated Jul 6, 2026

Fusion Technology Developer Fusion Machine Developer Component Supplier

Projects: 2 Supply Chain Offerings: 1 Funding (Investment): 5 Funding (Nondilutive): 27 Jobs: 121 News: 16 Publications: 17 Articles: 5

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

Why fusion proponents are betting on their big bang to blow up

Oct 8, 2026 • Toronto Star

Commonwealth Fusion Systems to Lead AI-enabled Digital Twin Fusion Project in Second Phase of Genesis Mission

Oct 7, 2026 • Commonwealth Fusion Systems

Commonwealth Fusion Systems Places Largest Single Purchase Order of HTS Tape with Fujikura to Accelerate Development of ARC Power Plants

Sep 29, 2026 • Commonwealth Fusion Systems

Publications

Optimization of ARC-like tokamak stationary operation via core plasma composition and boundary shaping

Oct 8, 2026 • Plasma Physics and Controlled Fusion

The FAST tool for synthetic SXR calculations and determination of impurity density and effective charge (Z eff )

Oct 5, 2026 • Nuclear Fusion

Off-normal simulations of radiative collapse events in Alcator C-Mod

Sep 23, 2026 • Nuclear Fusion

Articles

CFS Places Largest-Ever HTS Tape Order with Fujikura for ARC Power Plant

October 02, 2026 Commercial Fusion

Confinement Time: August 2026

August 31, 2026 Opinion Analysis

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

Environmental, Health & Safety Technician

Intern - Industrial Engineer - Spring or Summer 2027

Intern - Manufacturing Engineer - Spring or Summer 2027

Intern - NRad & Nuclear/Systems Engineer - Summer 2027

Senior Technical Project Manager - Design/Assembly

Senior Technical Project Manager - Magnet Production

Staff Supply Chain Engineer - Molten Salts

Equipment Technician

Controls Engineer

OT/IT Support Engineer

Production Technician Supervisor - Second Shift

Senior Enterprise Solution Architect

Manufacturing Engineer - Contract

Welder - Differential Pay for Weekend & Night Shifts

Production Technician - First Shift

Production Technician - Second Shift

Production Technician - Third Shift

Power Business Research and Analytics Manager

Senior Equipment Engineering Project Manager

Staff Mechanical Engineer