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Company

Commonwealth Fusion Systems (CFS)

Rocket Ship RatingBased on the data VC Catalog holds.

Rocket Ship Rating: 99 out of 100

The world's largest and leading commercial fusion energy company

Also known as Commonwealth Fusion Systems, Commonwealth Fusion Systems LLC

  • Clean energy & storage
  • Climate positive
  • Deeptech
  • Hardware
Status
Operatingas of 2026-09-18
Business model
B2B
Founded
2018
Legal name
Commonwealth Fusion Systems LLC
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Record updated 8 October 2026

About

CFS is using revolutionary high temperature superconducting magnets developed in collaboration with MIT to build smaller and lower-cost tokamak fusion systems. CFS is manufacturing these magnets and building the world’s first commercially-relevant net energy fusion machine, called SPARC. SPARC will pave the way for the world’s first fusion power plant, called ARC. CFS has assembled a world-class team working to design, build, and scale fusion power plants that will deliver cost competitive, clean fusion energy to combat climate change.

Funding snapshot

Total raised
$4BSum of rounds, as of 2026-10-08Source (opens in a new tab)
Latest round
Undisclosed, $1B2026-07-30

Funding rounds

Round, 2026
$1B2026-07-30, Company stated
Series B
$863M2025-08, Announced
Series B
$1.8B2021-11-19, SEC form D sold, 72 investors
Round, 2020
$80.6M2020-05-11, SEC form D sold, 23 investors
Series A
$115M2019, Announced
Round, 2018
$115M2018-05-30, SEC form D sold, 24 investors
Round, 2018
$50M2018, Announced

Products

Hardware
ARC
Web
ARC
Hardware
SPARC
Web
SPARC
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