Company
Commonwealth Fusion Systems (CFS)
The world's largest and leading commercial fusion energy company
Also known as Commonwealth Fusion Systems, Commonwealth Fusion Systems LLC
- Status
- Operatingas of 2026-09-18
- Business model
- B2B
- Founded
- 2018
- Legal name
- Commonwealth Fusion Systems LLC
- cfs.energy (opens in a new tab)
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- X (opens in a new tab)
- Press page (opens in a new tab)
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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