COMPANY PROFILE · UPDATED 01 AUG 2026
Commonwealth Fusion Systems
Commonwealth Fusion Systems (CFS) is an American company founded in 2018 aiming to build a compact nuclear fusion power plant based on the ARC tokamak reactor concept. The company is based in Cambridge, Massachusetts, and is a spin-off of…

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Claim it →- Founded
- 2018
- Headcount
- 722
- Open roles
- 0
- Last raised
- Series B · Sign in to view

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Commonwealth Fusion Systems Headquarters Location
148 Sidney Street, Cambridge, MA, 02139
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