SPARC — net energy gain Q>1 (target)
~ 2027Commonwealth Fusion Systems
First commercially-relevant machine aiming to pass Q>1, ~75% built.
All actors 
Commonwealth Fusion Systems
Profile
MIT spinout building SPARC, a high-field tokamak targeting net energy gain (Q>1).
Editorial profile — compiled by us from public sources.
- Founded
- 2018
- Headquarters
- Devens, MA, US
- Funding raised
- $2.0B
Current standings
Standings and milestones are always verified by us against primary sources, regardless of who manages the profile.
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Roadmap & milestones
ARC physics validated in 5 peer-reviewed papers
2026-06Commonwealth Fusion Systems
CFS published five peer-reviewed papers (58 authors, a Journal of Plasma Physics special issue) laying the physics basis for ARC — its first commercial plant, designed to deliver 400 MW net to the grid in the early 2030s — building on lessons from SPARC.
