Commonwealth Fusion Systems

Commonwealth Fusion Systems (CFS), a spun out of MIT, is a startup that is designing and building commercial fusion systems to provide limitless, clean energy to the world.

Commonwealth Fusion Systems (CFS) has the fastest, lowest cost path to commercial fusion energy. 

Commonwealth Fusion Systems was founded in 2017 and is headquartered in Cambridge, Massachusetts.


CFS is collaborating with MIT to leverage decades of research combined with new groundbreaking high-temperature superconducting (HTS) magnet technology. HTS magnets will enable compact fusion power plants that can be constructed faster and at lower cost.


CFS has built the world’s first net-energy-gain fusion system, called SPARC. The company also completed their fusion power plant, called ARC, which will produce fusion power onto the grid and demonstrate the science and technology required for economically competitive,


CFS is backed by Tiger Global Management, Bill Gates, Coatue, Temasek, Breakthrough Energy Ventures, The Engine, DFJ Growth,  ENI Next, Khosla Ventures,  Equinor, Emerson Collective, Google, TIME Ventures, and others. The company raised $1.8B in Series B round on Dec 01, 2021. This brings CFS' total funding to nearly $2B to date.



  • Year founded: 2014
  • Funding Info: $2B over 4 Rounds (Latest Funding Type: Series- B)
  • Yearly Revenue: NA
  • Employee Size: 201-500
  • Business Valuation: NA
  • City/Town: Cambridge
  • State: Massachusetts
  • Country: United States
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