Loading organizations...
Loading organizations...
Commonwealth Fusion Systems (CFS) builds compact, high-field, net-energy fusion systems designed to deliver commercial fusion power. The company leverages revolutionary high-temperature superconducting (HTS) magnets, developed in collaboration with MIT, to enable smaller and more cost-effective tokamak fusion devices. Their core technical approach centers on proving net energy gain with their SPARC system, paving the way for commercially viable fusion power plants like ARC.
CFS was founded in 2018 as a spin-off from the Massachusetts Institute of Technology. Co-founders Bob Mumgaard, Zach Hartwig, Brandon Sorbom, and Daniel Brunner emerged from MIT's Plasma Science and Fusion Center, driven by the insight that advanced HTS magnet technology could dramatically accelerate the timeline for achieving practical fusion energy. Their collective expertise provided the foundation for transitioning decades of academic research into a private sector initiative.
The company aims to supply global energy grids with clean and abundant power, addressing the urgent need for sustainable energy solutions. CFS envisions a future where its fusion technology provides a critical, cost-competitive alternative to fossil fuels, actively contributing to the combat against climate change and facilitating a significant transition in the world's energy landscape.
cfs has raised $2.7B across 3 funding rounds.
cfs has raised $2.7B in total across 3 funding rounds.
Commonwealth Fusion Systems (CFS) builds compact, high-field, net-energy fusion systems designed to deliver commercial fusion power. The company leverages revolutionary high-temperature superconducting (HTS) magnets, developed in collaboration with MIT, to enable smaller and more cost-effective tokamak fusion devices. Their core technical approach centers on proving net energy gain with their SPARC system, paving the way for commercially viable fusion power plants like ARC.
CFS was founded in 2018 as a spin-off from the Massachusetts Institute of Technology. Co-founders Bob Mumgaard, Zach Hartwig, Brandon Sorbom, and Daniel Brunner emerged from MIT's Plasma Science and Fusion Center, driven by the insight that advanced HTS magnet technology could dramatically accelerate the timeline for achieving practical fusion energy. Their collective expertise provided the foundation for transitioning decades of academic research into a private sector initiative.
The company aims to supply global energy grids with clean and abundant power, addressing the urgent need for sustainable energy solutions. CFS envisions a future where its fusion technology provides a critical, cost-competitive alternative to fossil fuels, actively contributing to the combat against climate change and facilitating a significant transition in the world's energy landscape.
cfs has raised $2.7B in total across 3 funding rounds.
cfs's investors include Dennis Lynch, Bill Gates, Eric Schmidt, Stanley Freeman Druckenmiller, Carmichael Roberts, Brevan Howard, Laurene Powell Jobs, Eni, Nadim Haidar, Maryanna Saenko, Sam Englebardt, Michael Schroepfer.
cfs has raised $2.7B across 3 funding rounds. Most recently, it raised $863.0M Commonwealth Fusion - Series B in August 2025.
| Date | Round | Lead Investors | Other Investors |
|---|---|---|---|
| Aug 28, 2025 | $863.0M Commonwealth Fusion - Series B | Dennis Lynch, Bill Gates, Eric Schmidt, Stanley Freeman Druckenmiller, Carmichael Roberts, Brevan Howard, Laurene Powell Jobs, Eni, Nadim Haidar, Maryanna Saenko, Sam Englebardt, Michael Schroepfer, Google, Hostplus, Vinod Khosla, Lowercarbon Capital, Mario Costantini, NVIDIA, Frédéric de Mévius, Nader Motamedy, Matias Mosse, Tiger Global, Woori Venture Partners | |
| Dec 1, 2021 | $1.8B Commonwealth Fusion - Series B | Carri Lockhart | Bill Gates, John Doerr |
| May 26, 2020 | $84.0M Commonwealth Fusion - Series A | Temasek | Breakthrough Energy Ventures, Devonshire Investors, Sophie Hildebrand, Steve Jurvetson, Hostplus, Khosla Ventures, Safar Partners, Schooner Capital, Starlight Ventures, The Engine |