Skip to main content
Mythos

Commonwealth Fusion Systems (CFS) is a private fusion energy company, spun out of the 📝MIT Plasma Science and Fusion Center in 2018 to commercialize the high-field approach to fusion power. From its 60-acre campus in Devens, Massachusetts, the company designs and builds the 📝high-temperature superconducting (HTS) magnets and 📝tokamak machines it believes are the fastest path to putting fusion electricity on the grid.

The company's program runs through two machines. 📝SPARC, the demonstration tokamak now in final assembly at Devens, is designed to be the first commercially relevant fusion machine to produce more energy than it consumes, with net energy targeted in 2027. 📝ARC, its successor, is a roughly 400-megawatt commercial power plant planned for the Fall Line Fusion Power Station in Chesterfield County, Virginia, targeted to deliver grid power in the early 2030s with 📝Dominion Energy's development support and offtake agreements already signed by Google and 📝Eni.

Behind those machines sits a capital base of $4 billion raised from investors including Breakthrough Energy Ventures, Khosla Ventures, Eni, Equinor, Temasek, Google, and NVIDIA, and a team of more than a thousand engineers, physicists, and builders. The enabling breakthrough came in September 2021, when CFS and MIT demonstrated a 20-tesla high-temperature superconducting magnet, collapsing the size and cost of a net-energy tokamak.

We are on a mission to deliver clean fusion energy to the planet fast enough to matter for humanity's biggest challenges. The gap between the energy the world needs and the energy it has is widening every day — so we move fast, move smart, and move together.

This library is Commonwealth Fusion Systems' external brain — the connected knowledge surface where its machines, people, and ecosystem live as one navigable whole.

Created with 💜 by One Inc | Copyright 2026