Plynth Energy, an Abu Dhabi government-owned early-stage fund, has acquired a minority stake in US-based Commonwealth Fusion Systems (CFS). CFS said this agreement expands the deep-tech funding ecosystem for fusion energy by adding the Abu Dhabi early-stage fund to the company’s widening roster of international backers.
This acquisition reflects a broad strategy by Middle Eastern economies to transition into major players within the global fusion supply chain. Plynth Energy targets ancillary areas like precision manufacturing, advanced materials, and diagnostic systems.
In 2025, CFS raised $863m in a Series B2 funding round. The oversubscribed round of capital was the largest amount raised among deep tech and energy companies since its 2021 funding round raised $1.8bn. To date, CFS has raised close to $3bn. The new investment supplements this capital.
CFS, spun-out from the Massachusetts Institute of Technology (MIT) in 2018, is using the funds to complete its SPARC tokamak under construction in Devens, Massachusetts. It will also progress development work on its planned ARC power plant in Chesterfield County, Virginia, which CFS expects will begin operation in the early 2030s. In July 2025, Google signed a power purchase agreement (PPA) for 200 MWe from the ARC power plant and in May became the first fusion company to submit an interconnection application to PJM Interconnection to link its upcoming commercial plant directly into the US power grid.
The scientific community recently validated the core physics of the company’s 400 MW ARC power plant via five peer-reviewed papers. The test reactor, SPARC, is over 75% complete in Devens, Massachusetts, with first plasma projected for 2026/2027.
Experts and industry trackers emphasise that early integration into the regulatory and investment pipeline determines who will lead the upcoming energy landscape. CFS’s mantra is:
Move fast – Revolutionary high-temperature superconducting (HTS) magnets speed the arrival of commercial fusion energy. Move smart – Proven science and manufacturing at scale enables the transition to clean, abundant energy. Move together – Fusion’s rapidly expanding ecosystem includes suppliers and researchers around the globe.
