Tokamak Energy
Updated: September 12, 2026
David Kingham, Founder
Country: UK | Funding: $287M (+)
Founded: 2009
Website: http://www.tokamakenergy.co.uk/
Tokamak Energy aims to accelerate the development of fusion energy. It designed, built and operated two of the world’s most advanced fusion facilities: ST40, the world’s highest-field spherical tokamak, and Demo4, the first HTS fusion magnet system to achieve fusion-relevant magnetic fields in a dedicated test facility. ST40 has already achieved a series of major milestones, including a plasma ion temperature of 100 million degrees Celsius, the threshold for commercial fusion energy, plasma current of 1 MA, demonstrating operation in high-performance regimes. ST40 is currently undergoing a major upgrade under LEAPS (Lithium Evaporations to Advance PFCs in ST40), a joint UK-U.S. programme supported by the U.S DoE.
Founded: 2009
Website: http://www.tokamakenergy.co.uk/
Tokamak Energy aims to accelerate the development of fusion energy. It designed, built and operated two of the world’s most advanced fusion facilities: ST40, the world’s highest-field spherical tokamak, and Demo4, the first HTS fusion magnet system to achieve fusion-relevant magnetic fields in a dedicated test facility. ST40 has already achieved a series of major milestones, including a plasma ion temperature of 100 million degrees Celsius, the threshold for commercial fusion energy, plasma current of 1 MA, demonstrating operation in high-performance regimes. ST40 is currently undergoing a major upgrade under LEAPS (Lithium Evaporations to Advance PFCs in ST40), a joint UK-U.S. programme supported by the U.S DoE.
