Helion Energy is a fusion power company aiming to build the world's first fusion power plant.

Commonwealth Fusion Systems is a Cambridge, Massachusetts-based research and development company developing fusion power systems based on ARC tokamak reactors.

Avalanche Energy Designs is an American start-up company designing, testing, and building micro-fusion reactors.

First Light Fusion is a clean energy producer founded in 2011 by Nicholas Hawker.

LeadCold is a company developing lead-cooled small nuclear reactor technology founded in 2013 by Janne Wallenius, Jesper Ejenstam and Peter Szakalos.

Terrestrial Energy is developing molten salt nuclear reactors.

Tokamak Energy is a fusion energy producer founded in 2009 by Alan Sykes, David Kingham and Mikhail Gryaznevich.

Nuclear fusion start-up in Europe researching high-temperature superconductors to simplify the construction of Stellarator devices as well as other applications in medical imaging.

Zap Energy is developing compact fusion power that doesn't require magnets or lasers.

HelicitySpace is a fusion propulsion and power company, developing technology for spacecraft.

A company that was developing an advanced technology mini nuclear reactor, based on intellectual property developed by scientists at Los Alamos National Laboratory. It was located in Denver, Colorado.

A nuclear energy company making a stable salt reactor.

A company developing its own petawatt class and high energy laser system coupled with a sophisticated target physics infrastructure exclusively dedicated to commercial "neutron-lean" fusion energy.

A nuclear reactor design company developing Waste-Annihilating Molten Salt Reactor. The company ceased operations in September 2018.

Company that has developed and operates the world's first continuous-operation enabled, superconducting, high-beta style fusion research device.

A nuclear fusion research company based in Tempe, Arizona.

Arizona Public Service is an electric utility company in Arizona founded in 1886.

TAE Technologies, Inc., formerly known as Tri Alpha Energy, is a California-based renewable energy company focused on developing commercial fusion energy.

A company that develops molecular imaging agents to detect and monitor chronic human diseases

Software platform and professional services for complex systems modeling and simulation, targeting in particular energy networks and urban planning applications.

Radiant is an El Segundo, California-based clean energy company focused on the development of climate-friendly nuclear microreactors.

Ionic Materials is a battery manufacturing company.

Blue Earth Diagnostics Limited is an Oxford-based developer and supplier of molecular imaging agents.

Cloud-based software for managing field services in complex industries like nuclear and oil & gas.

Northstar Medical Radioisotopes, Llc is a Madison, Wisconsin-based company developing products and technologies for medical diagnostics founded in 2006.

Pioneering cleantech company in area of cost-effective renewable energy production and nutrient recycling from wet biomass.

A company developing nuclear reactors with molten salt as coolant and thorium as fuel.