Ceres Power has completed its move to the Main Market of the London Stock Exchange from AIM.
Phil Caldwell, fuel cell specialist Ceres Power's chief executive, said: "As a UK technology business playing an important role in decarbonising the global energy system, we are proud to graduate to the LSE's Main Market.
"We are committed to realising our ambition to have multi-gigawatts of clean energy technology under licence with global partners in the coming decade.".
A copy of a prospectus issued ahead of the move is available on Ceres' website.