ITM Power plc is an energy storage and clean fuel company founded in the UK in 2001. It designs, manufactures, and integrates electrolysers based on proton exchange membrane (PEM) technology to produce green hydrogen using renewable electricity and tap water. Hydrogen produced via electrolysis is used for mobility, Power-to-X, and industry. The company floated on the Alternative Investment Market (AIM) in 2004, becoming the first hydrogen company publicly listed on the London Stock Exchange (LSE). LSE has also granted the company a Green Economy Mark.