The company, previously known as Medisys plc, was listed on the Main Market of the London Stock Exchange in June 2000. Following the sale of its main operating subsidiary, Hypoguard Limited, to ARKRAY Inc. of Japan in May 2006, the company became an investing company. In September 2006, simultaneous with the move across to AIM and the change of name, the company raised £4.7 million (£4.4 million net of expenses) through a subscription for new shares by 3i Group plc and the management team.