The Siemens-backed medical device company has agreed to raise $22.1m from its initial public offering, expected to take place later this week.

UK-based medical device company Sphere Medical agreed on Monday to raise £14m ($22.1m) from its initial public offering when the shares are floated on the AIM market of the London Stock Exchange.

Stockholders in Sphere include Siemens Technology Accelerator, the early stage corporate venturing fund belonging to electronics conglomerate Siemens, and Edwards Life Science Corporation, which invested $3.2m in April 2010.

Stuart Hendry, chief executive officer of Sphere, said: "Sphere Medical’s successful admission to AIM is an important further…