Otonomy, which is developing treatments for ear disorders, could boost the size of the offering to $115m if the underwriters take up the option to buy more shares.

The pharmaceutical company has raised over $100m in equity funding from investors including Boehringer Ingelheim and Allergen.

Biopharmaceutical company Otonomy is now trading on Nasdaq.

Cardiff spin-out Medaphor has announced its flotation on the Alternative Investment Market.

The firm sold its stakes in digital imaging technology developer Sopat and metrology analysis company Luphos.

E-commerce software producer Lockon, backed by a host of Japan-based corporates, is set to go public in Tokyo.

The Novartis-backed prostate cancer drug developer has filed for an initial public offering after raising more than $100m in funding.

Telstra had already invested $61m for a 23% stake but acquired the Google, Motorola Mobility and Itochu-backed online video service for another $270m.

Backed by its technology-focused fund, one of the three companies will exit via flotation.

E-commerce company Rakuten has acquired portfolio company Slice for an undisclosed amount to get access to data technology for analysis of its users.