PTC Therapeutics, a US-based drugs developer for muscles, raises $144.4m on Nasdaq.

Samsung and Intel-backed YuMe has filed plans to raise $65m in an IPO.

Google Ventures-backed digital coupon marketplace files for $230m IPO on Nasdaq.

Roche-backed biotechnology company files for $69m IPO.

Investment bank Kempen is sole global coordinator for the initial public offering (IPO) after Cardio3 tried unsuccessfully to float in 2011.

Biogen Idec-backed Portola Pharmaceuticals raises $122m on Nasdaq.

SAP and Time Warner-backed video advertising company files for IPO.

Aratana Therapeutics, a US developer of medicines for pets, sets IPO terms.

Epizyme sold 5.1 million shares at $15 each compared to plans to offer 4.285 million shares at between $13 and $15 each.