Kolltan, which is backed by Purdue Pharma and Gilead Sciences, will use the proceeds to advance its candidates through early-stage clinical trials.

The car rental company is one of several cornerstone investors that will invest $30m as the China-based company seeks $467m from a Hong Kong initial public offering.

The pharmaceutical company, which is developing treatments for disorders including neuropathic pain and Crohn's Disease, is backed by investors including AbbVie.

The offering will value the corporate-backed incubator and venture fund at approximately $6.45bn.

The e-commerce company is planning to launch the largest IPO ever, putting Yahoo in line to earn $8bn.

ReWalk Robotics, backed by motor technology producer Yaskawa Electric, has updated the terms of its IPO and plans to sell 3.35 million of its shares to raise up to $53.6m.

Clinical-stage biotech company Rhythm Pharmaceuticals, backed by France-based pharmaceutical company Ipsen, has filed to raise up to $86m in an IPO.

Lending Club, an online market place for loans which is backed by Google Ventures, is seeking to raise $500m from its IPO.

The Parkinson's disease drug developer has filed for an initial public offering the day after closing a $55m Alkermes-backed series C round.

The Google and Salesforce-backed sales and marketing software company has raised about $100m in venture funding so far.