Samsung Ventures has invested an undisclosed amount in advanced materials company XG Sciences, for it to progress towards the commercialisation of its large-scale graphene applications.

Care.com, a USAA-backed marketplace for housekeeping and care services, raised $91m in its IPO, with a capitalisation of $723m.

Japanese video conferencing company V-cube becomes Intel Capital's sixth portfolio company to list in 2013, as it raises $43m on the Tokyo Stock Exchange.

Inogen, which is backed by Novo and venture firms Versant Ventures, Accuitive Medical Ventures, Avalon Ventures and Arboretum Ventures, has filed for a $86m IPO.

Diagnostics company Oxford Immunotec, backed by Dow Chemical Company and Kaiser Permanente Ventures, raises $62.8m in IPO.

French advertising technology company Criteo raises $250.6m on Nasdaq after twice upping its IPO price and closing higher still.

Duke spin-out Aerie Pharmaceuticals sets its pre-IPO price range.

Social networking service Twitter files IPO registration with a suggested valuation of $12.8bn.