Energy efficiency motivator Opower is reported to have filed for an IPO.

And when corporations perceive public market mis-valuation they can step in while most universities remain bystanders.

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

Cisco-backed RingCentral raises $98m in IPO and shares stay trading well above offer price.

Toshiba owns 14.4% of Violin having backed its series A round in 2010 and set up a sales agreement for its portfolio company to buy at least 70% of its memory from the Japanese group, according to its regulatory filing.

Cyber attack protection provider files for $175m initial public offering.

Epizyme reports second quarter results including milestones reached and completion of its well-bought IPO.