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.

MIT robotics spin-out Boston Dynamics gets snapped up by Google.

Akamai Technologies, whose products help move content over the internet, has agreed to acquire Intel-backed cloud security company Prolexic Technologies for around $370m.

Innogy Venture Capital sells 20% stake in Voith Hydro Ocean Current Technologies, maker of tidal turbine technology, to the majority shareholder Voith Hydro.

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

Telecommunications company Century Link buys Intel-backed cloud computing and storage firm Tier 3 to build out portfolio of cloud services for enterprises and to "anchor its new CenturyLink Cloud Development Center."