Broadcast TV and advert social analytics company SecondSync, who developed their business in conjunction with SetSquared, has been acquired by Twitter.

News Corp and IDG Ventures Vietnam were among the corporate investors to achieve partial exits in the automated advertising company's initial public offering.

Online education software provider 2U secures $120m in IPO.

The cloud-based data analysis developer, backed by Google Ventures in 2011, has been acquired by PerkinsElmer for an undisclosed sum.

UniQure, a gene-therapy company based in The Netherlands, has closed its initial public offering which raised $91.8m by selling 5.4 million shares of common stock.

SingTel-backed TubeMogul, developer of a platform that helps companies to brand themselves through online videos, could raise up to $75m when it floats.

The music streaming service, which counts Coca Cola, Goldman Sachs and Fidelity among its investors, has reportedly started talks with investment banks over an initial public offering.

Lithium has acquired US-based Klout, an analytics firm backed by Microsoft that measures online influence, for a reported $200m.

Leeds spin-out performs below expectations on recent IPO on AIM.

Facebook has acquired virtual reality system developer Oculus VR for $2bn, and exiting investors will include Formation 8, which is backed by LPs including LS and Korea Telecom.