Novo, Roche, GlaxoSmithKline and Novartis, all of which participated in a $41m round for Alios in April, exited the pharmaceutical company, which was bought by Johnson & Johnson.

Hearst and SingTel both exited after the mobile advertising platform was acquired by Millennial Media for $107.5m.

Parkinson's disease treatment company Civitas has been bought by Acorda for $525m, weeks after it raised a $55m series C round and filed for an IPO.

WPP-backed analytics software company Visible Technologies has been acquired by public relations technology firms Vocus and Cision after raising $30m in funding.

The internet company has finally acquired Vkontakte, bringing an end to a three-year financial, legal and political saga.

Otter, backed by AT&T and The Chernin Group, has bought Fullscreen Media, allowing Qualcomm to exit while WPP stays on as a shareholder.

The corporate-backed fund has had a busy week, as it provided early-stage funding, while also existing through a buyback and an acquisition.

Interactive video analysis and coaching platform Ubersense has been acquired by Hudl, providing an exit to Google Ventures.

Intel and VMware exited the mobile app development company, which raised a $9m series A round last year.

Healthcare management technology company TriZetto has been acquired by IT and consulting company Cognizant Technology Solutions for $2.7bn.