The medical device developers have agreed a merger, and Merck and Mayo Clinic, both of which have funded Preventice, will continue to support the new company.

Cox Media made its third investment in the marketing company, which has also acquired video content platform Vidaao.

Google and Nokia are both exiting from the image advertising network, which had raised more than $28m, through an acquisition by Yahoo.

The exit is likely to have made a strong return for T-Venture, Deutsche Telekom's corporate venturing unit, which dubbed the company "a star performer" and the deal a "successful exit".

Media conglomerates Time Warner and Cox have contributed to a series C round raised by Dynamic Signal, which brings its overall funding to more than $33m.

Covagen, which is developing treatments for cancer and inflammatory diseases, has been acquired for an undisclosed sum, granting exits to Novartis and Seroba Kernel.

Comcast and SingTel-backed Bubbly, which had reportedly been set to liquidate only two weeks ago, has been bought by networking services company Altruist.

Amazon acquired the video streaming platform, backed by Two-Take Interactive Software among others, for almost $1bn.

The online media company has bought a 51% share of SIG-backed AdSage for almost $100m.