Catherex was spun out of Medigene, which held a 40% stake in the company, in 2010, and Amgen will pay $10.5m, with milestone payments to come.

Konotor, which had obtained about $150,000 in funding from backers including Qualcomm and Target, has been acquired by Freshdesk for an undisclosed sum.

The mobile content delivery company had raised about $21m from backers including Cisco, Qualcomm and IDG, but has reportedly been acquired for less than $4m.

Metanautix, backed by Workday, has been acquired by Microsoft for an undisclosed amount.

PepperTap has acquired Times Internet-backed JiffStore as it secured a $4m extension for its own, corporate-backed series B round.

Samsung has exited flash storage manufacturer SolidFire as the company is acquired by NetApp.

Tencent has fully acquired games developer Riot, in which it already owned a majority stake following a $400m investment in 2011.

Salesforce is reportedly considering an acquisition of SteelBrick for up to $600m, having contributed to its series B and C rounds earlier this year.