Yahoo buys Stamped, a US-based social recommendations company backed by a consortium including Google Ventures.

In the second quarter, Pfizer had paid $20m for an option to buy NextWave. Pfizer will pay a further $245m if the acquisition is approved and up to $425m in performance fees after Quillivant XR goes on sale in January.

Permira snaps up Ancestry, which raised venture funding from AOL and Compaq, in a take-private deal.

News syndication service Newscred has acquired news aggregation Daylife for an undisclosed amount.

In July last year, US-based search engine Google and US-based technology company Qualcomm's corporate venturing units helped ThinkNear raise $1.6m in seed financing.

A123 Systems is selling its assets to US-based industrial group Johnson Controls for $125m, which has agreed to provide A123 with $72.5m in debtor in possession financing which would allow the company to keep operating during the bankruptcy proceedings.