Twitter is acquiring mobile advertising exchange MoPub in an all-stock deal worth around $350m.

CRDM, a UK-based 3D printing manufacturer, acquired by US-based peer 3D Systems.

Toshiba owns 14.4% of Violin having backed its series A round in 2010 and set up a sales agreement for its portfolio company to buy at least 70% of its memory from the Japanese group, according to its regulatory filing.

Duke spin-out Regado Biosciences receives $43m in initial public offering.

Google Ventures is reported to have been one of the buyers behind $38.5m secondary offering to Kabam employee shareholders.

Samsung and subsidiary Cheil Industries acquire Dresden spin-out Novaled.