Twitter has agreed to buy the Times Internet-backed mobile marketing company for a price reported to be about $40m.

Cisco and UMC-backed fabless semiconductor producer EnVerv has been acquired by semiconductor supplier Semtech.

Mobile game developer Kabam has acquired games studio TapZen, which had raised $18m in venture funding from Tencent and Zynga.

Cloud payment provider Bottomline Technologies has acquired the fraud detection and prevention company for $67m.

Alibaba has acquired a majority stake in News Corp-backed digital advertising platform AdChina for an undisclosed sum.

Novo-backed Tobira, which failed to go public last year, plans to merge with another pharmaceutical company, Regado Biosciences, whose stock has fallen to about $1.00.

Bellerophon, which was spun out of biopharmaceutical company Ikaria last year, has filed for an initial public offering on Nasdaq.