Game livestreaming platform Twitch has bought gamer community, video and information company Curse, which received $30m in funding from Riot Games last year.

Vurb, a contextualised search app that had raised $10m from backers including Tencent, is set to be acquired by Snapchat in a 75-25 stock-cash deal.

GM reportedly approached Lyft, in which it holds a 9% stake, over an acquisition in recent weeks only to be rejected by the ride ordering platform, valued at $5.5bn in January.

CME Group exited deep learning technology startup Nervana Systems, which had disclosed about $25m in VC funding, through the acquisition.

Mobile payment technology provider Citrus Pay is set to be bought for up to $180m in a cash deal that will allow e-commerce companies eContext and Beenos to exit.

Wal-Mart has closed the $3.3bn acquisition of e-commerce company Jet.com, providing exits to Alphabet and Alibaba in the process.

Pfizer invested in Bamboo in the first quarter and has agreed to pay up to $645m in total to acquire the company, depending on milestones.

Alibaba and Alphabet-backed e-commerce platform Jet, which raised money at a $1bn valuation in November, could be acquired by Wal-Mart for up to $3bn.

Intel Capital-backed News Republic has been acquired by Cheetah Mobile for $57m, after raising about $9m from backers also including Xange Private Equity and Creathor Venture.