The purchase data platform, which has raised more than $200m in financing, is backed by investors including Aimia and Fidelity Information Services.

Amazon Alexa Fund and GV have exited wifi router developer Luma, which had raised $22m, in an acquisition reportedly sized at more than $10m.

American Express Ventures could exit bulk-buying e-commerce platform Boxed, which is considering acquisition offers of up to $500m.

Alibaba has bought $3bn of shares in Ofo from another existing backer, GSR Ventures, according to a relative of GSR's managing director.

The company, which holds the largest share of China's mobile ticket retail market, is backed by Tencent, Meituan-Dianping and Enlight Media.

Sanofi will exit cancer drug developer Impact Biomedicines in an acquistion by Celgene that consists of $1.1bn up front and potentially billions in milestone payments.

The Salesforce Ventures-backed file storage service has some 500 million users and was valued at $10bn as of 2014.

Mocon has exited cellular testing services provider Luxcel Biosciences, seven years after it paud $3.6m for a 16.9% stake in the company.

Viacom has acquired online marketing agency WhoSay, allowing investors including Comcast, Tencent and Amazon to exit.