KAR Auction Services has agreed to pay $425m to buy the online used vehicle marketplace, which had raised about $50m from investors including Renren.

Progress intends to buy software development technology producer Chef for $220m in cash, following $105m in funding from backers including HPE and Citi.

The agreed merger between corporate-backed digital advertisers Outbrain and Taboola has failed nearly a year after plans for a $850m deal were announced.

The SIG-backed, MENA-focused chatroom app developer has filed to raise up to $100m in an offering on the New York Stock Exchange.

Telefónica-owned ElevenPaths has bought cybersecurity training service iHackLabs, which received funding from Telefónica's Wayra unit in 2018.

Grifols has acquired its existing portfolio company Alkahest, five years after buying a 45% stake in the Stanford University spinout.

Grifols agreed the deal five years after supplying $50m in equity and development financing for the neurodegenerative disease therapy developer.

Boston Scientific owns more than 30% of the emphysema treatment device developer, which is targeting $86.3m in its offering.

Digital marketing platform developer Optimizely has agreed to be bought after raising $200m from investors including Citi, Salesforce, Accenture and Alphabet.

QuantaMatrix is targeting $17.80 to $22.30 per share under a regulation permitting a listing on the basis of growth and technology potential.