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.

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.

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

Stanford spinout QuantumScape is set to merge with NYSE-listed Kensington Capital Acquisition in a $700m deal that will value the combined company at $3.3bn.

Dialpad has bought the video conferencing technology developer, which had raised more than $77m from investors including GV and Dimension Data.

UK-listed water treatment and monitoring business Modern Water, an IP Group portfolio company, is to merge with Integumen in a deal valuing its stock at around $21.3m.