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

Cox Enterprises was among the returning investors that helped the digital lidar sensor provider take its total funding to $140m.

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.

American Express Ventures has been named as an investor in business payment platform developer Melio, which just closed an $80m round that hiked its overall funding to $144m.

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.

The Qualcomm and Robert Bosch-backed facial recognition technology developer raised $43m in funding from unnamed backers five months after Microsoft exited.

Dollar General, Workday Ventures and NTT Docomo Ventures participated in a round that boosted the staff management software provider's total funding to more than $35m.

Accenture Ventures and existing investor Bloomberg Beta helped the data management platform developer take its total funding to about $40m.