The UCL spinout has priced its shares at the top of its range and secured $150m in proceeds, up from its initial target of $100m.
The Northwestern University-backed neurologic disorder therapy developer floated at the top of its range, increasing the share volume at the same time.
EMS-backed gene therapy developer AvroBio has secured $99.7m in an initial public offering that could potentially rise to $115m.
Chain, which has raised $43m from investors including Visa, Orange, Nasdaq, Fiserv, Capital One and Citi, could be acquired for $500m in cash and tokens.
UBC cannabis services spinout Anandia has been acquired by marijuana distributor Aurora Cannabis for $86.5m as Canada prepares to legalise the drug for recreational purposes.
Online advertising platform AppNexus is in talks with AT&T over a deal that would follow more than $340m of funding from backers such as WPP, Microsoft, News Corp and Deutsche Telekom.
Qualcomm, China Mobile and SF Express are among seven cornerstone investors that will buy 10% of the shares in the Hong Kong offering.
Indoor location software provider July Systems, which has received funding from Intel, Acer and Motorola, is set to be bought by Cisco.
Paytm has paid an undisclosed amount for the AI technology developer, which raised $7.7m in a Flipkart-backed round in 2015.
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