SoftBank Vision Fund owns more than 7% of the enterprise messaging platform developer, which could list at a valuation near $17bn.

Uber is set to raise $7.9bn to $9bn if it floats within its range, while PayPal has agreed to invest another $500m through a private placement.

Queensland-founded Admedus Immunotherapies has fallen into administration after a deal with drug developer Constellation Therapeutics failed to materialise.

Walmart has stepped up to acquire SkyDeck alumnus advertisement platform Polymorph Labs after the latter had raised $10.5m in funding.

Mobivia has exited app-based car rental service Drivy, which has been bought by US peer Getaround for $300m, creating a business with more than 5 million users.

University of Washington cancer diagnostics spinout Bellwether Bio has been acquired by Guardant Health, which plans to integrate the former's expertise to advance its own pipeline.

O'Reilly Media, Swisscom and Deutsche Telekom-backed content management software provider has raised nearly $220m in venture funding.

Siemens is set to exit the app orchestration software provider in an acquisition of undisclosed size by CloudBees, having invested in the company in 2014.

The total raised by Oxford’s spinouts was down from $229m year-on-year, though university tech transfer office OUI also marked its largest ever single exit during the period.

Tencent owns more than 40% of the China-based live game streaming platform, which has chosen New York for its initial public offering.