The bankrupt saltwater electrolyte battery developer had raised $190m in financing from investors including Shell, Total and Exelon but was bought for less than $9.2m.

Existing investor Kaplan has returned for a NewSpring Growth Capital-led round that increased the leadership course provider's total funding to more than $23m.

Visa led the payment card issuing platform's latest round, which included two more corporates: CreditEase and existing investor CommerzVentures.

The Intel, Recruit and New York Life-backed machine learning technology developer has added capital to a round that now totals $67.2m according to a securities filing.

Temasek led the Alphabet-backed vegan food developer's latest round, which took its funding over the past three years to about $260m.

Twitter-backed music streaming service SoundCloud is reportedly in advanced talks to sell a majority stake to the two to alleviate financial struggles.

PTB Ventures and Accel have co-led a series A round for Callsign, an authentication platform backed by digital consultancy Reply.

IP Group has returned to back another funding round for Zeetta Networks, a software-defined networking technology developer based on research at University of Bristol.

GV and New Enterprise Associates have co-led a round for the quantum computing technology developer based on University of Maryland and Duke University research.

Dermatology product developer and JLabs graduate Sienna Biopharmaceuticals floated at the middle of its range having raised $86m in venture funding.