Balderton invested $10.7m with the private equity arm of Debiopharm Group contributing the remaining $2.7m.
The company, which has just launched a mobile app, said the round took place amid “increased speculation around waning interest in Facebook among teens and growing interest in social platforms that support more creative ways for users to interact.”
Urturn noted that it has drawon interest from the music industry with a number of high profile artists including Alicia Keys, One Direction, David Bowie and Gosspihaving signed up.
Balderton founding partner Barry Maloney said, “When we first met the team behind Urturn, we could see that their idea would transform the way people around the world express themselves through social media and we wanted to be involved.
“We are excited to watch the progress and continued word-of-mouth endorsements that have earned Stelio and his team the support of many loyal users already.”
Some of the companies previously backed by Balderton include Bebo, Lovefilm, Betfair, wooga and Friend.ly.
Earlier this month AltAssets reported that Balderton returned to the fundraising market by launching its fifth fund, which is believed to be targeting $400m.
The firm currently manages about $1.9bn across its four funds.
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