Betfair, the world’s largest online betting website, has launched an initial public offering of shares on the main market of the London Stock Exchange which, at a share price of 13 pounds ($20.41), values the company at 1.39 billion pounds ($2.18 billion). Betfair was initially funded by European venture capital firm Balderton, which sold a large part of its stake to Japanese holding company Softbank, which paid £355 million ($554 million). Softbank currently owns 23% of Betfair while Balderton holds a 7% stake.