A year after the pretty disastrous Facebook stock market flotation, Twitter lined up for an initial public offering.
The seven-year-old business hit the market in November, with a $31bn (€22bn) valuation. Chief executive Dick Costolo saw his stake valued at over $340m.
Analysts have been split about Twitter's prospects, but in December the shares jumped back up to near a post-flotation high amid optimism that a new advertising product could propel growth. Advertisers will now be able to use subscribers' browsing history and anonymous email addresses to more carefully target their adverts.