Twitter unveils IPO filing, aims to raise $1 billion

By Gerry Shih

SAN FRANCISCO (Reuters) - Twitter Inc will seek to raise $1 billion in the largest Silicon Valley IPO since Facebook Inc's 2012 coming-out party, according to an IPO filing made public on Thursday.

The eight-year-old service, the preferred communications tool for celebrities and politicians alike, gave potential investors their first glance at its financials.

Revenue almost tripled to $316.9 million in 2012, from $106.3 million in 2011. It said about 65 percent of its revenue derives from mobile users. But the company has not made a penny in profits since 2010.

The service had 218.3 million monthly active users, on average, in the three months ended June 30. Three-quarters of its monthly active users are considered mobile users, it said in the filing.

Twitter intends to list common stock under the symbol "TWTR." (Reporting by San Francisco newsroom; Editing by Phil Berlowitz and Bob Burgdorfer)