The company is also disclosing that it generated $317 million in revenue in 2012 and that it has more than 215 million active users. That compares with Facebook's nearly 1.2 billion and LinkedIn's 240 million.
The company disclosed last month that it had filed confidential IPO papers to start the process of going public. On Thursday, San Francisco-based Twitter Inc. unsealed the papers with the Securities and Exchange Commission.
Twitter's moneymaking potential has minted the company with an estimated market value of $10 billion, based on the appraisals of venture capitalists and other early investors. The IPO could value it higher or lower.