Twitter had previously shielded these figures by filing its initial IPO documents confidentially, under a new federal law.
Twitter has struggled to keep users online after newcomers satisfy their initial curiosity. Some analysts say the service isn't intuitive. For people without political agendas, brand images or music albums to market, the notion of broadcasting musings to strangers can be perplexing and the Twitter lingo of communicating through "retweets" and "hashtags" confusing.
"They certainly have a lot of work ahead of them to get mainstream America to understand" how Twitter works, said Brian Solis, an analyst at the Altimeter Group.