Dick Costolo, chief executive of Twitter, leaves JP Morgan headquarters after a meeting before the firm's IPO in New York October 25, 2013. Seeking to avoid a repeat of Facebook Inc's much-maligned ... more 
Dick Costolo, chief executive of Twitter, leaves JP Morgan headquarters after a meeting before the firm's IPO in New York October 25, 2013. Seeking to avoid a repeat of Facebook Inc's much-maligned public debut, Twitter Inc revealed more modest ambitions, saying its initial offering would raise up to $1.6 billion (987.8 million pounds) and value the company at up to about $11 billion. REUTERS/Eduardo Munoz (UNITED STATES - Tags: BUSINESS HEADSHOT SCIENCE TECHNOLOGY) less 
1 / 22
Reuters | Photo By EDUARDO MUNOZ / REUTERS
Fri, Oct 25, 2013 5:29 PM EDT