Historically, tech companies and start ups have gone with NASDAQ, but many have speculated that given that exchange's recent glitches and Facebook's IPO mishap, Twitter might look elsewhere.
Earlier this month, the company filed an S-1 IPO, writing, "We believe that there is a significant opportunity to expand our user base. Industry sources estimate that as of 2012 there were 2.4 billion Internet users and 1.2 billion smartphone users, of which only 215 million are monthly active users of Twitter."
More to come.