It's unlikely that they ever will.
Twitter is a privately held company, so it's not listed on a public stock exchange.
Once twitter started to share stocks in the New York stock exchange it officially became a public company.
Know they do not, it hasn't gone public yet.
As of right now twitter is not publicly traded so you could not buy stock in twitter.
Twitter is a private company therfore there is not stock market for them yet.
Twitter is a private company and is not publicly traded.
Yes, the site Twitter is a social network
No, Twitter is not publicly traded. It is a privately held company.
It has no current plans to become a public company.
March 2006
Begins selling stock to the public.
On twitter anyone who is following you sees your updates on their page no matter what.