Twitter Files For IPO, Could Launch At $15-20 Billion Valuation

Twitter has finally filed for its initial public offering, according to a tweet posted on the official Twitter account this afternoon:

We’ve confidentially submitted an S-1 to the SEC for a planned IPO. This Tweet does not constitute an offer of any securities for sale.

— Twitter (@twitter) September 12, 2013

Originally, rumors suggested the social network would file for IPO in 2014.

In July 2011, Twitter raised $400 million giving it a valuation of $8 billion, and sources say its IPO could launch at a $15 to $20 billion valuation.

While official revenue figures have been kept quiet, towards the end of March, eMarketer estimated $582.8 million in revenue for 2013.

Revenue for 2014 is estimated at $950 million, and is expected to increase to $1.33 billion in 2015.

This official filing for IPO comes just three days after Twitter acquired MoPub, a mobile ad exchange platform that will help the social network “integrate real-time bidding into its ads platform.”