Is Dropbox going public?

According to sources, Dropbox has been in talks with banks about an initial public offering for later this year, says Quartz. 
Dropbox, with about 200 million users,  is estimated to be worth around $4 billion with the company’s last round of funding amounting to a quarter billion dollars coming in at the end of 2011.
Dropbox, usually focused on average consumers has recently made a move to increase its corporate customer base with a new version of its storage system. The new software allows IT administrators to have more control over file usage with tracking, permissions and sharing.
The new version puts Dropbox more inline with rival Box, a file sharing service that has focused in recent years on content management security for IT departments.