Dropbox, most recently valued at $10B, files for IPO

After gaining a valuation of $10 billion in 2014, Dropbox, the cloud-computing storage company. has confidentially filed the paperwork for an initial public offering expected in the first half of the year, according to Bloomberg. The filing marks the first high-profile tech listing on this year's IPO calendar, coming on the heels of Snap's disappointing offering last year.

The San Francisco-based company has been expected to go public since news reports surfaced last year that it had retained the investment bank Goldman Sachs. 

Dropbox says more than 500 million people use its online software service, designed to let consumers and businesses save documents in the cloud and access them from any device.

The company claims on its website that Dropbox for Business, the premium product considered its most important business, has 200,000 customers.