Ten years after its launch, Dropbox has filed to go public. The cloud storage company has been around since 2007 and has raised more than $600 million in funding. TechCrunch reports: We knew that it had already filed confidentially, but the company has now unveiled its filing, meaning the actual IPO is likely very soon, probably late March. The company says it will be targeting a $500 million fundraise, but this number is usually just a placeholder. The filing shows that Dropbox had $1.1 billion in revenue last year. This compares to $845 million in revenue the year before and $604 million for 2015. The company is not yet profitable, having lost nearly $112 million last year. This shows significantly improved margins when compared to losses of $210 million for 2016 and $326 million for 2015. Dropbox has been cash flow positive since 2016.