A new report from Quartz suggests that Box has already filed its IPO paperwork, taking advantage of the anonymous filing provisions introduced by the 2012 JOBS Act. Box, which stands to gain credibility in the enterprise market through a public listing, has long been expected to go public in 2014. Box has raised $409 million to date, including a $100 million Series F round in December 2013 that valued the company at a reported $2 billion. The company is expected to raise in the neighborhood of $500 million in its IPO. We do not yet have any details on a valuation or which exchange box will choose. [Source: Quartz]