https://www.theregister.co.uk/2018/01/12/dropbox_ipo/

DropBox has reportedly filed for an IPO, giving it fresh capital to fund a significant expansion.

Bloomberg has reported that DropBox has lodged confidential papers registering for a public share offering. "Confidential offerings" were introduced in 2012 in the JOBS Act, allowing companies to perform a fund-raising roadshow without lodging a formal public registration with the SEC. Public statements must include accurate and extensive financial statements and identify potential risks. Hey, who needs those?