Uber Technologies Inc has filed paperwork for an initial public offering, according to three people with knowledge of the matter, taking a step closer to a key milestone for one of the most closely watched and controversial companies in Silicon Valley.

source https://www.reuters.com/article/us-uber-ipo/uber-confidentially-files-for-ipo-sources-idUSKBN1O702G?feedType=RSS&feedName=technologyNews