Uber has filed the prospectus for its upcoming IPO, reporting $11.3 billion in revenue and 91 million active users in 2018. Ridehailing revenue accounted for $9.2 billion of that and has more than doubled since 2016's $3.5 billion. Uber's expenses have grown at a similar rate, with operating losses of at least $3 billion for each of the last three years, according to the prospectus. Echoing Lyft's recent prospectus, Uber said those losses are likely to continue. "We anticipate that we will continue to incur losses in the near term as a result of expected substantial increases in our operating expenses, as we continue to invest," the prospectus said. Uber, expected to go public next month, has not given a price range for its shares. Last year, it was valued at as much as $120 billion, according to The Wall Street Journal.