Mobile ride hailing startup Uber is expected to hit an annual revenue run rate of $10 billion by the end of 2015, sources told Business Insider’s Henry Blodget. Uber keeps 20 percent of every transaction, which means Uber will be netting about $2 billion on $10 billion gross revenue. What’s more, most of Uber’s revenue comes from 10 of its earliest cities, including San Francisco and New York. When its other 140+ cities mature, you can imagine that $10 billion revenue figure multiplying quickly. San Francisco alone generates hundreds of millions of dollars for Uber. Uber is operating in more than 45 countries without having made a single acquisition.