Another reminder that the stock market is not about how well a company does, it's about how well its stock can be traded. Uber has never made a profit until just now: it could just as easily collapse tomorrow, but it's a good trading stock.
It means a whole bunch of people are going to see this title, not read the article, and go "looks like Uber is doing great" when reality it's incredibly far from doing great. The only thing "doing well on the stock market" signals is that a company's stock trades well on the stock market. It literally tells you nothing about the company itself.