StubHub reportedly plans to launch its initial public offering (IPO) in September. The company's updates to the filing show that it has seen higher losses and revenue, per the report. It shows a net loss of $35.9 million on revenue of $397.6 million in the quarter ended March 31, up from a net loss of $29.7 million on revenue of $360.1 million a year earlier. StubHub said in a March 21 press release that it filed a registration statement on Form S-1 with the SEC relating to proposed IPO and that it planned ...