Facebook Founder and CEO Mark Zuckerberg, shown in this image from Reuters video, rings the NASDAQ Stock Market Opening Bell remotely from "Facebook" headquarters in Menlo Park, California in this May18, 2012 file photograph. Facebook Inc and its lead underwriters Morgan Stanley, Goldman Sachs Group Inc and JPMorgan Chase & Co have requested that shareholder lawsuits over its $16 billion initial public offering be grouped together in Manhattan federal court. In court papers filed late on June 14, 2012 before the U.S. Judicial Panel on Multi-District Litigation, Facebook and the banks said the U.S. District Court in Manhattan was the "most appropriate and convenient forum to oversee these coordinated and/or consolidated proceedings." Over a dozen separate federal shareholder lawsuits have accused Facebook and the underwriters of hiding the social networking company's weakened growth forecasts ahead of the May 18 stock offering, one of the largest ever IPOs.