UPDATE 1-Oracle's Ellison steps aside, co-CEOs Catz and Hurd take over
September 18, 2014 at 16:32 PM EDT
SAN FRANCISCO, Sept 18 (Reuters) - Oracle Corp's longstanding Chief Executive Larry Ellison stepped down on Thursday, to be replaced by co-CEOs Safra Catz and Mark Hurd, as the business software company looks to modernize and fend off fast-moving cloud-based rivals.