Keith Rupert Murdoch , AC, KCSG (born 11 March 1931) is an Australian-born American business magnate. Murdoch became managing director of Australia's News Limited, inherited from his father Sir Keith Arthur Murdoch in 1952. He is the founder, chairman and CEO of global media holding company News Corporation, the world's second-largest media conglomerate, and its successors News Corp and 21st Century Fox after the conglomerate split on 28 June 2013.