Rupert Murdoch has insisted the transfer of News Corporation's primary stock market listing from Australia to the US is not a sign he is planning further acquisitions in his adopted homeland.

The media mogul ruled out any takeover bids for rival American media firms like Walt Disney Company or cable giant Comcast. Any such deal would almost certainly run into problems with regulators.

NewsCorp, he said, would concentrate on building its existing US businesses, such as television firm Fox Entertainment and satellite operator DirecTV.

• Separately, the NewsCorp boss backed George Bush to win a second term as American president in this year's election.

"He's going to walk [the election]," Murdoch told an Australian radio station "The economy's doing extremely well and there is an international crisis. You've got to understand, America was attacked. 9/11 changed America -- it was a big moment in history."

Data sourced from: multiple sources; additional content by WARC staff