He cites disagreements over editorial content published by the company's news outlets and other, unspecified strategic decisions.
James Murdoch, 47, has recently been critical of his father's business and its media coverage.
"My resignation is due to disagreements over certain editorial content published by the Company's news outlets and certain other strategic decisions", Murdoch wrote in the letter, which was filed with the Securities and Exchange Commission on Friday. The resignation was effective Friday. The company also owns the Times, Sunday Times and Sun newspapers in the United Kingdom, as well as a number of Australian publications. His more conservative sibling, Lachlan, is the heir apparent to New Corp Executive Chairman Rupert and is co-chairman of News Corp. "Kathryn and James' views on climate are well established and their frustration with some of the News Corp and Fox coverage of the topic is also well known", they said in January.
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In a joint statement, James Murdoch's older brother, Lachlan, and their father, Rupert, expressed their gratitude to him for his service to the company and wished him the best for the future.
News Corp.is the newspaper publishing arm of the Murdoch empire and parent of The Wall Street Journal, The New York Postas and tabloids and newspaper in Britain and Australia.