Blocks a Larger Liberty Media Stake Rupert Murdoch , left , extended a shareholder rights plan or '' poison pill '' that blocks the largest shareholder in the News Corporation , the Liberty Media Corporation of John C. Malone , from buying more shares .
News Corporation
Rupert Murdoch
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Rupert Murdoch
News Corporation
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John C. Malone
Liberty Media Corporation
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PERSON
Rupert Murdoch
ORGANIZATION
News Corporation
ORGANIZATION
Liberty Media Corporation
PERSON
John C. Malone