Bill Ackman plans to sell Pershing Square's 4.5% UMG stake after the music giant's board rejected his $64-65 billion takeover bid as fundamentally

Bill Ackman plans to sell Pershing Square's 4.5% UMG stake after the music giant's board rejected his $64-65 billion takeover bid as fundamentally

The sale will end a tumultuous five-year relationship between Ackman and the world's largest music company.