Bill Ackman, head of hedge fund Pershing Square Capital Management, said he'll announce a transformational deal on Tuesday, ...

Billionaire investor Bill Ackman increased his stake in sportswear company Nike by 15% and cut his investment in fast-casual food chain Chipotle Mexican Grill by 14%, during the fourth quarter ...

In 2014, Ackman was named one of the world’s 20 best hedge fund managers when Pershing Square Capital Management delivered investors a $4.5 billion net gain, which brought the fund’s lifetime ...