Bill Ackman

Bill Ackman, born May 11, 1966, is an American investor and hedge fund manager. He founded Pershing Square Capital Management in 2004, a firm known for its activist investing strategies. Ackman gained widespread attention for his short position against MBIA, a financial services company, during the 2008 financial crisis, predicting its collapse due to risky mortgage-backed securities. In 2012, Ackman famously took a $1 billion short position against Herbalife, labeling it a pyramid scheme, though this position was later covered at a loss. Ackman also played a pivotal role in the turnaround of Canadian Pacific Railway, where his strategic initiatives helped significantly improve the company's performance. As of recent years, he continues to be an influential figure in the investment community.