The Unstoppable Billionaire: Bill Ackman's Quest to Revive the American Dream Bill Ackman, founder of Pershing Square, has built a reputation as a shrewd investor and advocate for free market ideals.
However, his recent foray into culture war combat has raised eyebrows, sparking debate about the limits of corporate influence in public life.
Ackman's rise to prominence began in the 2000s with bold bets as a short seller and activist investor.