Billionaire Bill Ackman Just Invested 10% of Pershing Square Capital Management's $20 Billion Portfolio in 1 Unstoppable Artificial Intelligence (AI) Stock

Billionaire Bill Ackman is something of a legend in investing circles. The activist investor heads up Pershing Square Capital Management -- the hedge fund he founded -- with roughly $20 billion in assets under management. His strategy, which involves acquiring sizable positions in just a few stocks and holding them for years, has been remarkably successful. Pershing Square returned 34% in 2025, nearly double the performance of the S&P 500. That's not a one-off. Over the past eight years, Pershing has retu ...