Billionaire Bill Ackman Has 58% of His Hedge Fund's $13.8 Billion Portfolio Invested in Just 3 Companies

Ackman made a couple of big moves in Pershing Square's portfolio.Bill Ackman is one of the most closely followed investment managers on Wall Street. His Pershing Square Capital Management hedge fund holds just a handful of high-conviction positions, and he typically holds those positions for the long run.Ackman is often forthcoming with the biggest moves in his portfolio. He'll usually disclose new trades through his social media accounts or monthly updates to his hedge fund investors. But Pershing Square's ...