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Key Points Hedge fund billionaire Bill Ackman hopes to recreate Warren Buffett's success by turning Howard Hughes into a "modern-day Berkshire Hathaway."Ackman's hedge fund took a stake in Amazon ...

Fact checked by Vikki Velasquez New ETFs are taking Wall Street's obsession with tracking star investors like Cathie Wood, Bill Ackman, and Warren Buffett one step further—offering funds that aim to ...

As a case in point, Warren Buffett, Bill Ackman, and David Tepper have portfolios that look very different. But there's one stock -- and only one stock -- that all three of these billionaires own.

The Motley Fool has positions in and recommends Berkshire Hathaway, Brookfield, Brookfield Corporation, Howard Hughes, and Uber Technologies. The Motley Fool has a disclosure policy.

Image source: Getty Images. Bill Ackman's stock portfolio Bill Ackman manages the Pershing Square Capital Management hedge fund, which has roughly $12 billion worth of stocks in its portfolio.