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Bill Ackman

William Albert Ackman (born May 11, 1966) is an American billionaire hedge fund manager who is the founder and chief executive of Pershing Square Capital Management, an investment management company. He has been described as an activist investor. As of April 2026, Ackman's net worth was estimated at $8 billion by Bloomberg.

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Ira Rennert

Ira Leon Rennert (born May 31, 1934) is an American billionaire businessman, and the chairman and CEO of Renco Group. As of November 2024, Forbes estimated his net worth at US$3.8 billion.