William Ackman

About William Ackman

Bill Ackman founded and runs Pershing Square Capital Management, a hedge fund with $16 billion in assets under management.

Ackman created Pershing Square in 2004 and rose to fame for his short of bond insurer MBIA and his rescue of mall operator General Growth.

Pershing Square's stock portfolio is concentrated in just seven companies, including Chipotle, Hilton and Google parent Alphabet.

Ackman is outspoken with more than 1 million followers on X, where he often supports polarizing figures like Vivek Ramaswamy and Robert F. Kennedy.

He publicly pressured Harvard to oust president Claudine Gay amid accusations of plagiarism and antisemitism until she resigned in January 2024.