Pershing Square Capital Management (NYSE: PS), headed by Bill Ackman, has become one of the key investment funds whose moves investors watch.
Pershing is vastly smaller than Berkshire Hathaway (NYSE: BRK.B) in terms of assets. The firm ended Q1 2026 with around $13.7 billion in public equity investments, but a fraction of Berkshire’s $263 billion. Furthermore, Berkshire has around $397 billion in cash sitting on the sidelines.