Bill Ackman is an American hedge fund manager who is the founder and CEO of Pershing Square Capital Management. Occasionally, he appears on CNBC, the business news network. Ackman is a self-proclaimed activist investor.
He rose to fame with a high-profile short position in Herbalife (HLF), a company that sells nutrition solutions through independent sales representatives. Ackman argued that the company was a Ponzi scheme. In 2013, he feuded with Carl Icahn, another hedge fund manager who held an opposing position in Herbalife, on CNBC. In what turned out to be a zero-sum