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Bill Ackman is one of the most widely followed investment managers in the world. He's in charge of Pershing Square Capital, a hedge fund focused on investing in just a handful of Ackman's best ideas. His highly concentrated portfolio is full of great companies, but he might have just made one stock the biggest holding at Pershing Square.

Bill Ackman has amassed a roughly $2.3 billion stake in Uber, saying in a post on X that the ride-hailing company's stock is undervalued. Ackman said Friday in the post that his Pershing Square invest

Bill Ackman is one of the most closely followed investment personalities on Wall Street. As CEO of hedge fund Pershing Square Capital Management, Ackman has been at the center of some creatively structured investments in recent history.

Uber’s stock extends its surge as hedge funder Ackman says he’s amassed a 30.3-million-share stake since early January.

Uber (NYSE: UBER) got a huge new investor last week when hedge fund manager Bill Ackman announced a $2.3 billion stake in the company. Ackman is known as a long-term investor willing to bet big on concentrated ideas,

Bill Ackman’s Pershing Square invests in Uber, citing undervaluation and growth potential. Read what makes UBER stock an attractive investment.