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,

Uber stock hit its highest level since October after Ackman disclosed his Pershing Square hedge fund accumulated a 1.4% stake in the ride hailer.

Go big or go home. Billionaire investor Bill Ackman of Pershing Square Capital Management takes that sentiment to heart. His hedge fund has some $13 billion in assets under management, but he owns just 10 stocks (track his portfolio here),

Last week, the stock of Uber Technologies went on a wild ride, falling hard after Uber reported earnings on Feb. 5, only to rocket higher toward the end of the week. On earnings, while revenue and earnings per share actually beat expectations,

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