Bill Ackman runs Pershing Square Capital, a hedge fund with several highly concentrated bets. Based on its most recent portfolio disclosure, Ackman's newest position could be his largest.

Bill Ackman, the billionaire hedge fund manager and CEO of Pershing Square Capital Management.Adam Jeffery/CNBC via Getty Images Billionaire hedge fund manager Bill Ackman says he is moving his ...

Billionaire hedge fund manager Bill Ackman on Monday questioned U.S. funding of the United Nations, saying it "deserves careful scrutiny." "The more I learn about the @UN, one of the largest ...

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.

Billionaire Bill Ackman has accumulated $2 billion in Uber stock in his Pershing Square hedge fund since early January. Uber's strong presence in ride-sharing and food delivery creates adjacent ...

Billionaire hedge fund manager Bill Ackman revealed on Friday that his activist investment firm has bought up approximately $2 billion worth of shares of Uber — sending the ride-share company ...

Bill Ackman put pressure on one of the largest companies in the world with a tweet that he later deleted. Here's a look at what Ackman said about UnitedHealth Group. Brand New Membership Level ...

Billionaire investor Bill Ackman sparked a sell-off in UnitedHealth (UNH) shares on Wednesday after suggesting on X that the health insurer’s profitability may be “massively overstated” due ...

Billionaire investor Bill Ackman pledged to cover the legal fees for a Texas doctor in a dispute with UnitedHealth Group Inc. over her claims that the company asked her to scrub out of an ...

UnitedHealth (NYSE:UNH) has contacted the US Securities and Exchange Commission about its issues with hedge fund investor Bill Ackman's since-deleted post on X about the insurer's earnings.