Billionaire investor Bill Ackman is once again flexing his political muscle — this time by publicly touting the New York mayoral candidacy of former hedge fund manager Whitney Tilson because ...

Billionaire Bill Ackman disclosed Friday his hedge fund made a major bet on ride hailing giant Uber, helping boost shares of the San Francisco-based company to their highest level in months as ...

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 ...

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 ...

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 ...