Ackman’s $2 billion Uber stake has sparked a close relationship with CEO Dara Khosrowshahi, who welcomes his feedback and long-term vision.

Billionaire Bill Ackman has invested $900 million to transform Howard Hughes Holdings into a "modern-day Berkshire Hathaway." Can his ambitious plan succeed despite skeptical investors, high capital ...

Hedge-fund billionaire Bill Ackman on Thursday urged President Trump and Elon Musk to stop fighting. The two men should “make ...

Bill Ackman asked Elon Musk and Donald Trump to stop fighting. Musk agreed with him. This happened after Trump and Musk got ...