UnitedHealth Group said on Wednesday a mistake at the hospital was behind the phone call that led to a surgeon being pulled from the operating room to defend a patient's inpatient stay, a move that was eventually criticized by billionaire Bill Ackman.

Big names like Tesla and Dropbox have already left, and Meta is looking to do the same.

The hedge fund manager is waging his own money this time in a bid to build another financial behemoth that can rival the life's work of Warren Buffett.

Bill Ackman's Pershing Square proposed to acquire 10 million newly issued Howard Hughes shares at $90 per share — up from $85 per share earlier.

Billionaire investor William Ackman increased his stake in sportswear company Nike by 15% and cut his investment in fast-casual food chain Chipotle Mexican Grill by 14%, during the fourth quarter, according to a regulatory filing made on Friday.

Ackman just submitted a revised proposal for Howard Hughes Holdings. A few weeks ago, Bill Ackman submitted a proposal to acquire a majority stake in Howard Hughes Holdings ( HHH -0.93%) with the goal of building it into a "modern-day Berkshire Hathaway ( BRK.

Uber is an attractive growth investment opportunity in the vehicles and parts sector and recently received backing by Bill Ackman.

Bill Ackman is the founder and CEO of Pershing Square, a hedge fund with around $12.9 billion in assets under management. That includes billions of dollars invested in popular sto

Billionaire hedge fund manager Bill Ackman recently revealed his latest multibillion-dollar investment: mobility technology leader Uber (UBER -2.14%). According to a social media

Bill Ackman announced that his fund had opened a position in Uber. The billionaire called it one of the highest-quality businesses in the world. The company has come a long way since its earlier struggles.

Major hedge fund manager Bill Ackman announced a big stake in Uber last Friday. The stock rocketed on the news. However, there are several risks in Uber's stock to consider before buying. Last week, the stock of Uber Technologies went on a wild ride,