Bill Ackman is one of the most widely followed investment managers in the world. He's in charge of Pershing Square Capital, a ...

The insurer and its law firm denies a doctor’s online claim that it refused to cover care for a cancer patient.

Bill Ackman, the head of Pershing Square Capital Management, posted on X that the government should carefully review U.S. support for the United Nations.

Two months after UnitedHealthcare CEO Brian Thompson was killed, the insurer's parent company is going after people who say ...

In the aftermath of its CEO's stunning assassination, UnitedHealthcare is now doubling down and threatening legal retaliation ...

Uber’s stock extends its surge as hedge funder Ackman says he’s amassed a 30.3-million-share stake since early January.

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

With Bill Ackman's posts, one of the world’s most prominent investors is intensifying a dispute between a doctor and ...

Amazon falls after guidance disappoints and cloud-computing growth misses estimates, Affirm jumps after fiscal second-quarter earnings beat analysts’ forecasts, and Pinterest soars after posting its ...

Billionaire investor Bill Ackman pledged to cover the legal fees for a Texas doctor in a dispute with UnitedHealth Group Inc.

Pershing Square Capital Management Chief Executive Officer Bill Ackman said he took down a critical post about UnitedHealth Group Inc. after the company’s lawyers told him the claims about the company ...

Former bond king Bill Gross says that the hot energy pipeline stocks “‘seem to be topping” after a big run and that he has ...