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 stock gained a second straight day as Bill Ackman said he had built a stake worth more than $2 billion. Freyr announced ...

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 ...

Billionaire hedge fund manager Bill Ackman revealed on Friday that his activist investment firm has bought up approximately ...

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

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 ...

Plus, the food conglomerate owner of Krispy Kreme buys an insurance company and a distressed-debt battle in Japan ...

UnitedHealth shares fell more than 4% on Wednesday before finishing down 1%, a day after hedge-fund manager Bill Ackman wrote a post on social media that said the insurer could be overstating its ...

UnitedHealth has reached out to the U.S. Securities and Exchange Commission about billionaire investor Bill Ackman's ...

Trump administration dialed back its Gaza proposal after global backlash. US not committing troops or funds. Proposal complicates peace talks.