Pinterest’s global monthly active users reached an all-time high of 553 million in the fourth quarter, an increase of 11% ...

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 ...

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 ...