The Pershing Square CEO said he's admired the ridesharing giant since actor Edward Norton introduced him to the app in its early days.

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

Shares of Uber Technologies jumped to a three-month high on Friday after billionaire hedge fund manager Bill Ackman announced that he had taken a position in the ride sharing platform.