Bill Ackman is going to want some answers from his largest holding, Valeant Pharmaceuticals, after its latest conference call turned into another disaster for the stock. A day ahead of Valeant's ...

Bill Ackman, the billionaire founder of Pershing Square Capital, spent nearly four hours hosting a call defending his massive investment in Valeant Pharmaceuticals. Ackman has lost more than $1 ...

A $55 billion hostile takeover bid from Canada-based competitor Valeant and hedge fund manager Bill Ackman has turned into an ugly battle. A recent overture from a potential white knight may save ...