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 ...

Hedge fund billionaire Bill Ackman, founder of $12 ... far this year have been mostly dragged down by Valeant Pharmaceuticals' massive decline. Ackman is the largest hedge fund shareholder with ...

Bill Ackman is the founder and CEO of Pershing Square ... alleging that Pershing along with Valeant Pharmaceuticals had improperly traded before their 2014 takeover attempt of Allergan.

(Bloomberg) -- Bill Ackman had taken to X again ... His latest trouble is nothing next to beatings he took on Herbalife Ltd. and Valeant Pharmaceuticals, but it comes at a time when he’s ...

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 ...