Ackman Boosts Stake In Valeant; Still Appears To Be Passive By: Benzinga via Benzinga March 25, 2015 at 15:28 PM EDT Hedge fund billionaire Bill Ackman is increasingly bullish on Valeant Pharmaceuticals Intl Inc (NYSE: VRX). His firm, Pershing ... Read More >> Related Stocks: Valeant Pharmaceuticals International, Inc.