Bill Ackman's Latest Moves In Health Care & Some Other Positions From Q1 By: Benzinga via Benzinga May 16, 2015 at 09:54 AM EDT Bill Ackman’s Pershing Square Capital Management’s equity portfolio continues to be highly concentrated, comprising only ... Read More >> Related Stocks: Actavis Plc Air Products & Chemicals Canadian Pacific Railway Limited Valeant Pharmaceuticals International, Inc. Zoetis