A Look At Bill Ackman's Super-Concentrated Equity Portfolio By: Benzinga via Benzinga August 18, 2015 at 15:51 PM EDT Activist investor Bill Ackman manages Pershing Square Capital Management, a successful hedge fund firm with a concentrated equity ... Read More >> Related Stocks: Air Products & Chemicals Allergan Plc Canadian Pacific Railway Limited Howard Hughes Corp Platform Specialty Products Corp Restaurant Brands International Valeant Pharmaceuticals International, Inc. Zoetis