Bill Ackman Picks 4 New Stocks In 13F By: Benzinga via Benzinga May 16, 2014 at 15:15 PM EDT Hedge fund activist Bill Ackman expanded his portfolio to nine positions from seven the previous quarter. This does not include ... Read More >> Related Stocks: Apartment Investment & Mgmt General Growth Properties Herbalife Ltd Platform Specialty Products Corp Procter & Gamble