UPDATE 3-Ackman, Valeant team up to bid for Allergan in unusual pairing By: Reuters: Company News April 21, 2014 at 20:39 PM EDT (Recasts with Ackman partnering with Valeant to buy Allergan) Read More >> Related Stocks: Air Products & Chemicals General Growth Properties Herbalife Ltd Royal Bank of Canada Valeant Pharmaceuticals International, Inc.