Why Cowen Thinks Allergan Has Massive Upside To $400 By: Benzinga via Benzinga September 29, 2015 at 10:29 AM EDT The share price of Allergan PLC (NYSE: AGN) has declined 17.25 percent over the past month, after having reached a high of ... Read More >> Related Stocks: Allergan Plc Teva Pharmaceutical Industries ADR