Benzinga's Top #PreMarket Gainers By: Benzinga via Benzinga April 22, 2014 at 08:09 AM EDT Allergan (NYSE: AGN) shares gained 19.72% to $170.00 in the pre-market on buyout offer. Valeant Pharmaceuticals International (NYSE: ... Read More >> Related Stocks: Harley-Davidson Netflix Valeant Pharmaceuticals International, Inc.