Benzinga's Top #PreMarket Gainers By: Benzinga via Benzinga September 23, 2015 at 08:14 AM EDT HORSEHEAD HOLDING CORP. (NASDAQ: ZINC) shares rose 6.31 percent to $4.38 in pre-market trading after dropping 18.25 percent on ... Read More >> Related Stocks: Barrick Gold Corp Citrix Systems Conatus Pharmaceutic Yandex Ord Shs Class A