Benzinga's Top #PreMarket Gainers By: Benzinga via Benzinga May 13, 2015 at 08:13 AM EDT Hortonworks Inc (NASDAQ: HDP) shares surged 11.52 percent to $24.30 in pre-market trading after the company reported a ... Read More >> Related Stocks: Danaher Corp Hortonworks Pall Corp Spectrum Pharma Inc Vertex Pharmaceuticals