Benzinga's Top #PreMarket Gainers By: Benzinga via Benzinga May 09, 2014 at 08:14 AM EDT Horizon Pharma (NASDAQ: HZNP) shares climbed 7.95% to $14.25 in the pre-market trading session after the company reported upbeat Q1 ... Read More >> Related Stocks: Ballard Power Sys Gap Interpublic GroupCompanies Omnicom Group