Benzinga's Top #PreMarket Losers By: Benzinga via Benzinga November 20, 2015 at 08:17 AM EST Mentor Graphics Corp (NASDAQ: MENT) fell 28.04 percent to $19.99 in pre-market trading after the company reported downbeat Q3 earnings ... Read More >> Related Stocks: Biomarin Pharmaceuticals Builders Firstsource Depomed Inc Horizon Therapeutics