Benzinga's Top #PreMarket Losers By: Benzinga via Benzinga January 06, 2016 at 08:22 AM EST Cempra Inc (NASDAQ: CEMP) fell 11.24 percent to $25.50 in pre-market trading on the announcement of proposed public offering of $175 ... Read More >> Related Stocks: Chesapeake Energy Otonomy Inc Pioneer Natural Resources Sonic Cp