Biggest Movers in Mining Stocks Now – SEMG SUM ATW CLF By: InvestorPlace February 16, 2016 at 11:15 AM EST Read More >> Related Stocks: Compania Mina Buenaventura S.A. ADR Eldorado Gold Corporation Hecla Mining Company Kinross Gold Corporation Laredo Petroleum Holdings Inc New Gold Precision Drilling Corp Pretium Res Inc Ring Energy Inc Semgroup Corp Southwestern Energy Summit Materials Inc Unit Corp