Early movers: X, MLM, GM, SNE, BA, APP, SNE & more By: CNBC.com News June 30, 2014 at 07:34 AM EDT These are the stocks posting the largest moves before the bell. Read More >> Related Stocks: Boeing Co European Aeronautic ADR General Motors Gopro Inc Cl A Martin Marietta Materials Michael Kors Holdings Piper Jaffray Companies Sentinelone Inc Cl A Sony Corp Tiffany & Co United States Steel Corp Yahoo