Early movers: MYL, LMT, GD, GPOR, AMZN, WMT, PBR & more By: CNBC.com News December 30, 2016 at 07:44 AM EST These are the stocks posting the largest moves before the bell. Read More >> Related Stocks: Amazon.com Apple Charter Communications Inc Comcast Corp Genl Dynamics Gulfport Energy Corp Johnson & Johnson Lockheed Martin Mylan Qualcomm, Inc. Sentinelone Inc Cl A T-Mobile US Wal-Mart Stores, Inc.