GrubHub Sees Volatility After Amazon Launches Competing Service By: Benzinga via Benzinga December 03, 2014 at 15:12 PM EST GrubHub Inc(NYSE: GRUB) experienced volatility Wednesday following news that Amazon.com, Inc. (NASDAQ: AMZN) had launched a ... Read More >> Related Stocks: Amazon.com Grubhub Ord Shs