SEATTLE--(BUSINESS WIRE)--Amazon.com, Inc. (NASDAQ: AMZN) today announced financial results for its first quarter ended March 31, 2015. Operating cash flow increased 47% to $7.84 billion for the trailing twelve months, compared with $5.35 billion for the trailing twelve months ended March 31, 2014. Free cash flow increased to $3.16 billion for the trailing twelve months, compared with $1.49 billion for the trailing twelve months ended March 31, 2014. Common shares outstanding plus shares underl