Amazon's Making It Tough To Be A Costco Shareholder By: Benzinga via Benzinga July 21, 2017 at 11:57 AM EDT Originally published onFinbox.io. Amazon Inc.'s (NASDAQ: AMZN) purchase of Whole Foods Markets, Inc. (NASDAQ: WFM) has rocked ... Read More >> Related Stocks: Amazon.com CVS Health Corp Costco Wholesale Target Corp Wal-Mart Stores, Inc. Walgreens Boots Alliance Whole Foods Market