Costco Wholesale Corp. shares are up 2.5% in Thursday premarket trading after the company reported June sales of $12.17 billion, up 7% from $11.33 billion the year before. Same-store sales for the five weeks ending July 2 were up 6% in total, and 6.5% in the U.S. For the 44 weeks ending July 2, sales were $104.28 billion, up 6% from $98.51 billion year over year. Costco's stock is down 1.3% for the year so far while the S&P 500 index is up 8.7% for the period.
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