Costco Wholesale Corporation reported sales results for the month, five weeks and eighteen weeks ended January 4, 2015. For the month, the company reported net sales of $12.12 billion.

For the five weeks ended January 4, 2015, the company reported an increase of 5% net sales from $11.53 billion during the similar period last year.

For the eighteen weeks ended January 4, 2015, the company reported net sales of $40.85 billion, an increase of 7% from $38.33 billion during the similar period last year.