Costco Wholesale Corporation reported sales results for the five weeks and eighteen weeks ended January 3, 2021. The company reported net sales of $19.14 billion for the retail month of December, an increase of 12.3% from $17.04 billion last year. For the 18 weeks ended January 3, 2021, the company reported net sales of $65.47 billion, an increase of 14.9% from $56.99 billion during the similar period last year.