Costco Wholesale Corporation reported sales results for the five weeks and year to date ended January 4, 2026. The company reported net sales of $29.86 billion for the retail month of December, the five weeks ended January 4, 2026, an increase of 8.5% from $27.52 billion last year.

Net sales for the first eighteen weeks were $101.83 billion, an increase of 8.3% from $94.04 billion last year.