Costco Wholesale Corporation reported net sales of $26.15 billion for the retail month of December, an increase of 9.9 percent from $23.80 billion last year.

Sales were up 7.3 percent in the United States, 12.8 percent in Canada, and 10.5 percent in Other International. Excluding the impacts from changes in gasoline prices and foreign exchange, sales were up 8.1 percent, rising 7.4 percent in the U.S., 11.9 percent in Canada, and 8.1 percent in Other International.

E-commerce sales were up 17.7 percent on a reported basis and 17.4 percent on an adjusted basis.

For the seventeen weeks ended December 31, 2023, the company reported net sales of $82.86 billion, an increase of 5.9 percent from $78.26 billion for the seventeen weeks of fiscal year 2023 ended December 25, 2022. Net sales for the seventeen weeks were negatively impacted by approximately one-half to one percent from the shift of the fiscal calendar, as a result of the fifty-third week in fiscal year 2023.