Costco Wholesale (COST) Monthly Sales Update May 2026 summary

Financial performance highlights

• Net sales for May reached $24.01 billion, up 14.5% from $20.97 billion last year.

• Total company comparable sales rose 12.5%, with digitally enabled sales up 21.1%.

• Excluding gasoline and FX, total comparable sales increased 7.5% for May.

• Comp traffic grew 3.9% worldwide and 3.7% in the U.S.

• Average worldwide transaction rose 8.3%, or 4.0% excluding gas inflation and FX.

Regional and category performance

• U.S. regions with strongest comparable sales were Midwest, Southeast, and Northeast.

• Comparable sales for May rose 13.7% in the U.S., 9.2% in Canada, and 9.7% internationally.

• Internationally, Taiwan, Japan, and the U.K. led performance.

• Foods and sundries grew mid-single digits; fresh foods up high single digits.

• Ancillary business sales surged high 30s, with gas up high 40s due to price and volume growth.

Operational highlights

• Operates 931 warehouses globally, with 639 in the U.S. and Puerto Rico.

• E-commerce platforms are active in nine countries, including the U.S., Canada, and China.