Modified

Costco Wholesale Corporation and its subsidiaries (Costco or the Company) began operations in 1983, in Seattle, Washington. We are principally engaged in the operation of membership warehouses in the United States (U.S.) and Puerto Rico, Canada, Mexico, Japan, the United Kingdom (U.K.), Korea, Australia, Taiwan, China, Spain, France, IcelandSweden, New ZealandIceland, and SwedenNew Zealand. Costco operated 890914, 861890, and 838861 warehouses worldwide at September 1August 31, 20242025, September 31, 20232024, and August 28September 3, 20222023. The Company operates e-commerce sites in the U.S., Canada, Mexico, the U.K., Korea, Taiwan, Japan, and Australia. Our common stock trades on the NASDAQ Global Select Market, under the symbol “COST.”