Costco Wholesale Corp.

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, Sweden, Iceland, and New Zealand. Costco operated 939, 914, and 890 warehouses worldwide at August 30, 2026, August 31, 2025, and September 1, 2024. The Company operates e-commerce sites in the U.S., Canada, Mexico, the U.K., Korea, Taiwan, Japan, Australia, and China. Our common stock trades on the NASDAQ Global Select Market, under the symbol COST. We report on a 52/53-week fiscal year, consisting of thirteen four-week periods and ending on the Sunday nearest the end of August. The first three quarters consist of three periods each, and the fourth quarter consists of four periods (five weeks in the thirteenth period in a 53-week year). The material seasonal impact in our operations is increased net sales and earnings during the winter holiday season. References to 2026, 2025, and 2024 relate to the 52-week fiscal years ended August 30, 2026, August 31, 2025, and September 1, 2024. General We operate membership warehouses and e-commerce sites based on the concept that offering low prices on a limited selection of nationally-branded and private-label products in a wide range of categories will produce high sales volumes and rapid inventory turnover.