Costco Wholesale Corporation is an American wholesale chain with headquarters in Issaquah near Seattle, Washington State.
As of April 2026 Costco has a market cap of โฌ375.92 Billion. This makes Costco the world's 26th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.
On Apr 19th, 2026 the market cap of Costco was reported to be: