Market capitalization of Costco (COST)

Market cap: €346.14 Billion

As of September 2026 Costco has a market cap of €346.14 Billion. This makes Costco the world's 35th 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.

Market cap history of Costco from 1996 to 2026

End of year Market Cap

Year	Marketcap	Change
2026	€346.14 B	4.87%
2025	€330.05 B	-17.66%
2024	€400.85 B	51.29%
2023	€264.95 B	40.27%
2022	€188.88 B	-15.02%
2021	€222.28 B	63.82%
2020	€135.68 B	17.07%
2019	€115.90 B	47.77%
2018	€78.43 B	15.16%
2017	€68.11 B	1.87%
2016	€66.86 B	2.93%
2015	€64.95 B	26.52%
2014	€51.34 B	35.48%
2013	€37.89 B	16.55%
2012	€32.51 B	16.52%
2011	€27.90 B	17.75%
2010	€23.69 B	30.61%
2009	€18.14 B	11.52%
2008	€16.26 B	-21.67%
2007	€20.77 B	14.61%
2006	€18.12 B	-8.28%
2005	€19.75 B	17.21%
2004	€16.85 B	24.62%
2003	€13.52 B	10.57%
2002	€12.23 B	-46.18%
2001	€22.73 B	19.68%
2000	€18.99 B	-5.71%
1999	€20.14 B	51.77%
1998	€13.27 B	64.74%
1997	€8.05 B	93.52%
1996	€4.16 B

End of Day market cap according to different sources

On Sep 14th, 2026 the market cap of Costco was reported to be:

€353.15 Billion

by Nasdaq

€353.15 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Walmart WMT	€744.54 B	115.09%	🇺🇸 USA
Dollar General DG	€23.93 B	-93.09%	🇺🇸 USA
Dollar Tree DLTR	€18.26 B	-94.72%	🇺🇸 USA
Target TGT	€60.76 B	-82.44%	🇺🇸 USA
PriceSmart PSMT	€4.48 B	-98.70%	🇺🇸 USA
Five Below FIVE	€11.20 B	-96.76%	🇺🇸 USA
Big Lots BIG	€12.77 M	-100.00%	🇺🇸 USA

What is the market capitalization of a company?

The market capitalization sometimes referred as Marketcap, is the value of a publicly listed company.
In most cases it can be easily calculated by multiplying the share price with the amount of outstanding shares.

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