Costco (COST) - Market capitalization

Market cap: C$585.87 Billion

As of January 2026 Costco has a market cap of C$585.87 Billion. This makes Costco the world's 23th 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	C$585.87 B	10.34%
2025	C$530.98 B	-11.29%
2024	C$598.57 B	54.08%
2023	C$388.48 B	41.3%
2022	C$274.93 B	-14.3%
2021	C$320.82 B	50.76%
2020	C$212.80 B	25.49%
2019	C$169.58 B	38.74%
2018	C$122.23 B	18.96%
2017	C$102.75 B	8.72%
2016	C$94.50 B	-4.08%
2015	C$98.52 B	35.97%
2014	C$72.46 B	30.07%
2013	C$55.71 B	30.26%
2012	C$42.76 B	16.03%
2011	C$36.86 B	16.99%
2010	C$31.50 B	15.2%
2009	C$27.35 B	-1.1%
2008	C$27.65 B	-8.59%
2007	C$30.25 B	8.67%
2006	C$27.84 B	2.17%
2005	C$27.25 B	-0.79%
2004	C$27.46 B	24.33%
2003	C$22.09 B	9.37%
2002	C$20.20 B	-36.85%
2001	C$31.98 B	19.3%
2000	C$26.81 B	-8.3%
1999	C$29.24 B	20.73%
1998	C$24.21 B	77.27%
1997	C$13.66 B	101.87%
1996	C$6.76 B

End of Day market cap according to different sources

On Jan 13th, 2026 the market cap of Costco was reported to be:

C$580.20 Billion

by Nasdaq

C$580.31 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
PriceSmart PSMT	C$6.02 B	-98.97%	🇺🇸 USA
Walmart WMT	C$1.326 T	126.44%	🇺🇸 USA
Target TGT	C$69.11 B	-88.20%	🇺🇸 USA
Dollar General DG	C$46.41 B	-92.08%	🇺🇸 USA
Dollar Tree DLTR	C$39.60 B	-93.24%	🇺🇸 USA
Big Lots BIG	C$20.46 M	-100.00%	🇺🇸 USA
Five Below FIVE	C$15.18 B	-97.41%	🇺🇸 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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Market capitalization of Costco (COST)

Market cap: C$585.87 Billion