Owens Corning (OC) - Market capitalization

Market cap: C$13.64 Billion

As of February 2026 Owens Corning has a market cap of C$13.64 Billion. This makes Owens Corning the world's 2003th 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 Owens Corning from 2006 to 2026

End of year Market Cap

Year	Marketcap	Change
2026	C$13.64 B	4.73%
2025	C$13.02 B	-37.97%
2024	C$20.99 B	20.17%
2023	C$17.47 B	59.78%
2022	C$10.93 B	-5.64%
2021	C$11.58 B	10.85%
2020	C$10.45 B	12.78%
2019	C$9.27 B	41.32%
2018	C$6.56 B	-48.98%
2017	C$12.85 B	63.76%
2016	C$7.85 B	3.85%
2015	C$7.56 B	54.46%
2014	C$4.89 B	-4.13%
2013	C$5.10 B	17.35%
2012	C$4.35 B	23.22%
2011	C$3.53 B	-8.61%
2010	C$3.86 B	12.08%
2009	C$3.44 B	27.85%
2008	C$2.69 B	1.54%
2007	C$2.65 B	-41.72%
2006	C$4.55 B

End of Day market cap according to different sources

On Jan 31st, 2026 the market cap of Owens Corning was reported to be:

C$13.40 Billion

by Nasdaq

C$13.64 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Corning GLW	C$120.50 B	783.29%	🇺🇸 USA
Dow DOW	C$26.89 B	97.16%	🇺🇸 USA
Masco MAS	C$18.83 B	38.07%	🇺🇸 USA
PPG Industries PPG	C$35.52 B	160.41%	🇺🇸 USA
Patrick Industries PATK	C$5.71 B	-58.10%	🇺🇸 USA
Louisiana-Pacific LPX	C$7.93 B	-41.81%	🇺🇸 USA
Aspen Aerogels ASPN	C$0.37 B	-97.22%	🇺🇸 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 Owens Corning (OC)

Market cap: C$13.64 Billion