Westlake Chemical (WLK) - Market capitalization

Market cap: A$14.41 Billion

As of December 2025 Westlake Chemical has a market cap of A$14.41 Billion. This makes Westlake Chemical the world's 2017th 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 Westlake Chemical from 2004 to 2025

End of year Market Cap

Year	Marketcap	Change
2025	A$14.41 B	-39.03%
2024	A$23.64 B	-10.17%
2023	A$26.32 B	36.98%
2022	A$19.21 B	12.22%
2021	A$17.12 B	26.35%
2020	A$13.55 B	5.37%
2019	A$12.86 B	6.6%
2018	A$12.06 B	-31.51%
2017	A$17.61 B	75.95%
2016	A$10.01 B	3.12%
2015	A$9.70 B	-2.12%
2014	A$9.91 B	8.73%
2013	A$9.12 B	78.7%
2012	A$5.10 B	95.32%
2011	A$2.61 B	-7.81%
2010	A$2.83 B	54.85%
2009	A$1.83 B	20.79%
2008	A$1.51 B	6.57%
2007	A$1.42 B	-45.25%
2006	A$2.59 B	1.33%
2005	A$2.56 B	-8.46%
2004	A$2.80 B

End of Day market cap according to different sources

On Dec 11th, 2025 the market cap of Westlake Chemical was reported to be:

A$14.42 Billion

by Nasdaq

A$14.41 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Dow DOW	A$26.20 B	81.79%	🇺🇸 USA
Huntsman Corporation HUN	A$2.78 B	-80.67%	🇺🇸 USA
Eastman Chemical EMN	A$11.34 B	-21.33%	🇺🇸 USA
Albemarle ALB	A$23.76 B	64.83%	🇺🇸 USA
Celanese CE	A$7.02 B	-51.24%	🇺🇸 USA
Honeywell HON	A$195.97 B	1,259.28%	🇺🇸 USA
Olin OLN	A$3.83 B	-73.37%	🇺🇸 USA
Phillips 66 PSX	A$86.95 B	503.14%	🇺🇸 USA
Exxon Mobil XOM	A$764.54 B	5,202.98%	🇺🇸 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 Westlake Chemical (WLK)

Market cap: A$14.41 Billion