Westlake Chemical (WLK) - Market capitalization

Market cap: S$12.40 Billion

As of December 2025 Westlake Chemical has a market cap of S$12.40 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	S$12.40 B	-37.96%
2024	S$19.99 B	-15.59%
2023	S$23.68 B	35.1%
2022	S$17.53 B	4.45%
2021	S$16.78 B	21.73%
2020	S$13.78 B	13.55%
2019	S$12.14 B	4.55%
2018	S$11.61 B	-36.87%
2017	S$18.39 B	76.11%
2016	S$10.44 B	4.4%
2015	S$10.00 B	-6.73%
2014	S$10.72 B	4.04%
2013	S$10.31 B	58.91%
2012	S$6.48 B	86.93%
2011	S$3.47 B	-6.45%
2010	S$3.70 B	60.66%
2009	S$2.30 B	50.98%
2008	S$1.52 B	-14.53%
2007	S$1.78 B	-43.02%
2006	S$3.14 B	0.54%
2005	S$3.12 B	-11.66%
2004	S$3.53 B

End of Day market cap according to different sources

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

S$12.41 Billion

by Nasdaq

S$12.40 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Dow DOW	S$22.55 B	81.79%	🇺🇸 USA
Huntsman Corporation HUN	S$2.39 B	-80.67%	🇺🇸 USA
Eastman Chemical EMN	S$9.75 B	-21.33%	🇺🇸 USA
Albemarle ALB	S$20.44 B	64.83%	🇺🇸 USA
Celanese CE	S$6.04 B	-51.24%	🇺🇸 USA
Honeywell HON	S$168.61 B	1,259.28%	🇺🇸 USA
Olin OLN	S$3.30 B	-73.37%	🇺🇸 USA
Phillips 66 PSX	S$74.81 B	503.14%	🇺🇸 USA
Exxon Mobil XOM	S$657.80 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: S$12.40 Billion