Westlake Chemical (WLK) - Market capitalization

Market cap: HK$73.82 Billion

As of December 2025 Westlake Chemical has a market cap of HK$73.82 Billion. This makes Westlake Chemical the world's 1998th 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	HK$73.82 B	-35.35%
2024	HK$114.18 B	-18.48%
2023	HK$140.07 B	37.08%
2022	HK$102.17 B	5.55%
2021	HK$96.80 B	19.82%
2020	HK$80.79 B	15.19%
2019	HK$70.14 B	5.37%
2018	HK$66.56 B	-38.05%
2017	HK$107.45 B	92%
2016	HK$55.96 B	2.08%
2015	HK$54.82 B	-12.94%
2014	HK$62.96 B	-0.21%
2013	HK$63.10 B	53.45%
2012	HK$41.12 B	97.56%
2011	HK$20.81 B	-7.13%
2010	HK$22.41 B	75.74%
2009	HK$12.75 B	54.32%
2008	HK$8.26 B	-14.76%
2007	HK$9.69 B	-39.13%
2006	HK$15.92 B	9.51%
2005	HK$14.54 B	-13.64%
2004	HK$16.84 B

End of Day market cap according to different sources

On Dec 17th, 2025 the market cap of Westlake Chemical was reported to be:

HK$73.76 Billion

by Nasdaq

HK$73.82 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Dow DOW	HK$127.57 B	72.79%	🇺🇸 USA
Huntsman Corporation HUN	HK$13.62 B	-81.54%	🇺🇸 USA
Eastman Chemical EMN	HK$57.11 B	-22.64%	🇺🇸 USA
Albemarle ALB	HK$123.35 B	67.08%	🇺🇸 USA
Celanese CE	HK$35.41 B	-52.03%	🇺🇸 USA
Honeywell HON	HK$1.047 T	1,319.44%	🇺🇸 USA
Olin OLN	HK$18.11 B	-75.46%	🇺🇸 USA
Phillips 66 PSX	HK$414.98 B	462.09%	🇺🇸 USA
Exxon Mobil XOM	HK$3.894 T	5,174.67%	🇺🇸 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: HK$73.82 Billion