Westlake Chemical (WLK) - Market capitalization

Market cap: £7.11 Billion

As of December 2025 Westlake Chemical has a market cap of £7.11 Billion. This makes Westlake Chemical the world's 2013th 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	£7.11 B	-39.33%
2024	£11.72 B	-16.74%
2023	£14.07 B	30.23%
2022	£10.80 B	17.53%
2021	£9.19 B	20.29%
2020	£7.64 B	11.33%
2019	£6.86 B	2.56%
2018	£6.69 B	-34.19%
2017	£10.17 B	73.99%
2016	£5.84 B	22.54%
2015	£4.77 B	-8.46%
2014	£5.21 B	5.7%
2013	£4.93 B	50.3%
2012	£3.28 B	90.36%
2011	£1.72 B	-7.58%
2010	£1.86 B	83.55%
2009	£1.01 B	39.29%
2008	£0.72 B	16.57%
2007	£0.62 B	-40.13%
2006	£1.04 B	-3.89%
2005	£1.08 B	-3.64%
2004	£1.12 B

End of Day market cap according to different sources

On Dec 10th, 2025 the market cap of Westlake Chemical was reported to be:

£6.94 Billion

by Nasdaq

£6.95 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Dow DOW	£13.16 B	85.06%	🇺🇸 USA
Huntsman Corporation HUN	£1.42 B	-79.91%	🇺🇸 USA
Eastman Chemical EMN	£5.61 B	-21.05%	🇺🇸 USA
Albemarle ALB	£11.76 B	65.48%	🇺🇸 USA
Celanese CE	£3.53 B	-50.36%	🇺🇸 USA
Honeywell HON	£97.35 B	1,269.00%	🇺🇸 USA
Olin OLN	£1.87 B	-73.57%	🇺🇸 USA
Phillips 66 PSX	£42.81 B	502.04%	🇺🇸 USA
Exxon Mobil XOM	£378.98 B	5,229.37%	🇺🇸 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: £7.11 Billion