Costain Group (COST.L) - Market capitalization

Market cap: £0.29 Billion

As of April 2025 Costain Group has a market cap of £0.29 Billion. This makes Costain Group the world's 7151th 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 Costain Group from 1996 to 2025

End of year Market Cap

Year	Marketcap	Change
2025	£0.29 B	0.59%
2024	£0.29 B	65.67%
2023	£0.17 B	61.97%
2022	£0.10 B	-26.23%
2021	£0.14 B	-9.8%
2020	£0.16 B	-5.7%
2019	£0.17 B	-48.88%
2018	£0.33 B	-31.6%
2017	£0.49 B	33.92%
2016	£0.36 B	-3.34%
2015	£0.38 B	34.7%
2014	£0.28 B	53.02%
2013	£0.18 B	11.13%
2012	£0.16 B	39.27%
2011	£0.11 B	-11.18%
2010	£0.13 B	-12.5%
2009	£0.15 B	22.96%
2008	£0.12 B	-26.32%
2007	£0.16 B	-6.8%
2006	£0.18 B	18.97%
2005	£0.15 B	-6.74%
2004	£0.16 B	26.87%
2003	£0.12 B	58.31%
2002	£81.75 M	83.02%
2001	£44.67 M	20.45%
2000	£37.08 M	-31.25%
1999	£53.94 M	-8.57%
1998	£58.99 M	-18.6%
1997	£72.48 M	-23.93%
1996	£95.28 M

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 Costain Group (COST.L)

Market cap: £0.29 Billion