Ameren (AEE) - Market capitalization

Market cap: £22.48 Billion

As of February 2026 Ameren has a market cap of £22.48 Billion. This makes Ameren the world's 816th 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 Ameren from 1997 to 2026

End of year Market Cap

Year	Marketcap	Change
2026	£22.48 B	12.15%
2025	£20.04 B	4.58%
2024	£19.16 B	28.39%
2023	£14.93 B	-21.42%
2022	£19.00 B	11.86%
2021	£16.98 B	19.99%
2020	£14.15 B	-1.82%
2019	£14.41 B	14.76%
2018	£12.56 B	18.64%
2017	£10.59 B	2.66%
2016	£10.31 B	45.76%
2015	£7.07 B	-1.54%
2014	£7.18 B	35.16%
2013	£5.31 B	15.34%
2012	£4.61 B	-10.7%
2011	£5.16 B	17.62%
2010	£4.38 B	7.06%
2009	£4.10 B	-14.89%
2008	£4.81 B	-15.24%
2007	£5.68 B	0.3%
2006	£5.66 B	-6.83%
2005	£6.08 B	19.31%
2004	£5.09 B	21.7%
2003	£4.18 B	4.85%
2002	£3.99 B	-0.8%
2001	£4.02 B	-5.41%
2000	£4.25 B	53.1%
1999	£2.78 B	-21.05%
1998	£3.52 B	-2.49%
1997	£3.61 B

End of Day market cap according to different sources

On Feb 22nd, 2026 the market cap of Ameren was reported to be:

£22.00 Billion

by Nasdaq

£22.48 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Alliant Energy LNT	£13.49 B	-39.99%	🇺🇸 USA
CMS Energy CMS	£17.18 B	-23.58%	🇺🇸 USA
Dominion Energy D	£41.63 B	85.17%	🇺🇸 USA
WEC Energy Group WEC	£27.50 B	22.34%	🇺🇸 USA
Duke Energy DUK	£72.87 B	224.13%	🇺🇸 USA
Xcel Energy XEL	£35.65 B	58.59%	🇺🇸 USA
Otter Tail OTTR	£2.63 B	-88.30%	🇺🇸 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 Ameren (AEE)

Market cap: £22.48 Billion