American Electric Power (AEP) - Market capitalization

Market cap: £45.67 Billion

As of December 2025 American Electric Power has a market cap of £45.67 Billion. This makes American Electric Power the world's 367th 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 American Electric Power from 1996 to 2025

End of year Market Cap

Year	Marketcap	Change
2025	£45.67 B	16.33%
2024	£39.25 B	17.1%
2023	£33.52 B	-16.87%
2022	£40.33 B	23.27%
2021	£32.71 B	7.89%
2020	£30.32 B	-14.86%
2019	£35.61 B	22.64%
2018	£29.04 B	8.44%
2017	£26.78 B	6.75%
2016	£25.08 B	29.94%
2015	£19.30 B	1.16%
2014	£19.08 B	38.1%
2013	£13.82 B	7.77%
2012	£12.82 B	-0.08%
2011	£12.83 B	14.53%
2010	£11.20 B	9.04%
2009	£10.27 B	11.46%
2008	£9.22 B	-1.75%
2007	£9.38 B	8.83%
2006	£8.62 B	1.83%
2005	£8.46 B	19.59%
2004	£7.08 B	4.82%
2003	£6.75 B	16.96%
2002	£5.77 B	-40.3%
2001	£9.67 B	-3.57%
2000	£10.03 B	159.98%
1999	£3.85 B	-28.92%
1998	£5.42 B	-9.07%
1997	£5.97 B	32.07%
1996	£4.52 B

End of Day market cap according to different sources

On Dec 10th, 2025 the market cap of American Electric Power was reported to be:

£45.67 Billion

by Nasdaq

£45.67 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Duke Energy DUK	£66.26 B	45.08%	🇺🇸 USA
PPL PPL	£18.38 B	-59.74%	🇺🇸 USA
Entergy ETR	£31.15 B	-31.79%	🇺🇸 USA
Dominion Energy D	£37.05 B	-18.87%	🇺🇸 USA
NRG Energy NRG	£24.31 B	-46.77%	🇺🇸 USA
Exelon Corporation EXC	£32.67 B	-28.46%	🇺🇸 USA
AES AES	£7.34 B	-83.92%	🇺🇸 USA
Southern Company SO	£69.19 B	51.51%	🇺🇸 USA
FirstEnergy FE	£19.17 B	-58.03%	🇺🇸 USA
Xcel Energy XEL	£32.99 B	-27.76%	🇺🇸 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 American Electric Power (AEP)

Market cap: £45.67 Billion