Alliant Energy (LNT) - Market capitalization

Market cap: £12.53 Billion

As of December 2025 Alliant Energy has a market cap of £12.53 Billion. This makes Alliant Energy the world's 1285th 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 Alliant Energy from 1996 to 2025

End of year Market Cap

Year	Marketcap	Change
2025	£12.53 B	2.95%
2024	£12.17 B	18.48%
2023	£10.27 B	-10.3%
2022	£11.45 B	0.48%
2021	£11.40 B	20.75%
2020	£9.44 B	-7.65%
2019	£10.22 B	30.13%
2018	£7.85 B	7.79%
2017	£7.28 B	4.34%
2016	£6.98 B	46.11%
2015	£4.78 B	1.03%
2014	£4.73 B	36.37%
2013	£3.47 B	15.1%
2012	£3.01 B	-4.27%
2011	£3.14 B	19.24%
2010	£2.64 B	27.65%
2009	£2.06 B	-5.9%
2008	£2.19 B	-2.72%
2007	£2.26 B	0.85%
2006	£2.24 B	17.77%
2005	£1.90 B	10.37%
2004	£1.72 B	11.63%
2003	£1.54 B	62.12%
2002	£0.95 B	-49.27%
2001	£1.87 B	11.29%
2000	£1.68 B	25.53%
1999	£1.34 B	-10.72%
1998	£1.50 B	142.51%
1997	£0.62 B	22.83%
1996	£0.50 B

End of Day market cap according to different sources

On Dec 9th, 2025 the market cap of Alliant Energy was reported to be:

£12.53 Billion

by Nasdaq

£12.53 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Xcel Energy XEL	£33.65 B	168.53%	🇺🇸 USA
CMS Energy CMS	£16.10 B	28.49%	🇺🇸 USA
Allete ALE	£2.95 B	-76.40%	🇺🇸 USA
MGE Energy MGEE	£2.15 B	-82.78%	🇺🇸 USA
WEC Energy Group WEC	£25.57 B	104.07%	🇺🇸 USA
Duke Energy DUK	£67.34 B	437.27%	🇺🇸 USA
DTE Energy DTE	£20.32 B	62.17%	🇺🇸 USA
Ameren AEE	£19.98 B	59.47%	🇺🇸 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 Alliant Energy (LNT)

Market cap: £12.53 Billion