NRG Energy (NRG) - Market capitalization

Market cap: €18.53 Billion

As of September 2026 NRG Energy has a market cap of €18.53 Billion. This makes NRG Energy the world's 1120th 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 NRG Energy from 2003 to 2026

End of year Market Cap

Year	Marketcap	Change
2026	€18.53 B	-30.03%
2025	€26.49 B	48%
2024	€17.89 B	69.52%
2023	€10.55 B	54.5%
2022	€6.83 B	-26.62%
2021	€9.31 B	24.92%
2020	€7.45 B	-15.61%
2019	€8.83 B	-10.02%
2018	€9.81 B	30.64%
2017	€7.51 B	104.42%
2016	€3.67 B	8.71%
2015	€3.38 B	-54.66%
2014	€7.46 B	10.79%
2013	€6.73 B	20.09%
2012	€5.60 B	74.74%
2011	€3.20 B	-11.64%
2010	€3.63 B	-13.24%
2009	€4.18 B	7.62%
2008	€3.88 B	-44.65%
2007	€7.02 B	35.33%
2006	€5.19 B	61.75%
2005	€3.21 B	38.77%
2004	€2.31 B	-33.15%
2003	€3.46 B

End of Day market cap according to different sources

On Sep 27th, 2026 the market cap of NRG Energy was reported to be:

€18.53 Billion

by Nasdaq

€18.53 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
AES AES	€9.31 B	-49.72%	🇺🇸 USA
Edison International EIX	€17.79 B	-3.97%	🇺🇸 USA
Exelon Corporation EXC	€36.51 B	96.98%	🇺🇸 USA
Sempra SRE	€44.76 B	141.52%	🇺🇸 USA
Southern Company SO	€83.75 B	351.88%	🇺🇸 USA
Nextera Energy NEE	€139.41 B	652.18%	🇺🇸 USA
Duke Energy DUK	€77.64 B	318.88%	🇺🇸 USA
Entergy ETR	€41.37 B	123.21%	🇺🇸 USA
OGE Energy OGE	€8.13 B	-56.13%	🇺🇸 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 NRG Energy (NRG)

Market cap: €18.53 Billion