National Grid (NGG) - Market capitalization

Market cap: A$111.31 Billion

As of September 2026 National Grid has a market cap of A$111.31 Billion. This makes National Grid the world's 314th 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 National Grid from 2001 to 2026

End of year Market Cap

Year	Marketcap	Change
2026	A$111.31 B	-3.22%
2025	A$115.02 B	22.82%
2024	A$93.64 B	27.22%
2023	A$73.61 B	13.44%
2022	A$64.88 B	-9.07%
2021	A$71.36 B	32.22%
2020	A$53.97 B	-12.32%
2019	A$61.55 B	31.58%
2018	A$46.78 B	-8.01%
2017	A$50.85 B	-16.51%
2016	A$60.90 B	-14.67%
2015	A$71.37 B	8.78%
2014	A$65.61 B	20.74%
2013	A$54.34 B	36.63%
2012	A$39.77 B	18.15%
2011	A$33.66 B	10.2%
2010	A$30.54 B	-9.11%
2009	A$33.61 B	-14.23%
2008	A$39.18 B	-28.65%
2007	A$54.91 B	-2.79%
2006	A$56.49 B	38.67%
2005	A$40.74 B	-5.71%
2004	A$43.20 B	27.61%
2003	A$33.86 B	29.34%
2002	A$26.17 B	29.68%
2001	A$20.18 B

End of Day market cap according to different sources

On Aug 31st, 2026 the market cap of National Grid was reported to be:

A$109.85 Billion

by Nasdaq

A$111.33 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
BP BP	A$160.20 B	43.92%	🇬🇧 UK
Consolidated Edison ED	A$55.71 B	-49.95%	🇺🇸 USA
DTE Energy DTE	A$39.60 B	-64.42%	🇺🇸 USA
Sempra SRE	A$77.07 B	-30.76%	🇺🇸 USA
NiSource NI	A$27.47 B	-75.32%	🇺🇸 USA
TC Energy TRP	A$92.01 B	-17.34%	🇨🇦 Canada
Unitil Corporation UTL	A$1.36 B	-98.77%	🇺🇸 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 National Grid (NGG)

Market cap: A$111.31 Billion