National Grid (NGG) - Market capitalization

Market cap: HK$583.09 Billion

As of December 2025 National Grid has a market cap of HK$583.09 Billion. This makes National Grid the world's 295th 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 2025

End of year Market Cap

Year	Marketcap	Change
2025	HK$583.09 B	28.94%
2024	HK$452.22 B	15.45%
2023	HK$391.68 B	13.53%
2022	HK$345.01 B	-14.48%
2021	HK$403.42 B	25.4%
2020	HK$321.71 B	-4.15%
2019	HK$335.65 B	30.06%
2018	HK$258.08 B	-16.8%
2017	HK$310.18 B	-8.89%
2016	HK$340.44 B	-15.53%
2015	HK$403.01 B	-3.24%
2014	HK$416.50 B	10.81%
2013	HK$375.86 B	17.32%
2012	HK$320.36 B	19.5%
2011	HK$268.08 B	11.02%
2010	HK$241.47 B	3.15%
2009	HK$234.10 B	9.58%
2008	HK$213.63 B	-42.94%
2007	HK$374.37 B	8.08%
2006	HK$346.38 B	49.87%
2005	HK$231.12 B	-11.05%
2004	HK$259.83 B	33.19%
2003	HK$195.08 B	69.6%
2002	HK$115.02 B	43.17%
2001	HK$80.33 B

End of Day market cap according to different sources

On Dec 4th, 2025 the market cap of National Grid was reported to be:

HK$586.51 Billion

by Nasdaq

HK$586.41 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
NiSource NI	HK$155.30 B	-73.37%	🇺🇸 USA
Consolidated Edison ED	HK$270.38 B	-53.63%	🇺🇸 USA
DTE Energy DTE	HK$213.03 B	-63.47%	🇺🇸 USA
Sempra Energy SRE	HK$462.15 B	-20.74%	🇺🇸 USA
TC Energy TRP	HK$443.98 B	-23.86%	🇨🇦 Canada
BP BP	HK$720.39 B	23.55%	🇬🇧 UK
Unitil Corporation UTL	HK$6.67 B	-98.86%	🇺🇸 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: HK$583.09 Billion