National Grid (NGG) - Market capitalization

Market cap: C$106.92 Billion

As of September 2026 National Grid has a market cap of C$106.92 Billion. This makes National Grid the world's 323th 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	C$106.92 B	1.34%
2025	C$105.50 B	26.22%
2024	C$83.58 B	25.66%
2023	C$66.51 B	11.01%
2022	C$59.92 B	-9.12%
2021	C$65.93 B	24.61%
2020	C$52.91 B	-5.99%
2019	C$56.28 B	25.38%
2018	C$44.89 B	-10.06%
2017	C$49.91 B	-15.4%
2016	C$58.99 B	-18.21%
2015	C$72.13 B	15.75%
2014	C$62.31 B	20.77%
2013	C$51.59 B	25.54%
2012	C$41.09 B	17.06%
2011	C$35.10 B	13.19%
2010	C$31.01 B	-2.37%
2009	C$31.76 B	-5.49%
2008	C$33.61 B	-29.82%
2007	C$47.89 B	-7.63%
2006	C$51.85 B	49.41%
2005	C$34.70 B	-13.58%
2004	C$40.15 B	23.01%
2003	C$32.64 B	40.15%
2002	C$23.29 B	41.93%
2001	C$16.41 B

End of Day market cap according to different sources

On Sep 28th, 2026 the market cap of National Grid was reported to be:

C$112.10 Billion

by Nasdaq

C$107.34 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
BP BP	C$159.05 B	48.76%	🇬🇧 UK
Consolidated Edison ED	C$54.23 B	-49.28%	🇺🇸 USA
DTE Energy DTE	C$36.14 B	-66.20%	🇺🇸 USA
Sempra SRE	C$72.54 B	-32.15%	🇺🇸 USA
NiSource NI	C$26.75 B	-74.97%	🇺🇸 USA
TC Energy TRP	C$86.13 B	-19.44%	🇨🇦 Canada
Unitil Corporation UTL	C$1.31 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: C$106.92 Billion