Hydro One (H.TO) - Market capitalization

Market cap: C$29.41 Billion

As of March 2025 Hydro One has a market cap of C$29.41 Billion. This makes Hydro One the world's 971th 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 Hydro One from 2015 to 2025

End of year Market Cap

Year	Marketcap	Change
2025	C$29.41 B	11.01%
2024	C$26.49 B	11.2%
2023	C$23.82 B	9.27%
2022	C$21.80 B	10.76%
2021	C$19.68 B	15%
2020	C$17.12 B	14.38%
2019	C$14.96 B	24.03%
2018	C$12.06 B	-9.56%
2017	C$13.34 B	-4.61%
2016	C$13.98 B	5.48%
2015	C$13.26 B

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 Hydro One (H.TO)

Market cap: C$29.41 Billion