Hydro One (H.TO) - Market capitalization

Market cap: HK$166.58 Billion

As of April 2025 Hydro One has a market cap of HK$166.58 Billion. This makes Hydro One the world's 910th 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	HK$166.58 B	16.21%
2024	HK$143.34 B	2.17%
2023	HK$140.30 B	11.74%
2022	HK$125.55 B	4.24%
2021	HK$120.45 B	15.73%
2020	HK$104.08 B	16.62%
2019	HK$89.25 B	28.66%
2018	HK$69.37 B	-16.34%
2017	HK$82.92 B	2.73%
2016	HK$80.72 B	8.93%
2015	HK$74.10 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: HK$166.58 Billion