Mr. Wassem Khalil reports

HYDRO ONE TO RELEASE SECOND QUARTER 2025 RESULTS ON AUGUST 13, 2025 BEFORE MARKETS OPEN

Hydro One Ltd. plans to release its second quarter financial results the morning of Aug. 13, 2025, before North American financial markets open. A summary of the results will be distributed by news wire, and the complete management's discussion and analysis and financial statements will be posted at the Hydro One website and at SEDAR+.

Hydro One's management will host a teleconference with the investment community starting at 8 a.m. ET that same morning to discuss the results and outlook. Those wishing to listen to the teleconference can access the live webcast through the investor relations events and presentations section of Hydro One's website. A rebroadcast of the teleconference will be available following the call at the same link.

Members of the North American financial community wanting to ask questions during the call should use a registration link, and you will be provided with personalized dial-in details. To avoid delays, the company encourages participants to dial into the conference call 15 minutes ahead of the scheduled start time. Other interested parties and media are welcome to participate on a listen-only basis.

About Hydro One Ltd.

Hydro One, through its wholly owned subsidiaries, is Ontario's largest electricity transmission and distribution provider with 1.5 million valued customers, $36.7-billion in assets as at Dec. 31, 2024, and annual revenues in 2024 of $8.5-billion.

Its team of 10,100 skilled and dedicated employees proudly build and maintain a safe and reliable electricity system which is essential to supporting strong and successful communities. In 2024, Hydro One invested $3.1-billion in its transmission and distribution networks, and supported the economy through buying $2.9-billion of goods and services.

It is committed to the communities where it lives and works through community investment, sustainability and diversity initiatives.

Hydro One's common shares are listed on the Toronto Stock Exchange, and certain of Hydro One Inc.'s medium-term notes are listed on the New York Stock Exchange.