v3.25.4
STOCK-BASED COMPENSATION (Tables)
12 Months Ended
Dec. 31, 2025
Share-Based Payment Arrangement [Abstract]  
Summary of Share Grant Activity
A summary of share grant activity under the Share Grant Plans during the years ended December 31, 2025 and 2024 is presented below:

Year ended December 31, 2025
Share Grants
(number of common shares)
Weighted-Average
Price
Share grants outstanding - beginning1,407,294 $20.50 
    Vested and issued1
(335,669)— 
    Forfeited(46,481)$20.50 
Share grants outstanding - ending1,025,144 $20.50 
    
1    In 2025, Hydro One issued 335,669 common shares from treasury to eligible employees in accordance with provisions of the Share Grant Plans.

Year ended December 31, 2024
Share Grants
(number of common shares)
Weighted-Average
Price
Share grants outstanding - beginning1,782,376 $20.50 
    Vested and issued1
(348,678)— 
    Granted1,092 — 
    Forfeited(27,496)$20.50 
Share grants outstanding - ending1,407,294 $20.50 
1    In 2024, Hydro One issued 348,678 common shares from treasury to eligible employees in accordance with provisions of the Share Grant Plans.
Summary of Number of DSUs
A summary of DSU awards activity under the Directors' DSU Plan during the years ended December 31, 2025 and 2024 is presented below:
Year ended December 31 (number of DSUs)
20252024
DSUs outstanding - beginning107,296 94,624 
    Granted21,033 22,293 
    Settled(26,073)(9,621)
DSUs outstanding - ending102,256 107,296 
A summary of DSU awards activity under the Management DSU Plan during the years ended December 31, 2025 and 2024 is presented below:
Year ended December 31 (number of DSUs)
20252024
DSUs outstanding - beginning85,690 134,370 
    Granted14,219 16,600 
    Settled(19,505)(65,280)
DSUs outstanding - ending80,404 85,690 
Summary of Number of PSUs and RSUs
A summary of PSU and RSU awards activity under the LTIP during the years ended December 31, 2025 and 2024 is presented below:
                                PSUs                               RSUs
Year ended December 31 (number of units)
2025202420252024
Units outstanding - beginning286,554 142,925 322,925 186,971 
    Granted179,731 189,104 154,754 158,757 
    Forfeited(45,655)(24,918)(60,660)(20,377)
 Vested and issued(21,449)(20,557)(25,396)(2,426)
Units outstanding - ending399,181 286,554 391,623 322,925