X0609 4 2026-05-01 0 0001650729 SiteOne Landscape Supply, Inc. SITE 0001218799 Isbell Jeri L false MANSELL OVERLOOK 300 COLONIAL CENTER PARKWAY, SUITE 600 ROSWELL GA 30076 1 0 0 0 0 Common Stock 2026-05-01 4 M 0 878 A 10317 D Restricted Stock Units 2026-05-01 4 M 0 878 0.00 D Common Stock 878 0 D Filed to report settlement of Restricted Stock Units ("RSUs"). RSUs convert into common stock on a one-for-one basis. On May 11, 2023, the Reporting Person was granted 878 RSUs, vesting upon the earlier of (i) the day preceding the Company's next annual meeting of stockholders and (ii) the first anniversary of May 11, 2024, in each case subject to the Reporting Person's continued service as a non-employee director, and settling on May 1, 2026. Exhibit 24 - Power of Attorney /s/ Travis Jackson, Attorney-in-fact for Jeri L. Isbell 2026-05-05