X0508 4 2026-02-13 0 0001650729 SiteOne Landscape Supply, Inc. SITE 0002102762 Elema Eric J MANSELL OVERLOOK 300 COLONIAL CENTER PARKWAY, SUITE 600 ROSWELL GA 30076 0 1 0 0 EVP, CFO and Assistant Sec. 0 Common Stock 2026-02-13 4 M 0 3755 26.67 A 4676 D Common Stock 2026-02-13 4 S 0 1765 158.01 D 2911 D Stock Options (right to buy) 26.67 2026-02-13 4 M 0 3755 0.00 A 2026-05-12 Common Stock 3755 0 D 20,621 options were granted on May 12, 2016, and vested and became exercisable ratably in four installments on each anniversary of May 12, 2016. Prior to the transactions reported on this Form 4, 3,755 of these options that remain outstanding had vested. /s/ Travis Jackson, attorney-in-fact for Eric Elema 2026-02-17