X0508 4 2025-11-26 0 0001650729 SiteOne Landscape Supply, Inc. SITE 0001672096 GUTHRIE JOHN T MANSELL OVERLOOK 300 COLONIAL CENTER PARKWAY, SUITE 600 ROSWELL GA 30076 0 1 0 0 EVP, CFO and Assistant Sec. 0 Common Stock 2025-11-26 4 S 0 1915 134.83 D 13569 D The price reported in column 4 is a weighted average price. The shares were sold at prices ranging from $134.70 to $135.00, inclusive. Upon request by the SEC staff, the issuer, or any security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price will be provided. /s/ John Guthrie 2025-12-01