Page 1

Table of Contents X ☐ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON , D.C. 20549 ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 1934 TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF Title of each class FORM 10 - K For the fiscal year ended January 3 , 2021 or Delaware ( State or other jurisdiction of incorporation or organization ) Common Stock , $ 0.01 par For the Transition Period From SiteOne Landscape Supply , Inc. ( Exact name of registrant as specified in its charter ) value per Commission file number : 001-37760 share SiteOne LANDSCAPE SUPPLY Stronger Together to 300 Colonial Center Parkway , Suite 600 , Roswell , Georgia 30076 ( Address of principal executive offices ) ( Zip Code ) ( 470 ) 277-7000 ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) SITE 46-4056061 ( IRS Employer Identification No. ) None ( Title of class ) Name of each exchange on which registered New York Stock Exchange Securities registered pursuant to Section 12 ( g ) of the Act :