As filed with the Securities and Exchange Commission on April 25, 2017

Registration No. 333-            

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-1

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

SiteOne Landscape Supply, Inc.

(Exact name of registrant as specified in its charter)

300 Colonial Center Parkway, Suite 600

Roswell, Georgia 30076

(470) 277-7000

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Briley Brisendine

Executive Vice President, General Counsel and Secretary

SiteOne Landscape Supply, Inc.

300 Colonial Center Parkway, Suite 600

Roswell, Georgia 30076

(470) 277-7000

(Name, address, including zip code, and telephone number, including area code, of agent for service)

with copies to:

Approximate date of commencement of proposed sale of the securities to the public: As soon as practicable after this registration statement becomes effective.

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, check the following box.  ☐

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☒ 333-217327

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

CALCULATION OF REGISTRATION FEE

This Registration Statement shall become effective upon filing in accordance with Rule 462(b) under the Securities Act of 1933, as amended.

EXPLANATORY NOTE

This Registration Statement is being filed by SiteOne Landscape Supply, Inc. (the “Company”) pursuant to Rule 462(b) under the Securities Act of 1933, as amended, to register an additional number of shares of the Company’s common stock, par value $0.01 per share. The Company hereby incorporates by reference into this Registration Statement on Form S-1 in its entirety the Registration Statement on Form S-1 (File No. 333-217327), as amended (including the exhibits thereto), declared effective on April 25, 2017 by the U.S. Securities and Exchange Commission (the “Commission”).

CERTIFICATION

The Company hereby certifies to the Commission that (i) it has instructed its bank to transmit to the Commission the filing fee set forth on the cover page of this Registration Statement by a wire transfer of such amount to the Commission’s account as soon as practicable (but no later than the close of business on April 26, 2017), (ii) it will not revoke such instructions, (iii) it has sufficient funds in the relevant account to cover the amount of such filing fee and (iv) it will confirm receipt of such instructions by its bank during regular business hours on April 26, 2017.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, SiteOne Landscape Supply, Inc. has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Roswell, State of Georgia on April 25, 2017.

Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed on April 25, 2017 by the following persons in the capacities indicated.

EXHIBIT INDEX