UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of

the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): ~~April~~May 2913, 2026

SiteOne Landscape Supply, Inc.

(Exact name of registrant as specified in its charter)

Delaware		001-37760		46-4056061
(State or other jurisdiction of incorporation)		(Commission File Number)		(IRS Employer Identification No.)

300 Colonial Center Parkway, Suite 600 Roswell, Georgia		30076
300 Colonial Parkway, Suite 600 Roswell, Georgia		30076
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code:

(470) 277-7000

Not Applicable
(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

	¨	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

	¨	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

	¨	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

	¨	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Stock, par value $0.01 per share		SITE		New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ¨

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 13(a) of the Exchange Act. ¨

~~Item~~Securities ~~2.02~~registered ~~Results~~pursuant to Section 12(b) of ~~Operations~~the ~~and Financial Condition.~~Act:

On April 29, 2026, SiteOne Landscape Supply, Inc. issued a press release announcing its results of operations for the first quarter ended March 29, 2026. A copy of the press release is furnished herewith as Exhibit 99.1.

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Stock, par value $0.01 per share		SITE		New York Stock Exchange

Item 95.0107. ~~Financial~~Submission ~~Statements~~of ~~and~~Matters ~~Exhibits~~to a Vote of Security Holders.

Exhibit No.		Description
99.1		Press Release dated April 29, 2026
104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

On May 13, 2026, SiteOne Landscape Supply, Inc. (the “Company”) held its Annual Meeting of Stockholders (the “Annual Meeting”). At the Annual Meeting, three proposals were submitted to the Company’s stockholders. The final voting results were as follows:

~~SIGNATURES~~Proposal 1: The Company’s stockholders elected the two nominees named in the Company’s 2026 Proxy Statement to serve a one-year term expiring at the Company’s 2027 Annual Meeting of Stockholders. The voting results are set forth below.

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Director Nominee	Votes For		Votes Withheld		Broker Non-Votes
William W. Douglas III		39,837,852		1,566,019		1,192,867
Jeri L. Isbell		40,518,404		885,467		1,192,867

~~SITEONE~~Proposal ~~LANDSCAPE~~2: ~~SUPPLY,~~The ~~INC.~~Company’s ~~By:~~stockholders ratified /the appointment of Deloitte & Touche LLP to serve as the Company’s/ ~~Travis~~independent ~~Jackson~~registered ~~Travis~~accounting ~~Jackson~~firm ~~General~~for ~~Counsel~~the &2026 fiscal ~~Secretary~~year. The voting results are set forth below.

Date: April 29, 2026

Votes For				Votes Against				Abstain
	42,448,149				128,428				20,161

~~EXHIBIT~~Proposal ~~INDEX~~3: TOThe ~~CURRENT~~Company’s ~~REPORT~~stockholders approved ONan ~~FORM~~advisory ~~8-K Dated~~vote ~~April~~on ~~29,~~the ~~2026~~compensation of the Company’s named executive officers. The voting results are set forth below.

99.1 Press Release dated April 29, 2026

Votes For				Votes Against				Abstain				Broker Non-Votes
	40,505,407				876,683				21,781				1,192,867

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	SITEONE LANDSCAPE SUPPLY, INC.


	By:	/s/ Travis Jackson
		Name: Travis Jackson
		Title: General Counsel and Secretary

Date: May 19, 2026

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