<SEC-DOCUMENT>0001104659-26-061427.txt : 20260514
<SEC-HEADER>0001104659-26-061427.hdr.sgml : 20260514
<ACCEPTANCE-DATETIME>20260514190451
ACCESSION NUMBER:		0001104659-26-061427
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20260512
FILED AS OF DATE:		20260514
DATE AS OF CHANGE:		20260514

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Diaz Fred M
		CENTRAL INDEX KEY:			0001712371
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37760
		FILM NUMBER:		26981305

	MAIL ADDRESS:	
		STREET 1:		9614 AMALFI CT
		CITY:			BRENTWOOD
		STATE:			TN
		ZIP:			37027

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SiteOne Landscape Supply, Inc.
		CENTRAL INDEX KEY:			0001650729
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-PROFESSIONAL & COMMERCIAL EQUIPMENT & SUPPLIES [5040]
		ORGANIZATION NAME:           	07 Trade & Services
		EIN:				364485550
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0103

	BUSINESS ADDRESS:	
		STREET 1:		MANSELL OVERLOOK
		STREET 2:		300 COLONIAL CENTER PARKWAY, SUITE 600
		CITY:			ROSWELL
		STATE:			GA
		ZIP:			30076
		BUSINESS PHONE:		(470) 277-7000

	MAIL ADDRESS:	
		STREET 1:		MANSELL OVERLOOK
		STREET 2:		300 COLONIAL CENTER PARKWAY, SUITE 600
		CITY:			ROSWELL
		STATE:			GA
		ZIP:			30076
</SEC-HEADER>
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<DESCRIPTION>OWNERSHIP DOCUMENT
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<ownershipDocument>

    <schemaVersion>X0609</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2026-05-12</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001650729</issuerCik>
        <issuerName>SiteOne Landscape Supply, Inc.</issuerName>
        <issuerTradingSymbol>SITE</issuerTradingSymbol>
        <issuerForeignTradingSymbol></issuerForeignTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001712371</rptOwnerCik>
            <rptOwnerName>Diaz Fred M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>false</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>MANSELL OVERLOOK</rptOwnerStreet1>
            <rptOwnerStreet2>300 COLONIAL CENTER PARKWAY, SUITE 600</rptOwnerStreet2>
            <rptOwnerCity>ROSWELL</rptOwnerCity>
            <rptOwnerState>GA</rptOwnerState>
            <rptOwnerZipCode>30076</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
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    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
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            <transactionDate>
                <value>2026-05-12</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1125</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>12392</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
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        </nonDerivativeTransaction>
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    <derivativeTable>
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            <securityTitle>
                <value>Restricted Stock Units</value>
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                <footnoteId id="F1"/>
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            <transactionDate>
                <value>2026-05-12</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1125</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1125</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
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                    <value>D</value>
                </directOrIndirectOwnership>
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        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
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            <conversionOrExercisePrice>
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            <transactionDate>
                <value>2026-05-13</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1186</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
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            <exerciseDate>
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            <expirationDate>
                <footnoteId id="F4"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
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                <underlyingSecurityShares>
                    <value>1186</value>
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                    <value>1186</value>
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                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
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        </derivativeTransaction>
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    <footnotes>
        <footnote id="F1">Filed to report vesting of Restricted Stock Units (&quot;RSUs&quot;). RSUs convert into common stock on a one-for-one basis.</footnote>
        <footnote id="F2">On May 14, 2025, the Reporting Person was granted 1,125 RSUs, vesting and settling upon the earlier of (i) the day preceding the Company's next annual meeting of stockholders and (ii) the first anniversary of May 14, 2025, in each case subject to the Reporting Person's continued service as a non-employee director.</footnote>
        <footnote id="F3">RSUs convert into common stock on a one-for-one basis.</footnote>
        <footnote id="F4">The RSUs will vest and settle upon the earlier of (i) the day preceding the Company's next annual meeting of stockholders and (ii) the first anniversary of May 13, 2026, in each case subject to the Reporting Person's continued service as a non-employee director.</footnote>
    </footnotes>

    <remarks>Exhibit 24 - Power of Attorney</remarks>

    <ownerSignature>
        <signatureName>/s/ Travis Jackson, Attorney-in-fact for Fred M. Diaz</signatureName>
        <signatureDate>2026-05-14</signatureDate>
    </ownerSignature>
</ownershipDocument>
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<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>tm2614699d1_ex24.htm
<DESCRIPTION>EXHIBIT 24
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="margin: 0; text-align: right"><B>Exhibit 24</B></P>

<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 1.25pt 0pt 6.65pt; text-align: center"><FONT STYLE="text-decoration: underline solid">POWER
OF ATTORNEY</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 6.65pt; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">February 4, 2026</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-indent: 1in; margin-top: 0pt; margin-bottom: 0pt; text-align: justify"><B>KNOW
ALL MEN BY THESE PRESENTS, </B>that the undersigned hereby constitutes and appoints each of Travis Ryan Jackson, David Wellen, Eric Elema,
Joseph Ketter, and Rebecca Ramstrom as his true and lawful attorneys-in-fact to:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0.5in; text-indent: 0.5in; text-align: justify">(1)<FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</FONT>execute for and on behalf of the undersigned, in any or all of the undersigned&rsquo;s capacity as an Officer and/or Director
of SiteOne Landscape Supply, Inc. (the &ldquo;Company&rdquo;), including (without limitation) (i) Forms 3, 4 and 5 and any other forms,
schedules, statements and other documents which the undersigned is required to be filed with the U.S. Securities and Exchange Commission
(the &ldquo;SEC&rdquo;), in accordance with Section 16(a) of the Securities Exchange Act of 1934 (the &ldquo;Exchange Act&rdquo;) and
the rules thereunder (a &ldquo;Section 16 Form&rdquo;), and (ii) a Form ID, Form D or Update Passphrase request required to be filed
by the undersigned to obtain access codes to effect SEC filing on the SEC electronic systems for securities filings (EDGAR) and any other
forms required to be filed or submitted in accordance with Regulation S-T promulgated by the United States Securities and Exchange Commission
(or any successor provision) in order to file a Section 16 Form electronically (a &ldquo;Form ID&rdquo;, &ldquo;Form D&rdquo; and, together
with a &ldquo;Section 16 Form&rdquo; the &ldquo;Forms and Schedules&rdquo;).</P>

<P STYLE="margin-left: 0.5in; font: 10pt Times New Roman, Times, Serif; text-indent: 0.5in; margin-top: 0pt; margin-bottom: 0pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0.5in; text-align: justify; text-indent: 0.5in">(2)<FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</FONT>serve as Account Administrators to manage the undersigned's EDGAR account, and grants such persons all requisite authority in
connection therewith;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0.5in; text-align: justify; text-indent: 0.5in">(4)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;be the points of contact in connection with EDGAR Update Passphrase requests;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0.5in; text-align: justify; text-indent: 0.5in">(6)<FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</FONT>do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete and execute
any such Forms and Schedules, complete and execute any amendment or amendments thereto, and timely file such Forms and Schedules with
the SEC and any stock exchange or similar authority; and</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0.5in; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0.5in; text-align: justify; text-indent: 0.5in">(7)<FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</FONT>take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in-fact,
may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed
by such attorney-in-fact on behalf of the undersigned, pursuant to this Power of Attorney, shall be in such form and shall contain such
terms and conditions as such attorney-in-fact may approve in his or her discretion.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-indent: 1in; margin-top: 0pt; margin-bottom: 0pt; text-align: justify">The undersigned
hereby grants to each such attorney-in-fact full power and authority to do and perform each and every act and thing whatsoever requisite,
necessary, and proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes
as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming
all that such attorney-in-fact, or his or her substitute or substitutes, shall lawfully do or cause to be done by virtue of this Power
of Attorney and the rights and powers herein granted. The undersigned acknowledges that no such attorney-in-fact, in serving in such
capacity at the request of the undersigned, is hereby assuming any of the undersigned's responsibilities to comply with Section 13 and
Section 16 of the Securities Exchange Act of 1934 and the rules thereunder, as amended.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-indent: 1in; margin-left: 0in; margin-top: 0pt; margin-bottom: 0pt; text-align: justify">This
Power of Attorney shall remain in full force and effect until revoked by the undersigned in a signed writing delivered to the foregoing
attorneys-in-fact.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 5.8pt 0pt 2.9pt; text-align: justify; text-indent: 71.75pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 5.8pt 0pt 2.9pt; text-align: justify; text-indent: 71.75pt"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 5.8pt 0pt 2.9pt; text-align: justify; text-indent: 71.75pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 4.3pt; text-indent: -0.15pt"><B>IN WITNESS WHEREOF</B>, the undersigned
has caused this Power of Attorney to be executed as the date first written above.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: left">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; border-collapse: collapse; width: 100%">
  <TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: White">
    <TD>&nbsp;</TD>
    <TD COLSPAN="2" STYLE="font: bold 10pt Times New Roman, Times, Serif">Fred M. Diaz</TD></TR>
  <TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: White">
    <TD>&nbsp;</TD>
    <TD COLSPAN="2" STYLE="font: bold 10pt Times New Roman, Times, Serif">&nbsp;</TD></TR>
  <TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: White">
    <TD STYLE="width: 50%">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 3%">By:</TD>
    <TD STYLE="border-bottom: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; width: 47%"> /s/ Fred M. Diaz</TD></TR>
  </TABLE>


<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="margin: 0"></P>

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