<SEC-DOCUMENT>0001104659-21-040464.txt : 20210323
<SEC-HEADER>0001104659-21-040464.hdr.sgml : 20210323
<ACCEPTANCE-DATETIME>20210323203803
ACCESSION NUMBER:		0001104659-21-040464
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210320
FILED AS OF DATE:		20210323
DATE AS OF CHANGE:		20210323

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Boswell Timothy D
		CENTRAL INDEX KEY:			0001723491

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37552
		FILM NUMBER:		21766276

	MAIL ADDRESS:	
		STREET 1:		901 S. BOND STREET, 6TH FLOOR
		CITY:			BALTIMORE
		STATE:			MD
		ZIP:			21231

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WillScot Mobile Mini Holdings Corp.
		CENTRAL INDEX KEY:			0001647088
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MISCELLANEOUS EQUIPMENT RENTAL & LEASING [7350]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		4646 E. VAN BUREN STREET
		STREET 2:		SUITE 400
		CITY:			PHOENIX
		STATE:			AZ
		ZIP:			85008
		BUSINESS PHONE:		480-894-6311

	MAIL ADDRESS:	
		STREET 1:		4646 E. VAN BUREN STREET
		STREET 2:		SUITE 400
		CITY:			PHOENIX
		STATE:			AZ
		ZIP:			85008

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	WillScot Corp
		DATE OF NAME CHANGE:	20171130

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Double Eagle Acquisition Corp.
		DATE OF NAME CHANGE:	20150814

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Double Eagle Acquisitions Corp.
		DATE OF NAME CHANGE:	20150706
</SEC-HEADER>
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<DESCRIPTION>OWNERSHIP DOCUMENT
<TEXT>
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    <documentType>4</documentType>

    <periodOfReport>2021-03-20</periodOfReport>

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    <issuer>
        <issuerCik>0001647088</issuerCik>
        <issuerName>WillScot Mobile Mini Holdings Corp.</issuerName>
        <issuerTradingSymbol>WSC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001723491</rptOwnerCik>
            <rptOwnerName>Boswell Timothy D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>4646 E. VAN BUREN STREET, SUITE 400</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PHOENIX</rptOwnerCity>
            <rptOwnerState>AZ</rptOwnerState>
            <rptOwnerZipCode>85008</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>EVP &amp; CFO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock, par value $0.0001 per share</value>
            </securityTitle>
            <transactionDate>
                <value>2021-03-20</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
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                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>21312</value>
                </transactionShares>
                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>9612</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>26.82</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
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                </transactionAcquiredDisposedCode>
            </transactionAmounts>
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                    <value>65217</value>
                </sharesOwnedFollowingTransaction>
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        <nonDerivativeTransaction>
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            <transactionDate>
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            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
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                    <value>8554</value>
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                <transactionPricePerShare>
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                </sharesOwnedFollowingTransaction>
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            <securityTitle>
                <value>Common stock, par value $0.0001 per share</value>
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            <transactionDate>
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            <deemedExecutionDate></deemedExecutionDate>
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                <directOrIndirectOwnership>
                    <value>D</value>
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        </nonDerivativeTransaction>
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    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
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                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>21312</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
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            <expirationDate>
                <footnoteId id="F4"/>
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                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>21312</value>
                </underlyingSecurityShares>
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                    <value>D</value>
                </directOrIndirectOwnership>
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        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
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                <value>2021-03-21</value>
            </transactionDate>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>8554</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F5"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F5"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>8554</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>102281</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Represents common stock received upon the vesting of previously issued time-based restricted stock units (&quot;RSUs&quot;). The vesting of the RSUs is reported below in Table II.</footnote>
        <footnote id="F2">Shares withheld to satisfy tax obligations upon the receipt of common stock in connection with the vesting of RSUs reported below in Table II.</footnote>
        <footnote id="F3">Each RSU represents a contingent right to receive upon vesting one share of common stock of the Issuer, par value $0.0001 per share, or its cash equivalent.</footnote>
        <footnote id="F4">Represents the annual vesting of RSUs originally granted on March 20, 2018. The Reporting Person was granted 85,249 RSUs on March 20, 2018 which vest annually in four equal installments (1/4 per year) on March 20 of each year beginning in 2019 subject to the terms and conditions of the previously disclosed WillScot Corporation 2017 Incentive Award Plan (the &quot;2017 Plan&quot;) and the Restricted Stock Unit Award Agreement entered into between the Issuer and the Reporting Person.</footnote>
        <footnote id="F5">Represents the annual vesting of RSUs originally granted on March 21, 2019. The Reporting Person was granted 34,217 RSUs on March 21, 2019 which vest annually in four equal installments (1/4 per year) on March 21 of each year beginning in 2020 subject to the terms and conditions of the 2017 Plan and the Restricted Stock Unit Award Agreement entered into between the Issuer and the Reporting Person.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>s/ Christopher J. Miner as Attorney-in-Fact</signatureName>
        <signatureDate>2021-03-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
