<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2022-12-06</periodOfReport>

    <notSubjectToSection16>true</notSubjectToSection16>

    <issuer>
        <issuerCik>0001710583</issuerCik>
        <issuerName>Switch, Inc.</issuerName>
        <issuerTradingSymbol>SWCH</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001567047</rptOwnerCik>
            <rptOwnerName>Sheehy Kimberly H.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O SWITCH, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>7135 SOUTH DECATUR BOULEVARD</rptOwnerStreet2>
            <rptOwnerCity>LAS VEGAS</rptOwnerCity>
            <rptOwnerState>NV</rptOwnerState>
            <rptOwnerZipCode>89118</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2022-12-06</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>58241</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>34.25</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents the cancellation of securities in exchange for the per share cash Merger consideration of $34.25, on the Merger closing date, in accordance with the terms of that certain Agreement and Plan of Merger (the &quot;Merger Agreement&quot;), dated May 11, 2022, by and among Switch, Inc. (the &quot;Company&quot;), Switch, Ltd., a Nevada limited liability company, Sunshine Merger Sub, Ltd., a Nevada limited liability company and a direct and wholly owned subsidiary of the Company, Sunshine Bidco Inc., a Delaware corporation (&quot;Parent&quot;), and Sunshine Parent Merger Sub Inc., a Nevada corporation and a wholly owned subsidiary of Parent.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Gabriel Nacht, as Attorney-in-Fact for Kimberly H. Sheehy</signatureName>
        <signatureDate>2022-12-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
