<SEC-DOCUMENT>0001703056-19-000070.txt : 20190318
<SEC-HEADER>0001703056-19-000070.hdr.sgml : 20190318
<ACCEPTANCE-DATETIME>20190318162338
ACCESSION NUMBER:		0001703056-19-000070
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20190314
FILED AS OF DATE:		20190318
DATE AS OF CHANGE:		20190318

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Susil Zachary
		CENTRAL INDEX KEY:			0001723393

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38352
		FILM NUMBER:		19688526

	MAIL ADDRESS:	
		STREET 1:		1501 YAMATO ROAD
		CITY:			BOCA RATON
		STATE:			FL
		ZIP:			33431

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ADT Inc.
		CENTRAL INDEX KEY:			0001703056
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-DETECTIVE, GUARD & ARMORED CAR SERVICES [7381]
		IRS NUMBER:				474116383
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1501 YAMATO ROAD
		CITY:			BOCA RATON
		STATE:			FL
		ZIP:			33431
		BUSINESS PHONE:		212-515-3200

	MAIL ADDRESS:	
		STREET 1:		1501 YAMATO ROAD
		CITY:			BOCA RATON
		STATE:			FL
		ZIP:			33431

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ADT, Inc.
		DATE OF NAME CHANGE:	20170928

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Prime Security Services Parent, Inc.
		DATE OF NAME CHANGE:	20170405
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_155294060220394.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2019-03-14</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001703056</issuerCik>
        <issuerName>ADT Inc.</issuerName>
        <issuerTradingSymbol>ADT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001723393</rptOwnerCik>
            <rptOwnerName>Susil Zachary</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ADT INC.</rptOwnerStreet1>
            <rptOwnerStreet2>1501 YAMATO ROAD</rptOwnerStreet2>
            <rptOwnerCity>BOCA RATON</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33431</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP, Controller</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2019-03-14</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>20226</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>20226.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>20226</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Options</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>6.18</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2019-03-14</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>59808</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <value>2029-03-14</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>59808.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>59808</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Each restricted stock unit (&quot;RSU&quot;) was received as a grant under the ADT Inc. 2018 Omnibus Incentive Plan on March 14, 2019 and represents a contingent right to receive one share of ADT Inc. common stock upon vesting and settlement.  The RSUs will vest in three equal instalments of 1/3 of the total grant on each of March 14, 2020, March 14, 2021 and March 14, 2022, generally subject to the reporting person's continued employment through such date.</footnote>
        <footnote id="F2">Amount of derivative securities beneficially owned only includes derivative securities of the same class that are beneficially owned by the reporting person that vest on the same vesting dates and have the same exercise price as the grant listed.</footnote>
        <footnote id="F3">The reporting person was granted stock options under the ADT Inc. 2018 Omnibus Incentive Plan on March 14, 2019.  The stock options will vest in three equal instalments of 1/3 of the total grant on each of March 14, 2020, March 14, 2021 and March 14, 2022, generally subject to the reporting person's continued employment through such date.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Lee Jackson, attorney-in-fact</signatureName>
        <signatureDate>2019-03-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
