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

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-12-15</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001498547</issuerCik>
        <issuerName>CIM REAL ESTATE FINANCE TRUST, INC.</issuerName>
        <issuerTradingSymbol>NONE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001923525</rptOwnerCik>
            <rptOwnerName>Schreiber Jason K</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2398 EAST CAMELBACK ROAD</rptOwnerStreet1>
            <rptOwnerStreet2>4TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>PHOENIX</rptOwnerCity>
            <rptOwnerState>AZ</rptOwnerState>
            <rptOwnerZipCode>85016</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-12-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>21416.731</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>21416.731</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2025-12-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>42833.462</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>42833.462</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>157775.992</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">On December 15, 2025, the reporting person acquired (i) 2,641.310 shares of the Issuer's common stock in connection with the vesting of 5,282.620 of the restricted stock units (&quot;RSUs&quot;) originally granted to CIM Real Estate Finance Management, LLC (the &quot;Manager&quot;) and assigned to the reporting person on a contingent basis on January 10, 2024, (ii) 10,565.240 shares of the Issuer's common stock in connection with the vesting of 21,130.481 of the RSUs originally granted to the Manager and assigned to the reporting person on a contingent basis on June 25, 2024, and (iii) 8,210.181 shares of the Issuer's common stock in connection with the vesting of 16,420.361 of the RSUs originally granted to the Manager and assigned to the reporting person on a contingent basis on December 9, 2024. Each vested RSU settled 50% in the Issuer's common stock and 50% in the cash value thereof.</footnote>
        <footnote id="F2">Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock, payable 50% in the Issuer's common stock and 50% in the cash value thereof.</footnote>
        <footnote id="F3">Represents (i) the remaining 5,282.620 restricted stock units originally granted to CIM Real Estate Finance Management, LLC and assigned to the reporting person on a contingent basis on January 10, 2024, which will vest on December 15, 2026, (ii) the remaining 21,130.481 restricted stock units originally granted to CIM Real Estate Finance Management, LLC and assigned to the reporting person on a contingent basis on June 25, 2024, which will vest on December 15, 2026, (iii) the remaining 16,420.361 restricted stock units originally granted to CIM Real Estate Finance Management, LLC and assigned to the reporting person on a contingent basis on December 9, 2024, which will vest on December 15, 2026, and (iv) the 114,942.529 restricted stock units originally granted to CIM Real Estate Finance Management, LLC and assigned to the reporting person on a contingent basis on April 15, 2025,  which will vest in three equal annual installments beginning on April 15, 2026.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Jason Schreiber</signatureName>
        <signatureDate>2025-12-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
