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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2019-08-02</periodOfReport>

    <issuer>
        <issuerCik>0001702510</issuerCik>
        <issuerName>TCG BDC II, Inc.</issuerName>
        <issuerTradingSymbol>NONE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001761489</rptOwnerCik>
            <rptOwnerName>NATIONAL COMMERCIAL BANK</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>KING ABDUL AZIZ STREET</rptOwnerStreet1>
            <rptOwnerStreet2>P.O. BOX 3555</rptOwnerStreet2>
            <rptOwnerCity>JEDDAH</rptOwnerCity>
            <rptOwnerState>T0</rptOwnerState>
            <rptOwnerZipCode>21481</rptOwnerZipCode>
            <rptOwnerStateDescription>SAUDI ARABIA</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001761563</rptOwnerCik>
            <rptOwnerName>NCB CAPITAL Co</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>4TH FLOOR TOWER B, NCB REGIONAL BUILDING</rptOwnerStreet1>
            <rptOwnerStreet2>KING SAUD ROAD, P.O. BOX 22216</rptOwnerStreet2>
            <rptOwnerCity>RIYADH</rptOwnerCity>
            <rptOwnerState>T0</rptOwnerState>
            <rptOwnerZipCode>11495</rptOwnerZipCode>
            <rptOwnerStateDescription>SAUDI ARABIA</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2019-08-02</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>30432</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>20.88</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4011543.431</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See notes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2019-08-02</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>468188</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>20.88</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4479731.431</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents 30,432 shares of common stock of the Issuer acquired by the Joint Filer on August 2, 2019.</footnote>
        <footnote id="F2">Represents 468,188 shares of common stock of the Issuer acquired by the Reporting Person on August 2, 2019.</footnote>
        <footnote id="F3">The Reporting Person is the parent entity of the Joint Filer. After giving effect to the acquisitions reported on this Form 4, the aggregate number of shares beneficially owned by the Reporting Person is 4,479,731.431 which includes the shares of common stock of the Issuer owned by the Joint Filer.  Based on the total number of shares that will be issued effective on or around August 14, 2019, pursuant to the Issuer's capital call made on August 2, 2019 - 26,046,830 shares of common stock of the Issuer as reported by the Issuer in its Current Report on Form 8-K filed with the Securities and Exchange Commission (the &quot;SEC&quot;) on August 5, 2019, the percentage of common stock of the Issuer beneficially owned, in the aggregate, by the Reporting Person is 17.20%.</footnote>
        <footnote id="F4">Based on the total number outstanding shares of common stock of the Issuer as of June 26, 2019, as disclosed in the Issuer's Current Report on Form 8-K filed with the SEC on June 17, 2019 (23,173,265), the percentage of the outstanding shares of common stock beneficially owned, in the aggregate, by the Reporting Person is 19.33%.</footnote>
    </footnotes>

    <remarks>Exhibit 99.1 (Joint Filer Information) is incorporated herein by reference.</remarks>

    <ownerSignature>
        <signatureName>THE NATIONAL COMMERCIAL BANK
By: /s/ Reem Al-Majed
Name: Reem Al-Majed
Title: Treasurer-Bahrain Branch</signatureName>
        <signatureDate>2019-08-06</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>THE NATIONAL COMMERCIAL BANK
By: /s/ Ahmed H. Mousa
Name:  Ahmed H. Mousa
Title: General Manager-Bahrain Branch</signatureName>
        <signatureDate>2019-08-06</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>NCB CAPITAL COMPANY
By: /s/ Abdullah Alnahdi
Name: On behalf of  Wisam Fasihaldin
Title: Chief Finance Officer</signatureName>
        <signatureDate>2019-08-06</signatureDate>
    </ownerSignature>
</ownershipDocument>
