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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2019-10-25</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>2019-10-25</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>51335</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>20.63</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5165282.431</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>2019-10-25</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>789765</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>20.63</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5995047.431</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents 51,335 shares of common stock of the Issuer acquired by the Joint Filer on October 25, 2019.</footnote>
        <footnote id="F2">Represents 789,675 shares of common stock of the Issuer acquired by the Reporting Person on October 25, 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 5,995,047.431, 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 November 6, 2019, pursuant to the Issuer's capital call made on October 25, 2019 - 35,549,112 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 October 28, 2019, the percentage of common stock of the Issuer beneficially owned, in the aggregate, by the Reporting Person is 16.86%.</footnote>
        <footnote id="F4">Based on the total number of issued and outstanding shares of common stock of the Issuer as of September 25, 2019, as disclosed in the Issuer's Current Report on Form 8-K filed with the SEC on September 16, 2019 (29,701,801), the percentage of the outstanding shares of common stock beneficially owned, in the aggregate, by the Reporting Person is 20.18%.</footnote>
    </footnotes>

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

    <ownerSignature>
        <signatureName>THE NATIONAL COMMERCIAL BANK
By: /s/ Ali Shubbar
Name: Ali Shubbar
Title: Head, Treasury Operations &amp; Bahrain Operations</signatureName>
        <signatureDate>2019-10-29</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>THE NATIONAL COMMERCIAL BANK
By: /s/ Reem Al-Majed
Name: Reem Al-Majed
Title: Treasurer, Bahrain Branch</signatureName>
        <signatureDate>2019-10-29</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>NCB CAPITAL COMPANY
By: /s/ Wisam Fasihaldin
Name: Wisam Fasihaldin
Title: Chief Finance Officer</signatureName>
        <signatureDate>2019-10-29</signatureDate>
    </ownerSignature>
</ownershipDocument>
