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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-12-17</periodOfReport>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001761489</rptOwnerCik>
            <rptOwnerName>Saudi National Bank</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>KING ABDULAZIZ 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>SNB Capital Co</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>4TH FLOOR TOWER B, SNB 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>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001838758</rptOwnerCik>
            <rptOwnerName>NCB CAPITAL CREDIT FUND I L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O NCB CAPITAL CREDIT FUND I GP CO.</rptOwnerStreet1>
            <rptOwnerStreet2>WALKERS CORPORATE LIMITED, 190 ELGIN AVE</rptOwnerStreet2>
            <rptOwnerCity>GEORGE TOWN, GRAND CAYMAN</rptOwnerCity>
            <rptOwnerState>E9</rptOwnerState>
            <rptOwnerZipCode>KY1-9008</rptOwnerZipCode>
            <rptOwnerStateDescription>CAYMAN ISLANDS</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001838757</rptOwnerCik>
            <rptOwnerName>NCB Capital Credit Fund I GP Co.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>WALKERS CORPORATE LIMITED</rptOwnerStreet1>
            <rptOwnerStreet2>190 ELGIN AVE</rptOwnerStreet2>
            <rptOwnerCity>GEORGE TOWN, GRAND CAYMAN</rptOwnerCity>
            <rptOwnerState>E9</rptOwnerState>
            <rptOwnerZipCode>KY1-9008</rptOwnerZipCode>
            <rptOwnerStateDescription>CAYMAN ISLANDS</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-12-17</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>32963</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>20.9</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>601518.781</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See notes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-12-17</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>507129</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>20.9</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>524912.721</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>8729222.13</value>
                    <footnoteId id="F4"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See note</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9855653.632</value>
                    <footnoteId id="F5"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See note</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents 32,963 shares of common stock of the Issuer acquired by SNB Capital Company (f/k/a NCB Capital Company) (&quot;SNBCC&quot;) on December 17, 2021, which will be issued on or around December 30, 2021.</footnote>
        <footnote id="F2">Represents 507,129 shares of common stock of the Issuer acquired by the Reporting Person on December 17, 2021, which will be issued on or around December 30, 2021.</footnote>
        <footnote id="F3">This statement is being filed by the following Reporting Persons: Saudi National Bank, the parent entity of SNBCC, which in turn is the sole shareholder of NCB Capital Credit Fund I GP Co., the general partner of the NCB Capital Credit Fund I L.P (&quot;Credit Fund&quot;).</footnote>
        <footnote id="F4">Represents shares of common stock of the Issuer directly held by the Credit Fund.</footnote>
        <footnote id="F5">After giving effect to the transaction reported on this Form 4, the aggregate number of shares beneficially owned by SNB is 9,855,653.632, which includes the shares of common stock of the Issuer directly owned by each of SNBCC and the Credit Fund and its general partner.  Each of the Reporting Persons disclaims beneficial ownership of all shares of the Issuer for the purposes of Section 16 or for any other purpose, except to the extent of such pecuniary interest therein.</footnote>
    </footnotes>

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

    <ownerSignature>
        <signatureName>See Exhibit 99.1 for Signatures incorporated herein by reference</signatureName>
        <signatureDate>2021-12-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
