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

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2026-02-25</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0002077033</issuerCik>
        <issuerName>Miluna Acquisition Corp</issuerName>
        <issuerTradingSymbol>MMTX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002082086</rptOwnerCik>
            <rptOwnerName>Tsai Mei Chi</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O MILUNA ACQUISITION CORP 12F, NO. 43,</rptOwnerStreet1>
            <rptOwnerStreet2>CHENG GONG ROAD, SEC 4, NEIHU</rptOwnerStreet2>
            <rptOwnerCity>TAIPEI</rptOwnerCity>
            <rptOwnerState>F5</rptOwnerState>
            <rptOwnerZipCode>114202</rptOwnerZipCode>
            <rptOwnerStateDescription>TAIWAN</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>See Remarks</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Ordinary Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2026-02-25</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>10000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">On February 17, 2026, Ms. Mei Chi Tsai resigned as a director of Miluna Acquisition Corp (the &quot;Issuer&quot;), and Ms. Yajuan Ding was subsequently appointed as a director of the Issuer on February 25, 2026. In connection with the transition, Ms. Tsai transferred 10,000 ordinary shares of the Issuer to MilunaC Technology Limited (the &quot;Sponsor&quot;) without consideration, and the Sponsor subsequently transferred those shares to Ms. Ding for $1, pursuant to the executed share transfer agreements.</footnote>
    </footnotes>

    <remarks>On February 17, 2026, Ms. Mei Chi Tsai resigned as a director of the Issuer.</remarks>

    <ownerSignature>
        <signatureName>/s/ Mei Chi Tsai, Name: Mei Chi Tsai</signatureName>
        <signatureDate>2026-02-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
