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

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2024-09-25</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001709941</issuerCik>
        <issuerName>BioAge Labs, Inc.</issuerName>
        <issuerTradingSymbol>BIOA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001583977</rptOwnerCik>
            <rptOwnerName>Cormorant Asset Management, LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>200 CLARENDON STREET</rptOwnerStreet1>
            <rptOwnerStreet2>52ND FLOOR</rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001871297</rptOwnerCik>
            <rptOwnerName>Cormorant Private Healthcare Fund IV LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>200 CLARENDON STREET</rptOwnerStreet1>
            <rptOwnerStreet2>52ND FLOOR</rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001969296</rptOwnerCik>
            <rptOwnerName>Cormorant Private Healthcare Fund V LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>200 CLARENDON STREET</rptOwnerStreet1>
            <rptOwnerStreet2>52ND FLOOR</rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001599214</rptOwnerCik>
            <rptOwnerName>Chen Bihua</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CORMORANT ASSET MANAGEMENT, LP</rptOwnerStreet1>
            <rptOwnerStreet2>200 CLARENDON STREET, 52ND FLOOR</rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Series D Redeemable Convertible Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>5263772</value>
                    <footnoteId id="F2"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Each share of the Series D Redeemable Convertible Preferred Stock (&quot;Series D Preferred Stock&quot;) is currently convertible into, and upon the closing of the Issuer's initial public offering of Common Stock will automatically convert into, 0.224084614 shares of Common Stock.  The Series D Preferred Stock has no expiration date.</footnote>
        <footnote id="F2">Represents (i) 173,704 shares of Series D Preferred Stock beneficially owned by the Master Fund (defined below), (ii) 2,769,271 shares of Series D Preferred Stock beneficially owned by Fund IV (defined below) and (iii) 2,320,797 shares of Series D Preferred Stock beneficially owned by Fund V (defined below).</footnote>
        <footnote id="F3">Cormorant Asset Management, LP (&quot;Cormorant&quot;) serves as the investment manager of Cormorant Global Healthcare Master Fund, LP (the &quot;Master Fund&quot;), Cormorant Private Healthcare Fund IV, LP (&quot;Fund IV&quot;) and Cormorant Private Healthcare Fund V, LP (&quot;Fund V&quot;). Cormorant Global Healthcare GP, LLC (&quot;GP LLC&quot;), Cormorant Private Healthcare GP IV, LLC (&quot;GP IV&quot;) and Cormorant Private Healthcare GP V, LLC (&quot;GP V&quot;) serve as General Partner of the Master Fund, Fund IV and Fund V, respectively. Bihua Chen serves as manager of Cormorant, GP LLC, GP IV  and GP V. Each of the Reporting Persons disclaims beneficial ownership of the shares reported herein except to the extent of its or her pecuniary interest therein, and the filing of this Form 3 shall not be construed as an admission that any of the Reporting Persons is the beneficial owner of any such shares for purposes of Section 16(a) of the Securities Exchange Act of 1934 or for any other purpose.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>CORMORANT ASSET MANAGEMENT, LP By: /s/ Bihua Chen, Managing Member</signatureName>
        <signatureDate>2024-09-25</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>CORMORANT PRIVATE HEALTHCARE FUND IV, LP  By: Cormorant Private Healthcare GP IV, LLC, its General Partner By: /s/ Bihua Chen, Managing Member</signatureName>
        <signatureDate>2024-09-25</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>CORMORANT PRIVATE HEALTHCARE FUND V, LP By: Cormorant Private Healthcare GP V, LLC, its General Partner By: /s/ Bihua Chen, Managing Member</signatureName>
        <signatureDate>2024-09-25</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>BIHUA CHEN By: /s/ Bihua Chen, Individually</signatureName>
        <signatureDate>2024-09-25</signatureDate>
    </ownerSignature>
</ownershipDocument>
