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

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2024-01-16</periodOfReport>

    <issuer>
        <issuerCik>0001780312</issuerCik>
        <issuerName>AST SpaceMobile, Inc.</issuerName>
        <issuerTradingSymbol>ASTS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001855428</rptOwnerCik>
            <rptOwnerName>Vodafone Ventures Ltd</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>VODAFONE HOUSE</rptOwnerStreet1>
            <rptOwnerStreet2>THE CONNECTION</rptOwnerStreet2>
            <rptOwnerCity>NEWBURY</rptOwnerCity>
            <rptOwnerState>X0</rptOwnerState>
            <rptOwnerZipCode>RG142FN</rptOwnerZipCode>
            <rptOwnerStateDescription>UNITED KINGDOM</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000839923</rptOwnerCik>
            <rptOwnerName>VODAFONE GROUP PUBLIC LTD CO</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>VODAFONE HOUSE</rptOwnerStreet1>
            <rptOwnerStreet2>THE CONNECTION</rptOwnerStreet2>
            <rptOwnerCity>NEWBURY</rptOwnerCity>
            <rptOwnerState>X0</rptOwnerState>
            <rptOwnerZipCode>RG142FN</rptOwnerZipCode>
            <rptOwnerStateDescription>UNITED KINGDOM</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>5.5% Convertible Note due 2034</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>5.75</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2024-01-16</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>25000000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>25000000</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2025-01-16</value>
            </exerciseDate>
            <expirationDate>
                <value>2034-01-16</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>4347826</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>25000000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <remarks>The Reporting Persons may be deemed to be members of a group for the purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, that collectively beneficially owns more than 10% of the Class A Common Stock of the Issuer. The Reporting Persons expressly disclaim beneficial ownership of any securities of the Issuer owned by any persons other than the Reporting Persons.</remarks>

    <ownerSignature>
        <signatureName>/s/ Edward Verner, M&amp;A Executive, Vodafone Ventures Limited</signatureName>
        <signatureDate>2024-01-18</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Maaike de Bie, Group General Counsel and Company Secretary, Vodafone Group Plc</signatureName>
        <signatureDate>2024-01-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
