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

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2026-01-15</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0002084396</issuerCik>
        <issuerName>Infinite Eagle Acquisition Corp.</issuerName>
        <issuerTradingSymbol>IEAG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002098586</rptOwnerCik>
            <rptOwnerName>Eagle Equity Partners VI, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O INFINITE EAGLE ACQUISITION CORP.</rptOwnerStreet1>
            <rptOwnerStreet2>955 FIFTH AVENUE</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10075</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Director by Deputization</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Ordinary Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2026-01-15</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>350000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>10</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>350000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Eagle Equity Partners VI, LLC is the record holder of the securities reported herein. Harry Sloan, Eli Baker and Jeff Sagansky are the managing members of Eagle Equity Partners VI, LLC. Each of Messrs. Sloan, Baker and Sagansky disclaims any beneficial ownership of the securities held by Eagle Equity Partner VI, LLC other than to the extent of any pecuniary interest they may have therein, directly or indirectly.</footnote>
    </footnotes>

    <remarks>Messrs. Sloan, Baker and Sagansky serve on the Board of Directors of the Issuer and Mr. Baker is also the Chief Executive Officer of the Issuer. Eagle Equity Partners VI, LLC may be deemed to be a director by deputization as a result of the service of Messrs. Sloan, Baker and Sagansky.</remarks>

    <ownerSignature>
        <signatureName>/s/ Daniel Nussen, Attorney-in-Fact for Eagle Equity Partners VI, LLC</signatureName>
        <signatureDate>2026-01-20</signatureDate>
    </ownerSignature>
</ownershipDocument>
