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

    <schemaVersion>X0609</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2026-03-25</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001469395</issuerCik>
        <issuerName>Pampa Energy Inc.</issuerName>
        <issuerTradingSymbol>PAM</issuerTradingSymbol>
        <issuerForeignTradingSymbol>PAMP</issuerForeignTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002118099</rptOwnerCik>
            <rptOwnerName>Sigwald Carolina</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>true</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>MAIPU 1</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BUENOS AIRES</rptOwnerCity>
            <rptOwnerNonUSStateTerritory></rptOwnerNonUSStateTerritory>
            <rptOwnerCountry>C1</rptOwnerCountry>
            <rptOwnerZipCode>C1084</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP legal affairs</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Common Stock, $25 Par Value</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>176281</value>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2026-03-25</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2026-03-27</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>49933</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>176281</value>
                    <footnoteId id="F3"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2026-03-25</value>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F4"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>PAMP</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>49933</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>295773</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">These shares were acquired at a price of AR$ 4,942.50 per share. For reporting purposes the exercise price has been converted to US dollars based on the exchange rate reported by Banco de la Nacion Argentina for the date of acquisition, which was US$1.00 = AR$ 1,400</footnote>
        <footnote id="F2">The total contains 160,923 common stocks and 5,394 ADRs</footnote>
        <footnote id="F3">These shares were acquired at a price of AR$4,942.50 per share. For reporting purposes the exercise price has been converted to US dollars based on the exchange rate reported by Banco de la Nacion Argentina for the date of acquisition which was US$1.00 = AR$ 1,400</footnote>
        <footnote id="F4">Not applicable</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Carolina Sigwald</signatureName>
        <signatureDate>2026-04-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
