<SUBMISSION>
<ACCESSION-NUMBER>0001035440-07-000001
<TYPE>5
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20061231
<FILING-DATE>20070209
<DATE-OF-FILING-DATE-CHANGE>20070209
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>AKAMAI TECHNOLOGIES INC
<CIK>0001086222
<ASSIGNED-SIC>7389
<IRS-NUMBER>043432319
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>8 CAMBRIDGE CENTER
<CITY>CAMBRIDGE
<STATE>MA
<ZIP>02142
<PHONE>6174443000
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>8 CAMBRIDGE CENTER
<CITY>CAMBRIDGE
<STATE>MA
<ZIP>02142
</MAIL-ADDRESS>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>CONRADES GEORGE H
<CIK>0001106231
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>5
<ACT>34
<FILE-NUMBER>000-27275
<FILM-NUMBER>07598704
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>C/O AKAMAI TECHNOLOGIES INC
<STREET2>8 CAMBRIDGE CENTER
<CITY>CAMBRIDGE
<STATE>MA
<ZIP>02139
<PHONE>6172503000
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>500 TECHNOLOGY SQUARE
<STREET2>FIFTH FLOOR
<CITY>CAMBRIDGE
<STATE>MA
<ZIP>02139
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>5
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>5</documentType>

    <periodOfReport>2006-12-31</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <form3HoldingsReported>0</form3HoldingsReported>

    <form4TransactionsReported>0</form4TransactionsReported>

    <issuer>
        <issuerCik>0001086222</issuerCik>
        <issuerName>AKAMAI TECHNOLOGIES INC</issuerName>
        <issuerTradingSymbol>AKAM</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001106231</rptOwnerCik>
            <rptOwnerName>CONRADES GEORGE H</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>8 CAMBRIDGE CENTER</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02142</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Executive Chairman</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value $.01 per share</value>
            </securityTitle>
            <transactionDate>
                <value>2006-09-18</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>5</transactionFormType>
                <transactionCode>G</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>26500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>760687</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value $.01 per share</value>
            </securityTitle>
            <transactionDate>
                <value>2006-12-08</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>5</transactionFormType>
                <transactionCode>G</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>37500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>723187</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Shares were gifted to Ohio Wesleyan University.</footnote>
        <footnote id="F2">Shares were gifted to the Goldman Sachs Philanthropy Fund.</footnote>
        <footnote id="F3">Includes 1,556 shares that were distributed in respect of deferred stock units in November 2006.  The Form 4 reporting such distribution erroneously stated that 1,561 shares had been distributed.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ George H. Conrades</signatureName>
        <signatureDate>2007-01-21</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
