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      <periodOfReport>09-30-2020</periodOfReport>
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      <reportCalendarOrQuarter>09-30-2020</reportCalendarOrQuarter>
      <filingManager>
        <name>MILLENNIUM MANAGEMENT LLC</name>
        <address>
          <com:street1>666 FIFTH AVENUE</com:street1>
          <com:street2>8TH FLOOR</com:street2>
          <com:city>NEW YORK</com:city>
          <com:stateOrCountry>NY</com:stateOrCountry>
          <com:zipCode>10103-0899</com:zipCode>
        </address>
      </filingManager>
      <reportType>13F COMBINATION REPORT</reportType>
      <form13FFileNumber>028-10684</form13FFileNumber>
      <otherManagersInfo>
        <otherManager>
          <cik>0001745981</cik>
          <form13FFileNumber>028-18889</form13FFileNumber>
          <name>WORLDQUANT MILLENNIUM ADVISORS LLC</name>
        </otherManager>
      </otherManagersInfo>
      <provideInfoForInstruction5>Y</provideInfoForInstruction5>
      <additionalInformation>Each of the holdings described below is held directly or indirectly by Millennium Partners, L.P. or one or more affiliated investment funds that invest a portion of their assets in Millennium Partners, L.P. The Other Included Managers Nos. 1 and 2 and the Other Manager Reporting for this Manager described herein are relying advisers (as defined under the SEC's Form ADV) of the Institutional Investment Manager filing this report (the "Institutional Investment Manager"). Certain holdings included in this report involve discretion exercised by other relying advisers of the Institutional Investment Manager that are not separately identified on this report. In addition, certain holdings included in this report are reported in the holdings reports of other institutional investment managers that may be deemed to have investment discretion over such holdings, but on whose behalf the Institutional Investment Manager is not filing this report.</additionalInformation>
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    <signatureBlock>
      <name>Gil Raviv</name>
      <title>Global General Counsel</title>
      <phone>212-841-4100</phone>
      <signature>/s/ Gil Raviv</signature>
      <city>New York</city>
      <stateOrCountry>NY</stateOrCountry>
      <signatureDate>11-16-2020</signatureDate>
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            <name>MILLENNIUM INTERNATIONAL MANAGEMENT LP</name>
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          <otherManager>
            <cik>0001426818</cik>
            <form13FFileNumber>028-12858</form13FFileNumber>
            <name>MILLENNIUM GLOBAL ESTATE GP LLC</name>
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