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<edgarSubmission xsi:schemaLocation="http://www.sec.gov/edgar/thirteenffiler eis_13F_Filer.xsd" xmlns="http://www.sec.gov/edgar/thirteenffiler" xmlns:common="http://www.sec.gov/edgar/common" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <!--Generated by CompSci Transform (tm) - http://www.compsciresources.com-->
  <!--Created: Fri Nov 14 16:29:45 UTC 2025-->
  <schemaVersion>X0202</schemaVersion>
  <headerData>
    <submissionType>13F-HR</submissionType>
    <filerInfo>
      <liveTestFlag>LIVE</liveTestFlag>
      <filer>
        <credentials>
          <cik>0001017918</cik>
          <ccc>XXXXXXXX</ccc>
        </credentials>
      </filer>
      <periodOfReport>09-30-2025</periodOfReport>
    </filerInfo>
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    <coverPage>
      <reportCalendarOrQuarter>09-30-2025</reportCalendarOrQuarter>
      <filingManager>
        <name>BAMCO INC /NY/</name>
        <address>
          <common:street1>767 FIFTH AVENUE</common:street1>
          <common:street2>49TH FL</common:street2>
          <common:city>NEW YORK</common:city>
          <common:stateOrCountry>NY</common:stateOrCountry>
          <common:zipCode>10153</common:zipCode>
        </address>
      </filingManager>
      <reportType>13F HOLDINGS REPORT</reportType>
      <form13FFileNumber>028-04011</form13FFileNumber>
      <crdNumber>000110789</crdNumber>
      <secFileNumber>801-29080</secFileNumber>
      <provideInfoForInstruction5>N</provideInfoForInstruction5>
    </coverPage>
    <signatureBlock>
      <name>Jane Liang</name>
      <title>Chief Financial Officer</title>
      <phone>212-583-2000</phone>
      <signature>Jane Liang</signature>
      <city>NEW YORK</city>
      <stateOrCountry>NY</stateOrCountry>
      <signatureDate>11-14-2025</signatureDate>
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      <tableEntryTotal>330</tableEntryTotal>
      <tableValueTotal>37713129494</tableValueTotal>
      <otherManagers2Info>
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          <sequenceNumber>1</sequenceNumber>
          <otherManager>
            <cik>0000790504  </cik>
            <form13FFileNumber>028-01678</form13FFileNumber>
            <crdNumber>000110791</crdNumber>
            <secFileNumber>801-18656</secFileNumber>
            <name>BARON CAPITAL MANAGEMENT INC /NY/</name>
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        <otherManager2>
          <sequenceNumber>2</sequenceNumber>
          <otherManager>
            <cik>0001077479</cik>
            <form13FFileNumber>028-04547</form13FFileNumber>
            <crdNumber>000111091</crdNumber>
            <secFileNumber>028-04547</secFileNumber>
            <name>VOYA INVESTMENTS, LLC</name>
          </otherManager>
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</edgarSubmission>
