content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <!-- Generated by Workiva -->
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001890565</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0001004434</issuerCik>
        <issuerName>Affiliated Managers Group, Inc.</issuerName>
        <secFileNumber>001-13459</secFileNumber>
        <issuerAddress>
          <com:street1>777 South Flagler Drive</com:street1>
          <com:city>West Palm Beach</com:city>
          <com:stateOrCountry>FL</com:stateOrCountry>
          <com:zipCode>33401</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>800-345-1100</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Rizwan M. Jamal</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Former Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>J.P. Morgan Securities LLC</name>
          <address>
            <com:street1>390 Madison Avenue - 6th Floor</com:street1>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10017</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>14669</noOfUnitsSold>
        <aggregateMarketValue>2295258</aggregateMarketValue>
        <noOfUnitsOutstanding>29257014</noOfUnitsOutstanding>
        <approxSaleDate>03/10/2025</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>10/15/2024</acquiredDate>
        <natureOfAcquisitionTransaction>Transfer to Rizwan M. Jamal Revocable Trust</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Rizwan M. Jamal, who acquired the shares through compensation on 08/15/24</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>7335</amountOfSecuritiesAcquired>
        <paymentDate>10/15/2024</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>10/16/2024</acquiredDate>
        <natureOfAcquisitionTransaction>Transfer to Julianna R. Jamal Revocable Trust</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Rizwan M. Jamal, who acquired the shares through compensation on 08/15/24</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>3505</amountOfSecuritiesAcquired>
        <paymentDate>10/16/2024</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>11/14/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Transfer to Julianna R. Jamal Revocable Trust</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Rizwan M. Jamal, who acquired the shares through compensation on 11/04/21</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>3829</amountOfSecuritiesAcquired>
        <paymentDate>11/14/2023</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <remarks>Of the shares filed today, 7,335 shares will be sold by the Rizwan M. Jamal Revocable Trust, Rizwan M. Jamal as Trustee and 7,334 shares will be sold by the Julianna R. Jamal Revocable Trust, Rizwan M. Jamal as Trustee.</remarks>
      <noticeSignature>
        <noticeDate>03/10/2025</noticeDate>
        <signature>/s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Rizwan M. Jamal</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 4427}]
text: 144
  0001890565
  XXXXXXXX
  LIVE
  0001004434
  Affiliated Managers Group, Inc.
  001-13459
  777 South Flagler Drive
  West Palm Beach
  FL
  33401
  800-345-1100
  Rizwan M. Jamal
  Former Officer
  Common Stock
  J.P. Morgan Securities LLC
  390 Madison Avenue - 6th Floor
  New York
  NY
  10017
  14669
  2295258
  29257014
  03/10/2025
  NYSE
  Common Stock
  10/15/2024
  Transfer to Rizwan M. Jamal Revocable Trust
  Rizwan M. Jamal, who acquired the shares through compensation on 08/15/24
  N
  7335
  10/15/2024
  N/A
  Common Stock
  10/16/2024
  Transfer to Julianna R. Jamal Revocable Trust
  Rizwan M. Jamal, who acquired the shares through compensation on 08/15/24
  N
  3505
  10/16/2024
  N/A
  Common Stock
  11/14/2023
  Transfer to Julianna R. Jamal Revocable Trust
  Rizwan M. Jamal, who acquired the shares through compensation on 11/04/21
  N
  3829
  11/14/2023
  N/A
  Y
  Of the shares filed today, 7,335 shares will be sold by the Rizwan M. Jamal Revocable Trust, Rizwan M. Jamal as Trustee and 7,334 shares will be sold by the Julianna R. Jamal Revocable Trust, Rizwan M. Jamal as Trustee.
  03/10/2025
  /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Rizwan M. Jamal