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>Affiliate</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common</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>8622</noOfUnitsSold>
        <aggregateMarketValue>1482811.56</aggregateMarketValue>
        <noOfUnitsOutstanding>29813967</noOfUnitsOutstanding>
        <approxSaleDate>08/16/2024</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>03/05/2024</acquiredDate>
        <natureOfAcquisitionTransaction>RSU vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>8622</amountOfSecuritiesAcquired>
        <paymentDate>03/05/2024</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>08/16/2024</noticeDate>
        <signature>/s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Rizwan M. Jamal</signature>
      </noticeSignature>
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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
  Affiliate
  Common
  J.P. Morgan Securities LLC
  390 Madison Avenue - 6th Floor
  New York
  NY
  10017
  8622
  1482811.56
  29813967
  08/16/2024
  NYSE
  Common
  03/05/2024
  RSU vesting
  Issuer
  N
  8622
  03/05/2024
  Compensation
  Y
  08/16/2024
  /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Rizwan M. Jamal