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        <filer>
          <filerCredentials>
            <cik>0001804778</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
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      <issuerInfo>
        <issuerCik>0001144215</issuerCik>
        <issuerName>ACUITY BRANDS INC</issuerName>
        <secFileNumber>001-16583</secFileNumber>
        <issuerAddress>
          <com:street1>1170 PEACHTREE STREET NE</com:street1>
          <com:street2>SUITE 1200</com:street2>
          <com:city>ATLANTA</com:city>
          <com:stateOrCountry>GA</com:stateOrCountry>
          <com:zipCode>30309</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>404-853-1400</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>MILLS DIANNE S</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Merrill Lynch</name>
          <address>
            <com:street1>3455 Peachtree Rd NE</com:street1>
            <com:street2>Suite 1000</com:street2>
            <com:city>Atlanta</com:city>
            <com:stateOrCountry>GA</com:stateOrCountry>
            <com:zipCode>30326</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>6000</noOfUnitsSold>
        <aggregateMarketValue>1350670.00</aggregateMarketValue>
        <noOfUnitsOutstanding>30816757</noOfUnitsOutstanding>
        <approxSaleDate>01/18/2024</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>03/02/2021</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of a Stock Award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Acuity Brands INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>713</amountOfSecuritiesAcquired>
        <paymentDate>03/02/2021</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>10/26/2021</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of a Stock Award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Acuity Brands INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>413</amountOfSecuritiesAcquired>
        <paymentDate>10/26/2021</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>03/02/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of a Stock Award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Acuity Brands INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>719</amountOfSecuritiesAcquired>
        <paymentDate>03/02/2022</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>10/25/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of a Stock Award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Acuity Brands INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>609</amountOfSecuritiesAcquired>
        <paymentDate>10/25/2022</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>10/26/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of a Stock Award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Acuity Brands INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>414</amountOfSecuritiesAcquired>
        <paymentDate>10/26/2022</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>03/02/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of a Stock Award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Acuity Brands INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>718</amountOfSecuritiesAcquired>
        <paymentDate>03/02/2023</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>10/24/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of a Stock Award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Acuity Brands INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>568</amountOfSecuritiesAcquired>
        <paymentDate>10/24/2023</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>10/25/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of a Stock Award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Acuity Brands INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>608</amountOfSecuritiesAcquired>
        <paymentDate>10/25/2023</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>10/26/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of a Stock Award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Acuity Brands INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>1238</amountOfSecuritiesAcquired>
        <paymentDate>10/26/2023</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>01/18/2024</noticeDate>
        <signature>Dianne S. Mills</signature>
      </noticeSignature>
    </formData>
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metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 7262}]
text: 144
  0001804778
  XXXXXXXX
  LIVE
  0001144215
  ACUITY BRANDS INC
  001-16583
  1170 PEACHTREE STREET NE
  SUITE 1200
  ATLANTA
  GA
  30309
  404-853-1400
  MILLS DIANNE S
  Officer
  Common
  Merrill Lynch
  3455 Peachtree Rd NE
  Suite 1000
  Atlanta
  GA
  30326
  6000
  1350670.00
  30816757
  01/18/2024
  NYSE
  Common
  03/02/2021
  Vesting of a Stock Award
  Acuity Brands INC
  N
  713
  03/02/2021
  Compensatory Payment
  Common
  10/26/2021
  Vesting of a Stock Award
  Acuity Brands INC
  N
  413
  10/26/2021
  Compensatory Payment
  Common
  03/02/2022
  Vesting of a Stock Award
  Acuity Brands INC
  N
  719
  03/02/2022
  Compensatory Payment
  Common
  10/25/2022
  Vesting of a Stock Award
  Acuity Brands INC
  N
  609
  10/25/2022
  Compensatory Payment
  Common
  10/26/2022
  Vesting of a Stock Award
  Acuity Brands INC
  N
  414
  10/26/2022
  Compensatory Payment
  Common
  03/02/2023
  Vesting of a Stock Award
  Acuity Brands INC
  N
  718
  03/02/2023
  Compensatory Payment
  Common
  10/24/2023
  Vesting of a Stock Award
  Acuity Brands INC
  N
  568
  10/24/2023
  Compensatory Payment
  Common
  10/25/2023
  Vesting of a Stock Award
  Acuity Brands INC
  N
  608
  10/25/2023
  Compensatory Payment
  Common
  10/26/2023
  Vesting of a Stock Award
  Acuity Brands INC
  N
  1238
  10/26/2023
  Compensatory Payment
  Y
  01/18/2024
  Dianne S. Mills