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        <filer>
          <filerCredentials>
            <cik>0001302261</cik>
            <ccc>XXXXXXXX</ccc>
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        </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>HOLCOM KAREN J</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Merrill Lynch</name>
          <address>
            <com:street1>3455 Peachtree Road NE</com:street1>
            <com:street2>STE 1000</com:street2>
            <com:city>Atlanta</com:city>
            <com:stateOrCountry>GA</com:stateOrCountry>
            <com:zipCode>30326</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>7745</noOfUnitsSold>
        <aggregateMarketValue>2031060.04</aggregateMarketValue>
        <noOfUnitsOutstanding>30797872</noOfUnitsOutstanding>
        <approxSaleDate>04/04/2024</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>04/04/2024</acquiredDate>
        <natureOfAcquisitionTransaction>Exercise of Stock Awards</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>ACUITY BRANDS INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>3489</amountOfSecuritiesAcquired>
        <paymentDate>04/04/2024</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>10/23/2015</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of a Stock Award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>ACUITY BRANDS INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>133</amountOfSecuritiesAcquired>
        <paymentDate>10/23/2015</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>10/26/2017</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of a Stock Award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>ACUITY BRANDS INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>67</amountOfSecuritiesAcquired>
        <paymentDate>10/26/2017</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>09/01/2018</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of a Stock Award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>ACUITY BRANDS INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>74</amountOfSecuritiesAcquired>
        <paymentDate>09/01/2018</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>06/01/2019</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of a Stock Award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>ACUITY BRANDS INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>147</amountOfSecuritiesAcquired>
        <paymentDate>06/01/2019</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>09/01/2019</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of a Stock Award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>ACUITY BRANDS INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>74</amountOfSecuritiesAcquired>
        <paymentDate>09/01/2019</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>10/24/2019</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of a Stock Award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>ACUITY BRANDS INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>225</amountOfSecuritiesAcquired>
        <paymentDate>10/24/2019</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>10/25/2019</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of a Stock Award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>ACUITY BRANDS INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>62</amountOfSecuritiesAcquired>
        <paymentDate>10/25/2019</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>10/26/2019</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of a Stock Award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>ACUITY BRANDS INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>71</amountOfSecuritiesAcquired>
        <paymentDate>10/26/2019</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>03/01/2021</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of a Stock Award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>ACUITY BRANDS INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>122</amountOfSecuritiesAcquired>
        <paymentDate>03/01/2021</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>03/01/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of a Stock Award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>ACUITY BRANDS INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>123</amountOfSecuritiesAcquired>
        <paymentDate>03/01/2022</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>08/20/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of a Stock Award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>ACUITY BRANDS INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>404</amountOfSecuritiesAcquired>
        <paymentDate>08/20/2022</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>10/24/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of Stock Awards</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>ACUITY BRANDS INC</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>1729</amountOfSecuritiesAcquired>
        <paymentDate>10/24/2022</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>534</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>491</amountOfSecuritiesAcquired>
        <paymentDate>10/26/2022</paymentDate>
        <natureOfPayment>Compensatory Payment</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>04/04/2024</noticeDate>
        <signature>KAREN J HOLCOM</signature>
      </noticeSignature>
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metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 10592}]
text: 144
  0001302261
  XXXXXXXX
  LIVE
  0001144215
  ACUITY BRANDS INC
  001-16583
  1170 PEACHTREE STREET NE
  SUITE 1200
  ATLANTA
  GA
  30309
  404-853-1400
  HOLCOM KAREN J
  Officer
  Common
  Merrill Lynch
  3455 Peachtree Road NE
  STE 1000
  Atlanta
  GA
  30326
  7745
  2031060.04
  30797872
  04/04/2024
  NYSE
  Common
  04/04/2024
  Exercise of Stock Awards
  ACUITY BRANDS INC
  N
  3489
  04/04/2024
  Compensatory Payment
  Common
  10/23/2015
  Vesting of a Stock Award
  ACUITY BRANDS INC
  N
  133
  10/23/2015
  Compensatory Payment
  Common
  10/26/2017
  Vesting of a Stock Award
  ACUITY BRANDS INC
  N
  67
  10/26/2017
  Compensatory Payment
  Common
  09/01/2018
  Vesting of a Stock Award
  ACUITY BRANDS INC
  N
  74
  09/01/2018
  Compensatory Payment
  Common
  06/01/2019
  Vesting of a Stock Award
  ACUITY BRANDS INC
  N
  147
  06/01/2019
  Compensatory Payment
  Common
  09/01/2019
  Vesting of a Stock Award
  ACUITY BRANDS INC
  N
  74
  09/01/2019
  Compensatory Payment
  Common
  10/24/2019
  Vesting of a Stock Award
  ACUITY BRANDS INC
  N
  225
  10/24/2019
  Compensatory Payment
  Common
  10/25/2019
  Vesting of a Stock Award
  ACUITY BRANDS INC
  N
  62
  10/25/2019
  Compensatory Payment
  Common
  10/26/2019
  Vesting of a Stock Award
  ACUITY BRANDS INC
  N
  71
  10/26/2019
  Compensatory Payment
  Common
  03/01/2021
  Vesting of a Stock Award
  ACUITY BRANDS INC
  N
  122
  03/01/2021
  Compensatory Payment
  Common
  03/01/2022
  Vesting of a Stock Award
  ACUITY BRANDS INC
  N
  123
  03/01/2022
  Compensatory Payment
  Common
  08/20/2022
  Vesting of a Stock Award
  ACUITY BRANDS INC
  N
  404
  08/20/2022
  Compensatory Payment
  Common
  10/24/2022
  Vesting of Stock Awards
  ACUITY BRANDS INC
  N
  1729
  10/24/2022
  Compensatory Payment
  Common
  10/25/2022
  Vesting of a Stock Award
  ACUITY BRANDS INC
  N
  534
  10/25/2022
  Compensatory Payment
  Common
  10/26/2022
  Vesting of a Stock Award
  ACUITY BRANDS INC
  N
  491
  10/26/2022
  Compensatory Payment
  Y
  04/04/2024
  KAREN J HOLCOM