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      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001492719</cik>
            <ccc>XXXXXXXX</ccc>
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        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
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        <issuerCik>0000771497</issuerCik>
        <issuerName>ABM INDUSTRIES INC /DE/</issuerName>
        <secFileNumber>001-08929</secFileNumber>
        <issuerAddress>
          <com:street1>ONE LIBERTY PLAZA</com:street1>
          <com:street2>7TH FLOOR</com:street2>
          <com:city>NEW YORK</com:city>
          <com:stateOrCountry>NY</com:stateOrCountry>
          <com:zipCode>10006</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>212 297-0200</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>CHIN DEAN A</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Merrill Lynch</name>
          <address>
            <com:street1>225 Liberty St</com:street1>
            <com:street2>Floor 37</com:street2>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10281</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>4281</noOfUnitsSold>
        <aggregateMarketValue>224136.26</aggregateMarketValue>
        <noOfUnitsOutstanding>62203371</noOfUnitsOutstanding>
        <approxSaleDate>01/14/2025</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>01/07/2024</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of restricted stock unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>ABM INDUSTRIES INC /DE/</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>352</amountOfSecuritiesAcquired>
        <paymentDate>01/07/2024</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>01/08/2024</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of restricted stock unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>ABM INDUSTRIES INC /DE/</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>643</amountOfSecuritiesAcquired>
        <paymentDate>01/08/2024</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>01/08/2024</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of performance share unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>ABM INDUSTRIES INC /DE/</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>2922</amountOfSecuritiesAcquired>
        <paymentDate>01/08/2024</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>01/10/2024</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of restricted stock unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>ABM INDUSTRIES INC /DE/</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>364</amountOfSecuritiesAcquired>
        <paymentDate>01/10/2024</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>01/14/2025</noticeDate>
        <signature>DEAN CHIN</signature>
      </noticeSignature>
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text: 144
  0001492719
  XXXXXXXX
  LIVE
  0000771497
  ABM INDUSTRIES INC /DE/
  001-08929
  ONE LIBERTY PLAZA
  7TH FLOOR
  NEW YORK
  NY
  10006
  212 297-0200
  CHIN DEAN A
  Officer
  Common Stock
  Merrill Lynch
  225 Liberty St
  Floor 37
  New York
  NY
  10281
  4281
  224136.26
  62203371
  01/14/2025
  NYSE
  Common Stock
  01/07/2024
  Vesting of restricted stock unit award
  ABM INDUSTRIES INC /DE/
  N
  352
  01/07/2024
  Granted as part of issuer equity compensation plan
  Common Stock
  01/08/2024
  Vesting of restricted stock unit award
  ABM INDUSTRIES INC /DE/
  N
  643
  01/08/2024
  Granted as part of issuer equity compensation plan
  Common Stock
  01/08/2024
  Vesting of performance share unit award
  ABM INDUSTRIES INC /DE/
  N
  2922
  01/08/2024
  Granted as part of issuer equity compensation plan
  Common Stock
  01/10/2024
  Vesting of restricted stock unit award
  ABM INDUSTRIES INC /DE/
  N
  364
  01/10/2024
  Granted as part of issuer equity compensation plan
  Y
  01/14/2025
  DEAN CHIN