content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
  <submissionType>144</submissionType>
  <filerInfo>
  <filer>
  <filerCredentials>
  <cik>0001614103</cik>
  <ccc>XXXXXXXX</ccc>
  </filerCredentials>
  </filer>
  <liveTestFlag>LIVE</liveTestFlag>
  
  
  
  </filerInfo>
  </headerData>
  <formData>
  <issuerInfo>
  <issuerCik>0001481582</issuerCik>
  <issuerName>Ryerson Holding Corporation</issuerName>
  <secFileNumber>001-34735</secFileNumber>
  <issuerAddress>
  <com:street1>227 W. MONROE ST., 27TH FLOOR</com:street1>
  <com:city>CHICAGO</com:city>
  <com:stateOrCountry>IL</com:stateOrCountry>
  <com:zipCode>60606</com:zipCode>
  </issuerAddress>
  <issuerContactPhone>312-292-5000</issuerContactPhone>
  <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Lehner Edward J.</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
  <relationshipsToIssuer>
  <relationshipToIssuer>Officer</relationshipToIssuer>
  </relationshipsToIssuer>
  </issuerInfo>
  <securitiesInformation>
  <securitiesClassTitle>COMMON</securitiesClassTitle>
  <brokerOrMarketmakerDetails>
  <name>Morgan Stanley Smith Barney LLC Executive Services</name>
  <address>
  <com:street1>200 W Civic Center Dr - 4th Floor</com:street1>
  <com:city>Sandy</com:city>
  <com:stateOrCountry>UT</com:stateOrCountry>
  <com:zipCode>84070</com:zipCode>
  </address>
  </brokerOrMarketmakerDetails>
  <noOfUnitsSold>10000</noOfUnitsSold>
  <aggregateMarketValue>247931</aggregateMarketValue>
  <noOfUnitsOutstanding>31850903</noOfUnitsOutstanding>
  <approxSaleDate>03/05/2025</approxSaleDate>
  <securitiesExchangeName>NYSE</securitiesExchangeName>
  </securitiesInformation>
  <securitiesToBeSold>
  <securitiesClassTitle>COMMON</securitiesClassTitle>
  <acquiredDate>03/31/2020</acquiredDate>
  <natureOfAcquisitionTransaction>PERFORMANCE SHARES</natureOfAcquisitionTransaction>
  <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
  <isGiftTransaction>N</isGiftTransaction>
  <amountOfSecuritiesAcquired>10000</amountOfSecuritiesAcquired>
  <paymentDate>03/31/2020</paymentDate>
  <natureOfPayment>Compensation</natureOfPayment>
  </securitiesToBeSold>
  <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
  <noticeSignature>
  <noticeDate>03/07/2025</noticeDate>
  <signature>/s/ Edward J Lehner</signature>
  </noticeSignature>
  </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 2386}]
text: 144
  0001614103
  XXXXXXXX
  LIVE
  0001481582
  Ryerson Holding Corporation
  001-34735
  227 W. MONROE ST., 27TH FLOOR
  CHICAGO
  IL
  60606
  312-292-5000
  Lehner Edward J.
  Officer
  COMMON
  Morgan Stanley Smith Barney LLC Executive Services
  200 W Civic Center Dr - 4th Floor
  Sandy
  UT
  84070
  10000
  247931
  31850903
  03/05/2025
  NYSE
  COMMON
  03/31/2020
  PERFORMANCE SHARES
  Issuer
  N
  10000
  03/31/2020
  Compensation
  Y
  03/07/2025
  /s/ Edward J Lehner