content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
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      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001977046</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
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      <issuerInfo>
        <issuerCik>0001015328</issuerCik>
        <issuerName>Wintrust Financial Corporation</issuerName>
        <secFileNumber>001-35077</secFileNumber>
        <issuerAddress>
          <com:street1>9700 West Higgins Road</com:street1>
          <com:city>Rosemont</com:city>
          <com:stateOrCountry>IL</com:stateOrCountry>
          <com:zipCode>60018</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>847-939-9000</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Jeffrey D. Hahnfeld</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>EVP</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Charles Schwab &amp; Co., Inc.</name>
          <address>
            <com:street1>P.O. Box 2339</com:street1>
            <com:city>Omaha</com:city>
            <com:stateOrCountry>NE</com:stateOrCountry>
            <com:zipCode>68103</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>327</noOfUnitsSold>
        <aggregateMarketValue>45845.4</aggregateMarketValue>
        <noOfUnitsOutstanding>66500386</noOfUnitsOutstanding>
        <approxSaleDate>11/25/2024</approxSaleDate>
        <securitiesExchangeName>NASDAQ</securitiesExchangeName>
      </securitiesInformation>
      <securitiesInformation>
        <securitiesClassTitle>Comm Stock</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Equiniti Trust Company, LLC</name>
          <address>
            <com:street1>55 Challenger Road, Floor 2</com:street1>
            <com:city>Ridgefield Park</com:city>
            <com:stateOrCountry>NJ</com:stateOrCountry>
            <com:zipCode>07660</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>158</noOfUnitsSold>
        <aggregateMarketValue>22151.6</aggregateMarketValue>
        <noOfUnitsOutstanding>66500386</noOfUnitsOutstanding>
        <approxSaleDate>11/25/2024</approxSaleDate>
        <securitiesExchangeName>NASDAQ</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>01/25/2005</acquiredDate>
        <natureOfAcquisitionTransaction>Equity Grant</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Wintrust Financial Corporation</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>25</amountOfSecuritiesAcquired>
        <paymentDate>01/25/2005</paymentDate>
        <natureOfPayment>Equity Grant</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>01/23/2007</acquiredDate>
        <natureOfAcquisitionTransaction>Equity Grant</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Wintrust Financial Corporation</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>97</amountOfSecuritiesAcquired>
        <paymentDate>01/23/2007</paymentDate>
        <natureOfPayment>Equity Grant</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>01/23/2014</acquiredDate>
        <natureOfAcquisitionTransaction>Equity Grant</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Wintrust Financial Corporation</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>148</amountOfSecuritiesAcquired>
        <paymentDate>01/23/2014</paymentDate>
        <natureOfPayment>Equity Grant</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>01/22/2015</acquiredDate>
        <natureOfAcquisitionTransaction>Equity Grant</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Wintrust Financial Corporation</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>57</amountOfSecuritiesAcquired>
        <paymentDate>01/22/2015</paymentDate>
        <natureOfPayment>Equity Grant</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>04/22/2021</acquiredDate>
        <natureOfAcquisitionTransaction>Equity Grant</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Wintrust Financial Corporation</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>157</amountOfSecuritiesAcquired>
        <paymentDate>04/22/2021</paymentDate>
        <natureOfPayment>Equity Grant</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>01/22/2015</acquiredDate>
        <natureOfAcquisitionTransaction>Equity Grant</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Wintrust Financial Corporation</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>1</amountOfSecuritiesAcquired>
        <paymentDate>01/22/2015</paymentDate>
        <natureOfPayment>Equity Grant</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>11/25/2024</noticeDate>
        <signature>/s/Jeffrey D. Hahnfeld</signature>
      </noticeSignature>
    </formData>
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text: 144
  0001977046
  XXXXXXXX
  LIVE
  0001015328
  Wintrust Financial Corporation
  001-35077
  9700 West Higgins Road
  Rosemont
  IL
  60018
  847-939-9000
  Jeffrey D. Hahnfeld
  EVP
  Common Stock
  Charles Schwab & Co., Inc.
  P.O. Box 2339
  Omaha
  NE
  68103
  327
  45845.4
  66500386
  11/25/2024
  NASDAQ
  Comm Stock
  Equiniti Trust Company, LLC
  55 Challenger Road, Floor 2
  Ridgefield Park
  NJ
  07660
  158
  22151.6
  66500386
  11/25/2024
  NASDAQ
  Common Stock
  01/25/2005
  Equity Grant
  Wintrust Financial Corporation
  N
  25
  01/25/2005
  Equity Grant
  Common Stock
  01/23/2007
  Equity Grant
  Wintrust Financial Corporation
  N
  97
  01/23/2007
  Equity Grant
  Common Stock
  01/23/2014
  Equity Grant
  Wintrust Financial Corporation
  N
  148
  01/23/2014
  Equity Grant
  Common Stock
  01/22/2015
  Equity Grant
  Wintrust Financial Corporation
  N
  57
  01/22/2015
  Equity Grant
  Common Stock
  04/22/2021
  Equity Grant
  Wintrust Financial Corporation
  N
  157
  04/22/2021
  Equity Grant
  Common Stock
  01/22/2015
  Equity Grant
  Wintrust Financial Corporation
  N
  1
  01/22/2015
  Equity Grant
  Y
  11/25/2024
  /s/Jeffrey D. Hahnfeld