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          <filerCredentials>
            <cik>0001244290</cik>
            <ccc>XXXXXXXX</ccc>
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        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
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        <issuerName>Wintrust Financial Corporation</issuerName>
        <secFileNumber>001-35077</secFileNumber>
        <issuerAddress>
          <com:street1>9700 West Higgins Road, Suite 800</com:street1>
          <com:city>Rosemont</com:city>
          <com:stateOrCountry>IL</com:stateOrCountry>
          <com:zipCode>60018</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>8479399000</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Edanddor Foundation</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Edward Wehmer is Founder and Chair of Foundation</relationshipToIssuer>
          <relationshipToIssuer>Edward Wehmer Director of Wintrust Financial</relationshipToIssuer>
          <relationshipToIssuer>Edward Wehmer Exec Officer of Wintrust Financial</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Wintrust Investments, LLC</name>
          <address>
            <com:street1>231 S LaSalle Street, 13th Floor</com:street1>
            <com:city>Chicago</com:city>
            <com:stateOrCountry>IL</com:stateOrCountry>
            <com:zipCode>60604</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>5000</noOfUnitsSold>
        <aggregateMarketValue>420936</aggregateMarketValue>
        <noOfUnitsOutstanding>17000</noOfUnitsOutstanding>
        <approxSaleDate>11/15/2023</approxSaleDate>
        <securitiesExchangeName>NASDAQ</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>11/15/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Donation</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Edward J. Wehmer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>Y</isGiftTransaction>
        <donarAcquiredDate>03/31/1998</donarAcquiredDate>
        <amountOfSecuritiesAcquired>10000</amountOfSecuritiesAcquired>
        <paymentDate>03/31/1998</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>11/17/2023</noticeDate>
        <signature>Edward J. Wehmer</signature>
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text: 144
  0001244290
  XXXXXXXX
  LIVE
  0001015328
  Wintrust Financial Corporation
  001-35077
  9700 West Higgins Road, Suite 800
  Rosemont
  IL
  60018
  8479399000
  Edanddor Foundation
  Edward Wehmer is Founder and Chair of Foundation
  Edward Wehmer Director of Wintrust Financial
  Edward Wehmer Exec Officer of Wintrust Financial
  Common Stock
  Wintrust Investments, LLC
  231 S LaSalle Street, 13th Floor
  Chicago
  IL
  60604
  5000
  420936
  17000
  11/15/2023
  NASDAQ
  Common Stock
  11/15/2023
  Donation
  Edward J. Wehmer
  Y
  03/31/1998
  10000
  03/31/1998
  Cash
  Y
  11/17/2023
  Edward J. Wehmer