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    <filerInfo>
      <filer>
        <filerCredentials>
          <!-- Field: Pseudo-Tag; ID: Name; Data: STOEHR DAVID L -->
          <cik>0001244289</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0001015328</issuerCik>
      <issuerName>WINTRUST FINANCIAL CORP</issuerName>
      <secFileNumber>001-35077</secFileNumber>
      <issuerAddress>
        <com:street1>9700 W. Higgins Road</com:street1>
        <com:street2>Suite 800</com:street2>
        <com:city>Rosemont</com:city>
        <com:stateOrCountry>IL</com:stateOrCountry>
        <com:zipCode>60018</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>847-939-9000</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>David Stoehr</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>APEX CLEARING</name>
        <address>
          <com:street1>350 N ST PAUL ST</com:street1>
          <com:street2>SUITE 300</com:street2>
          <com:city>DALLAS</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>75201</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>5316</noOfUnitsSold>
      <aggregateMarketValue>699319.80</aggregateMarketValue>
      <noOfUnitsOutstanding>66495227</noOfUnitsOutstanding>
      <approxSaleDate>02/26/2025</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>02/26/2025</acquiredDate>
      <natureOfAcquisitionTransaction>PSA/PSU Vesting</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Wintrust Financial Corporation</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>5316</amountOfSecuritiesAcquired>
      <paymentDate>02/26/2025</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>David Stoehr</name>
        <address>
          <com:street1>9700 W. Higgins Road</com:street1>
          <com:street2>Suite 800</com:street2>
          <com:city>Rosemont</com:city>
          <com:stateOrCountry>IL</com:stateOrCountry>
          <com:zipCode>60018</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>01/28/2025</saleDate>
      <amountOfSecuritiesSold>2363</amountOfSecuritiesSold>
      <grossProceeds>310300.41</grossProceeds>
    </securitiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>02/26/2025</noticeDate>
      <signature>/s/ David Stoehr</signature>
    </noticeSignature>
  </formData>
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144
0001244289
XXXXXXXX
LIVE
0001015328
WINTRUST FINANCIAL CORP
001-35077
9700 W. Higgins Road
Suite 800
Rosemont
IL
60018
847-939-9000
David Stoehr
Officer
Common
APEX CLEARING
350 N ST PAUL ST
SUITE 300
DALLAS
TX
75201
5316
699319.80
66495227
02/26/2025
NASDAQ
Common
02/26/2025
PSA/PSU Vesting
Wintrust Financial Corporation
N
5316
02/26/2025
N/A
N
David Stoehr
9700 W. Higgins Road
Suite 800
Rosemont
IL
60018
Common
01/28/2025
2363
310300.41
02/26/2025
/s/ David Stoehr