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      <issuerAddress>
        <com:street1>2301 RENAISSANCE BOULEVARD</com:street1>
        <com:city>KING OF PRUSSIA</com:city>
        <com:stateOrCountry>PA</com:stateOrCountry>
        <com:zipCode>19406</com:zipCode>
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      <issuerContactPhone>(800) 355-3500</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>ITEM SECOND IRR. TRUST FBO JACOB J. WESTPHAL u/a of JEFFREY R. WESTPHAL dated October 5, 2001</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
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          <com:street1>3000 Schwab Way</com:street1>
          <com:city>Westlake</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>76262</com:zipCode>
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      <natureOfAcquisitionTransaction>Stock Option Exercise</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
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    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
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      <noticeDate>10/04/2024</noticeDate>
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144
0001819296
XXXXXXXX
LIVE
0001806837
Vertex, Inc.
001-39413
2301 RENAISSANCE BOULEVARD
KING OF PRUSSIA
PA
19406
(800) 355-3500
ITEM SECOND IRR. TRUST FBO JACOB J. WESTPHAL u/a of JEFFREY R. WESTPHAL dated October 5, 2001
Member of immediate family of any of the foregoing
Common Class A
Charles Scwhab Corporation
3000 Schwab Way
Westlake
TX
76262
500000
20360000.00
65360518
10/04/2024
NASDAQ
Common Class A
10/12/2023
Stock Option Exercise
Issuer
N
2089000
10/12/2023
N/A
Y
10/04/2024
Jacob Westphal