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      <secFileNumber>001-40456</secFileNumber>
      <issuerAddress>
        <com:street1>135 JANUS INTERNATIONAL BLVD.</com:street1>
        <com:city>TEMPLE</com:city>
        <com:stateOrCountry>GA</com:stateOrCountry>
        <com:zipCode>30179</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>(866) 562-2580</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Cook Brian Scott</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Director</relationshipToIssuer>
      </relationshipsToIssuer>
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    <securitiesInformation>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Fidelity Brokerage Services LLC</name>
        <address>
          <com:street1>245 Summer Street</com:street1>
          <com:city>Boston</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02110</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>80050</noOfUnitsSold>
      <aggregateMarketValue>941325.48</aggregateMarketValue>
      <noOfUnitsOutstanding>146744164</noOfUnitsOutstanding>
      <approxSaleDate>07/25/2023</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
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    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>06/08/2021</acquiredDate>
      <natureOfAcquisitionTransaction>IPO</natureOfAcquisitionTransaction>
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      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>80050</amountOfSecuritiesAcquired>
      <paymentDate>06/08/2021</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
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        <name>Brian Cook</name>
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          <com:street1>c/o Janus International Group, Inc.</com:street1>
          <com:street2>135 Janus International Blvd.</com:street2>
          <com:city>Temple</com:city>
          <com:stateOrCountry>GA</com:stateOrCountry>
          <com:zipCode>30179</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>07/18/2023</saleDate>
      <amountOfSecuritiesSold>50000</amountOfSecuritiesSold>
      <grossProceeds>550000.00</grossProceeds>
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      <sellerDetails>
        <name>Brian Cook</name>
        <address>
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          <com:street2>135 Janus International Blvd.</com:street2>
          <com:city>Temple</com:city>
          <com:stateOrCountry>GA</com:stateOrCountry>
          <com:zipCode>30179</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common stock</securitiesClassTitle>
      <saleDate>07/19/2023</saleDate>
      <amountOfSecuritiesSold>65512</amountOfSecuritiesSold>
      <grossProceeds>733413.40</grossProceeds>
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      <sellerDetails>
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          <com:stateOrCountry>GA</com:stateOrCountry>
          <com:zipCode>30179</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>07/20/2023</saleDate>
      <amountOfSecuritiesSold>56851</amountOfSecuritiesSold>
      <grossProceeds>733979.90</grossProceeds>
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    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Brian Cook</name>
        <address>
          <com:street1>c/o Janus International Group, Inc.</com:street1>
          <com:street2>135 Janus International Blvd.</com:street2>
          <com:city>Temple</com:city>
          <com:stateOrCountry>GA</com:stateOrCountry>
          <com:zipCode>30179</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>07/21/2023</saleDate>
      <amountOfSecuritiesSold>5437</amountOfSecuritiesSold>
      <grossProceeds>59912.27</grossProceeds>
    </securitiesSoldInPast3Months>
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      <sellerDetails>
        <name>Brian Cook</name>
        <address>
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          <com:stateOrCountry>GA</com:stateOrCountry>
          <com:zipCode>30179</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>07/24/2023</saleDate>
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      <grossProceeds>864162.33</grossProceeds>
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    <noticeSignature>
      <noticeDate>07/25/2023</noticeDate>
      <planAdoptionDates>
        <planAdoptionDate>12/15/2022</planAdoptionDate>
      </planAdoptionDates>
      <signature>/s/ Myra King, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Brian Cook</signature>
    </noticeSignature>
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144
0001793106
XXXXXXXX
LIVE
0001839839
Janus International Group, Inc.
001-40456
135 JANUS INTERNATIONAL BLVD.
TEMPLE
GA
30179
(866) 562-2580
Cook Brian Scott
Director
Common Stock
Fidelity Brokerage Services LLC
245 Summer Street
Boston
MA
02110
80050
941325.48
146744164
07/25/2023
NYSE
Common Stock
06/08/2021
IPO
Issuer
N
80050
06/08/2021
N/A
N
Brian Cook
c/o Janus International Group, Inc.
135 Janus International Blvd.
Temple
GA
30179
Common Stock
07/18/2023
50000
550000.00
Brian Cook
c/o Janus International Group, Inc.
135 Janus International Blvd.
Temple
GA
30179
Common stock
07/19/2023
65512
733413.40
Brian Cook
c/o Janus International Group, Inc.
135 Janus International Blvd.
Temple
GA
30179
Common Stock
07/20/2023
56851
733979.90
Brian Cook
c/o Janus International Group, Inc.
135 Janus International Blvd.
Temple
GA
30179
Common Stock
07/21/2023
5437
59912.27
Brian Cook
c/o Janus International Group, Inc.
135 Janus International Blvd.
Temple
GA
30179
Common Stock
07/24/2023
76524
864162.33
07/25/2023
12/15/2022
/s/ Myra King, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Brian Cook