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            <liveTestFlag>LIVE</liveTestFlag>



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            <issuerName>CULLINAN MANAGEMENT INC</issuerName>
            <secFileNumber>001-39856</secFileNumber>
            <issuerAddress>
                <ns2:street1>One Main Street, Suite 1350</ns2:street1>
                <ns2:city>Cambridge</ns2:city>
                <ns2:stateOrCountry>MA</ns2:stateOrCountry>
                <ns2:zipCode>02142</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>6174104650</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>CORINNE SAVILL</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Officer</relationshipToIssuer>
            </relationshipsToIssuer>
        </issuerInfo>
        <securitiesInformation>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <brokerOrMarketmakerDetails>
                <name>Morgan Stanley Smith Barney LLC Executive Financial Services</name>
                <address>
                    <ns2:street1>1 New York Plaza</ns2:street1>
                    <ns2:street2>38th Fl.</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>40000</noOfUnitsSold>
            <aggregateMarketValue>522800.00</aggregateMarketValue>
            <noOfUnitsOutstanding>42780644</noOfUnitsOutstanding>
            <approxSaleDate>01/29/2024</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>01/29/2024</acquiredDate>
            <natureOfAcquisitionTransaction>Exercise of Stock Options</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>40000</amountOfSecuritiesAcquired>
            <paymentDate>01/29/2024</paymentDate>
            <natureOfPayment>Cash</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
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                <name>10b5-1 Sales for CORINNE SAVILL</name>
                <address>
                    <ns2:street1>One Main Street, Suite 1350</ns2:street1>
                    <ns2:city>Cambridge</ns2:city>
                    <ns2:stateOrCountry>MA</ns2:stateOrCountry>
                    <ns2:zipCode>02142</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>01/23/2024</saleDate>
            <amountOfSecuritiesSold>21316</amountOfSecuritiesSold>
            <grossProceeds>265622.94</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for CORINNE SAVILL</name>
                <address>
                    <ns2:street1>One Main Street, Suite 1350</ns2:street1>
                    <ns2:city>Cambridge</ns2:city>
                    <ns2:stateOrCountry>MA</ns2:stateOrCountry>
                    <ns2:zipCode>02142</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>01/22/2024</saleDate>
            <amountOfSecuritiesSold>18684</amountOfSecuritiesSold>
            <grossProceeds>226976.05</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>01/29/2024</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>06/07/2023</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Corinne Savill</signature>
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144
0001837524
XXXXXXXX
LIVE
0001789972
CULLINAN MANAGEMENT INC
001-39856
One Main Street, Suite 1350
Cambridge
MA
02142
6174104650
CORINNE SAVILL
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
38th Fl.
New York
NY
10004
40000
522800.00
42780644
01/29/2024
NASDAQ
Common
01/29/2024
Exercise of Stock Options
Issuer
N
40000
01/29/2024
Cash
N
10b5-1 Sales for CORINNE SAVILL
One Main Street, Suite 1350
Cambridge
MA
02142
Common
01/23/2024
21316
265622.94
10b5-1 Sales for CORINNE SAVILL
One Main Street, Suite 1350
Cambridge
MA
02142
Common
01/22/2024
18684
226976.05
01/29/2024
06/07/2023
/s/ Corinne Savill