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            <liveTestFlag>LIVE</liveTestFlag>



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            <issuerName>WAYSTAR HOLDING CORP</issuerName>
            <secFileNumber>001-42125</secFileNumber>
            <issuerAddress>
                <ns2:street1>1550 Digital Drive, #300</ns2:street1>
                <ns2:city>Lehi</ns2:city>
                <ns2:stateOrCountry>UT</ns2:stateOrCountry>
                <ns2:zipCode>84043</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>8444929782</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>MATTHEW J HAWKINS</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Director</relationshipToIssuer>
                <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>8th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>140001</noOfUnitsSold>
            <aggregateMarketValue>5700840.72</aggregateMarketValue>
            <noOfUnitsOutstanding>173018999</noOfUnitsOutstanding>
            <approxSaleDate>06/10/2025</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>06/10/2025</acquiredDate>
            <natureOfAcquisitionTransaction>Exercise of Stock Options</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>140001</amountOfSecuritiesAcquired>
            <paymentDate>06/10/2025</paymentDate>
            <natureOfPayment>Cash</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
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            <sellerDetails>
                <name>MATTHEW J HAWKINS</name>
                <address>
                    <ns2:street1>1550 Digital Drive, #300</ns2:street1>
                    <ns2:city>Lehi</ns2:city>
                    <ns2:stateOrCountry>UT</ns2:stateOrCountry>
                    <ns2:zipCode>84043</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>06/05/2025</saleDate>
            <amountOfSecuritiesSold>59836</amountOfSecuritiesSold>
            <grossProceeds>2403989.09</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>MATTHEW J HAWKINS</name>
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                    <ns2:street1>1550 Digital Drive, #300</ns2:street1>
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                    <ns2:stateOrCountry>UT</ns2:stateOrCountry>
                    <ns2:zipCode>84043</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>05/27/2025</saleDate>
            <amountOfSecuritiesSold>140164</amountOfSecuritiesSold>
            <grossProceeds>5471287.72</grossProceeds>
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        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>MATTHEW J HAWKINS</name>
                <address>
                    <ns2:street1>1550 Digital Drive, #300</ns2:street1>
                    <ns2:city>Lehi</ns2:city>
                    <ns2:stateOrCountry>UT</ns2:stateOrCountry>
                    <ns2:zipCode>84043</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>05/23/2025</saleDate>
            <amountOfSecuritiesSold>197847</amountOfSecuritiesSold>
            <grossProceeds>7623460.39</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>MATTHEW J HAWKINS</name>
                <address>
                    <ns2:street1>1550 Digital Drive, #300</ns2:street1>
                    <ns2:city>Lehi</ns2:city>
                    <ns2:stateOrCountry>UT</ns2:stateOrCountry>
                    <ns2:zipCode>84043</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>05/22/2025</saleDate>
            <amountOfSecuritiesSold>2153</amountOfSecuritiesSold>
            <grossProceeds>84300.28</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for MATTHEW J HAWKINS</name>
                <address>
                    <ns2:street1>1550 Digital Drive, #300</ns2:street1>
                    <ns2:city>Lehi</ns2:city>
                    <ns2:stateOrCountry>UT</ns2:stateOrCountry>
                    <ns2:zipCode>84043</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>05/13/2025</saleDate>
            <amountOfSecuritiesSold>46667</amountOfSecuritiesSold>
            <grossProceeds>1818656.96</grossProceeds>
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        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for MATTHEW J HAWKINS</name>
                <address>
                    <ns2:street1>1550 Digital Drive, #300</ns2:street1>
                    <ns2:city>Lehi</ns2:city>
                    <ns2:stateOrCountry>UT</ns2:stateOrCountry>
                    <ns2:zipCode>84043</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>04/10/2025</saleDate>
            <amountOfSecuritiesSold>46667</amountOfSecuritiesSold>
            <grossProceeds>1696729.52</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for MATTHEW J HAWKINS</name>
                <address>
                    <ns2:street1>1550 Digital Drive, #300</ns2:street1>
                    <ns2:city>Lehi</ns2:city>
                    <ns2:stateOrCountry>UT</ns2:stateOrCountry>
                    <ns2:zipCode>84043</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>03/13/2025</saleDate>
            <amountOfSecuritiesSold>46665</amountOfSecuritiesSold>
            <grossProceeds>1659001.38</grossProceeds>
        </securitiesSoldInPast3Months>
        <remarks>The securities to be sold were and will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment were and will be the dates of exercise/sale.&#13;
</remarks>
        <noticeSignature>
            <noticeDate>06/10/2025</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>11/22/2024</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Matthew J. Hawkins</signature>
        </noticeSignature>
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144
0001998256
XXXXXXXX
LIVE
0001990354
WAYSTAR HOLDING CORP
001-42125
1550 Digital Drive, #300
Lehi
UT
84043
8444929782
MATTHEW J HAWKINS
Director
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
140001
5700840.72
173018999
06/10/2025
NASDAQ
Common
06/10/2025
Exercise of Stock Options
Issuer
N
140001
06/10/2025
Cash
N
MATTHEW J HAWKINS
1550 Digital Drive, #300
Lehi
UT
84043
Common
06/05/2025
59836
2403989.09
MATTHEW J HAWKINS
1550 Digital Drive, #300
Lehi
UT
84043
Common
05/27/2025
140164
5471287.72
MATTHEW J HAWKINS
1550 Digital Drive, #300
Lehi
UT
84043
Common
05/23/2025
197847
7623460.39
MATTHEW J HAWKINS
1550 Digital Drive, #300
Lehi
UT
84043
Common
05/22/2025
2153
84300.28
10b5-1 Sales for MATTHEW J HAWKINS
1550 Digital Drive, #300
Lehi
UT
84043
Common
05/13/2025
46667
1818656.96
10b5-1 Sales for MATTHEW J HAWKINS
1550 Digital Drive, #300
Lehi
UT
84043
Common
04/10/2025
46667
1696729.52
10b5-1 Sales for MATTHEW J HAWKINS
1550 Digital Drive, #300
Lehi
UT
84043
Common
03/13/2025
46665
1659001.38
The securities to be sold were and will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment were and will be the dates of exercise/sale.
06/10/2025
11/22/2024
/s/ Matthew J. Hawkins