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        <filerInfo>
            <filer>
                <filerCredentials>
                    <cik>0001523288</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
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        <issuerInfo>
            <issuerCik>0001595974</issuerCik>
            <issuerName>MAGNITE, INC.</issuerName>
            <secFileNumber>001-36384</secFileNumber>
            <issuerAddress>
                <ns2:street1>1250 Broadway, 15th Floor</ns2:street1>
                <ns2:city>New York</ns2:city>
                <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                <ns2:zipCode>10001</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>(212) 243-2769</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>DAVID DAY</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>8th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>39000</noOfUnitsSold>
            <aggregateMarketValue>780000.00</aggregateMarketValue>
            <noOfUnitsOutstanding>140690441</noOfUnitsOutstanding>
            <approxSaleDate>02/07/2025</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>02/07/2025</acquiredDate>
            <natureOfAcquisitionTransaction>Stock Option Exercise</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>39000</amountOfSecuritiesAcquired>
            <paymentDate>02/07/2025</paymentDate>
            <natureOfPayment>Cash</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>DAVID DAY</name>
                <address>
                    <ns2:street1>1250 Broadway, 15th Floor</ns2:street1>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10001</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>02/06/2025</saleDate>
            <amountOfSecuritiesSold>13245</amountOfSecuritiesSold>
            <grossProceeds>243045.75</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>DAVID DAY</name>
                <address>
                    <ns2:street1>1250 Broadway, 15th Floor</ns2:street1>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10001</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>01/03/2025</saleDate>
            <amountOfSecuritiesSold>13345</amountOfSecuritiesSold>
            <grossProceeds>226865.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>DAVID DAY</name>
                <address>
                    <ns2:street1>1250 Broadway, 15th Floor</ns2:street1>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10001</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>12/17/2024</saleDate>
            <amountOfSecuritiesSold>13500</amountOfSecuritiesSold>
            <grossProceeds>220314.60</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>DAVID DAY</name>
                <address>
                    <ns2:street1>1250 Broadway, 15th Floor</ns2:street1>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10001</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>12/16/2024</saleDate>
            <amountOfSecuritiesSold>5804</amountOfSecuritiesSold>
            <grossProceeds>95411.38</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>DAVID DAY</name>
                <address>
                    <ns2:street1>1250 Broadway, 15th Floor</ns2:street1>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10001</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>12/16/2024</saleDate>
            <amountOfSecuritiesSold>5840</amountOfSecuritiesSold>
            <grossProceeds>96003.18</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>02/07/2025</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>09/12/2024</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ David Day</signature>
        </noticeSignature>
    </formData>
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144
0001523288
XXXXXXXX
LIVE
0001595974
MAGNITE, INC.
001-36384
1250 Broadway, 15th Floor
New York
NY
10001
(212) 243-2769
DAVID DAY
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
39000
780000.00
140690441
02/07/2025
NASDAQ
Common
02/07/2025
Stock Option Exercise
ISSUER
N
39000
02/07/2025
Cash
N
DAVID DAY
1250 Broadway, 15th Floor
New York
NY
10001
Common
02/06/2025
13245
243045.75
DAVID DAY
1250 Broadway, 15th Floor
New York
NY
10001
Common
01/03/2025
13345
226865.00
DAVID DAY
1250 Broadway, 15th Floor
New York
NY
10001
Common
12/17/2024
13500
220314.60
DAVID DAY
1250 Broadway, 15th Floor
New York
NY
10001
Common
12/16/2024
5804
95411.38
DAVID DAY
1250 Broadway, 15th Floor
New York
NY
10001
Common
12/16/2024
5840
96003.18
02/07/2025
09/12/2024
/s/ David Day